forked from Minki/linux
7a5a5ca5fe
When mmaping multiple events we need to find the right evsel that matches an event in the ring buffer. For that we need to set the PERF_FORMAT_ID bit in perf_event_attr.read_format so that when we read the event fds we get that id to then hash it and be able later to use perf_evlist__id2evsel to find the right evsel. We also need to set the PERF_SAMPLE_ID bit in perf_event_attr.sample_type to ask for that id to be stashed in each sample, so that we can demux it. So add a perf_evsel__set_sample_id() method to do those two things in one operation. 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> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-1z4xcmbud30lamklfe80oopu@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
247 lines
6.9 KiB
C
247 lines
6.9 KiB
C
#ifndef __PERF_EVSEL_H
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#define __PERF_EVSEL_H 1
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#include <linux/list.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <linux/perf_event.h>
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#include "types.h"
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#include "xyarray.h"
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#include "cgroup.h"
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#include "hist.h"
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struct perf_counts_values {
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union {
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struct {
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u64 val;
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u64 ena;
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u64 run;
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};
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u64 values[3];
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};
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};
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struct perf_counts {
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s8 scaled;
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struct perf_counts_values aggr;
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struct perf_counts_values cpu[];
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};
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struct perf_evsel;
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/*
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* Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are
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* more than one entry in the evlist.
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*/
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struct perf_sample_id {
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struct hlist_node node;
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u64 id;
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struct perf_evsel *evsel;
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};
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/** struct perf_evsel - event selector
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*
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* @name - Can be set to retain the original event name passed by the user,
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* so that when showing results in tools such as 'perf stat', we
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* show the name used, not some alias.
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*/
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struct perf_evsel {
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struct list_head node;
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struct perf_event_attr attr;
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char *filter;
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struct xyarray *fd;
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struct xyarray *sample_id;
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u64 *id;
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struct perf_counts *counts;
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int idx;
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u32 ids;
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struct hists hists;
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char *name;
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struct event_format *tp_format;
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union {
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void *priv;
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off_t id_offset;
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};
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struct cgroup_sel *cgrp;
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struct {
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void *func;
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void *data;
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} handler;
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struct cpu_map *cpus;
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unsigned int sample_size;
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bool supported;
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bool needs_swap;
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/* parse modifier helper */
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int exclude_GH;
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struct perf_evsel *leader;
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char *group_name;
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};
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struct cpu_map;
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struct thread_map;
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struct perf_evlist;
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struct perf_record_opts;
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struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
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struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name, int idx);
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struct event_format *event_format__new(const char *sys, const char *name);
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void perf_evsel__init(struct perf_evsel *evsel,
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struct perf_event_attr *attr, int idx);
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void perf_evsel__exit(struct perf_evsel *evsel);
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void perf_evsel__delete(struct perf_evsel *evsel);
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void perf_evsel__config(struct perf_evsel *evsel,
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struct perf_record_opts *opts);
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bool perf_evsel__is_cache_op_valid(u8 type, u8 op);
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#define PERF_EVSEL__MAX_ALIASES 8
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extern const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
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[PERF_EVSEL__MAX_ALIASES];
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extern const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
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[PERF_EVSEL__MAX_ALIASES];
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extern const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
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[PERF_EVSEL__MAX_ALIASES];
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extern const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX];
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extern const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX];
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int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
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char *bf, size_t size);
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const char *perf_evsel__name(struct perf_evsel *evsel);
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int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
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int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
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int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
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void perf_evsel__free_fd(struct perf_evsel *evsel);
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void perf_evsel__free_id(struct perf_evsel *evsel);
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void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
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void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
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enum perf_event_sample_format bit);
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void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
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enum perf_event_sample_format bit);
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#define perf_evsel__set_sample_bit(evsel, bit) \
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__perf_evsel__set_sample_bit(evsel, PERF_SAMPLE_##bit)
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#define perf_evsel__reset_sample_bit(evsel, bit) \
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__perf_evsel__reset_sample_bit(evsel, PERF_SAMPLE_##bit)
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void perf_evsel__set_sample_id(struct perf_evsel *evsel);
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int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
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const char *filter);
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int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
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struct cpu_map *cpus);
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int perf_evsel__open_per_thread(struct perf_evsel *evsel,
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struct thread_map *threads);
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int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
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struct thread_map *threads);
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void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads);
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struct perf_sample;
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void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
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const char *name);
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u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
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const char *name);
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static inline char *perf_evsel__strval(struct perf_evsel *evsel,
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struct perf_sample *sample,
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const char *name)
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{
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return perf_evsel__rawptr(evsel, sample, name);
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}
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struct format_field;
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struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name);
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#define perf_evsel__match(evsel, t, c) \
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(evsel->attr.type == PERF_TYPE_##t && \
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evsel->attr.config == PERF_COUNT_##c)
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static inline bool perf_evsel__match2(struct perf_evsel *e1,
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struct perf_evsel *e2)
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{
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return (e1->attr.type == e2->attr.type) &&
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(e1->attr.config == e2->attr.config);
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}
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int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
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int cpu, int thread, bool scale);
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/**
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* perf_evsel__read_on_cpu - Read out the results on a CPU and thread
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*
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* @evsel - event selector to read value
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* @cpu - CPU of interest
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* @thread - thread of interest
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*/
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static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
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int cpu, int thread)
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{
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return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
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}
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/**
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* perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
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*
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* @evsel - event selector to read value
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* @cpu - CPU of interest
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* @thread - thread of interest
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*/
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static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
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int cpu, int thread)
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{
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return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
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}
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int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
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bool scale);
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/**
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* perf_evsel__read - Read the aggregate results on all CPUs
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*
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* @evsel - event selector to read value
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* @ncpus - Number of cpus affected, from zero
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* @nthreads - Number of threads affected, from zero
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*/
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static inline int perf_evsel__read(struct perf_evsel *evsel,
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int ncpus, int nthreads)
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{
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return __perf_evsel__read(evsel, ncpus, nthreads, false);
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}
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/**
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* perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
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*
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* @evsel - event selector to read value
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* @ncpus - Number of cpus affected, from zero
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* @nthreads - Number of threads affected, from zero
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*/
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static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
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int ncpus, int nthreads)
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{
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return __perf_evsel__read(evsel, ncpus, nthreads, true);
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}
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void hists__init(struct hists *hists);
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int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
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struct perf_sample *sample);
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static inline struct perf_evsel *perf_evsel__next(struct perf_evsel *evsel)
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{
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return list_entry(evsel->node.next, struct perf_evsel, node);
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}
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static inline bool perf_evsel__is_group_leader(const struct perf_evsel *evsel)
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{
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return evsel->leader == evsel;
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}
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#endif /* __PERF_EVSEL_H */
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