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freebsd-src/sys/kern/subr_stats.c
Andrew Turner a5affc0c4c stats: Fix the build under gcc 
Reviewed by:	brooks, imp
Sponsored by:	Arm Ltd
Differential Revision:	https://reviews.freebsd.org/D45302
2024-06-05 09:23:40 +00:00

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/*-
* Copyright (c) 2014-2018 Netflix, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Author: Lawrence Stewart <lstewart@netflix.com>
*/
#include <sys/param.h>
#include <sys/arb.h>
#include <sys/ctype.h>
#include <sys/errno.h>
#include <sys/hash.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/qmath.h>
#include <sys/sbuf.h>
#if defined(DIAGNOSTIC)
#include <sys/tree.h>
#endif
#include <sys/stats.h> /* Must come after qmath.h and arb.h */
#include <sys/stddef.h>
#include <sys/stdint.h>
#include <sys/time.h>
#ifdef _KERNEL
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/rwlock.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#else /* ! _KERNEL */
#include <pthread.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif /* _KERNEL */
struct voistatdata_voistate {
/* Previous VOI value for diff calculation. */
struct voistatdata_numeric prev;
};
#define VS_VSDVALID 0x0001 /* Stat's voistatdata updated at least once. */
struct voistat {
int8_t stype; /* Type of stat e.g. VS_STYPE_SUM. */
enum vsd_dtype dtype : 8; /* Data type of this stat's data. */
uint16_t data_off; /* Blob offset for this stat's data. */
uint16_t dsz; /* Size of stat's data. */
#define VS_EBITS 8
uint16_t errs : VS_EBITS;/* Non-wrapping error count. */
uint16_t flags : 16 - VS_EBITS;
};
/* The voistat error count is capped to avoid wrapping. */
#define VS_INCERRS(vs) do { \
if ((vs)->errs < (1U << VS_EBITS) - 1) \
(vs)->errs++; \
} while (0)
/*
* Ideas for flags:
* - Global or entity specific (global would imply use of counter(9)?)
* - Whether to reset stats on read or not
* - Signal an overflow?
* - Compressed voistat array
*/
#define VOI_REQSTATE 0x0001 /* VOI requires VS_STYPE_VOISTATE. */
struct voi {
int16_t id; /* VOI id. */
enum vsd_dtype dtype : 8; /* Data type of the VOI itself. */
int8_t voistatmaxid; /* Largest allocated voistat index. */
uint16_t stats_off; /* Blob offset for this VOIs stats. */
uint16_t flags;
};
/*
* Memory for the entire blob is allocated as a slab and then offsets are
* maintained to carve up the slab into sections holding different data types.
*
* Ideas for flags:
* - Compressed voi array (trade off memory usage vs search time)
* - Units of offsets (default bytes, flag for e.g. vm_page/KiB/Mib)
*/
struct statsblobv1 {
uint8_t abi;
uint8_t endian;
uint16_t flags;
uint16_t maxsz;
uint16_t cursz;
/* Fields from here down are opaque to consumers. */
uint32_t tplhash; /* Base template hash ID. */
uint16_t stats_off; /* voistat array blob offset. */
uint16_t statsdata_off; /* voistatdata array blob offset. */
sbintime_t created; /* Blob creation time. */
sbintime_t lastrst; /* Time of last reset. */
struct voi vois[]; /* Array indexed by [voi_id]. */
} __aligned(sizeof(void *));
_Static_assert(offsetof(struct statsblobv1, cursz) +
SIZEOF_MEMBER(struct statsblobv1, cursz) ==
offsetof(struct statsblob, opaque),
"statsblobv1 ABI mismatch");
struct statsblobv1_tpl {
struct metablob *mb;
struct statsblobv1 *sb;
};
/* Context passed to iterator callbacks. */
struct sb_iter_ctx {
void *usrctx; /* Caller supplied context. */
uint32_t flags; /* Flags for current iteration. */
int16_t vslot; /* struct voi slot index. */
int8_t vsslot; /* struct voistat slot index. */
};
struct sb_tostrcb_ctx {
struct sbuf *buf;
struct statsblob_tpl *tpl;
enum sb_str_fmt fmt;
uint32_t flags;
};
struct sb_visitcb_ctx {
stats_blob_visitcb_t cb;
void *usrctx;
};
/* Stats blob iterator callback. */
typedef int (*stats_v1_blob_itercb_t)(struct statsblobv1 *sb, struct voi *v,
struct voistat *vs, struct sb_iter_ctx *ctx);
#ifdef _KERNEL
static struct rwlock tpllistlock;
RW_SYSINIT(stats_tpl_list, &tpllistlock, "Stat template list lock");
#define TPL_LIST_RLOCK() rw_rlock(&tpllistlock)
#define TPL_LIST_RUNLOCK() rw_runlock(&tpllistlock)
#define TPL_LIST_WLOCK() rw_wlock(&tpllistlock)
#define TPL_LIST_WUNLOCK() rw_wunlock(&tpllistlock)
#define TPL_LIST_LOCK_ASSERT() rw_assert(&tpllistlock, RA_LOCKED)
#define TPL_LIST_RLOCK_ASSERT() rw_assert(&tpllistlock, RA_RLOCKED)
#define TPL_LIST_WLOCK_ASSERT() rw_assert(&tpllistlock, RA_WLOCKED)
MALLOC_DEFINE(M_STATS, "stats(9) related memory", "stats(9) related memory");
#define stats_free(ptr) free((ptr), M_STATS)
#else /* ! _KERNEL */
static void stats_constructor(void);
static void stats_destructor(void);
static pthread_rwlock_t tpllistlock;
#define TPL_LIST_UNLOCK() pthread_rwlock_unlock(&tpllistlock)
#define TPL_LIST_RLOCK() pthread_rwlock_rdlock(&tpllistlock)
#define TPL_LIST_RUNLOCK() TPL_LIST_UNLOCK()
#define TPL_LIST_WLOCK() pthread_rwlock_wrlock(&tpllistlock)
#define TPL_LIST_WUNLOCK() TPL_LIST_UNLOCK()
#define TPL_LIST_LOCK_ASSERT() do { } while (0)
#define TPL_LIST_RLOCK_ASSERT() do { } while (0)
#define TPL_LIST_WLOCK_ASSERT() do { } while (0)
#ifdef NDEBUG
#define KASSERT(cond, msg) do {} while (0)
#define stats_abort() do {} while (0)
#else /* ! NDEBUG */
#define KASSERT(cond, msg) do { \
if (!(cond)) { \
panic msg; \
} \
} while (0)
#define stats_abort() abort()
#endif /* NDEBUG */
#define stats_free(ptr) free(ptr)
#define panic(fmt, ...) do { \
fprintf(stderr, (fmt), ##__VA_ARGS__); \
stats_abort(); \
} while (0)
#endif /* _KERNEL */
#define SB_V1_MAXSZ 65535
/* Obtain a blob offset pointer. */
#define BLOB_OFFSET(sb, off) ((void *)(((uint8_t *)(sb)) + (off)))
/*
* Number of VOIs in the blob's vois[] array. By virtue of struct voi being a
* power of 2 size, we can shift instead of divide. The shift amount must be
* updated if sizeof(struct voi) ever changes, which the assert should catch.
*/
#define NVOIS(sb) ((int32_t)((((struct statsblobv1 *)(sb))->stats_off - \
sizeof(struct statsblobv1)) >> 3))
_Static_assert(sizeof(struct voi) == 8, "statsblobv1 voi ABI mismatch");
/* Try restrict names to alphanumeric and underscore to simplify JSON compat. */
const char *vs_stype2name[VS_NUM_STYPES] = {
[VS_STYPE_VOISTATE] = "VOISTATE",
[VS_STYPE_SUM] = "SUM",
[VS_STYPE_MAX] = "MAX",
[VS_STYPE_MIN] = "MIN",
[VS_STYPE_HIST] = "HIST",
[VS_STYPE_TDGST] = "TDGST",
};
const char *vs_stype2desc[VS_NUM_STYPES] = {
[VS_STYPE_VOISTATE] = "VOI related state data (not a real stat)",
[VS_STYPE_SUM] = "Simple arithmetic accumulator",
[VS_STYPE_MAX] = "Maximum observed VOI value",
[VS_STYPE_MIN] = "Minimum observed VOI value",
[VS_STYPE_HIST] = "Histogram of observed VOI values",
[VS_STYPE_TDGST] = "t-digest of observed VOI values",
};
const char *vsd_dtype2name[VSD_NUM_DTYPES] = {
[VSD_DTYPE_VOISTATE] = "VOISTATE",
[VSD_DTYPE_INT_S32] = "INT_S32",
[VSD_DTYPE_INT_U32] = "INT_U32",
[VSD_DTYPE_INT_S64] = "INT_S64",
[VSD_DTYPE_INT_U64] = "INT_U64",
[VSD_DTYPE_INT_SLONG] = "INT_SLONG",
[VSD_DTYPE_INT_ULONG] = "INT_ULONG",
[VSD_DTYPE_Q_S32] = "Q_S32",
[VSD_DTYPE_Q_U32] = "Q_U32",
[VSD_DTYPE_Q_S64] = "Q_S64",
[VSD_DTYPE_Q_U64] = "Q_U64",
[VSD_DTYPE_CRHIST32] = "CRHIST32",
[VSD_DTYPE_DRHIST32] = "DRHIST32",
[VSD_DTYPE_DVHIST32] = "DVHIST32",
[VSD_DTYPE_CRHIST64] = "CRHIST64",
[VSD_DTYPE_DRHIST64] = "DRHIST64",
[VSD_DTYPE_DVHIST64] = "DVHIST64",
[VSD_DTYPE_TDGSTCLUST32] = "TDGSTCLUST32",
[VSD_DTYPE_TDGSTCLUST64] = "TDGSTCLUST64",
};
const size_t vsd_dtype2size[VSD_NUM_DTYPES] = {
[VSD_DTYPE_VOISTATE] = sizeof(struct voistatdata_voistate),
[VSD_DTYPE_INT_S32] = sizeof(struct voistatdata_int32),
[VSD_DTYPE_INT_U32] = sizeof(struct voistatdata_int32),
[VSD_DTYPE_INT_S64] = sizeof(struct voistatdata_int64),
[VSD_DTYPE_INT_U64] = sizeof(struct voistatdata_int64),
[VSD_DTYPE_INT_SLONG] = sizeof(struct voistatdata_intlong),
[VSD_DTYPE_INT_ULONG] = sizeof(struct voistatdata_intlong),
[VSD_DTYPE_Q_S32] = sizeof(struct voistatdata_q32),
[VSD_DTYPE_Q_U32] = sizeof(struct voistatdata_q32),
[VSD_DTYPE_Q_S64] = sizeof(struct voistatdata_q64),
[VSD_DTYPE_Q_U64] = sizeof(struct voistatdata_q64),
[VSD_DTYPE_CRHIST32] = sizeof(struct voistatdata_crhist32),
[VSD_DTYPE_DRHIST32] = sizeof(struct voistatdata_drhist32),
[VSD_DTYPE_DVHIST32] = sizeof(struct voistatdata_dvhist32),
[VSD_DTYPE_CRHIST64] = sizeof(struct voistatdata_crhist64),
[VSD_DTYPE_DRHIST64] = sizeof(struct voistatdata_drhist64),
[VSD_DTYPE_DVHIST64] = sizeof(struct voistatdata_dvhist64),
[VSD_DTYPE_TDGSTCLUST32] = sizeof(struct voistatdata_tdgstclust32),
[VSD_DTYPE_TDGSTCLUST64] = sizeof(struct voistatdata_tdgstclust64),
};
static const bool vsd_compoundtype[VSD_NUM_DTYPES] = {
[VSD_DTYPE_VOISTATE] = true,
[VSD_DTYPE_INT_S32] = false,
[VSD_DTYPE_INT_U32] = false,
[VSD_DTYPE_INT_S64] = false,
[VSD_DTYPE_INT_U64] = false,
[VSD_DTYPE_INT_SLONG] = false,
[VSD_DTYPE_INT_ULONG] = false,
[VSD_DTYPE_Q_S32] = false,
[VSD_DTYPE_Q_U32] = false,
[VSD_DTYPE_Q_S64] = false,
[VSD_DTYPE_Q_U64] = false,
[VSD_DTYPE_CRHIST32] = true,
[VSD_DTYPE_DRHIST32] = true,
[VSD_DTYPE_DVHIST32] = true,
[VSD_DTYPE_CRHIST64] = true,
[VSD_DTYPE_DRHIST64] = true,
[VSD_DTYPE_DVHIST64] = true,
[VSD_DTYPE_TDGSTCLUST32] = true,
[VSD_DTYPE_TDGSTCLUST64] = true,
};
const struct voistatdata_numeric numeric_limits[2][VSD_DTYPE_Q_U64 + 1] = {
[LIM_MIN] = {
[VSD_DTYPE_VOISTATE] = {},
[VSD_DTYPE_INT_S32] = {.int32 = {.s32 = INT32_MIN}},
[VSD_DTYPE_INT_U32] = {.int32 = {.u32 = 0}},
[VSD_DTYPE_INT_S64] = {.int64 = {.s64 = INT64_MIN}},
[VSD_DTYPE_INT_U64] = {.int64 = {.u64 = 0}},
[VSD_DTYPE_INT_SLONG] = {.intlong = {.slong = LONG_MIN}},
[VSD_DTYPE_INT_ULONG] = {.intlong = {.ulong = 0}},
[VSD_DTYPE_Q_S32] = {.q32 = {.sq32 = Q_IFMINVAL(INT32_MIN)}},
[VSD_DTYPE_Q_U32] = {.q32 = {.uq32 = 0}},
[VSD_DTYPE_Q_S64] = {.q64 = {.sq64 = Q_IFMINVAL(INT64_MIN)}},
[VSD_DTYPE_Q_U64] = {.q64 = {.uq64 = 0}},
},
[LIM_MAX] = {
[VSD_DTYPE_VOISTATE] = {},
[VSD_DTYPE_INT_S32] = {.int32 = {.s32 = INT32_MAX}},
[VSD_DTYPE_INT_U32] = {.int32 = {.u32 = UINT32_MAX}},
[VSD_DTYPE_INT_S64] = {.int64 = {.s64 = INT64_MAX}},
[VSD_DTYPE_INT_U64] = {.int64 = {.u64 = UINT64_MAX}},
[VSD_DTYPE_INT_SLONG] = {.intlong = {.slong = LONG_MAX}},
[VSD_DTYPE_INT_ULONG] = {.intlong = {.ulong = ULONG_MAX}},
[VSD_DTYPE_Q_S32] = {.q32 = {.sq32 = Q_IFMAXVAL(INT32_MAX)}},
[VSD_DTYPE_Q_U32] = {.q32 = {.uq32 = Q_IFMAXVAL(UINT32_MAX)}},
[VSD_DTYPE_Q_S64] = {.q64 = {.sq64 = Q_IFMAXVAL(INT64_MAX)}},
[VSD_DTYPE_Q_U64] = {.q64 = {.uq64 = Q_IFMAXVAL(UINT64_MAX)}},
}
};
/* tpllistlock protects tpllist and ntpl */
static uint32_t ntpl;
static struct statsblob_tpl **tpllist;
static inline void * stats_realloc(void *ptr, size_t oldsz, size_t newsz,
int flags);
//static void stats_v1_blob_finalise(struct statsblobv1 *sb);
static int stats_v1_blob_init_locked(struct statsblobv1 *sb, uint32_t tpl_id,
uint32_t flags);
static int stats_v1_blob_expand(struct statsblobv1 **sbpp, int newvoibytes,
int newvoistatbytes, int newvoistatdatabytes);
static void stats_v1_blob_iter(struct statsblobv1 *sb,
stats_v1_blob_itercb_t icb, void *usrctx, uint32_t flags);
static inline int stats_v1_vsd_tdgst_add(enum vsd_dtype vs_dtype,
struct voistatdata_tdgst *tdgst, s64q_t x, uint64_t weight, int attempt);
static inline int
ctd32cmp(const struct voistatdata_tdgstctd32 *c1, const struct voistatdata_tdgstctd32 *c2)
{
KASSERT(Q_PRECEQ(c1->mu, c2->mu),
("%s: Q_RELPREC(c1->mu,c2->mu)=%d", __func__,
Q_RELPREC(c1->mu, c2->mu)));
return (Q_QLTQ(c1->mu, c2->mu) ? -1 : 1);
}
ARB_GENERATE_STATIC(ctdth32, voistatdata_tdgstctd32, ctdlnk, ctd32cmp);
static inline int
ctd64cmp(const struct voistatdata_tdgstctd64 *c1, const struct voistatdata_tdgstctd64 *c2)
{
KASSERT(Q_PRECEQ(c1->mu, c2->mu),
("%s: Q_RELPREC(c1->mu,c2->mu)=%d", __func__,
Q_RELPREC(c1->mu, c2->mu)));
return (Q_QLTQ(c1->mu, c2->mu) ? -1 : 1);
}
ARB_GENERATE_STATIC(ctdth64, voistatdata_tdgstctd64, ctdlnk, ctd64cmp);
#ifdef DIAGNOSTIC
RB_GENERATE_STATIC(rbctdth32, voistatdata_tdgstctd32, rblnk, ctd32cmp);
RB_GENERATE_STATIC(rbctdth64, voistatdata_tdgstctd64, rblnk, ctd64cmp);
#endif
static inline sbintime_t
stats_sbinuptime(void)
{
sbintime_t sbt;
#ifdef _KERNEL
sbt = sbinuptime();
#else /* ! _KERNEL */
struct timespec tp;
clock_gettime(CLOCK_MONOTONIC_FAST, &tp);
sbt = tstosbt(tp);
#endif /* _KERNEL */
return (sbt);
}
static inline void *
stats_realloc(void *ptr, size_t oldsz, size_t newsz, int flags)
{
#ifdef _KERNEL
/* Default to M_NOWAIT if neither M_NOWAIT or M_WAITOK are set. */
if (!(flags & (M_WAITOK | M_NOWAIT)))
flags |= M_NOWAIT;
ptr = realloc(ptr, newsz, M_STATS, flags);
#else /* ! _KERNEL */
ptr = realloc(ptr, newsz);
if ((flags & M_ZERO) && ptr != NULL) {
if (oldsz == 0)
memset(ptr, '\0', newsz);
else if (newsz > oldsz)
memset(BLOB_OFFSET(ptr, oldsz), '\0', newsz - oldsz);
}
#endif /* _KERNEL */
return (ptr);
}
static inline char *
stats_strdup(const char *s,
#ifdef _KERNEL
int flags)
{
char *copy;
size_t len;
if (!(flags & (M_WAITOK | M_NOWAIT)))
flags |= M_NOWAIT;
len = strlen(s) + 1;
if ((copy = malloc(len, M_STATS, flags)) != NULL)
bcopy(s, copy, len);
return (copy);
#else
int flags __unused)
{
return (strdup(s));
#endif
}
static inline void
stats_tpl_update_hash(struct statsblob_tpl *tpl)
{
TPL_LIST_WLOCK_ASSERT();
tpl->mb->tplhash = hash32_str(tpl->mb->tplname, 0);
for (int voi_id = 0; voi_id < NVOIS(tpl->sb); voi_id++) {
if (tpl->mb->voi_meta[voi_id].name != NULL)
tpl->mb->tplhash = hash32_str(
tpl->mb->voi_meta[voi_id].name, tpl->mb->tplhash);
}
tpl->mb->tplhash = hash32_buf(tpl->sb, tpl->sb->cursz,
tpl->mb->tplhash);
}
static inline uint64_t
stats_pow_u64(uint64_t base, uint64_t exp)
{
uint64_t result = 1;
while (exp) {
if (exp & 1)
result *= base;
exp >>= 1;
base *= base;
}
return (result);
}
static inline int
stats_vss_hist_bkt_hlpr(struct vss_hist_hlpr_info *info, uint32_t curbkt,
struct voistatdata_numeric *bkt_lb, struct voistatdata_numeric *bkt_ub)
{
uint64_t step = 0;
int error = 0;
switch (info->scheme) {
case BKT_LIN:
step = info->lin.stepinc;
break;
case BKT_EXP:
step = stats_pow_u64(info->exp.stepbase,
info->exp.stepexp + curbkt);
break;
case BKT_LINEXP:
{
uint64_t curstepexp = 1;
switch (info->voi_dtype) {
case VSD_DTYPE_INT_S32:
while ((int32_t)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= bkt_lb->int32.s32)
curstepexp++;
break;
case VSD_DTYPE_INT_U32:
while ((uint32_t)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= bkt_lb->int32.u32)
curstepexp++;
break;
case VSD_DTYPE_INT_S64:
while ((int64_t)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= bkt_lb->int64.s64)
curstepexp++;
break;
case VSD_DTYPE_INT_U64:
while ((uint64_t)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= bkt_lb->int64.u64)
curstepexp++;
break;
case VSD_DTYPE_INT_SLONG:
while ((long)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= bkt_lb->intlong.slong)
curstepexp++;
break;
case VSD_DTYPE_INT_ULONG:
while ((unsigned long)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= bkt_lb->intlong.ulong)
curstepexp++;
break;
case VSD_DTYPE_Q_S32:
while ((s32q_t)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= Q_GIVAL(bkt_lb->q32.sq32))
break;
case VSD_DTYPE_Q_U32:
while ((u32q_t)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= Q_GIVAL(bkt_lb->q32.uq32))
break;
case VSD_DTYPE_Q_S64:
while ((s64q_t)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= Q_GIVAL(bkt_lb->q64.sq64))
curstepexp++;
break;
case VSD_DTYPE_Q_U64:
while ((u64q_t)stats_pow_u64(info->linexp.stepbase,
curstepexp) <= Q_GIVAL(bkt_lb->q64.uq64))
curstepexp++;
break;
default:
break;
}
step = stats_pow_u64(info->linexp.stepbase, curstepexp) /
info->linexp.linstepdiv;
if (step == 0)
step = 1;
break;
}
default:
break;
}
if (info->scheme == BKT_USR) {
*bkt_lb = info->usr.bkts[curbkt].lb;
*bkt_ub = info->usr.bkts[curbkt].ub;
} else if (step != 0) {
switch (info->voi_dtype) {
case VSD_DTYPE_INT_S32:
bkt_ub->int32.s32 += (int32_t)step;
break;
case VSD_DTYPE_INT_U32:
bkt_ub->int32.u32 += (uint32_t)step;
break;
case VSD_DTYPE_INT_S64:
bkt_ub->int64.s64 += (int64_t)step;
break;
case VSD_DTYPE_INT_U64:
bkt_ub->int64.u64 += (uint64_t)step;
break;
case VSD_DTYPE_INT_SLONG:
bkt_ub->intlong.slong += (long)step;
break;
case VSD_DTYPE_INT_ULONG:
bkt_ub->intlong.ulong += (unsigned long)step;
break;
case VSD_DTYPE_Q_S32:
error = Q_QADDI(&bkt_ub->q32.sq32, step);
break;
case VSD_DTYPE_Q_U32:
error = Q_QADDI(&bkt_ub->q32.uq32, step);
break;
case VSD_DTYPE_Q_S64:
error = Q_QADDI(&bkt_ub->q64.sq64, step);
break;
case VSD_DTYPE_Q_U64:
error = Q_QADDI(&bkt_ub->q64.uq64, step);
break;
default:
break;
}
} else { /* info->scheme != BKT_USR && step == 0 */
return (EINVAL);
}
return (error);
}
static uint32_t
stats_vss_hist_nbkts_hlpr(struct vss_hist_hlpr_info *info)
{
struct voistatdata_numeric bkt_lb, bkt_ub;
uint32_t nbkts;
int done;
if (info->scheme == BKT_USR) {
/* XXXLAS: Setting info->{lb,ub} from macro is tricky. */
info->lb = info->usr.bkts[0].lb;
info->ub = info->usr.bkts[info->usr.nbkts - 1].lb;
}
nbkts = 0;
done = 0;
bkt_ub = info->lb;
do {
bkt_lb = bkt_ub;
if (stats_vss_hist_bkt_hlpr(info, nbkts++, &bkt_lb, &bkt_ub))
return (0);
if (info->scheme == BKT_USR)
done = (nbkts == info->usr.nbkts);
else {
switch (info->voi_dtype) {
case VSD_DTYPE_INT_S32:
done = (bkt_ub.int32.s32 > info->ub.int32.s32);
break;
case VSD_DTYPE_INT_U32:
done = (bkt_ub.int32.u32 > info->ub.int32.u32);
break;
case VSD_DTYPE_INT_S64:
done = (bkt_ub.int64.s64 > info->ub.int64.s64);
break;
case VSD_DTYPE_INT_U64:
done = (bkt_ub.int64.u64 > info->ub.int64.u64);
break;
case VSD_DTYPE_INT_SLONG:
done = (bkt_ub.intlong.slong >
info->ub.intlong.slong);
break;
case VSD_DTYPE_INT_ULONG:
done = (bkt_ub.intlong.ulong >
info->ub.intlong.ulong);
break;
case VSD_DTYPE_Q_S32:
done = Q_QGTQ(bkt_ub.q32.sq32,
info->ub.q32.sq32);
break;
case VSD_DTYPE_Q_U32:
done = Q_QGTQ(bkt_ub.q32.uq32,
info->ub.q32.uq32);
break;
case VSD_DTYPE_Q_S64:
done = Q_QGTQ(bkt_ub.q64.sq64,
info->ub.q64.sq64);
break;
case VSD_DTYPE_Q_U64:
done = Q_QGTQ(bkt_ub.q64.uq64,
info->ub.q64.uq64);
break;
default:
return (0);
}
}
} while (!done);
if (info->flags & VSD_HIST_LBOUND_INF)
nbkts++;
if (info->flags & VSD_HIST_UBOUND_INF)
nbkts++;
return (nbkts);
}
int
stats_vss_hist_hlpr(enum vsd_dtype voi_dtype, struct voistatspec *vss,
struct vss_hist_hlpr_info *info)
{
struct voistatdata_hist *hist;
struct voistatdata_numeric bkt_lb, bkt_ub, *lbinfbktlb, *lbinfbktub,
*ubinfbktlb, *ubinfbktub;
uint32_t bkt, nbkts, nloop;
if (vss == NULL || info == NULL || (info->flags &
(VSD_HIST_LBOUND_INF|VSD_HIST_UBOUND_INF) && (info->hist_dtype ==
VSD_DTYPE_DVHIST32 || info->hist_dtype == VSD_DTYPE_DVHIST64)))
return (EINVAL);
info->voi_dtype = voi_dtype;
if ((nbkts = stats_vss_hist_nbkts_hlpr(info)) == 0)
return (EINVAL);
switch (info->hist_dtype) {
case VSD_DTYPE_CRHIST32:
vss->vsdsz = HIST_NBKTS2VSDSZ(crhist32, nbkts);
break;
case VSD_DTYPE_DRHIST32:
vss->vsdsz = HIST_NBKTS2VSDSZ(drhist32, nbkts);
break;
case VSD_DTYPE_DVHIST32:
vss->vsdsz = HIST_NBKTS2VSDSZ(dvhist32, nbkts);
break;
case VSD_DTYPE_CRHIST64:
vss->vsdsz = HIST_NBKTS2VSDSZ(crhist64, nbkts);
break;
case VSD_DTYPE_DRHIST64:
vss->vsdsz = HIST_NBKTS2VSDSZ(drhist64, nbkts);
break;
case VSD_DTYPE_DVHIST64:
vss->vsdsz = HIST_NBKTS2VSDSZ(dvhist64, nbkts);
break;
default:
return (EINVAL);
}
vss->iv = stats_realloc(NULL, 0, vss->vsdsz, M_ZERO);
if (vss->iv == NULL)
return (ENOMEM);
hist = (struct voistatdata_hist *)vss->iv;
bkt_ub = info->lb;
for (bkt = (info->flags & VSD_HIST_LBOUND_INF), nloop = 0;
bkt < nbkts;
bkt++, nloop++) {
bkt_lb = bkt_ub;
if (stats_vss_hist_bkt_hlpr(info, nloop, &bkt_lb, &bkt_ub))
return (EINVAL);
switch (info->hist_dtype) {
case VSD_DTYPE_CRHIST32:
VSD(crhist32, hist)->bkts[bkt].lb = bkt_lb;
break;
case VSD_DTYPE_DRHIST32:
VSD(drhist32, hist)->bkts[bkt].lb = bkt_lb;
VSD(drhist32, hist)->bkts[bkt].ub = bkt_ub;
break;
case VSD_DTYPE_DVHIST32:
VSD(dvhist32, hist)->bkts[bkt].val = bkt_lb;
break;
case VSD_DTYPE_CRHIST64:
VSD(crhist64, hist)->bkts[bkt].lb = bkt_lb;
break;
case VSD_DTYPE_DRHIST64:
VSD(drhist64, hist)->bkts[bkt].lb = bkt_lb;
VSD(drhist64, hist)->bkts[bkt].ub = bkt_ub;
break;
case VSD_DTYPE_DVHIST64:
VSD(dvhist64, hist)->bkts[bkt].val = bkt_lb;
break;
default:
return (EINVAL);
}
}
lbinfbktlb = lbinfbktub = ubinfbktlb = ubinfbktub = NULL;
switch (info->hist_dtype) {
case VSD_DTYPE_CRHIST32:
lbinfbktlb = &VSD(crhist32, hist)->bkts[0].lb;
ubinfbktlb = &VSD(crhist32, hist)->bkts[nbkts - 1].lb;
break;
case VSD_DTYPE_DRHIST32:
lbinfbktlb = &VSD(drhist32, hist)->bkts[0].lb;
lbinfbktub = &VSD(drhist32, hist)->bkts[0].ub;
ubinfbktlb = &VSD(drhist32, hist)->bkts[nbkts - 1].lb;
ubinfbktub = &VSD(drhist32, hist)->bkts[nbkts - 1].ub;
break;
case VSD_DTYPE_CRHIST64:
lbinfbktlb = &VSD(crhist64, hist)->bkts[0].lb;
ubinfbktlb = &VSD(crhist64, hist)->bkts[nbkts - 1].lb;
break;
case VSD_DTYPE_DRHIST64:
lbinfbktlb = &VSD(drhist64, hist)->bkts[0].lb;
lbinfbktub = &VSD(drhist64, hist)->bkts[0].ub;
ubinfbktlb = &VSD(drhist64, hist)->bkts[nbkts - 1].lb;
ubinfbktub = &VSD(drhist64, hist)->bkts[nbkts - 1].ub;
break;
case VSD_DTYPE_DVHIST32:
case VSD_DTYPE_DVHIST64:
break;
default:
return (EINVAL);
}
if ((info->flags & VSD_HIST_LBOUND_INF) && lbinfbktlb) {
*lbinfbktlb = numeric_limits[LIM_MIN][info->voi_dtype];
/*
* Assignment from numeric_limit array for Q types assigns max
* possible integral/fractional value for underlying data type,
* but we must set control bits for this specific histogram per
* the user's choice of fractional bits, which we extract from
* info->lb.
*/
if (info->voi_dtype == VSD_DTYPE_Q_S32 ||
info->voi_dtype == VSD_DTYPE_Q_U32) {
/* Signedness doesn't matter for setting control bits. */
Q_SCVAL(lbinfbktlb->q32.sq32,
Q_GCVAL(info->lb.q32.sq32));
} else if (info->voi_dtype == VSD_DTYPE_Q_S64 ||
info->voi_dtype == VSD_DTYPE_Q_U64) {
/* Signedness doesn't matter for setting control bits. */
Q_SCVAL(lbinfbktlb->q64.sq64,
Q_GCVAL(info->lb.q64.sq64));
}
if (lbinfbktub)
*lbinfbktub = info->lb;
}
if ((info->flags & VSD_HIST_UBOUND_INF) && ubinfbktlb) {
*ubinfbktlb = bkt_lb;
if (ubinfbktub) {
*ubinfbktub = numeric_limits[LIM_MAX][info->voi_dtype];
if (info->voi_dtype == VSD_DTYPE_Q_S32 ||
info->voi_dtype == VSD_DTYPE_Q_U32) {
Q_SCVAL(ubinfbktub->q32.sq32,
Q_GCVAL(info->lb.q32.sq32));
} else if (info->voi_dtype == VSD_DTYPE_Q_S64 ||
info->voi_dtype == VSD_DTYPE_Q_U64) {
Q_SCVAL(ubinfbktub->q64.sq64,
Q_GCVAL(info->lb.q64.sq64));
}
}
}
return (0);
}
int
stats_vss_tdgst_hlpr(enum vsd_dtype voi_dtype, struct voistatspec *vss,
struct vss_tdgst_hlpr_info *info)
{
struct voistatdata_tdgst *tdgst;
struct ctdth32 *ctd32tree;
struct ctdth64 *ctd64tree;
struct voistatdata_tdgstctd32 *ctd32;
struct voistatdata_tdgstctd64 *ctd64;
info->voi_dtype = voi_dtype;
switch (info->tdgst_dtype) {
case VSD_DTYPE_TDGSTCLUST32:
vss->vsdsz = TDGST_NCTRS2VSDSZ(tdgstclust32, info->nctds);
break;
case VSD_DTYPE_TDGSTCLUST64:
vss->vsdsz = TDGST_NCTRS2VSDSZ(tdgstclust64, info->nctds);
break;
default:
return (EINVAL);
}
vss->iv = stats_realloc(NULL, 0, vss->vsdsz, M_ZERO);
if (vss->iv == NULL)
return (ENOMEM);
tdgst = (struct voistatdata_tdgst *)vss->iv;
switch (info->tdgst_dtype) {
case VSD_DTYPE_TDGSTCLUST32:
ctd32tree = &VSD(tdgstclust32, tdgst)->ctdtree;
ARB_INIT(ctd32, ctdlnk, ctd32tree, info->nctds) {
Q_INI(&ctd32->mu, 0, 0, info->prec);
}
break;
case VSD_DTYPE_TDGSTCLUST64:
ctd64tree = &VSD(tdgstclust64, tdgst)->ctdtree;
ARB_INIT(ctd64, ctdlnk, ctd64tree, info->nctds) {
Q_INI(&ctd64->mu, 0, 0, info->prec);
}
break;
default:
return (EINVAL);
}
return (0);
}
int
stats_vss_numeric_hlpr(enum vsd_dtype voi_dtype, struct voistatspec *vss,
struct vss_numeric_hlpr_info *info)
{
struct voistatdata_numeric iv;
switch (vss->stype) {
case VS_STYPE_SUM:
iv = stats_ctor_vsd_numeric(0);
break;
case VS_STYPE_MIN:
iv = numeric_limits[LIM_MAX][voi_dtype];
break;
case VS_STYPE_MAX:
iv = numeric_limits[LIM_MIN][voi_dtype];
break;
default:
return (EINVAL);
}
vss->iv = stats_realloc(NULL, 0, vsd_dtype2size[voi_dtype], 0);
if (vss->iv == NULL)
return (ENOMEM);
vss->vs_dtype = voi_dtype;
vss->vsdsz = vsd_dtype2size[voi_dtype];
switch (voi_dtype) {
case VSD_DTYPE_INT_S32:
*((int32_t *)vss->iv) = iv.int32.s32;
break;
case VSD_DTYPE_INT_U32:
*((uint32_t *)vss->iv) = iv.int32.u32;
break;
case VSD_DTYPE_INT_S64:
*((int64_t *)vss->iv) = iv.int64.s64;
break;
case VSD_DTYPE_INT_U64:
*((uint64_t *)vss->iv) = iv.int64.u64;
break;
case VSD_DTYPE_INT_SLONG:
*((long *)vss->iv) = iv.intlong.slong;
break;
case VSD_DTYPE_INT_ULONG:
*((unsigned long *)vss->iv) = iv.intlong.ulong;
break;
case VSD_DTYPE_Q_S32:
*((s32q_t *)vss->iv) = Q_SCVAL(iv.q32.sq32,
Q_CTRLINI(info->prec));
break;
case VSD_DTYPE_Q_U32:
*((u32q_t *)vss->iv) = Q_SCVAL(iv.q32.uq32,
Q_CTRLINI(info->prec));
break;
case VSD_DTYPE_Q_S64:
*((s64q_t *)vss->iv) = Q_SCVAL(iv.q64.sq64,
Q_CTRLINI(info->prec));
break;
case VSD_DTYPE_Q_U64:
*((u64q_t *)vss->iv) = Q_SCVAL(iv.q64.uq64,
Q_CTRLINI(info->prec));
break;
default:
break;
}
return (0);
}
int
stats_vss_hlpr_init(enum vsd_dtype voi_dtype, uint32_t nvss,
struct voistatspec *vss)
{
int i, ret;
for (i = nvss - 1; i >= 0; i--) {
if (vss[i].hlpr && (ret = vss[i].hlpr(voi_dtype, &vss[i],
vss[i].hlprinfo)) != 0)
return (ret);
}
return (0);
}
void
stats_vss_hlpr_cleanup(uint32_t nvss, struct voistatspec *vss)
{
int i;
for (i = nvss - 1; i >= 0; i--) {
if (vss[i].hlpr) {
stats_free((void *)vss[i].iv);
vss[i].iv = NULL;
}
}
}
int
stats_tpl_fetch(int tpl_id, struct statsblob_tpl **tpl)
{
int error;
error = 0;
TPL_LIST_WLOCK();
if (tpl_id < 0 || tpl_id >= (int)ntpl) {
error = ENOENT;
} else {
*tpl = tpllist[tpl_id];
/* XXXLAS: Acquire refcount on tpl. */
}
TPL_LIST_WUNLOCK();
return (error);
}
int
stats_tpl_fetch_allocid(const char *name, uint32_t hash)
{
int i, tpl_id;
tpl_id = -ESRCH;
TPL_LIST_RLOCK();
for (i = ntpl - 1; i >= 0; i--) {
if (name != NULL) {
if (strlen(name) == strlen(tpllist[i]->mb->tplname) &&
strncmp(name, tpllist[i]->mb->tplname,
TPL_MAX_NAME_LEN) == 0 && (!hash || hash ==
tpllist[i]->mb->tplhash)) {
tpl_id = i;
break;
}
} else if (hash == tpllist[i]->mb->tplhash) {
tpl_id = i;
break;
}
}
TPL_LIST_RUNLOCK();
return (tpl_id);
}
int
stats_tpl_id2name(uint32_t tpl_id, char *buf, size_t len)
{
int error;
error = 0;
TPL_LIST_RLOCK();
if (tpl_id < ntpl) {
if (buf != NULL && len > strlen(tpllist[tpl_id]->mb->tplname))
strlcpy(buf, tpllist[tpl_id]->mb->tplname, len);
else
error = EOVERFLOW;
} else
error = ENOENT;
TPL_LIST_RUNLOCK();
return (error);
}
int
stats_tpl_sample_rollthedice(struct stats_tpl_sample_rate *rates, int nrates,
void *seed_bytes, size_t seed_len)
{
uint32_t cum_pct, rnd_pct;
int i;
cum_pct = 0;
/*
* Choose a pseudorandom or seeded number in range [0,100] and use
* it to make a sampling decision and template selection where required.
* If no seed is supplied, a PRNG is used to generate a pseudorandom
* number so that every selection is independent. If a seed is supplied,
* the caller desires random selection across different seeds, but
* deterministic selection given the same seed. This is achieved by
* hashing the seed and using the hash as the random number source.
*
* XXXLAS: Characterise hash function output distribution.
*/
if (seed_bytes == NULL)
rnd_pct = random() / (INT32_MAX / 100);
else
rnd_pct = hash32_buf(seed_bytes, seed_len, 0) /
(UINT32_MAX / 100U);
/*
* We map the randomly selected percentage on to the interval [0,100]
* consisting of the cumulatively summed template sampling percentages.
* The difference between the cumulative sum of all template sampling
* percentages and 100 is treated as a NULL assignment i.e. no stats
* template will be assigned, and -1 returned instead.
*/
for (i = 0; i < nrates; i++) {
cum_pct += rates[i].tpl_sample_pct;
KASSERT(cum_pct <= 100, ("%s cum_pct %u > 100", __func__,
cum_pct));
if (rnd_pct > cum_pct || rates[i].tpl_sample_pct == 0)
continue;
return (rates[i].tpl_slot_id);
}
return (-1);
}
int
stats_v1_blob_clone(struct statsblobv1 **dst, size_t dstmaxsz,
struct statsblobv1 *src, uint32_t flags)
{
int error, tmperror;
error = tmperror = 0;
if (src == NULL || dst == NULL ||
src->cursz < sizeof(struct statsblob) ||
((flags & SB_CLONE_ALLOCDST) &&
(flags & (SB_CLONE_USRDSTNOFAULT | SB_CLONE_USRDST)))) {
error = EINVAL;
} else if (flags & SB_CLONE_ALLOCDST) {
*dst = stats_realloc(NULL, 0, src->cursz, 0);
if (*dst)
(*dst)->maxsz = dstmaxsz = src->cursz;
else
error = ENOMEM;
} else if (*dst == NULL || dstmaxsz < sizeof(struct statsblob)) {
error = EINVAL;
}
if (!error) {
size_t postcurszlen;
/*
* Clone src into dst except for the maxsz field. If dst is too
* small to hold all of src, only copy src's header and return
* EOVERFLOW.
*/
#ifdef _KERNEL
if (flags & SB_CLONE_USRDSTNOFAULT)
error = copyout_nofault(src, *dst,
offsetof(struct statsblob, maxsz));
else if (flags & SB_CLONE_USRDST)
error = copyout(src, *dst,
offsetof(struct statsblob, maxsz));
else
#endif
memcpy(*dst, src, offsetof(struct statsblob, maxsz));
#ifdef _KERNEL
if (error != 0)
goto out;
#endif
if (dstmaxsz >= src->cursz) {
postcurszlen = src->cursz -
offsetof(struct statsblob, cursz);
} else {
error = EOVERFLOW;
postcurszlen = sizeof(struct statsblob) -
offsetof(struct statsblob, cursz);
}
#ifdef _KERNEL
if (flags & SB_CLONE_USRDSTNOFAULT)
tmperror = copyout_nofault(&(src->cursz), &((*dst)->cursz),
postcurszlen);
else if (flags & SB_CLONE_USRDST)
tmperror = copyout(&(src->cursz), &((*dst)->cursz),
postcurszlen);
else
#endif
memcpy(&((*dst)->cursz), &(src->cursz), postcurszlen);
error = error ? error : tmperror;
}
#ifdef _KERNEL
out:
#endif
return (error);
}
int
stats_v1_tpl_alloc(const char *name, uint32_t flags __unused)
{
struct statsblobv1_tpl *tpl, **newtpllist;
struct statsblobv1 *tpl_sb;
struct metablob *tpl_mb;
int tpl_id;
if (name != NULL && strlen(name) > TPL_MAX_NAME_LEN)
return (-EINVAL);
if (name != NULL && stats_tpl_fetch_allocid(name, 0) >= 0)
return (-EEXIST);
tpl = stats_realloc(NULL, 0, sizeof(struct statsblobv1_tpl), M_ZERO);
tpl_mb = stats_realloc(NULL, 0, sizeof(struct metablob), M_ZERO);
tpl_sb = stats_realloc(NULL, 0, sizeof(struct statsblobv1), M_ZERO);
if (tpl_mb != NULL && name != NULL)
tpl_mb->tplname = stats_strdup(name, 0);
if (tpl == NULL || tpl_sb == NULL || tpl_mb == NULL ||
tpl_mb->tplname == NULL) {
stats_free(tpl);
stats_free(tpl_sb);
if (tpl_mb != NULL) {
stats_free(tpl_mb->tplname);
stats_free(tpl_mb);
}
return (-ENOMEM);
}
tpl->mb = tpl_mb;
tpl->sb = tpl_sb;
tpl_sb->abi = STATS_ABI_V1;
tpl_sb->endian =
#if BYTE_ORDER == LITTLE_ENDIAN
SB_LE;
#elif BYTE_ORDER == BIG_ENDIAN
SB_BE;
#else
SB_UE;
#endif
tpl_sb->cursz = tpl_sb->maxsz = sizeof(struct statsblobv1);
tpl_sb->stats_off = tpl_sb->statsdata_off = sizeof(struct statsblobv1);
TPL_LIST_WLOCK();
newtpllist = stats_realloc(tpllist, ntpl * sizeof(void *),
(ntpl + 1) * sizeof(void *), 0);
if (newtpllist != NULL) {
tpl_id = ntpl++;
tpllist = (struct statsblob_tpl **)newtpllist;
tpllist[tpl_id] = (struct statsblob_tpl *)tpl;
stats_tpl_update_hash(tpllist[tpl_id]);
} else {
stats_free(tpl);
stats_free(tpl_sb);
if (tpl_mb != NULL) {
stats_free(tpl_mb->tplname);
stats_free(tpl_mb);
}
tpl_id = -ENOMEM;
}
TPL_LIST_WUNLOCK();
return (tpl_id);
}
int
stats_v1_tpl_add_voistats(uint32_t tpl_id, int32_t voi_id, const char *voi_name,
enum vsd_dtype voi_dtype, uint32_t nvss, struct voistatspec *vss,
uint32_t flags)
{
struct voi *voi;
struct voistat *tmpstat;
struct statsblobv1 *tpl_sb;
struct metablob *tpl_mb;
int error, i, newstatdataidx, newvoibytes, newvoistatbytes,
newvoistatdatabytes, newvoistatmaxid;
uint32_t nbytes;
if (voi_id < 0 || voi_dtype == 0 || voi_dtype >= VSD_NUM_DTYPES ||
nvss == 0 || vss == NULL)
return (EINVAL);
error = nbytes = newvoibytes = newvoistatbytes =
newvoistatdatabytes = 0;
newvoistatmaxid = -1;
/* Calculate the number of bytes required for the new voistats. */
for (i = nvss - 1; i >= 0; i--) {
if (vss[i].stype == 0 || vss[i].stype >= VS_NUM_STYPES ||
vss[i].vs_dtype == 0 || vss[i].vs_dtype >= VSD_NUM_DTYPES ||
vss[i].iv == NULL || vss[i].vsdsz == 0)
return (EINVAL);
if ((int)vss[i].stype > newvoistatmaxid)
newvoistatmaxid = vss[i].stype;
newvoistatdatabytes += vss[i].vsdsz;
}
if (flags & SB_VOI_RELUPDATE) {
/* XXXLAS: VOI state bytes may need to vary based on stat types. */
newvoistatdatabytes += sizeof(struct voistatdata_voistate);
}
nbytes += newvoistatdatabytes;
TPL_LIST_WLOCK();
if (tpl_id < ntpl) {
tpl_sb = (struct statsblobv1 *)tpllist[tpl_id]->sb;
tpl_mb = tpllist[tpl_id]->mb;
if (voi_id >= NVOIS(tpl_sb) || tpl_sb->vois[voi_id].id == -1) {
/* Adding a new VOI and associated stats. */
if (voi_id >= NVOIS(tpl_sb)) {
/* We need to grow the tpl_sb->vois array. */
newvoibytes = (voi_id - (NVOIS(tpl_sb) - 1)) *
sizeof(struct voi);
nbytes += newvoibytes;
}
newvoistatbytes =
(newvoistatmaxid + 1) * sizeof(struct voistat);
} else {
/* Adding stats to an existing VOI. */
if (newvoistatmaxid >
tpl_sb->vois[voi_id].voistatmaxid) {
newvoistatbytes = (newvoistatmaxid -
tpl_sb->vois[voi_id].voistatmaxid) *
sizeof(struct voistat);
}
/* XXXLAS: KPI does not yet support expanding VOIs. */
error = EOPNOTSUPP;
}
nbytes += newvoistatbytes;
if (!error && newvoibytes > 0) {
struct voi_meta *voi_meta = tpl_mb->voi_meta;
voi_meta = stats_realloc(voi_meta, voi_meta == NULL ?
0 : NVOIS(tpl_sb) * sizeof(struct voi_meta),
(1 + voi_id) * sizeof(struct voi_meta),
M_ZERO);
if (voi_meta == NULL)
error = ENOMEM;
else
tpl_mb->voi_meta = voi_meta;
}
if (!error) {
/* NB: Resizing can change where tpl_sb points. */
error = stats_v1_blob_expand(&tpl_sb, newvoibytes,
newvoistatbytes, newvoistatdatabytes);
}
if (!error) {
tpl_mb->voi_meta[voi_id].name = stats_strdup(voi_name,
0);
if (tpl_mb->voi_meta[voi_id].name == NULL)
error = ENOMEM;
}
if (!error) {
/* Update the template list with the resized pointer. */
tpllist[tpl_id]->sb = (struct statsblob *)tpl_sb;
/* Update the template. */
voi = &tpl_sb->vois[voi_id];
if (voi->id < 0) {
/* VOI is new and needs to be initialised. */
voi->id = voi_id;
voi->dtype = voi_dtype;
voi->stats_off = tpl_sb->stats_off;
if (flags & SB_VOI_RELUPDATE)
voi->flags |= VOI_REQSTATE;
} else {
/*
* XXXLAS: When this else block is written, the
* "KPI does not yet support expanding VOIs"
* error earlier in this function can be
* removed. What is required here is to shuffle
* the voistat array such that the new stats for
* the voi are contiguous, which will displace
* stats for other vois that reside after the
* voi being updated. The other vois then need
* to have their stats_off adjusted post
* shuffle.
*/
}
voi->voistatmaxid = newvoistatmaxid;
newstatdataidx = 0;
if (voi->flags & VOI_REQSTATE) {
/* Initialise the voistate stat in slot 0. */
tmpstat = BLOB_OFFSET(tpl_sb, voi->stats_off);
tmpstat->stype = VS_STYPE_VOISTATE;
tmpstat->flags = 0;
tmpstat->dtype = VSD_DTYPE_VOISTATE;
newstatdataidx = tmpstat->dsz =
sizeof(struct voistatdata_numeric);
tmpstat->data_off = tpl_sb->statsdata_off;
}
for (i = 0; (uint32_t)i < nvss; i++) {
tmpstat = BLOB_OFFSET(tpl_sb, voi->stats_off +
(vss[i].stype * sizeof(struct voistat)));
KASSERT(tmpstat->stype < 0, ("voistat %p "
"already initialised", tmpstat));
tmpstat->stype = vss[i].stype;
tmpstat->flags = vss[i].flags;
tmpstat->dtype = vss[i].vs_dtype;
tmpstat->dsz = vss[i].vsdsz;
tmpstat->data_off = tpl_sb->statsdata_off +
newstatdataidx;
memcpy(BLOB_OFFSET(tpl_sb, tmpstat->data_off),
vss[i].iv, vss[i].vsdsz);
newstatdataidx += vss[i].vsdsz;
}
/* Update the template version hash. */
stats_tpl_update_hash(tpllist[tpl_id]);
/* XXXLAS: Confirm tpl name/hash pair remains unique. */
}
} else
error = EINVAL;
TPL_LIST_WUNLOCK();
return (error);
}
struct statsblobv1 *
stats_v1_blob_alloc(uint32_t tpl_id, uint32_t flags __unused)
{
struct statsblobv1 *sb;
int error;
sb = NULL;
TPL_LIST_RLOCK();
if (tpl_id < ntpl) {
sb = stats_realloc(NULL, 0, tpllist[tpl_id]->sb->maxsz, 0);
if (sb != NULL) {
sb->maxsz = tpllist[tpl_id]->sb->maxsz;
error = stats_v1_blob_init_locked(sb, tpl_id, 0);
} else
error = ENOMEM;
if (error) {
stats_free(sb);
sb = NULL;
}
}
TPL_LIST_RUNLOCK();
return (sb);
}
void
stats_v1_blob_destroy(struct statsblobv1 *sb)
{
stats_free(sb);
}
int
stats_v1_voistat_fetch_dptr(struct statsblobv1 *sb, int32_t voi_id,
enum voi_stype stype, enum vsd_dtype *retdtype, struct voistatdata **retvsd,
size_t *retvsdsz)
{
struct voi *v;
struct voistat *vs;
if (retvsd == NULL || sb == NULL || sb->abi != STATS_ABI_V1 ||
voi_id >= NVOIS(sb))
return (EINVAL);
v = &sb->vois[voi_id];
if ((__typeof(v->voistatmaxid))stype > v->voistatmaxid)
return (EINVAL);
vs = BLOB_OFFSET(sb, v->stats_off + (stype * sizeof(struct voistat)));
*retvsd = BLOB_OFFSET(sb, vs->data_off);
if (retdtype != NULL)
*retdtype = vs->dtype;
if (retvsdsz != NULL)
*retvsdsz = vs->dsz;
return (0);
}
int
stats_v1_blob_init(struct statsblobv1 *sb, uint32_t tpl_id, uint32_t flags)
{
int error;
error = 0;
TPL_LIST_RLOCK();
if (sb == NULL || tpl_id >= ntpl) {
error = EINVAL;
} else {
error = stats_v1_blob_init_locked(sb, tpl_id, flags);
}
TPL_LIST_RUNLOCK();
return (error);
}
static inline int
stats_v1_blob_init_locked(struct statsblobv1 *sb, uint32_t tpl_id,
uint32_t flags __unused)
{
int error;
TPL_LIST_RLOCK_ASSERT();
error = (sb->maxsz >= tpllist[tpl_id]->sb->cursz) ? 0 : EOVERFLOW;
KASSERT(!error,
("sb %d instead of %d bytes", sb->maxsz, tpllist[tpl_id]->sb->cursz));
if (!error) {
memcpy(sb, tpllist[tpl_id]->sb, tpllist[tpl_id]->sb->cursz);
sb->created = sb->lastrst = stats_sbinuptime();
sb->tplhash = tpllist[tpl_id]->mb->tplhash;
}
return (error);
}
static int
stats_v1_blob_expand(struct statsblobv1 **sbpp, int newvoibytes,
int newvoistatbytes, int newvoistatdatabytes)
{
struct statsblobv1 *sb;
struct voi *tmpvoi;
struct voistat *tmpvoistat, *voistat_array;
int error, i, idxnewvois, idxnewvoistats, nbytes, nvoistats;
KASSERT(newvoibytes % sizeof(struct voi) == 0,
("Bad newvoibytes %d", newvoibytes));
KASSERT(newvoistatbytes % sizeof(struct voistat) == 0,
("Bad newvoistatbytes %d", newvoistatbytes));
error = ((newvoibytes % sizeof(struct voi) == 0) &&
(newvoistatbytes % sizeof(struct voistat) == 0)) ? 0 : EINVAL;
sb = *sbpp;
nbytes = newvoibytes + newvoistatbytes + newvoistatdatabytes;
/*
* XXXLAS: Required until we gain support for flags which alter the
* units of size/offset fields in key structs.
*/
if (!error && ((((int)sb->cursz) + nbytes) > SB_V1_MAXSZ))
error = EFBIG;
if (!error && (sb->cursz + nbytes > sb->maxsz)) {
/* Need to expand our blob. */
sb = stats_realloc(sb, sb->maxsz, sb->cursz + nbytes, M_ZERO);
if (sb != NULL) {
sb->maxsz = sb->cursz + nbytes;
*sbpp = sb;
} else
error = ENOMEM;
}
if (!error) {
/*
* Shuffle memory within the expanded blob working from the end
* backwards, leaving gaps for the new voistat and voistatdata
* structs at the beginning of their respective blob regions,
* and for the new voi structs at the end of their blob region.
*/
memmove(BLOB_OFFSET(sb, sb->statsdata_off + nbytes),
BLOB_OFFSET(sb, sb->statsdata_off),
sb->cursz - sb->statsdata_off);
memmove(BLOB_OFFSET(sb, sb->stats_off + newvoibytes +
newvoistatbytes), BLOB_OFFSET(sb, sb->stats_off),
sb->statsdata_off - sb->stats_off);
/* First index of new voi/voistat structs to be initialised. */
idxnewvois = NVOIS(sb);
idxnewvoistats = (newvoistatbytes / sizeof(struct voistat)) - 1;
/* Update housekeeping variables and offsets. */
sb->cursz += nbytes;
sb->stats_off += newvoibytes;
sb->statsdata_off += newvoibytes + newvoistatbytes;
/* XXXLAS: Zeroing not strictly needed but aids debugging. */
memset(&sb->vois[idxnewvois], '\0', newvoibytes);
memset(BLOB_OFFSET(sb, sb->stats_off), '\0',
newvoistatbytes);
memset(BLOB_OFFSET(sb, sb->statsdata_off), '\0',
newvoistatdatabytes);
/* Initialise new voi array members and update offsets. */
for (i = 0; i < NVOIS(sb); i++) {
tmpvoi = &sb->vois[i];
if (i >= idxnewvois) {
tmpvoi->id = tmpvoi->voistatmaxid = -1;
} else if (tmpvoi->id > -1) {
tmpvoi->stats_off += newvoibytes +
newvoistatbytes;
}
}
/* Initialise new voistat array members and update offsets. */
nvoistats = (sb->statsdata_off - sb->stats_off) /
sizeof(struct voistat);
voistat_array = BLOB_OFFSET(sb, sb->stats_off);
for (i = 0; i < nvoistats; i++) {
tmpvoistat = &voistat_array[i];
if (i <= idxnewvoistats) {
tmpvoistat->stype = -1;
} else if (tmpvoistat->stype > -1) {
tmpvoistat->data_off += nbytes;
}
}
}
return (error);
}
static void
stats_v1_blob_finalise(struct statsblobv1 *sb __unused)
{
/* XXXLAS: Fill this in. */
}
static void
stats_v1_blob_iter(struct statsblobv1 *sb, stats_v1_blob_itercb_t icb,
void *usrctx, uint32_t flags)
{
struct voi *v;
struct voistat *vs;
struct sb_iter_ctx ctx;
int i, j, firstvoi;
ctx.usrctx = usrctx;
ctx.flags = SB_IT_FIRST_CB;
firstvoi = 1;
for (i = 0; i < NVOIS(sb); i++) {
v = &sb->vois[i];
ctx.vslot = i;
ctx.vsslot = -1;
ctx.flags |= SB_IT_FIRST_VOISTAT;
if (firstvoi)
ctx.flags |= SB_IT_FIRST_VOI;
else if (i == (NVOIS(sb) - 1))
ctx.flags |= SB_IT_LAST_VOI | SB_IT_LAST_CB;
if (v->id < 0 && (flags & SB_IT_NULLVOI)) {
if (icb(sb, v, NULL, &ctx))
return;
firstvoi = 0;
ctx.flags &= ~SB_IT_FIRST_CB;
}
/* If NULL voi, v->voistatmaxid == -1 */
for (j = 0; j <= v->voistatmaxid; j++) {
vs = &((struct voistat *)BLOB_OFFSET(sb,
v->stats_off))[j];
if (vs->stype < 0 &&
!(flags & SB_IT_NULLVOISTAT))
continue;
if (j == v->voistatmaxid) {
ctx.flags |= SB_IT_LAST_VOISTAT;
if (i == (NVOIS(sb) - 1))
ctx.flags |=
SB_IT_LAST_CB;
} else
ctx.flags &= ~SB_IT_LAST_CB;
ctx.vsslot = j;
if (icb(sb, v, vs, &ctx))
return;
ctx.flags &= ~(SB_IT_FIRST_CB | SB_IT_FIRST_VOISTAT |
SB_IT_LAST_VOISTAT);
}
ctx.flags &= ~(SB_IT_FIRST_VOI | SB_IT_LAST_VOI);
}
}
static inline void
stats_voistatdata_tdgst_tostr(enum vsd_dtype voi_dtype __unused,
const struct voistatdata_tdgst *tdgst, enum vsd_dtype tdgst_dtype,
size_t tdgst_dsz __unused, enum sb_str_fmt fmt, struct sbuf *buf, int objdump)
{
const struct ctdth32 *ctd32tree;
const struct ctdth64 *ctd64tree;
const struct voistatdata_tdgstctd32 *ctd32;
const struct voistatdata_tdgstctd64 *ctd64;
const char *fmtstr;
uint64_t smplcnt, compcnt;
int is32bit, qmaxstrlen;
uint16_t maxctds, curctds;
switch (tdgst_dtype) {
case VSD_DTYPE_TDGSTCLUST32:
smplcnt = CONSTVSD(tdgstclust32, tdgst)->smplcnt;
compcnt = CONSTVSD(tdgstclust32, tdgst)->compcnt;
maxctds = ARB_MAXNODES(&CONSTVSD(tdgstclust32, tdgst)->ctdtree);
curctds = ARB_CURNODES(&CONSTVSD(tdgstclust32, tdgst)->ctdtree);
ctd32tree = &CONSTVSD(tdgstclust32, tdgst)->ctdtree;
ctd32 = (objdump ? ARB_CNODE(ctd32tree, 0) :
ARB_CMIN(ctdth32, ctd32tree));
qmaxstrlen = (ctd32 == NULL) ? 1 : Q_MAXSTRLEN(ctd32->mu, 10);
is32bit = 1;
ctd64tree = NULL;
ctd64 = NULL;
break;
case VSD_DTYPE_TDGSTCLUST64:
smplcnt = CONSTVSD(tdgstclust64, tdgst)->smplcnt;
compcnt = CONSTVSD(tdgstclust64, tdgst)->compcnt;
maxctds = ARB_MAXNODES(&CONSTVSD(tdgstclust64, tdgst)->ctdtree);
curctds = ARB_CURNODES(&CONSTVSD(tdgstclust64, tdgst)->ctdtree);
ctd64tree = &CONSTVSD(tdgstclust64, tdgst)->ctdtree;
ctd64 = (objdump ? ARB_CNODE(ctd64tree, 0) :
ARB_CMIN(ctdth64, ctd64tree));
qmaxstrlen = (ctd64 == NULL) ? 1 : Q_MAXSTRLEN(ctd64->mu, 10);
is32bit = 0;
ctd32tree = NULL;
ctd32 = NULL;
break;
default:
return;
}
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "smplcnt=%ju, compcnt=%ju, maxctds=%hu, nctds=%hu";
break;
case SB_STRFMT_JSON:
default:
fmtstr =
"\"smplcnt\":%ju,\"compcnt\":%ju,\"maxctds\":%hu,"
"\"nctds\":%hu,\"ctds\":[";
break;
}
sbuf_printf(buf, fmtstr, (uintmax_t)smplcnt, (uintmax_t)compcnt,
maxctds, curctds);
while ((is32bit ? NULL != ctd32 : NULL != ctd64)) {
char qstr[qmaxstrlen];
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "\n\t\t\t\t";
break;
case SB_STRFMT_JSON:
default:
fmtstr = "{";
break;
}
sbuf_cat(buf, fmtstr);
if (objdump) {
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "ctd[%hu].";
break;
case SB_STRFMT_JSON:
default:
fmtstr = "\"ctd\":%hu,";
break;
}
sbuf_printf(buf, fmtstr, is32bit ?
ARB_SELFIDX(ctd32tree, ctd32) :
ARB_SELFIDX(ctd64tree, ctd64));
}
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "{mu=";
break;
case SB_STRFMT_JSON:
default:
fmtstr = "\"mu\":";
break;
}
sbuf_cat(buf, fmtstr);
Q_TOSTR((is32bit ? ctd32->mu : ctd64->mu), -1, 10, qstr,
sizeof(qstr));
sbuf_cat(buf, qstr);
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = is32bit ? ",cnt=%u}" : ",cnt=%ju}";
break;
case SB_STRFMT_JSON:
default:
fmtstr = is32bit ? ",\"cnt\":%u}" : ",\"cnt\":%ju}";
break;
}
sbuf_printf(buf, fmtstr,
is32bit ? ctd32->cnt : (uintmax_t)ctd64->cnt);
if (is32bit)
ctd32 = (objdump ? ARB_CNODE(ctd32tree,
ARB_SELFIDX(ctd32tree, ctd32) + 1) :
ARB_CNEXT(ctdth32, ctd32tree, ctd32));
else
ctd64 = (objdump ? ARB_CNODE(ctd64tree,
ARB_SELFIDX(ctd64tree, ctd64) + 1) :
ARB_CNEXT(ctdth64, ctd64tree, ctd64));
if (fmt == SB_STRFMT_JSON &&
(is32bit ? NULL != ctd32 : NULL != ctd64))
sbuf_putc(buf, ',');
}
if (fmt == SB_STRFMT_JSON)
sbuf_cat(buf, "]");
}
static inline void
stats_voistatdata_hist_tostr(enum vsd_dtype voi_dtype,
const struct voistatdata_hist *hist, enum vsd_dtype hist_dtype,
size_t hist_dsz, enum sb_str_fmt fmt, struct sbuf *buf, int objdump)
{
const struct voistatdata_numeric *bkt_lb, *bkt_ub;
const char *fmtstr;
int is32bit;
uint16_t i, nbkts;
switch (hist_dtype) {
case VSD_DTYPE_CRHIST32:
nbkts = HIST_VSDSZ2NBKTS(crhist32, hist_dsz);
is32bit = 1;
break;
case VSD_DTYPE_DRHIST32:
nbkts = HIST_VSDSZ2NBKTS(drhist32, hist_dsz);
is32bit = 1;
break;
case VSD_DTYPE_DVHIST32:
nbkts = HIST_VSDSZ2NBKTS(dvhist32, hist_dsz);
is32bit = 1;
break;
case VSD_DTYPE_CRHIST64:
nbkts = HIST_VSDSZ2NBKTS(crhist64, hist_dsz);
is32bit = 0;
break;
case VSD_DTYPE_DRHIST64:
nbkts = HIST_VSDSZ2NBKTS(drhist64, hist_dsz);
is32bit = 0;
break;
case VSD_DTYPE_DVHIST64:
nbkts = HIST_VSDSZ2NBKTS(dvhist64, hist_dsz);
is32bit = 0;
break;
default:
return;
}
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "nbkts=%hu, ";
break;
case SB_STRFMT_JSON:
default:
fmtstr = "\"nbkts\":%hu,";
break;
}
sbuf_printf(buf, fmtstr, nbkts);
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = (is32bit ? "oob=%u" : "oob=%ju");
break;
case SB_STRFMT_JSON:
default:
fmtstr = (is32bit ? "\"oob\":%u,\"bkts\":[" :
"\"oob\":%ju,\"bkts\":[");
break;
}
sbuf_printf(buf, fmtstr, is32bit ? VSD_CONSTHIST_FIELDVAL(hist,
hist_dtype, oob) : (uintmax_t)VSD_CONSTHIST_FIELDVAL(hist,
hist_dtype, oob));
for (i = 0; i < nbkts; i++) {
switch (hist_dtype) {
case VSD_DTYPE_CRHIST32:
case VSD_DTYPE_CRHIST64:
bkt_lb = VSD_CONSTCRHIST_FIELDPTR(hist, hist_dtype,
bkts[i].lb);
if (i < nbkts - 1)
bkt_ub = VSD_CONSTCRHIST_FIELDPTR(hist,
hist_dtype, bkts[i + 1].lb);
else
bkt_ub = &numeric_limits[LIM_MAX][voi_dtype];
break;
case VSD_DTYPE_DRHIST32:
case VSD_DTYPE_DRHIST64:
bkt_lb = VSD_CONSTDRHIST_FIELDPTR(hist, hist_dtype,
bkts[i].lb);
bkt_ub = VSD_CONSTDRHIST_FIELDPTR(hist, hist_dtype,
bkts[i].ub);
break;
case VSD_DTYPE_DVHIST32:
case VSD_DTYPE_DVHIST64:
bkt_lb = bkt_ub = VSD_CONSTDVHIST_FIELDPTR(hist,
hist_dtype, bkts[i].val);
break;
default:
break;
}
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "\n\t\t\t\t";
break;
case SB_STRFMT_JSON:
default:
fmtstr = "{";
break;
}
sbuf_cat(buf, fmtstr);
if (objdump) {
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "bkt[%hu].";
break;
case SB_STRFMT_JSON:
default:
fmtstr = "\"bkt\":%hu,";
break;
}
sbuf_printf(buf, fmtstr, i);
}
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "{lb=";
break;
case SB_STRFMT_JSON:
default:
fmtstr = "\"lb\":";
break;
}
sbuf_cat(buf, fmtstr);
stats_voistatdata_tostr((const struct voistatdata *)bkt_lb,
voi_dtype, voi_dtype, sizeof(struct voistatdata_numeric),
fmt, buf, objdump);
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = ",ub=";
break;
case SB_STRFMT_JSON:
default:
fmtstr = ",\"ub\":";
break;
}
sbuf_cat(buf, fmtstr);
stats_voistatdata_tostr((const struct voistatdata *)bkt_ub,
voi_dtype, voi_dtype, sizeof(struct voistatdata_numeric),
fmt, buf, objdump);
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = is32bit ? ",cnt=%u}" : ",cnt=%ju}";
break;
case SB_STRFMT_JSON:
default:
fmtstr = is32bit ? ",\"cnt\":%u}" : ",\"cnt\":%ju}";
break;
}
sbuf_printf(buf, fmtstr, is32bit ?
VSD_CONSTHIST_FIELDVAL(hist, hist_dtype, bkts[i].cnt) :
(uintmax_t)VSD_CONSTHIST_FIELDVAL(hist, hist_dtype,
bkts[i].cnt));
if (fmt == SB_STRFMT_JSON && i < nbkts - 1)
sbuf_putc(buf, ',');
}
if (fmt == SB_STRFMT_JSON)
sbuf_cat(buf, "]");
}
int
stats_voistatdata_tostr(const struct voistatdata *vsd, enum vsd_dtype voi_dtype,
enum vsd_dtype vsd_dtype, size_t vsd_sz, enum sb_str_fmt fmt,
struct sbuf *buf, int objdump)
{
const char *fmtstr;
if (vsd == NULL || buf == NULL || voi_dtype >= VSD_NUM_DTYPES ||
vsd_dtype >= VSD_NUM_DTYPES || fmt >= SB_STRFMT_NUM_FMTS)
return (EINVAL);
switch (vsd_dtype) {
case VSD_DTYPE_VOISTATE:
switch (fmt) {
case SB_STRFMT_FREEFORM:
fmtstr = "prev=";
break;
case SB_STRFMT_JSON:
default:
fmtstr = "\"prev\":";
break;
}
sbuf_cat(buf, fmtstr);
/*
* Render prev by passing it as *vsd and voi_dtype as vsd_dtype.
*/
stats_voistatdata_tostr(
(const struct voistatdata *)&CONSTVSD(voistate, vsd)->prev,
voi_dtype, voi_dtype, vsd_sz, fmt, buf, objdump);
break;
case VSD_DTYPE_INT_S32:
sbuf_printf(buf, "%d", vsd->int32.s32);
break;
case VSD_DTYPE_INT_U32:
sbuf_printf(buf, "%u", vsd->int32.u32);
break;
case VSD_DTYPE_INT_S64:
sbuf_printf(buf, "%jd", (intmax_t)vsd->int64.s64);
break;
case VSD_DTYPE_INT_U64:
sbuf_printf(buf, "%ju", (uintmax_t)vsd->int64.u64);
break;
case VSD_DTYPE_INT_SLONG:
sbuf_printf(buf, "%ld", vsd->intlong.slong);
break;
case VSD_DTYPE_INT_ULONG:
sbuf_printf(buf, "%lu", vsd->intlong.ulong);
break;
case VSD_DTYPE_Q_S32:
{
char qstr[Q_MAXSTRLEN(vsd->q32.sq32, 10)];
Q_TOSTR((s32q_t)vsd->q32.sq32, -1, 10, qstr, sizeof(qstr));
sbuf_cat(buf, qstr);
}
break;
case VSD_DTYPE_Q_U32:
{
char qstr[Q_MAXSTRLEN(vsd->q32.uq32, 10)];
Q_TOSTR((u32q_t)vsd->q32.uq32, -1, 10, qstr, sizeof(qstr));
sbuf_cat(buf, qstr);
}
break;
case VSD_DTYPE_Q_S64:
{
char qstr[Q_MAXSTRLEN(vsd->q64.sq64, 10)];
Q_TOSTR((s64q_t)vsd->q64.sq64, -1, 10, qstr, sizeof(qstr));
sbuf_cat(buf, qstr);
}
break;
case VSD_DTYPE_Q_U64:
{
char qstr[Q_MAXSTRLEN(vsd->q64.uq64, 10)];
Q_TOSTR((u64q_t)vsd->q64.uq64, -1, 10, qstr, sizeof(qstr));
sbuf_cat(buf, qstr);
}
break;
case VSD_DTYPE_CRHIST32:
case VSD_DTYPE_DRHIST32:
case VSD_DTYPE_DVHIST32:
case VSD_DTYPE_CRHIST64:
case VSD_DTYPE_DRHIST64:
case VSD_DTYPE_DVHIST64:
stats_voistatdata_hist_tostr(voi_dtype, CONSTVSD(hist, vsd),
vsd_dtype, vsd_sz, fmt, buf, objdump);
break;
case VSD_DTYPE_TDGSTCLUST32:
case VSD_DTYPE_TDGSTCLUST64:
stats_voistatdata_tdgst_tostr(voi_dtype,
CONSTVSD(tdgst, vsd), vsd_dtype, vsd_sz, fmt, buf,
objdump);
break;
default:
break;
}
return (sbuf_error(buf));
}
static void
stats_v1_itercb_tostr_freeform(struct statsblobv1 *sb, struct voi *v,
struct voistat *vs, struct sb_iter_ctx *ctx)
{
struct sb_tostrcb_ctx *sctx;
struct metablob *tpl_mb;
struct sbuf *buf;
void *vsd;
uint8_t dump;
sctx = ctx->usrctx;
buf = sctx->buf;
tpl_mb = sctx->tpl ? sctx->tpl->mb : NULL;
dump = ((sctx->flags & SB_TOSTR_OBJDUMP) != 0);
if (ctx->flags & SB_IT_FIRST_CB) {
sbuf_printf(buf, "struct statsblobv1@%p", sb);
if (dump) {
sbuf_printf(buf, ", abi=%hhu, endian=%hhu, maxsz=%hu, "
"cursz=%hu, created=%jd, lastrst=%jd, flags=0x%04hx, "
"stats_off=%hu, statsdata_off=%hu",
sb->abi, sb->endian, sb->maxsz, sb->cursz,
sb->created, sb->lastrst, sb->flags, sb->stats_off,
sb->statsdata_off);
}
sbuf_printf(buf, ", tplhash=%u", sb->tplhash);
}
if (ctx->flags & SB_IT_FIRST_VOISTAT) {
sbuf_printf(buf, "\n\tvois[%hd]: id=%hd", ctx->vslot, v->id);
if (v->id < 0)
return;
sbuf_printf(buf, ", name=\"%s\"", (tpl_mb == NULL) ? "" :
tpl_mb->voi_meta[v->id].name);
if (dump)
sbuf_printf(buf, ", flags=0x%04hx, dtype=%s, "
"voistatmaxid=%hhd, stats_off=%hu", v->flags,
vsd_dtype2name[v->dtype], v->voistatmaxid, v->stats_off);
}
if (!dump && vs->stype <= 0)
return;
sbuf_printf(buf, "\n\t\tvois[%hd]stat[%hhd]: stype=", v->id, ctx->vsslot);
if (vs->stype < 0) {
sbuf_printf(buf, "%hhd", vs->stype);
return;
} else
sbuf_printf(buf, "%s, errs=%hu", vs_stype2name[vs->stype],
vs->errs);
vsd = BLOB_OFFSET(sb, vs->data_off);
if (dump)
sbuf_printf(buf, ", flags=0x%04x, dtype=%s, dsz=%hu, "
"data_off=%hu", vs->flags, vsd_dtype2name[vs->dtype],
vs->dsz, vs->data_off);
sbuf_cat(buf, "\n\t\t\tvoistatdata: ");
stats_voistatdata_tostr(vsd, v->dtype, vs->dtype, vs->dsz,
sctx->fmt, buf, dump);
}
static void
stats_v1_itercb_tostr_json(struct statsblobv1 *sb, struct voi *v, struct voistat *vs,
struct sb_iter_ctx *ctx)
{
struct sb_tostrcb_ctx *sctx;
struct metablob *tpl_mb;
struct sbuf *buf;
const char *fmtstr;
void *vsd;
uint8_t dump;
sctx = ctx->usrctx;
buf = sctx->buf;
tpl_mb = sctx->tpl ? sctx->tpl->mb : NULL;
dump = ((sctx->flags & SB_TOSTR_OBJDUMP) != 0);
if (ctx->flags & SB_IT_FIRST_CB) {
sbuf_putc(buf, '{');
if (dump) {
sbuf_printf(buf, "\"abi\":%hhu,\"endian\":%hhu,"
"\"maxsz\":%hu,\"cursz\":%hu,\"created\":%jd,"
"\"lastrst\":%jd,\"flags\":%hu,\"stats_off\":%hu,"
"\"statsdata_off\":%hu,", sb->abi,
sb->endian, sb->maxsz, sb->cursz, sb->created,
sb->lastrst, sb->flags, sb->stats_off,
sb->statsdata_off);
}
if (tpl_mb == NULL)
fmtstr = "\"tplname\":%s,\"tplhash\":%u,\"vois\":{";
else
fmtstr = "\"tplname\":\"%s\",\"tplhash\":%u,\"vois\":{";
sbuf_printf(buf, fmtstr, tpl_mb ? tpl_mb->tplname : "null",
sb->tplhash);
}
if (ctx->flags & SB_IT_FIRST_VOISTAT) {
if (dump) {
sbuf_printf(buf, "\"[%d]\":{\"id\":%d", ctx->vslot,
v->id);
if (v->id < 0) {
sbuf_cat(buf, "},");
return;
}
if (tpl_mb == NULL)
fmtstr = ",\"name\":%s,\"flags\":%hu,"
"\"dtype\":\"%s\",\"voistatmaxid\":%hhd,"
"\"stats_off\":%hu,";
else
fmtstr = ",\"name\":\"%s\",\"flags\":%hu,"
"\"dtype\":\"%s\",\"voistatmaxid\":%hhd,"
"\"stats_off\":%hu,";
sbuf_printf(buf, fmtstr, tpl_mb ?
tpl_mb->voi_meta[v->id].name : "null", v->flags,
vsd_dtype2name[v->dtype], v->voistatmaxid,
v->stats_off);
} else {
if (tpl_mb == NULL) {
sbuf_printf(buf, "\"[%hd]\":{", v->id);
} else {
sbuf_printf(buf, "\"%s\":{",
tpl_mb->voi_meta[v->id].name);
}
}
sbuf_cat(buf, "\"stats\":{");
}
vsd = BLOB_OFFSET(sb, vs->data_off);
if (dump) {
sbuf_printf(buf, "\"[%hhd]\":", ctx->vsslot);
if (vs->stype < 0) {
sbuf_cat(buf, "{\"stype\":-1},");
return;
}
sbuf_printf(buf, "{\"stype\":\"%s\",\"errs\":%hu,\"flags\":%hu,"
"\"dtype\":\"%s\",\"data_off\":%hu,\"voistatdata\":{",
vs_stype2name[vs->stype], vs->errs, vs->flags,
vsd_dtype2name[vs->dtype], vs->data_off);
} else if (vs->stype > 0) {
if (tpl_mb == NULL)
sbuf_printf(buf, "\"[%hhd]\":", vs->stype);
else
sbuf_printf(buf, "\"%s\":", vs_stype2name[vs->stype]);
} else
return;
if ((vs->flags & VS_VSDVALID) || dump) {
if (!dump)
sbuf_printf(buf, "{\"errs\":%hu,", vs->errs);
/* Simple non-compound VSD types need a key. */
if (!vsd_compoundtype[vs->dtype])
sbuf_cat(buf, "\"val\":");
stats_voistatdata_tostr(vsd, v->dtype, vs->dtype, vs->dsz,
sctx->fmt, buf, dump);
sbuf_cat(buf, dump ? "}}" : "}");
} else
sbuf_cat(buf, dump ? "null}" : "null");
if (ctx->flags & SB_IT_LAST_VOISTAT)
sbuf_cat(buf, "}}");
if (ctx->flags & SB_IT_LAST_CB)
sbuf_cat(buf, "}}");
else
sbuf_putc(buf, ',');
}
static int
stats_v1_itercb_tostr(struct statsblobv1 *sb, struct voi *v, struct voistat *vs,
struct sb_iter_ctx *ctx)
{
struct sb_tostrcb_ctx *sctx;
sctx = ctx->usrctx;
switch (sctx->fmt) {
case SB_STRFMT_FREEFORM:
stats_v1_itercb_tostr_freeform(sb, v, vs, ctx);
break;
case SB_STRFMT_JSON:
stats_v1_itercb_tostr_json(sb, v, vs, ctx);
break;
default:
break;
}
return (sbuf_error(sctx->buf));
}
int
stats_v1_blob_tostr(struct statsblobv1 *sb, struct sbuf *buf,
enum sb_str_fmt fmt, uint32_t flags)
{
struct sb_tostrcb_ctx sctx;
uint32_t iflags;
if (sb == NULL || sb->abi != STATS_ABI_V1 || buf == NULL ||
fmt >= SB_STRFMT_NUM_FMTS)
return (EINVAL);
sctx.buf = buf;
sctx.fmt = fmt;
sctx.flags = flags;
if (flags & SB_TOSTR_META) {
if (stats_tpl_fetch(stats_tpl_fetch_allocid(NULL, sb->tplhash),
&sctx.tpl))
return (EINVAL);
} else
sctx.tpl = NULL;
iflags = 0;
if (flags & SB_TOSTR_OBJDUMP)
iflags |= (SB_IT_NULLVOI | SB_IT_NULLVOISTAT);
stats_v1_blob_iter(sb, stats_v1_itercb_tostr, &sctx, iflags);
return (sbuf_error(buf));
}
static int
stats_v1_itercb_visit(struct statsblobv1 *sb, struct voi *v,
struct voistat *vs, struct sb_iter_ctx *ctx)
{
struct sb_visitcb_ctx *vctx;
struct sb_visit sbv;
vctx = ctx->usrctx;
sbv.tplhash = sb->tplhash;
sbv.voi_id = v->id;
sbv.voi_dtype = v->dtype;
sbv.vs_stype = vs->stype;
sbv.vs_dtype = vs->dtype;
sbv.vs_dsz = vs->dsz;
sbv.vs_data = BLOB_OFFSET(sb, vs->data_off);
sbv.vs_errs = vs->errs;
sbv.flags = ctx->flags & (SB_IT_FIRST_CB | SB_IT_LAST_CB |
SB_IT_FIRST_VOI | SB_IT_LAST_VOI | SB_IT_FIRST_VOISTAT |
SB_IT_LAST_VOISTAT);
return (vctx->cb(&sbv, vctx->usrctx));
}
int
stats_v1_blob_visit(struct statsblobv1 *sb, stats_blob_visitcb_t func,
void *usrctx)
{
struct sb_visitcb_ctx vctx;
if (sb == NULL || sb->abi != STATS_ABI_V1 || func == NULL)
return (EINVAL);
vctx.cb = func;
vctx.usrctx = usrctx;
stats_v1_blob_iter(sb, stats_v1_itercb_visit, &vctx, 0);
return (0);
}
static int
stats_v1_icb_reset_voistat(struct statsblobv1 *sb, struct voi *v __unused,
struct voistat *vs, struct sb_iter_ctx *ctx __unused)
{
void *vsd;
if (vs->stype == VS_STYPE_VOISTATE)
return (0);
vsd = BLOB_OFFSET(sb, vs->data_off);
/* Perform the stat type's default reset action. */
switch (vs->stype) {
case VS_STYPE_SUM:
switch (vs->dtype) {
case VSD_DTYPE_Q_S32:
Q_SIFVAL(VSD(q32, vsd)->sq32, 0);
break;
case VSD_DTYPE_Q_U32:
Q_SIFVAL(VSD(q32, vsd)->uq32, 0);
break;
case VSD_DTYPE_Q_S64:
Q_SIFVAL(VSD(q64, vsd)->sq64, 0);
break;
case VSD_DTYPE_Q_U64:
Q_SIFVAL(VSD(q64, vsd)->uq64, 0);
break;
default:
bzero(vsd, vs->dsz);
break;
}
break;
case VS_STYPE_MAX:
switch (vs->dtype) {
case VSD_DTYPE_Q_S32:
Q_SIFVAL(VSD(q32, vsd)->sq32,
Q_IFMINVAL(VSD(q32, vsd)->sq32));
break;
case VSD_DTYPE_Q_U32:
Q_SIFVAL(VSD(q32, vsd)->uq32,
Q_IFMINVAL(VSD(q32, vsd)->uq32));
break;
case VSD_DTYPE_Q_S64:
Q_SIFVAL(VSD(q64, vsd)->sq64,
Q_IFMINVAL(VSD(q64, vsd)->sq64));
break;
case VSD_DTYPE_Q_U64:
Q_SIFVAL(VSD(q64, vsd)->uq64,
Q_IFMINVAL(VSD(q64, vsd)->uq64));
break;
default:
memcpy(vsd, &numeric_limits[LIM_MIN][vs->dtype],
vs->dsz);
break;
}
break;
case VS_STYPE_MIN:
switch (vs->dtype) {
case VSD_DTYPE_Q_S32:
Q_SIFVAL(VSD(q32, vsd)->sq32,
Q_IFMAXVAL(VSD(q32, vsd)->sq32));
break;
case VSD_DTYPE_Q_U32:
Q_SIFVAL(VSD(q32, vsd)->uq32,
Q_IFMAXVAL(VSD(q32, vsd)->uq32));
break;
case VSD_DTYPE_Q_S64:
Q_SIFVAL(VSD(q64, vsd)->sq64,
Q_IFMAXVAL(VSD(q64, vsd)->sq64));
break;
case VSD_DTYPE_Q_U64:
Q_SIFVAL(VSD(q64, vsd)->uq64,
Q_IFMAXVAL(VSD(q64, vsd)->uq64));
break;
default:
memcpy(vsd, &numeric_limits[LIM_MAX][vs->dtype],
vs->dsz);
break;
}
break;
case VS_STYPE_HIST:
{
/* Reset bucket counts. */
struct voistatdata_hist *hist;
int i, is32bit;
uint16_t nbkts;
hist = VSD(hist, vsd);
switch (vs->dtype) {
case VSD_DTYPE_CRHIST32:
nbkts = HIST_VSDSZ2NBKTS(crhist32, vs->dsz);
is32bit = 1;
break;
case VSD_DTYPE_DRHIST32:
nbkts = HIST_VSDSZ2NBKTS(drhist32, vs->dsz);
is32bit = 1;
break;
case VSD_DTYPE_DVHIST32:
nbkts = HIST_VSDSZ2NBKTS(dvhist32, vs->dsz);
is32bit = 1;
break;
case VSD_DTYPE_CRHIST64:
nbkts = HIST_VSDSZ2NBKTS(crhist64, vs->dsz);
is32bit = 0;
break;
case VSD_DTYPE_DRHIST64:
nbkts = HIST_VSDSZ2NBKTS(drhist64, vs->dsz);
is32bit = 0;
break;
case VSD_DTYPE_DVHIST64:
nbkts = HIST_VSDSZ2NBKTS(dvhist64, vs->dsz);
is32bit = 0;
break;
default:
return (0);
}
bzero(VSD_HIST_FIELDPTR(hist, vs->dtype, oob),
is32bit ? sizeof(uint32_t) : sizeof(uint64_t));
for (i = nbkts - 1; i >= 0; i--) {
bzero(VSD_HIST_FIELDPTR(hist, vs->dtype,
bkts[i].cnt), is32bit ? sizeof(uint32_t) :
sizeof(uint64_t));
}
break;
}
case VS_STYPE_TDGST:
{
/* Reset sample count centroids array/tree. */
struct voistatdata_tdgst *tdgst;
struct ctdth32 *ctd32tree;
struct ctdth64 *ctd64tree;
struct voistatdata_tdgstctd32 *ctd32;
struct voistatdata_tdgstctd64 *ctd64;
tdgst = VSD(tdgst, vsd);
switch (vs->dtype) {
case VSD_DTYPE_TDGSTCLUST32:
VSD(tdgstclust32, tdgst)->smplcnt = 0;
VSD(tdgstclust32, tdgst)->compcnt = 0;
ctd32tree = &VSD(tdgstclust32, tdgst)->ctdtree;
ARB_INIT(ctd32, ctdlnk, ctd32tree,
ARB_MAXNODES(ctd32tree)) {
ctd32->cnt = 0;
Q_SIFVAL(ctd32->mu, 0);
}
#ifdef DIAGNOSTIC
RB_INIT(&VSD(tdgstclust32, tdgst)->rbctdtree);
#endif
break;
case VSD_DTYPE_TDGSTCLUST64:
VSD(tdgstclust64, tdgst)->smplcnt = 0;
VSD(tdgstclust64, tdgst)->compcnt = 0;
ctd64tree = &VSD(tdgstclust64, tdgst)->ctdtree;
ARB_INIT(ctd64, ctdlnk, ctd64tree,
ARB_MAXNODES(ctd64tree)) {
ctd64->cnt = 0;
Q_SIFVAL(ctd64->mu, 0);
}
#ifdef DIAGNOSTIC
RB_INIT(&VSD(tdgstclust64, tdgst)->rbctdtree);
#endif
break;
default:
return (0);
}
break;
}
default:
KASSERT(0, ("Unknown VOI stat type %d", vs->stype));
break;
}
vs->errs = 0;
vs->flags &= ~VS_VSDVALID;
return (0);
}
int
stats_v1_blob_snapshot(struct statsblobv1 **dst, size_t dstmaxsz,
struct statsblobv1 *src, uint32_t flags)
{
int error;
if (src != NULL && src->abi == STATS_ABI_V1) {
error = stats_v1_blob_clone(dst, dstmaxsz, src, flags);
if (!error) {
if (flags & SB_CLONE_RSTSRC) {
stats_v1_blob_iter(src,
stats_v1_icb_reset_voistat, NULL, 0);
src->lastrst = stats_sbinuptime();
}
stats_v1_blob_finalise(*dst);
}
} else
error = EINVAL;
return (error);
}
static inline int
stats_v1_voi_update_max(enum vsd_dtype voi_dtype __unused,
struct voistatdata *voival, struct voistat *vs, void *vsd)
{
int error;
KASSERT(vs->dtype < VSD_NUM_DTYPES,
("Unknown VSD dtype %d", vs->dtype));
error = 0;
switch (vs->dtype) {
case VSD_DTYPE_INT_S32:
if (VSD(int32, vsd)->s32 < voival->int32.s32) {
VSD(int32, vsd)->s32 = voival->int32.s32;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_U32:
if (VSD(int32, vsd)->u32 < voival->int32.u32) {
VSD(int32, vsd)->u32 = voival->int32.u32;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_S64:
if (VSD(int64, vsd)->s64 < voival->int64.s64) {
VSD(int64, vsd)->s64 = voival->int64.s64;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_U64:
if (VSD(int64, vsd)->u64 < voival->int64.u64) {
VSD(int64, vsd)->u64 = voival->int64.u64;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_SLONG:
if (VSD(intlong, vsd)->slong < voival->intlong.slong) {
VSD(intlong, vsd)->slong = voival->intlong.slong;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_ULONG:
if (VSD(intlong, vsd)->ulong < voival->intlong.ulong) {
VSD(intlong, vsd)->ulong = voival->intlong.ulong;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_Q_S32:
if (Q_QLTQ(VSD(q32, vsd)->sq32, voival->q32.sq32) &&
(0 == (error = Q_QCPYVALQ(&VSD(q32, vsd)->sq32,
voival->q32.sq32)))) {
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_Q_U32:
if (Q_QLTQ(VSD(q32, vsd)->uq32, voival->q32.uq32) &&
(0 == (error = Q_QCPYVALQ(&VSD(q32, vsd)->uq32,
voival->q32.uq32)))) {
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_Q_S64:
if (Q_QLTQ(VSD(q64, vsd)->sq64, voival->q64.sq64) &&
(0 == (error = Q_QCPYVALQ(&VSD(q64, vsd)->sq64,
voival->q64.sq64)))) {
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_Q_U64:
if (Q_QLTQ(VSD(q64, vsd)->uq64, voival->q64.uq64) &&
(0 == (error = Q_QCPYVALQ(&VSD(q64, vsd)->uq64,
voival->q64.uq64)))) {
vs->flags |= VS_VSDVALID;
}
break;
default:
error = EINVAL;
break;
}
return (error);
}
static inline int
stats_v1_voi_update_min(enum vsd_dtype voi_dtype __unused,
struct voistatdata *voival, struct voistat *vs, void *vsd)
{
int error;
KASSERT(vs->dtype < VSD_NUM_DTYPES,
("Unknown VSD dtype %d", vs->dtype));
error = 0;
switch (vs->dtype) {
case VSD_DTYPE_INT_S32:
if (VSD(int32, vsd)->s32 > voival->int32.s32) {
VSD(int32, vsd)->s32 = voival->int32.s32;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_U32:
if (VSD(int32, vsd)->u32 > voival->int32.u32) {
VSD(int32, vsd)->u32 = voival->int32.u32;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_S64:
if (VSD(int64, vsd)->s64 > voival->int64.s64) {
VSD(int64, vsd)->s64 = voival->int64.s64;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_U64:
if (VSD(int64, vsd)->u64 > voival->int64.u64) {
VSD(int64, vsd)->u64 = voival->int64.u64;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_SLONG:
if (VSD(intlong, vsd)->slong > voival->intlong.slong) {
VSD(intlong, vsd)->slong = voival->intlong.slong;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_INT_ULONG:
if (VSD(intlong, vsd)->ulong > voival->intlong.ulong) {
VSD(intlong, vsd)->ulong = voival->intlong.ulong;
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_Q_S32:
if (Q_QGTQ(VSD(q32, vsd)->sq32, voival->q32.sq32) &&
(0 == (error = Q_QCPYVALQ(&VSD(q32, vsd)->sq32,
voival->q32.sq32)))) {
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_Q_U32:
if (Q_QGTQ(VSD(q32, vsd)->uq32, voival->q32.uq32) &&
(0 == (error = Q_QCPYVALQ(&VSD(q32, vsd)->uq32,
voival->q32.uq32)))) {
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_Q_S64:
if (Q_QGTQ(VSD(q64, vsd)->sq64, voival->q64.sq64) &&
(0 == (error = Q_QCPYVALQ(&VSD(q64, vsd)->sq64,
voival->q64.sq64)))) {
vs->flags |= VS_VSDVALID;
}
break;
case VSD_DTYPE_Q_U64:
if (Q_QGTQ(VSD(q64, vsd)->uq64, voival->q64.uq64) &&
(0 == (error = Q_QCPYVALQ(&VSD(q64, vsd)->uq64,
voival->q64.uq64)))) {
vs->flags |= VS_VSDVALID;
}
break;
default:
error = EINVAL;
break;
}
return (error);
}
static inline int
stats_v1_voi_update_sum(enum vsd_dtype voi_dtype __unused,
struct voistatdata *voival, struct voistat *vs, void *vsd)
{
int error;
KASSERT(vs->dtype < VSD_NUM_DTYPES,
("Unknown VSD dtype %d", vs->dtype));
error = 0;
switch (vs->dtype) {
case VSD_DTYPE_INT_S32:
VSD(int32, vsd)->s32 += voival->int32.s32;
break;
case VSD_DTYPE_INT_U32:
VSD(int32, vsd)->u32 += voival->int32.u32;
break;
case VSD_DTYPE_INT_S64:
VSD(int64, vsd)->s64 += voival->int64.s64;
break;
case VSD_DTYPE_INT_U64:
VSD(int64, vsd)->u64 += voival->int64.u64;
break;
case VSD_DTYPE_INT_SLONG:
VSD(intlong, vsd)->slong += voival->intlong.slong;
break;
case VSD_DTYPE_INT_ULONG:
VSD(intlong, vsd)->ulong += voival->intlong.ulong;
break;
case VSD_DTYPE_Q_S32:
error = Q_QADDQ(&VSD(q32, vsd)->sq32, voival->q32.sq32);
break;
case VSD_DTYPE_Q_U32:
error = Q_QADDQ(&VSD(q32, vsd)->uq32, voival->q32.uq32);
break;
case VSD_DTYPE_Q_S64:
error = Q_QADDQ(&VSD(q64, vsd)->sq64, voival->q64.sq64);
break;
case VSD_DTYPE_Q_U64:
error = Q_QADDQ(&VSD(q64, vsd)->uq64, voival->q64.uq64);
break;
default:
error = EINVAL;
break;
}
if (!error)
vs->flags |= VS_VSDVALID;
return (error);
}
static inline int
stats_v1_voi_update_hist(enum vsd_dtype voi_dtype, struct voistatdata *voival,
struct voistat *vs, struct voistatdata_hist *hist)
{
struct voistatdata_numeric *bkt_lb, *bkt_ub;
uint64_t *oob64, *cnt64;
uint32_t *oob32, *cnt32;
int error, i, found, is32bit, has_ub, eq_only;
error = 0;
switch (vs->dtype) {
case VSD_DTYPE_CRHIST32:
i = HIST_VSDSZ2NBKTS(crhist32, vs->dsz);
is32bit = 1;
has_ub = eq_only = 0;
oob32 = &VSD(crhist32, hist)->oob;
break;
case VSD_DTYPE_DRHIST32:
i = HIST_VSDSZ2NBKTS(drhist32, vs->dsz);
is32bit = has_ub = 1;
eq_only = 0;
oob32 = &VSD(drhist32, hist)->oob;
break;
case VSD_DTYPE_DVHIST32:
i = HIST_VSDSZ2NBKTS(dvhist32, vs->dsz);
is32bit = eq_only = 1;
has_ub = 0;
oob32 = &VSD(dvhist32, hist)->oob;
break;
case VSD_DTYPE_CRHIST64:
i = HIST_VSDSZ2NBKTS(crhist64, vs->dsz);
is32bit = has_ub = eq_only = 0;
oob64 = &VSD(crhist64, hist)->oob;
break;
case VSD_DTYPE_DRHIST64:
i = HIST_VSDSZ2NBKTS(drhist64, vs->dsz);
is32bit = eq_only = 0;
has_ub = 1;
oob64 = &VSD(drhist64, hist)->oob;
break;
case VSD_DTYPE_DVHIST64:
i = HIST_VSDSZ2NBKTS(dvhist64, vs->dsz);
is32bit = has_ub = 0;
eq_only = 1;
oob64 = &VSD(dvhist64, hist)->oob;
break;
default:
return (EINVAL);
}
i--; /* Adjust for 0-based array index. */
/* XXXLAS: Should probably use a better bucket search algorithm. ARB? */
for (found = 0; i >= 0 && !found; i--) {
switch (vs->dtype) {
case VSD_DTYPE_CRHIST32:
bkt_lb = &VSD(crhist32, hist)->bkts[i].lb;
cnt32 = &VSD(crhist32, hist)->bkts[i].cnt;
break;
case VSD_DTYPE_DRHIST32:
bkt_lb = &VSD(drhist32, hist)->bkts[i].lb;
bkt_ub = &VSD(drhist32, hist)->bkts[i].ub;
cnt32 = &VSD(drhist32, hist)->bkts[i].cnt;
break;
case VSD_DTYPE_DVHIST32:
bkt_lb = &VSD(dvhist32, hist)->bkts[i].val;
cnt32 = &VSD(dvhist32, hist)->bkts[i].cnt;
break;
case VSD_DTYPE_CRHIST64:
bkt_lb = &VSD(crhist64, hist)->bkts[i].lb;
cnt64 = &VSD(crhist64, hist)->bkts[i].cnt;
break;
case VSD_DTYPE_DRHIST64:
bkt_lb = &VSD(drhist64, hist)->bkts[i].lb;
bkt_ub = &VSD(drhist64, hist)->bkts[i].ub;
cnt64 = &VSD(drhist64, hist)->bkts[i].cnt;
break;
case VSD_DTYPE_DVHIST64:
bkt_lb = &VSD(dvhist64, hist)->bkts[i].val;
cnt64 = &VSD(dvhist64, hist)->bkts[i].cnt;
break;
default:
return (EINVAL);
}
switch (voi_dtype) {
case VSD_DTYPE_INT_S32:
if (voival->int32.s32 >= bkt_lb->int32.s32) {
if ((eq_only && voival->int32.s32 ==
bkt_lb->int32.s32) ||
(!eq_only && (!has_ub ||
voival->int32.s32 < bkt_ub->int32.s32)))
found = 1;
}
break;
case VSD_DTYPE_INT_U32:
if (voival->int32.u32 >= bkt_lb->int32.u32) {
if ((eq_only && voival->int32.u32 ==
bkt_lb->int32.u32) ||
(!eq_only && (!has_ub ||
voival->int32.u32 < bkt_ub->int32.u32)))
found = 1;
}
break;
case VSD_DTYPE_INT_S64:
if (voival->int64.s64 >= bkt_lb->int64.s64)
if ((eq_only && voival->int64.s64 ==
bkt_lb->int64.s64) ||
(!eq_only && (!has_ub ||
voival->int64.s64 < bkt_ub->int64.s64)))
found = 1;
break;
case VSD_DTYPE_INT_U64:
if (voival->int64.u64 >= bkt_lb->int64.u64)
if ((eq_only && voival->int64.u64 ==
bkt_lb->int64.u64) ||
(!eq_only && (!has_ub ||
voival->int64.u64 < bkt_ub->int64.u64)))
found = 1;
break;
case VSD_DTYPE_INT_SLONG:
if (voival->intlong.slong >= bkt_lb->intlong.slong)
if ((eq_only && voival->intlong.slong ==
bkt_lb->intlong.slong) ||
(!eq_only && (!has_ub ||
voival->intlong.slong <
bkt_ub->intlong.slong)))
found = 1;
break;
case VSD_DTYPE_INT_ULONG:
if (voival->intlong.ulong >= bkt_lb->intlong.ulong)
if ((eq_only && voival->intlong.ulong ==
bkt_lb->intlong.ulong) ||
(!eq_only && (!has_ub ||
voival->intlong.ulong <
bkt_ub->intlong.ulong)))
found = 1;
break;
case VSD_DTYPE_Q_S32:
if (Q_QGEQ(voival->q32.sq32, bkt_lb->q32.sq32))
if ((eq_only && Q_QEQ(voival->q32.sq32,
bkt_lb->q32.sq32)) ||
(!eq_only && (!has_ub ||
Q_QLTQ(voival->q32.sq32,
bkt_ub->q32.sq32))))
found = 1;
break;
case VSD_DTYPE_Q_U32:
if (Q_QGEQ(voival->q32.uq32, bkt_lb->q32.uq32))
if ((eq_only && Q_QEQ(voival->q32.uq32,
bkt_lb->q32.uq32)) ||
(!eq_only && (!has_ub ||
Q_QLTQ(voival->q32.uq32,
bkt_ub->q32.uq32))))
found = 1;
break;
case VSD_DTYPE_Q_S64:
if (Q_QGEQ(voival->q64.sq64, bkt_lb->q64.sq64))
if ((eq_only && Q_QEQ(voival->q64.sq64,
bkt_lb->q64.sq64)) ||
(!eq_only && (!has_ub ||
Q_QLTQ(voival->q64.sq64,
bkt_ub->q64.sq64))))
found = 1;
break;
case VSD_DTYPE_Q_U64:
if (Q_QGEQ(voival->q64.uq64, bkt_lb->q64.uq64))
if ((eq_only && Q_QEQ(voival->q64.uq64,
bkt_lb->q64.uq64)) ||
(!eq_only && (!has_ub ||
Q_QLTQ(voival->q64.uq64,
bkt_ub->q64.uq64))))
found = 1;
break;
default:
break;
}
}
if (found) {
if (is32bit)
*cnt32 += 1;
else
*cnt64 += 1;
} else {
if (is32bit)
*oob32 += 1;
else
*oob64 += 1;
}
vs->flags |= VS_VSDVALID;
return (error);
}
static inline int
stats_v1_vsd_tdgst_compress(enum vsd_dtype vs_dtype,
struct voistatdata_tdgst *tdgst, int attempt)
{
struct ctdth32 *ctd32tree;
struct ctdth64 *ctd64tree;
struct voistatdata_tdgstctd32 *ctd32;
struct voistatdata_tdgstctd64 *ctd64;
uint64_t ebits, idxmask;
uint32_t bitsperidx, nebits;
int error, idx, is32bit, maxctds, remctds, tmperr;
error = 0;
switch (vs_dtype) {
case VSD_DTYPE_TDGSTCLUST32:
ctd32tree = &VSD(tdgstclust32, tdgst)->ctdtree;
if (!ARB_FULL(ctd32tree))
return (0);
VSD(tdgstclust32, tdgst)->compcnt++;
maxctds = remctds = ARB_MAXNODES(ctd32tree);
ARB_RESET_TREE(ctd32tree, ctdth32, maxctds);
VSD(tdgstclust32, tdgst)->smplcnt = 0;
is32bit = 1;
ctd64tree = NULL;
ctd64 = NULL;
#ifdef DIAGNOSTIC
RB_INIT(&VSD(tdgstclust32, tdgst)->rbctdtree);
#endif
break;
case VSD_DTYPE_TDGSTCLUST64:
ctd64tree = &VSD(tdgstclust64, tdgst)->ctdtree;
if (!ARB_FULL(ctd64tree))
return (0);
VSD(tdgstclust64, tdgst)->compcnt++;
maxctds = remctds = ARB_MAXNODES(ctd64tree);
ARB_RESET_TREE(ctd64tree, ctdth64, maxctds);
VSD(tdgstclust64, tdgst)->smplcnt = 0;
is32bit = 0;
ctd32tree = NULL;
ctd32 = NULL;
#ifdef DIAGNOSTIC
RB_INIT(&VSD(tdgstclust64, tdgst)->rbctdtree);
#endif
break;
default:
return (EINVAL);
}
/*
* Rebuild the t-digest ARB by pseudorandomly selecting centroids and
* re-inserting the mu/cnt of each as a value and corresponding weight.
*/
/*
* XXXCEM: random(9) is currently rand(3), not random(3). rand(3)
* RAND_MAX happens to be approximately 31 bits (range [0,
* 0x7ffffffd]), so the math kinda works out. When/if this portion of
* the code is compiled in userspace, it gets the random(3) behavior,
* which has expected range [0, 0x7fffffff].
*/
#define bitsperrand 31
ebits = 0;
nebits = 0;
bitsperidx = fls(maxctds);
KASSERT(bitsperidx <= sizeof(ebits) << 3,
("%s: bitsperidx=%d, ebits=%d",
__func__, bitsperidx, (int)(sizeof(ebits) << 3)));
idxmask = (UINT64_C(1) << bitsperidx) - 1;
/* Initialise the free list with randomised centroid indices. */
for (; remctds > 0; remctds--) {
while (nebits < bitsperidx) {
ebits |= ((uint64_t)random()) << nebits;
nebits += bitsperrand;
if (nebits > (sizeof(ebits) << 3))
nebits = sizeof(ebits) << 3;
}
idx = ebits & idxmask;
nebits -= bitsperidx;
ebits >>= bitsperidx;
/*
* Select the next centroid to put on the ARB free list. We
* start with the centroid at our randomly selected array index,
* and work our way forwards until finding one (the latter
* aspect reduces re-insertion randomness, but is good enough).
*/
do {
if (idx >= maxctds)
idx %= maxctds;
if (is32bit)
ctd32 = ARB_NODE(ctd32tree, idx);
else
ctd64 = ARB_NODE(ctd64tree, idx);
} while ((is32bit ? ARB_ISFREE(ctd32, ctdlnk) :
ARB_ISFREE(ctd64, ctdlnk)) && ++idx);
/* Put the centroid on the ARB free list. */
if (is32bit)
ARB_RETURNFREE(ctd32tree, ctd32, ctdlnk);
else
ARB_RETURNFREE(ctd64tree, ctd64, ctdlnk);
}
/*
* The free list now contains the randomised indices of every centroid.
* Walk the free list from start to end, re-inserting each centroid's
* mu/cnt. The tdgst_add() call may or may not consume the free centroid
* we re-insert values from during each loop iteration, so we must latch
* the index of the next free list centroid before the re-insertion
* call. The previous loop above should have left the centroid pointer
* pointing to the element at the head of the free list.
*/
KASSERT((is32bit ?
ARB_FREEIDX(ctd32tree) == ARB_SELFIDX(ctd32tree, ctd32) :
ARB_FREEIDX(ctd64tree) == ARB_SELFIDX(ctd64tree, ctd64)),
("%s: t-digest ARB@%p free list bug", __func__,
(is32bit ? (void *)ctd32tree : (void *)ctd64tree)));
remctds = maxctds;
while ((is32bit ? ctd32 != NULL : ctd64 != NULL)) {
tmperr = 0;
if (is32bit) {
s64q_t x;
idx = ARB_NEXTFREEIDX(ctd32, ctdlnk);
/* Cloning a s32q_t into a s64q_t should never fail. */
tmperr = Q_QCLONEQ(&x, ctd32->mu);
tmperr = tmperr ? tmperr : stats_v1_vsd_tdgst_add(
vs_dtype, tdgst, x, ctd32->cnt, attempt);
ctd32 = ARB_NODE(ctd32tree, idx);
KASSERT(ctd32 == NULL || ARB_ISFREE(ctd32, ctdlnk),
("%s: t-digest ARB@%p free list bug", __func__,
ctd32tree));
} else {
idx = ARB_NEXTFREEIDX(ctd64, ctdlnk);
tmperr = stats_v1_vsd_tdgst_add(vs_dtype, tdgst,
ctd64->mu, ctd64->cnt, attempt);
ctd64 = ARB_NODE(ctd64tree, idx);
KASSERT(ctd64 == NULL || ARB_ISFREE(ctd64, ctdlnk),
("%s: t-digest ARB@%p free list bug", __func__,
ctd64tree));
}
/*
* This process should not produce errors, bugs notwithstanding.
* Just in case, latch any errors and attempt all re-insertions.
*/
error = tmperr ? tmperr : error;
remctds--;
}
KASSERT(remctds == 0, ("%s: t-digest ARB@%p free list bug", __func__,
(is32bit ? (void *)ctd32tree : (void *)ctd64tree)));
return (error);
}
static inline int
stats_v1_vsd_tdgst_add(enum vsd_dtype vs_dtype, struct voistatdata_tdgst *tdgst,
s64q_t x, uint64_t weight, int attempt)
{
#ifdef DIAGNOSTIC
char qstr[Q_MAXSTRLEN(x, 10)];
#endif
struct ctdth32 *ctd32tree;
struct ctdth64 *ctd64tree;
void *closest, *cur, *lb, *ub;
struct voistatdata_tdgstctd32 *ctd32;
struct voistatdata_tdgstctd64 *ctd64;
uint64_t cnt, smplcnt, sum, tmpsum;
s64q_t k, minz, q, z;
int error, is32bit, n;
error = 0;
minz = Q_INI(&z, 0, 0, Q_NFBITS(x));
switch (vs_dtype) {
case VSD_DTYPE_TDGSTCLUST32:
if ((UINT32_MAX - weight) < VSD(tdgstclust32, tdgst)->smplcnt)
error = EOVERFLOW;
smplcnt = VSD(tdgstclust32, tdgst)->smplcnt;
ctd32tree = &VSD(tdgstclust32, tdgst)->ctdtree;
is32bit = 1;
ctd64tree = NULL;
ctd64 = NULL;
break;
case VSD_DTYPE_TDGSTCLUST64:
if ((UINT64_MAX - weight) < VSD(tdgstclust64, tdgst)->smplcnt)
error = EOVERFLOW;
smplcnt = VSD(tdgstclust64, tdgst)->smplcnt;
ctd64tree = &VSD(tdgstclust64, tdgst)->ctdtree;
is32bit = 0;
ctd32tree = NULL;
ctd32 = NULL;
break;
default:
error = EINVAL;
break;
}
if (error)
return (error);
/*
* Inspired by Ted Dunning's AVLTreeDigest.java
*/
do {
#if defined(DIAGNOSTIC)
KASSERT(attempt < 5,
("%s: Too many attempts", __func__));
#endif
if (attempt >= 5)
return (EAGAIN);
Q_SIFVAL(minz, Q_IFMAXVAL(minz));
closest = ub = NULL;
sum = tmpsum = 0;
if (is32bit)
lb = cur = (void *)(ctd32 = ARB_MIN(ctdth32, ctd32tree));
else
lb = cur = (void *)(ctd64 = ARB_MIN(ctdth64, ctd64tree));
if (lb == NULL) /* Empty tree. */
lb = (is32bit ? (void *)ARB_ROOT(ctd32tree) :
(void *)ARB_ROOT(ctd64tree));
/*
* Find the set of centroids with minimum distance to x and
* compute the sum of counts for all centroids with mean less
* than the first centroid in the set.
*/
for (; cur != NULL;
cur = (is32bit ?
(void *)(ctd32 = ARB_NEXT(ctdth32, ctd32tree, ctd32)) :
(void *)(ctd64 = ARB_NEXT(ctdth64, ctd64tree, ctd64)))) {
if (is32bit) {
cnt = ctd32->cnt;
KASSERT(Q_PRECEQ(ctd32->mu, x),
("%s: Q_RELPREC(mu,x)=%d", __func__,
Q_RELPREC(ctd32->mu, x)));
/* Ok to assign as both have same precision. */
z = ctd32->mu;
} else {
cnt = ctd64->cnt;
KASSERT(Q_PRECEQ(ctd64->mu, x),
("%s: Q_RELPREC(mu,x)=%d", __func__,
Q_RELPREC(ctd64->mu, x)));
/* Ok to assign as both have same precision. */
z = ctd64->mu;
}
error = Q_QSUBQ(&z, x);
#if defined(DIAGNOSTIC)
KASSERT(!error, ("%s: unexpected error %d", __func__,
error));
#endif
if (error)
return (error);
z = Q_QABS(z);
if (Q_QLTQ(z, minz)) {
minz = z;
lb = cur;
sum = tmpsum;
tmpsum += cnt;
} else if (Q_QGTQ(z, minz)) {
ub = cur;
break;
}
}
cur = (is32bit ?
(void *)(ctd32 = (struct voistatdata_tdgstctd32 *)lb) :
(void *)(ctd64 = (struct voistatdata_tdgstctd64 *)lb));
for (n = 0; cur != ub; cur = (is32bit ?
(void *)(ctd32 = ARB_NEXT(ctdth32, ctd32tree, ctd32)) :
(void *)(ctd64 = ARB_NEXT(ctdth64, ctd64tree, ctd64)))) {
if (is32bit)
cnt = ctd32->cnt;
else
cnt = ctd64->cnt;
q = Q_CTRLINI(16);
if (smplcnt == 1)
error = Q_QFRACI(&q, 1, 2);
else
/* [ sum + ((cnt - 1) / 2) ] / (smplcnt - 1) */
error = Q_QFRACI(&q, (sum << 1) + cnt - 1,
(smplcnt - 1) << 1);
k = q;
/* k = q x 4 x samplcnt x attempt */
error |= Q_QMULI(&k, 4 * smplcnt * attempt);
/* k = k x (1 - q) */
error |= Q_QSUBI(&q, 1);
q = Q_QABS(q);
error |= Q_QMULQ(&k, q);
#if defined(DIAGNOSTIC)
#if !defined(_KERNEL)
double q_dbl, k_dbl, q2d, k2d;
q2d = Q_Q2D(q);
k2d = Q_Q2D(k);
q_dbl = smplcnt == 1 ? 0.5 :
(sum + ((cnt - 1) / 2.0)) / (double)(smplcnt - 1);
k_dbl = 4 * smplcnt * q_dbl * (1.0 - q_dbl) * attempt;
/*
* If the difference between q and q_dbl is greater than
* the fractional precision of q, something is off.
* NB: q is holding the value of 1 - q
*/
q_dbl = 1.0 - q_dbl;
KASSERT((q_dbl > q2d ? q_dbl - q2d : q2d - q_dbl) <
(1.05 * ((double)1 / (double)(1ULL << Q_NFBITS(q)))),
("Q-type q bad precision"));
KASSERT((k_dbl > k2d ? k_dbl - k2d : k2d - k_dbl) <
1.0 + (0.01 * smplcnt),
("Q-type k bad precision"));
#endif /* !_KERNEL */
KASSERT(!error, ("%s: unexpected error %d", __func__,
error));
#endif /* DIAGNOSTIC */
if (error)
return (error);
if ((is32bit && ((ctd32->cnt + weight) <=
(uint64_t)Q_GIVAL(k))) ||
(!is32bit && ((ctd64->cnt + weight) <=
(uint64_t)Q_GIVAL(k)))) {
n++;
/* random() produces 31 bits. */
if (random() < (INT32_MAX / n))
closest = cur;
}
sum += cnt;
}
} while (closest == NULL &&
(is32bit ? ARB_FULL(ctd32tree) : ARB_FULL(ctd64tree)) &&
(error = stats_v1_vsd_tdgst_compress(vs_dtype, tdgst,
attempt++)) == 0);
if (error)
return (error);
if (closest != NULL) {
/* Merge with an existing centroid. */
if (is32bit) {
ctd32 = (struct voistatdata_tdgstctd32 *)closest;
error = Q_QSUBQ(&x, ctd32->mu);
/*
* The following calculation "x / (cnt + weight)"
* computes the amount by which to adjust the centroid's
* mu value in order to merge in the VOI sample.
*
* It can underflow (Q_QDIVI() returns ERANGE) when the
* user centroids' fractional precision (which is
* inherited by 'x') is too low to represent the result.
*
* A sophisticated approach to dealing with this issue
* would minimise accumulation of error by tracking
* underflow per centroid and making an adjustment when
* a LSB's worth of underflow has accumulated.
*
* A simpler approach is to let the result underflow
* i.e. merge the VOI sample into the centroid without
* adjusting the centroid's mu, and rely on the user to
* specify their t-digest with sufficient centroid
* fractional precision such that the accumulation of
* error from multiple underflows is of no material
* consequence to the centroid's final value of mu.
*
* For the moment, the latter approach is employed by
* simply ignoring ERANGE here.
*
* XXXLAS: Per-centroid underflow tracking is likely too
* onerous, but it probably makes sense to accumulate a
* single underflow error variable across all centroids
* and report it as part of the digest to provide
* additional visibility into the digest's fidelity.
*/
error = error ? error :
Q_QDIVI(&x, ctd32->cnt + weight);
if ((error && error != ERANGE)
|| (error = Q_QADDQ(&ctd32->mu, x))) {
#ifdef DIAGNOSTIC
KASSERT(!error, ("%s: unexpected error %d",
__func__, error));
#endif
return (error);
}
ctd32->cnt += weight;
error = ARB_REINSERT(ctdth32, ctd32tree, ctd32) ==
NULL ? 0 : EALREADY;
#ifdef DIAGNOSTIC
RB_REINSERT(rbctdth32,
&VSD(tdgstclust32, tdgst)->rbctdtree, ctd32);
#endif
} else {
ctd64 = (struct voistatdata_tdgstctd64 *)closest;
error = Q_QSUBQ(&x, ctd64->mu);
error = error ? error :
Q_QDIVI(&x, ctd64->cnt + weight);
/* Refer to is32bit ERANGE discussion above. */
if ((error && error != ERANGE)
|| (error = Q_QADDQ(&ctd64->mu, x))) {
KASSERT(!error, ("%s: unexpected error %d",
__func__, error));
return (error);
}
ctd64->cnt += weight;
error = ARB_REINSERT(ctdth64, ctd64tree, ctd64) ==
NULL ? 0 : EALREADY;
#ifdef DIAGNOSTIC
RB_REINSERT(rbctdth64,
&VSD(tdgstclust64, tdgst)->rbctdtree, ctd64);
#endif
}
} else {
/*
* Add a new centroid. If digest compression is working
* correctly, there should always be at least one free.
*/
if (is32bit) {
ctd32 = ARB_GETFREE(ctd32tree, ctdlnk);
#ifdef DIAGNOSTIC
KASSERT(ctd32 != NULL,
("%s: t-digest@%p has no free centroids",
__func__, tdgst));
#endif
if (ctd32 == NULL)
return (EAGAIN);
if ((error = Q_QCPYVALQ(&ctd32->mu, x)))
return (error);
ctd32->cnt = weight;
error = ARB_INSERT(ctdth32, ctd32tree, ctd32) == NULL ?
0 : EALREADY;
#ifdef DIAGNOSTIC
RB_INSERT(rbctdth32,
&VSD(tdgstclust32, tdgst)->rbctdtree, ctd32);
#endif
} else {
ctd64 = ARB_GETFREE(ctd64tree, ctdlnk);
#ifdef DIAGNOSTIC
KASSERT(ctd64 != NULL,
("%s: t-digest@%p has no free centroids",
__func__, tdgst));
#endif
if (ctd64 == NULL) /* Should not happen. */
return (EAGAIN);
/* Direct assignment ok as both have same type/prec. */
ctd64->mu = x;
ctd64->cnt = weight;
error = ARB_INSERT(ctdth64, ctd64tree, ctd64) == NULL ?
0 : EALREADY;
#ifdef DIAGNOSTIC
RB_INSERT(rbctdth64, &VSD(tdgstclust64,
tdgst)->rbctdtree, ctd64);
#endif
}
}
if (is32bit)
VSD(tdgstclust32, tdgst)->smplcnt += weight;
else {
VSD(tdgstclust64, tdgst)->smplcnt += weight;
#ifdef DIAGNOSTIC
struct rbctdth64 *rbctdtree =
&VSD(tdgstclust64, tdgst)->rbctdtree;
struct voistatdata_tdgstctd64 *rbctd64;
int i = 0;
ARB_FOREACH(ctd64, ctdth64, ctd64tree) {
rbctd64 = (i == 0 ? RB_MIN(rbctdth64, rbctdtree) :
RB_NEXT(rbctdth64, rbctdtree, rbctd64));
if (i >= ARB_CURNODES(ctd64tree)
|| ctd64 != rbctd64
|| ARB_MIN(ctdth64, ctd64tree) !=
RB_MIN(rbctdth64, rbctdtree)
|| ARB_MAX(ctdth64, ctd64tree) !=
RB_MAX(rbctdth64, rbctdtree)
|| ARB_LEFTIDX(ctd64, ctdlnk) !=
ARB_SELFIDX(ctd64tree, RB_LEFT(rbctd64, rblnk))
|| ARB_RIGHTIDX(ctd64, ctdlnk) !=
ARB_SELFIDX(ctd64tree, RB_RIGHT(rbctd64, rblnk))
|| ARB_PARENTIDX(ctd64, ctdlnk) !=
ARB_SELFIDX(ctd64tree,
RB_PARENT(rbctd64, rblnk))) {
Q_TOSTR(ctd64->mu, -1, 10, qstr, sizeof(qstr));
printf("ARB ctd=%3d p=%3d l=%3d r=%3d c=%2d "
"mu=%s\n",
(int)ARB_SELFIDX(ctd64tree, ctd64),
ARB_PARENTIDX(ctd64, ctdlnk),
ARB_LEFTIDX(ctd64, ctdlnk),
ARB_RIGHTIDX(ctd64, ctdlnk),
ARB_COLOR(ctd64, ctdlnk),
qstr);
Q_TOSTR(rbctd64->mu, -1, 10, qstr,
sizeof(qstr));
struct voistatdata_tdgstctd64 *parent;
parent = RB_PARENT(rbctd64, rblnk);
int rb_color =
parent == NULL ? 0 :
RB_LEFT(parent, rblnk) == rbctd64 ?
(_RB_BITSUP(parent, rblnk) & _RB_L) != 0 :
(_RB_BITSUP(parent, rblnk) & _RB_R) != 0;
printf(" RB ctd=%3d p=%3d l=%3d r=%3d c=%2d "
"mu=%s\n",
(int)ARB_SELFIDX(ctd64tree, rbctd64),
(int)ARB_SELFIDX(ctd64tree,
RB_PARENT(rbctd64, rblnk)),
(int)ARB_SELFIDX(ctd64tree,
RB_LEFT(rbctd64, rblnk)),
(int)ARB_SELFIDX(ctd64tree,
RB_RIGHT(rbctd64, rblnk)),
rb_color,
qstr);
panic("RB@%p and ARB@%p trees differ\n",
rbctdtree, ctd64tree);
}
i++;
}
#endif /* DIAGNOSTIC */
}
return (error);
}
static inline int
stats_v1_voi_update_tdgst(enum vsd_dtype voi_dtype, struct voistatdata *voival,
struct voistat *vs, struct voistatdata_tdgst *tdgst)
{
s64q_t x;
int error;
error = 0;
switch (vs->dtype) {
case VSD_DTYPE_TDGSTCLUST32:
/* Use same precision as the user's centroids. */
Q_INI(&x, 0, 0, Q_NFBITS(
ARB_CNODE(&VSD(tdgstclust32, tdgst)->ctdtree, 0)->mu));
break;
case VSD_DTYPE_TDGSTCLUST64:
/* Use same precision as the user's centroids. */
Q_INI(&x, 0, 0, Q_NFBITS(
ARB_CNODE(&VSD(tdgstclust64, tdgst)->ctdtree, 0)->mu));
break;
default:
KASSERT(vs->dtype == VSD_DTYPE_TDGSTCLUST32 ||
vs->dtype == VSD_DTYPE_TDGSTCLUST64,
("%s: vs->dtype(%d) != VSD_DTYPE_TDGSTCLUST<32|64>",
__func__, vs->dtype));
return (EINVAL);
}
/*
* XXXLAS: Should have both a signed and unsigned 'x' variable to avoid
* returning EOVERFLOW if the voival would have fit in a u64q_t.
*/
switch (voi_dtype) {
case VSD_DTYPE_INT_S32:
error = Q_QCPYVALI(&x, voival->int32.s32);
break;
case VSD_DTYPE_INT_U32:
error = Q_QCPYVALI(&x, voival->int32.u32);
break;
case VSD_DTYPE_INT_S64:
error = Q_QCPYVALI(&x, voival->int64.s64);
break;
case VSD_DTYPE_INT_U64:
error = Q_QCPYVALI(&x, voival->int64.u64);
break;
case VSD_DTYPE_INT_SLONG:
error = Q_QCPYVALI(&x, voival->intlong.slong);
break;
case VSD_DTYPE_INT_ULONG:
error = Q_QCPYVALI(&x, voival->intlong.ulong);
break;
case VSD_DTYPE_Q_S32:
error = Q_QCPYVALQ(&x, voival->q32.sq32);
break;
case VSD_DTYPE_Q_U32:
error = Q_QCPYVALQ(&x, voival->q32.uq32);
break;
case VSD_DTYPE_Q_S64:
error = Q_QCPYVALQ(&x, voival->q64.sq64);
break;
case VSD_DTYPE_Q_U64:
error = Q_QCPYVALQ(&x, voival->q64.uq64);
break;
default:
error = EINVAL;
break;
}
if (error ||
(error = stats_v1_vsd_tdgst_add(vs->dtype, tdgst, x, 1, 1)))
return (error);
vs->flags |= VS_VSDVALID;
return (0);
}
int
stats_v1_voi_update(struct statsblobv1 *sb, int32_t voi_id,
enum vsd_dtype voi_dtype, struct voistatdata *voival, uint32_t flags)
{
struct voi *v;
struct voistat *vs;
void *statevsd, *vsd;
int error, i, tmperr;
error = 0;
if (sb == NULL || sb->abi != STATS_ABI_V1 || voi_id >= NVOIS(sb) ||
voi_dtype == 0 || voi_dtype >= VSD_NUM_DTYPES || voival == NULL)
return (EINVAL);
v = &sb->vois[voi_id];
if (voi_dtype != v->dtype || v->id < 0 ||
((flags & SB_VOI_RELUPDATE) && !(v->flags & VOI_REQSTATE)))
return (EINVAL);
vs = BLOB_OFFSET(sb, v->stats_off);
if (v->flags & VOI_REQSTATE)
statevsd = BLOB_OFFSET(sb, vs->data_off);
else
statevsd = NULL;
if (flags & SB_VOI_RELUPDATE) {
switch (voi_dtype) {
case VSD_DTYPE_INT_S32:
voival->int32.s32 +=
VSD(voistate, statevsd)->prev.int32.s32;
break;
case VSD_DTYPE_INT_U32:
voival->int32.u32 +=
VSD(voistate, statevsd)->prev.int32.u32;
break;
case VSD_DTYPE_INT_S64:
voival->int64.s64 +=
VSD(voistate, statevsd)->prev.int64.s64;
break;
case VSD_DTYPE_INT_U64:
voival->int64.u64 +=
VSD(voistate, statevsd)->prev.int64.u64;
break;
case VSD_DTYPE_INT_SLONG:
voival->intlong.slong +=
VSD(voistate, statevsd)->prev.intlong.slong;
break;
case VSD_DTYPE_INT_ULONG:
voival->intlong.ulong +=
VSD(voistate, statevsd)->prev.intlong.ulong;
break;
case VSD_DTYPE_Q_S32:
error = Q_QADDQ(&voival->q32.sq32,
VSD(voistate, statevsd)->prev.q32.sq32);
break;
case VSD_DTYPE_Q_U32:
error = Q_QADDQ(&voival->q32.uq32,
VSD(voistate, statevsd)->prev.q32.uq32);
break;
case VSD_DTYPE_Q_S64:
error = Q_QADDQ(&voival->q64.sq64,
VSD(voistate, statevsd)->prev.q64.sq64);
break;
case VSD_DTYPE_Q_U64:
error = Q_QADDQ(&voival->q64.uq64,
VSD(voistate, statevsd)->prev.q64.uq64);
break;
default:
KASSERT(0, ("Unknown VOI data type %d", voi_dtype));
break;
}
}
if (error)
return (error);
for (i = v->voistatmaxid; i > 0; i--) {
vs = &((struct voistat *)BLOB_OFFSET(sb, v->stats_off))[i];
if (vs->stype < 0)
continue;
vsd = BLOB_OFFSET(sb, vs->data_off);
switch (vs->stype) {
case VS_STYPE_MAX:
tmperr = stats_v1_voi_update_max(voi_dtype, voival,
vs, vsd);
break;
case VS_STYPE_MIN:
tmperr = stats_v1_voi_update_min(voi_dtype, voival,
vs, vsd);
break;
case VS_STYPE_SUM:
tmperr = stats_v1_voi_update_sum(voi_dtype, voival,
vs, vsd);
break;
case VS_STYPE_HIST:
tmperr = stats_v1_voi_update_hist(voi_dtype, voival,
vs, vsd);
break;
case VS_STYPE_TDGST:
tmperr = stats_v1_voi_update_tdgst(voi_dtype, voival,
vs, vsd);
break;
default:
KASSERT(0, ("Unknown VOI stat type %d", vs->stype));
break;
}
if (tmperr) {
error = tmperr;
VS_INCERRS(vs);
}
}
if (statevsd) {
switch (voi_dtype) {
case VSD_DTYPE_INT_S32:
VSD(voistate, statevsd)->prev.int32.s32 =
voival->int32.s32;
break;
case VSD_DTYPE_INT_U32:
VSD(voistate, statevsd)->prev.int32.u32 =
voival->int32.u32;
break;
case VSD_DTYPE_INT_S64:
VSD(voistate, statevsd)->prev.int64.s64 =
voival->int64.s64;
break;
case VSD_DTYPE_INT_U64:
VSD(voistate, statevsd)->prev.int64.u64 =
voival->int64.u64;
break;
case VSD_DTYPE_INT_SLONG:
VSD(voistate, statevsd)->prev.intlong.slong =
voival->intlong.slong;
break;
case VSD_DTYPE_INT_ULONG:
VSD(voistate, statevsd)->prev.intlong.ulong =
voival->intlong.ulong;
break;
case VSD_DTYPE_Q_S32:
error = Q_QCPYVALQ(
&VSD(voistate, statevsd)->prev.q32.sq32,
voival->q32.sq32);
break;
case VSD_DTYPE_Q_U32:
error = Q_QCPYVALQ(
&VSD(voistate, statevsd)->prev.q32.uq32,
voival->q32.uq32);
break;
case VSD_DTYPE_Q_S64:
error = Q_QCPYVALQ(
&VSD(voistate, statevsd)->prev.q64.sq64,
voival->q64.sq64);
break;
case VSD_DTYPE_Q_U64:
error = Q_QCPYVALQ(
&VSD(voistate, statevsd)->prev.q64.uq64,
voival->q64.uq64);
break;
default:
KASSERT(0, ("Unknown VOI data type %d", voi_dtype));
break;
}
}
return (error);
}
#ifdef _KERNEL
static void
stats_init(void *arg)
{
}
SYSINIT(stats, SI_SUB_KDTRACE, SI_ORDER_FIRST, stats_init, NULL);
/*
* Sysctl handler to display the list of available stats templates.
*/
static int
stats_tpl_list_available(SYSCTL_HANDLER_ARGS)
{
struct sbuf *s;
int err, i;
err = 0;
/* We can tolerate ntpl being stale, so do not take the lock. */
s = sbuf_new(NULL, NULL, /* +1 per tpl for , */
ntpl * (STATS_TPL_MAX_STR_SPEC_LEN + 1), SBUF_FIXEDLEN);
if (s == NULL)
return (ENOMEM);
TPL_LIST_RLOCK();
for (i = 0; i < ntpl; i++) {
err = sbuf_printf(s, "%s\"%s\":%u", i ? "," : "",
tpllist[i]->mb->tplname, tpllist[i]->mb->tplhash);
if (err) {
/* Sbuf overflow condition. */
err = EOVERFLOW;
break;
}
}
TPL_LIST_RUNLOCK();
if (!err) {
sbuf_finish(s);
err = sysctl_handle_string(oidp, sbuf_data(s), 0, req);
}
sbuf_delete(s);
return (err);
}
/*
* Called by subsystem-specific sysctls to report and/or parse the list of
* templates being sampled and their sampling rates. A stats_tpl_sr_cb_t
* conformant function pointer must be passed in as arg1, which is used to
* interact with the subsystem's stats template sample rates list. If arg2 > 0,
* a zero-initialised allocation of arg2-sized contextual memory is
* heap-allocated and passed in to all subsystem callbacks made during the
* operation of stats_tpl_sample_rates().
*
* XXXLAS: Assumes templates are never removed, which is currently true but may
* need to be reworked in future if dynamic template management becomes a
* requirement e.g. to support kernel module based templates.
*/
int
stats_tpl_sample_rates(SYSCTL_HANDLER_ARGS)
{
char kvpair_fmt[16], tplspec_fmt[16];
char tpl_spec[STATS_TPL_MAX_STR_SPEC_LEN];
char tpl_name[TPL_MAX_NAME_LEN + 2]; /* +2 for "" */
stats_tpl_sr_cb_t subsys_cb;
void *subsys_ctx;
char *buf, *new_rates_usr_str, *tpl_name_p;
struct stats_tpl_sample_rate *rates;
struct sbuf *s, _s;
uint32_t cum_pct, pct, tpl_hash;
int err, i, off, len, newlen, nrates;
buf = NULL;
rates = NULL;
err = nrates = 0;
subsys_cb = (stats_tpl_sr_cb_t)arg1;
KASSERT(subsys_cb != NULL, ("%s: subsys_cb == arg1 == NULL", __func__));
if (arg2 > 0)
subsys_ctx = malloc(arg2, M_TEMP, M_WAITOK | M_ZERO);
else
subsys_ctx = NULL;
/* Grab current count of subsystem rates. */
err = subsys_cb(TPL_SR_UNLOCKED_GET, NULL, &nrates, subsys_ctx);
if (err)
goto done;
/* +1 to ensure we can append '\0' post copyin, +5 per rate for =nnn, */
len = max(req->newlen + 1, nrates * (STATS_TPL_MAX_STR_SPEC_LEN + 5));
if (req->oldptr != NULL || req->newptr != NULL)
buf = malloc(len, M_TEMP, M_WAITOK);
if (req->oldptr != NULL) {
if (nrates == 0) {
/* No rates, so return an empty string via oldptr. */
err = SYSCTL_OUT(req, "", 1);
if (err)
goto done;
goto process_new;
}
s = sbuf_new(&_s, buf, len, SBUF_FIXEDLEN | SBUF_INCLUDENUL);
/* Grab locked count of, and ptr to, subsystem rates. */
err = subsys_cb(TPL_SR_RLOCKED_GET, &rates, &nrates,
subsys_ctx);
if (err)
goto done;
TPL_LIST_RLOCK();
for (i = 0; i < nrates && !err; i++) {
err = sbuf_printf(s, "%s\"%s\":%u=%u", i ? "," : "",
tpllist[rates[i].tpl_slot_id]->mb->tplname,
tpllist[rates[i].tpl_slot_id]->mb->tplhash,
rates[i].tpl_sample_pct);
}
TPL_LIST_RUNLOCK();
/* Tell subsystem that we're done with its rates list. */
err = subsys_cb(TPL_SR_RUNLOCK, &rates, &nrates, subsys_ctx);
if (err)
goto done;
err = sbuf_finish(s);
if (err)
goto done; /* We lost a race for buf to be too small. */
/* Return the rendered string data via oldptr. */
err = SYSCTL_OUT(req, sbuf_data(s), sbuf_len(s));
} else {
/* Return the upper bound size for buffer sizing requests. */
err = SYSCTL_OUT(req, NULL, len);
}
process_new:
if (err || req->newptr == NULL)
goto done;
newlen = req->newlen - req->newidx;
err = SYSCTL_IN(req, buf, newlen);
if (err)
goto done;
/*
* Initialise format strings at run time.
*
* Write the max template spec string length into the
* template_spec=percent key-value pair parsing format string as:
* " %<width>[^=]=%u %n"
*
* Write the max template name string length into the tplname:tplhash
* parsing format string as:
* "%<width>[^:]:%u"
*
* Subtract 1 for \0 appended by sscanf().
*/
sprintf(kvpair_fmt, " %%%zu[^=]=%%u %%n", sizeof(tpl_spec) - 1);
sprintf(tplspec_fmt, "%%%zu[^:]:%%u", sizeof(tpl_name) - 1);
/*
* Parse each CSV key-value pair specifying a template and its sample
* percentage. Whitespace either side of a key-value pair is ignored.
* Templates can be specified by name, hash, or name and hash per the
* following formats (chars in [] are optional):
* ["]<tplname>["]=<percent>
* :hash=pct
* ["]<tplname>["]:hash=<percent>
*/
cum_pct = nrates = 0;
rates = NULL;
buf[newlen] = '\0'; /* buf is at least newlen+1 in size. */
new_rates_usr_str = buf;
while (isspace(*new_rates_usr_str))
new_rates_usr_str++; /* Skip leading whitespace. */
while (*new_rates_usr_str != '\0') {
tpl_name_p = tpl_name;
tpl_name[0] = '\0';
tpl_hash = 0;
off = 0;
/*
* Parse key-value pair which must perform 2 conversions, then
* parse the template spec to extract either name, hash, or name
* and hash depending on the three possible spec formats. The
* tplspec_fmt format specifier parses name or name and hash
* template specs, while the ":%u" format specifier parses
* hash-only template specs. If parsing is successfull, ensure
* the cumulative sampling percentage does not exceed 100.
*/
err = EINVAL;
if (2 != sscanf(new_rates_usr_str, kvpair_fmt, tpl_spec, &pct,
&off))
break;
if ((1 > sscanf(tpl_spec, tplspec_fmt, tpl_name, &tpl_hash)) &&
(1 != sscanf(tpl_spec, ":%u", &tpl_hash)))
break;
if ((cum_pct += pct) > 100)
break;
err = 0;
/* Strip surrounding "" from template name if present. */
len = strlen(tpl_name);
if (len > 0) {
if (tpl_name[len - 1] == '"')
tpl_name[--len] = '\0';
if (tpl_name[0] == '"') {
tpl_name_p++;
len--;
}
}
rates = stats_realloc(rates, 0, /* oldsz is unused in kernel. */
(nrates + 1) * sizeof(*rates), M_WAITOK);
rates[nrates].tpl_slot_id =
stats_tpl_fetch_allocid(len ? tpl_name_p : NULL, tpl_hash);
if (rates[nrates].tpl_slot_id < 0) {
err = -rates[nrates].tpl_slot_id;
break;
}
rates[nrates].tpl_sample_pct = pct;
nrates++;
new_rates_usr_str += off;
if (*new_rates_usr_str != ',')
break; /* End-of-input or malformed. */
new_rates_usr_str++; /* Move past comma to next pair. */
}
if (!err) {
if ((new_rates_usr_str - buf) < newlen) {
/* Entire input has not been consumed. */
err = EINVAL;
} else {
/*
* Give subsystem the new rates. They'll return the
* appropriate rates pointer for us to garbage collect.
*/
err = subsys_cb(TPL_SR_PUT, &rates, &nrates,
subsys_ctx);
}
}
stats_free(rates);
done:
free(buf, M_TEMP);
free(subsys_ctx, M_TEMP);
return (err);
}
SYSCTL_NODE(_kern, OID_AUTO, stats, CTLFLAG_RW | CTLFLAG_MPSAFE, NULL,
"stats(9) MIB");
SYSCTL_PROC(_kern_stats, OID_AUTO, templates,
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
stats_tpl_list_available, "A",
"list the name/hash of all available stats(9) templates");
#else /* ! _KERNEL */
static void __attribute__ ((constructor))
stats_constructor(void)
{
pthread_rwlock_init(&tpllistlock, NULL);
}
static void __attribute__ ((destructor))
stats_destructor(void)
{
pthread_rwlock_destroy(&tpllistlock);
}
#endif /* _KERNEL */
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