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![Pedro F. Giffuni](/assets/img/avatar_default.png)
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
490 lines
11 KiB
C
490 lines
11 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2003,2004 Joseph Koshy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/cpuset.h>
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#include <sys/sysctl.h>
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <pmc.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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/* Compile time defaults */
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#define PMCC_PRINT_USAGE 0
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#define PMCC_PRINT_EVENTS 1
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#define PMCC_LIST_STATE 2
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#define PMCC_ENABLE_DISABLE 3
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#define PMCC_SHOW_STATISTICS 4
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#define PMCC_CPU_ALL -1
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#define PMCC_CPU_WILDCARD '*'
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#define PMCC_PMC_ALL -1
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#define PMCC_PMC_WILDCARD '*'
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#define PMCC_OP_IGNORE 0
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#define PMCC_OP_DISABLE 1
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#define PMCC_OP_ENABLE 2
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#define PMCC_PROGRAM_NAME "pmccontrol"
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static STAILQ_HEAD(pmcc_op_list, pmcc_op) head = STAILQ_HEAD_INITIALIZER(head);
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struct pmcc_op {
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char op_cpu;
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char op_pmc;
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char op_op;
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STAILQ_ENTRY(pmcc_op) op_next;
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};
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/* Function Prototypes */
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#if DEBUG
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static void pmcc_init_debug(void);
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#endif
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static int pmcc_do_list_state(void);
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static int pmcc_do_enable_disable(struct pmcc_op_list *);
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static int pmcc_do_list_events(void);
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/* Globals */
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static char usage_message[] =
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"Usage:\n"
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" " PMCC_PROGRAM_NAME " -L\n"
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" " PMCC_PROGRAM_NAME " -l\n"
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" " PMCC_PROGRAM_NAME " -s\n"
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" " PMCC_PROGRAM_NAME " [-e pmc | -d pmc | -c cpu] ...";
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#if DEBUG
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static FILE *debug_stream = NULL;
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#endif
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#if DEBUG
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#define DEBUG_MSG(...) \
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(void) fprintf(debug_stream, "[pmccontrol] " __VA_ARGS__);
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#else
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#define DEBUG_MSG(m) /* */
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#endif /* !DEBUG */
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#if DEBUG
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/* log debug messages to a separate file */
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static void
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pmcc_init_debug(void)
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{
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char *fn;
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fn = getenv("PMCCONTROL_DEBUG");
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if (fn != NULL)
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{
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debug_stream = fopen(fn, "w");
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if (debug_stream == NULL)
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debug_stream = stderr;
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} else
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debug_stream = stderr;
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}
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#endif
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static int
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pmcc_do_enable_disable(struct pmcc_op_list *op_list)
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{
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int c, error, i, j, ncpu, npmc, t;
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struct pmcc_op *np;
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unsigned char *map;
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unsigned char op;
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int cpu, pmc;
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if ((ncpu = pmc_ncpu()) < 0)
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err(EX_OSERR, "Unable to determine the number of cpus");
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/* Determine the maximum number of PMCs in any CPU. */
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npmc = 0;
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for (c = 0; c < ncpu; c++) {
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if ((t = pmc_npmc(c)) < 0)
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err(EX_OSERR,
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"Unable to determine the number of PMCs in CPU %d",
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c);
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npmc = MAX(t, npmc);
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}
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if (npmc == 0)
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errx(EX_CONFIG, "No PMCs found");
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if ((map = calloc(npmc, ncpu)) == NULL)
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err(EX_SOFTWARE, "Out of memory");
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error = 0;
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STAILQ_FOREACH(np, op_list, op_next) {
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cpu = np->op_cpu;
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pmc = np->op_pmc;
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op = np->op_op;
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if (cpu >= ncpu)
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errx(EX_DATAERR, "CPU id too large: \"%d\"", cpu);
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if (pmc >= npmc)
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errx(EX_DATAERR, "PMC id too large: \"%d\"", pmc);
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#define MARKMAP(M,C,P,V) do { \
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*((M) + (C)*npmc + (P)) = (V); \
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} while (0)
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#define SET_PMCS(C,P,V) do { \
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if ((P) == PMCC_PMC_ALL) { \
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for (j = 0; j < npmc; j++) \
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MARKMAP(map, (C), j, (V)); \
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} else \
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MARKMAP(map, (C), (P), (V)); \
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} while (0)
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#define MAP(M,C,P) (*((M) + (C)*npmc + (P)))
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if (cpu == PMCC_CPU_ALL)
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for (i = 0; i < ncpu; i++) {
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SET_PMCS(i, pmc, op);
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}
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else
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SET_PMCS(cpu, pmc, op);
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}
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/* Configure PMCS */
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for (i = 0; i < ncpu; i++)
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for (j = 0; j < npmc; j++) {
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unsigned char b;
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b = MAP(map, i, j);
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error = 0;
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if (b == PMCC_OP_ENABLE)
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error = pmc_enable(i, j);
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else if (b == PMCC_OP_DISABLE)
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error = pmc_disable(i, j);
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if (error < 0)
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err(EX_OSERR, "%s of PMC %d on CPU %d failed",
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b == PMCC_OP_ENABLE ? "Enable" : "Disable",
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j, i);
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}
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return error;
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}
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static int
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pmcc_do_list_state(void)
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{
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cpuset_t logical_cpus_mask;
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long cpusetsize;
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size_t setsize;
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int c, cpu, n, npmc, ncpu;
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struct pmc_info *pd;
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struct pmc_pmcinfo *pi;
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const struct pmc_cpuinfo *pc;
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if (pmc_cpuinfo(&pc) != 0)
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err(EX_OSERR, "Unable to determine CPU information");
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printf("%d %s CPUs present, with %d PMCs per CPU\n", pc->pm_ncpu,
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pmc_name_of_cputype(pc->pm_cputype),
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pc->pm_npmc);
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/* Determine the set of logical CPUs. */
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cpusetsize = sysconf(_SC_CPUSET_SIZE);
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if (cpusetsize == -1 || (u_long)cpusetsize > sizeof(cpuset_t))
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err(EX_OSERR, "Cannot determine which CPUs are logical");
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CPU_ZERO(&logical_cpus_mask);
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setsize = (size_t)cpusetsize;
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if (sysctlbyname("machdep.logical_cpus_mask", &logical_cpus_mask,
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&setsize, NULL, 0) < 0)
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CPU_ZERO(&logical_cpus_mask);
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ncpu = pc->pm_ncpu;
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for (c = cpu = 0; cpu < ncpu; cpu++) {
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#if defined(__i386__) || defined(__amd64__)
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if (pc->pm_cputype == PMC_CPU_INTEL_PIV &&
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CPU_ISSET(cpu, &logical_cpus_mask))
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continue; /* skip P4-style 'logical' cpus */
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#endif
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if (pmc_pmcinfo(cpu, &pi) < 0) {
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if (errno == ENXIO)
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continue;
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err(EX_OSERR, "Unable to get PMC status for CPU %d",
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cpu);
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}
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printf("#CPU %d:\n", c++);
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npmc = pmc_npmc(cpu);
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printf("#N NAME CLASS STATE ROW-DISP\n");
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for (n = 0; n < npmc; n++) {
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pd = &pi->pm_pmcs[n];
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printf(" %-2d %-16s %-6s %-8s %-10s",
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n,
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pd->pm_name,
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pmc_name_of_class(pd->pm_class),
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pd->pm_enabled ? "ENABLED" : "DISABLED",
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pmc_name_of_disposition(pd->pm_rowdisp));
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if (pd->pm_ownerpid != -1) {
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printf(" (pid %d)", pd->pm_ownerpid);
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printf(" %-32s",
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pmc_name_of_event(pd->pm_event));
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if (PMC_IS_SAMPLING_MODE(pd->pm_mode))
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printf(" (reload count %jd)",
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pd->pm_reloadcount);
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}
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printf("\n");
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}
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free(pi);
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}
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return 0;
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}
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static int
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pmcc_do_list_events(void)
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{
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enum pmc_class c;
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unsigned int i, j, nevents;
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const char **eventnamelist;
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const struct pmc_cpuinfo *ci;
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if (pmc_cpuinfo(&ci) != 0)
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err(EX_OSERR, "Unable to determine CPU information");
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eventnamelist = NULL;
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for (i = 0; i < ci->pm_nclass; i++) {
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c = ci->pm_classes[i].pm_class;
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printf("%s\n", pmc_name_of_class(c));
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if (pmc_event_names_of_class(c, &eventnamelist, &nevents) < 0)
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err(EX_OSERR,
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"ERROR: Cannot find information for event class \"%s\"",
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pmc_name_of_class(c));
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for (j = 0; j < nevents; j++)
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printf("\t%s\n", eventnamelist[j]);
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free(eventnamelist);
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}
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return 0;
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}
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static int
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pmcc_show_statistics(void)
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{
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struct pmc_driverstats gms;
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if (pmc_get_driver_stats(&gms) < 0)
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err(EX_OSERR, "ERROR: cannot retrieve driver statistics");
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/*
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* Print statistics.
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*/
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#define PRINT(N,V) (void) printf("%-40s %d\n", (N), gms.pm_##V)
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PRINT("interrupts processed:", intr_processed);
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PRINT("non-PMC interrupts:", intr_ignored);
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PRINT("sampling stalls due to space shortages:", intr_bufferfull);
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PRINT("system calls:", syscalls);
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PRINT("system calls with errors:", syscall_errors);
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PRINT("buffer requests:", buffer_requests);
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PRINT("buffer requests failed:", buffer_requests_failed);
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PRINT("sampling log sweeps:", log_sweeps);
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return 0;
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}
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/*
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* Main
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*/
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int
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main(int argc, char **argv)
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{
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int error, command, currentcpu, option, pmc;
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char *dummy;
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struct pmcc_op *p;
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#if DEBUG
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pmcc_init_debug();
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#endif
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/* parse args */
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currentcpu = PMCC_CPU_ALL;
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command = PMCC_PRINT_USAGE;
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error = 0;
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STAILQ_INIT(&head);
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while ((option = getopt(argc, argv, ":c:d:e:lLs")) != -1)
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switch (option) {
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case 'L':
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if (command != PMCC_PRINT_USAGE) {
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error = 1;
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break;
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}
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command = PMCC_PRINT_EVENTS;
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break;
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case 'c':
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if (command != PMCC_PRINT_USAGE &&
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command != PMCC_ENABLE_DISABLE) {
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error = 1;
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break;
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}
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command = PMCC_ENABLE_DISABLE;
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if (*optarg == PMCC_CPU_WILDCARD)
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currentcpu = PMCC_CPU_ALL;
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else {
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currentcpu = strtoul(optarg, &dummy, 0);
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if (*dummy != '\0' || currentcpu < 0)
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errx(EX_DATAERR,
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"\"%s\" is not a valid CPU id",
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optarg);
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}
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break;
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case 'd':
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case 'e':
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if (command != PMCC_PRINT_USAGE &&
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command != PMCC_ENABLE_DISABLE) {
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error = 1;
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break;
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}
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command = PMCC_ENABLE_DISABLE;
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if (*optarg == PMCC_PMC_WILDCARD)
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pmc = PMCC_PMC_ALL;
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else {
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pmc = strtoul(optarg, &dummy, 0);
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if (*dummy != '\0' || pmc < 0)
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errx(EX_DATAERR,
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"\"%s\" is not a valid PMC id",
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optarg);
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}
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if ((p = malloc(sizeof(*p))) == NULL)
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err(EX_SOFTWARE, "Out of memory");
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p->op_cpu = currentcpu;
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p->op_pmc = pmc;
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p->op_op = option == 'd' ? PMCC_OP_DISABLE :
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PMCC_OP_ENABLE;
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STAILQ_INSERT_TAIL(&head, p, op_next);
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break;
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case 'l':
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if (command != PMCC_PRINT_USAGE) {
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error = 1;
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break;
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}
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command = PMCC_LIST_STATE;
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break;
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case 's':
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if (command != PMCC_PRINT_USAGE) {
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error = 1;
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break;
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}
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command = PMCC_SHOW_STATISTICS;
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break;
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case ':':
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errx(EX_USAGE,
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"Missing argument to option '-%c'", optopt);
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break;
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case '?':
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warnx("Unrecognized option \"-%c\"", optopt);
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errx(EX_USAGE, "%s", usage_message);
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break;
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default:
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error = 1;
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break;
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}
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if (command == PMCC_PRINT_USAGE)
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(void) errx(EX_USAGE, "%s", usage_message);
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if (error)
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exit(EX_USAGE);
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if (pmc_init() < 0)
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err(EX_UNAVAILABLE,
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"Initialization of the pmc(3) library failed");
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switch (command) {
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case PMCC_LIST_STATE:
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error = pmcc_do_list_state();
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break;
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case PMCC_PRINT_EVENTS:
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error = pmcc_do_list_events();
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break;
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case PMCC_SHOW_STATISTICS:
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error = pmcc_show_statistics();
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break;
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case PMCC_ENABLE_DISABLE:
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if (STAILQ_EMPTY(&head))
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errx(EX_USAGE,
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"No PMCs specified to enable or disable");
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error = pmcc_do_enable_disable(&head);
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break;
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default:
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assert(0);
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}
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if (error != 0)
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err(EX_OSERR, "Command failed");
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exit(0);
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}
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