linux/tools/perf/util/evsel.h
Arnaldo Carvalho de Melo fcf65bf149 perf evsel: Cache associated event_format
We already lookup the associated event_format when reading the perf.data
header, so that we can cache the tracepoint name in evsel->name, so do
it a little further and save the event_format itself, so that we can
avoid relookups in tools that need to access it.

Change the tools to take the most obvious advantage, when they were
using pevent_find_event directly. More work is needed for further
removing the need of a pointer to pevent, such as when asking for event
field values ("common_pid" and the other common fields and per
event_format fields).

This is something that was planned but only got actually done when
Andrey Wagin needed to do this lookup at perf_tool->sample() time, when
we don't have access to pevent (session->pevent) to use with
pevent_find_event().

Cc: Andrey Wagin <avagin@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/n/tip-txkvew2ckko0b594ae8fbnyk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-08-07 23:43:37 -03:00

187 lines
5.2 KiB
C

#ifndef __PERF_EVSEL_H
#define __PERF_EVSEL_H 1
#include <linux/list.h>
#include <stdbool.h>
#include "../../../include/linux/perf_event.h"
#include "types.h"
#include "xyarray.h"
#include "cgroup.h"
#include "hist.h"
struct perf_counts_values {
union {
struct {
u64 val;
u64 ena;
u64 run;
};
u64 values[3];
};
};
struct perf_counts {
s8 scaled;
struct perf_counts_values aggr;
struct perf_counts_values cpu[];
};
struct perf_evsel;
/*
* Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are
* more than one entry in the evlist.
*/
struct perf_sample_id {
struct hlist_node node;
u64 id;
struct perf_evsel *evsel;
};
/** struct perf_evsel - event selector
*
* @name - Can be set to retain the original event name passed by the user,
* so that when showing results in tools such as 'perf stat', we
* show the name used, not some alias.
*/
struct perf_evsel {
struct list_head node;
struct perf_event_attr attr;
char *filter;
struct xyarray *fd;
struct xyarray *sample_id;
u64 *id;
struct perf_counts *counts;
int idx;
int ids;
struct hists hists;
char *name;
struct event_format *tp_format;
union {
void *priv;
off_t id_offset;
};
struct cgroup_sel *cgrp;
struct {
void *func;
void *data;
} handler;
unsigned int sample_size;
bool supported;
};
struct cpu_map;
struct thread_map;
struct perf_evlist;
struct perf_record_opts;
struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
void perf_evsel__init(struct perf_evsel *evsel,
struct perf_event_attr *attr, int idx);
void perf_evsel__exit(struct perf_evsel *evsel);
void perf_evsel__delete(struct perf_evsel *evsel);
void perf_evsel__config(struct perf_evsel *evsel,
struct perf_record_opts *opts,
struct perf_evsel *first);
bool perf_evsel__is_cache_op_valid(u8 type, u8 op);
#define PERF_EVSEL__MAX_ALIASES 8
extern const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
[PERF_EVSEL__MAX_ALIASES];
extern const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
[PERF_EVSEL__MAX_ALIASES];
const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
[PERF_EVSEL__MAX_ALIASES];
int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
char *bf, size_t size);
const char *perf_evsel__name(struct perf_evsel *evsel);
int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
void perf_evsel__free_fd(struct perf_evsel *evsel);
void perf_evsel__free_id(struct perf_evsel *evsel);
void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
struct cpu_map *cpus, bool group,
struct xyarray *group_fds);
int perf_evsel__open_per_thread(struct perf_evsel *evsel,
struct thread_map *threads, bool group,
struct xyarray *group_fds);
int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
struct thread_map *threads, bool group,
struct xyarray *group_fds);
void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads);
#define perf_evsel__match(evsel, t, c) \
(evsel->attr.type == PERF_TYPE_##t && \
evsel->attr.config == PERF_COUNT_##c)
int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
int cpu, int thread, bool scale);
/**
* perf_evsel__read_on_cpu - Read out the results on a CPU and thread
*
* @evsel - event selector to read value
* @cpu - CPU of interest
* @thread - thread of interest
*/
static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
int cpu, int thread)
{
return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
}
/**
* perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
*
* @evsel - event selector to read value
* @cpu - CPU of interest
* @thread - thread of interest
*/
static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
int cpu, int thread)
{
return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
}
int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
bool scale);
/**
* perf_evsel__read - Read the aggregate results on all CPUs
*
* @evsel - event selector to read value
* @ncpus - Number of cpus affected, from zero
* @nthreads - Number of threads affected, from zero
*/
static inline int perf_evsel__read(struct perf_evsel *evsel,
int ncpus, int nthreads)
{
return __perf_evsel__read(evsel, ncpus, nthreads, false);
}
/**
* perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
*
* @evsel - event selector to read value
* @ncpus - Number of cpus affected, from zero
* @nthreads - Number of threads affected, from zero
*/
static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
int ncpus, int nthreads)
{
return __perf_evsel__read(evsel, ncpus, nthreads, true);
}
void hists__init(struct hists *hists);
int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
struct perf_sample *sample, bool swapped);
#endif /* __PERF_EVSEL_H */