2cee77c450
perf stat continues running even if the event list contains counters
that are not supported. The resulting output then contains <not counted>
for those events which gets confusing as to which events are supported,
but not counted and which are not supported.
Before:
perf stat -ddd -- sleep 1
Performance counter stats for 'sleep 1':
0.571283 task-clock # 0.001 CPUs utilized
1 context-switches # 0.002 M/sec
0 CPU-migrations # 0.000 M/sec
157 page-faults # 0.275 M/sec
1,037,707 cycles # 1.816 GHz
<not counted> stalled-cycles-frontend
<not counted> stalled-cycles-backend
654,499 instructions # 0.63 insns per cycle
136,129 branches # 238.286 M/sec
<not counted> branch-misses
<not counted> L1-dcache-loads
<not counted> L1-dcache-load-misses
<not counted> LLC-loads
<not counted> LLC-load-misses
<not counted> L1-icache-loads
<not counted> L1-icache-load-misses
<not counted> dTLB-loads
<not counted> dTLB-load-misses
<not counted> iTLB-loads
<not counted> iTLB-load-misses
<not counted> L1-dcache-prefetches
<not counted> L1-dcache-prefetch-misses
1.001004836 seconds time elapsed
After:
perf stat -ddd -- sleep 1
Performance counter stats for 'sleep 1':
1.350326 task-clock # 0.001 CPUs utilized
2 context-switches # 0.001 M/sec
0 CPU-migrations # 0.000 M/sec
157 page-faults # 0.116 M/sec
11,986 cycles # 0.009 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
496,986 instructions # 41.46 insns per cycle
138,065 branches # 102.246 M/sec
7,245 branch-misses # 5.25% of all branches
<not counted> L1-dcache-loads
<not counted> L1-dcache-load-misses
<not counted> LLC-loads
<not counted> LLC-load-misses
<not counted> L1-icache-loads
<not counted> L1-icache-load-misses
<not counted> dTLB-loads
<not counted> dTLB-load-misses
<not counted> iTLB-loads
<not counted> iTLB-load-misses
<not counted> L1-dcache-prefetches
<not supported> L1-dcache-prefetch-misses
1.002397333 seconds time elapsed
v1->v2:
changed supported type from int to bool
v2->v3
fixed vertical alignment of new struct element
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1306767359-13221-1-git-send-email-dsahern@gmail.com
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
160 lines
4.2 KiB
C
160 lines
4.2 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 "../../../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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int ids;
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struct hists hists;
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char *name;
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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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bool supported;
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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_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
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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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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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int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
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struct cpu_map *cpus, bool group);
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int perf_evsel__open_per_thread(struct perf_evsel *evsel,
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struct thread_map *threads, bool group);
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int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
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struct thread_map *threads, bool group);
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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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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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int __perf_evsel__sample_size(u64 sample_type);
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static inline int perf_evsel__sample_size(struct perf_evsel *evsel)
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{
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return __perf_evsel__sample_size(evsel->attr.sample_type);
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}
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#endif /* __PERF_EVSEL_H */
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