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![Michael Petlan](/assets/img/avatar_default.png)
Some 'perf stat' options do not make sense to be negated (event, cgroup), some do not have negated path implemented (metrics). Due to that, it is better to disable the "no-" prefix for them, since otherwise, the later opt-parsing segfaults. Before: $ perf stat --no-metrics -- ls Segmentation fault (core dumped) After: $ perf stat --no-metrics -- ls Error: option `no-metrics' isn't available Usage: perf stat [<options>] [<command>] Signed-off-by: Michael Petlan <mpetlan@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> LPU-Reference: 1485912065.62416880.1544457604340.JavaMail.zimbra@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1914 lines
50 KiB
C
1914 lines
50 KiB
C
/*
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* builtin-stat.c
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*
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* Builtin stat command: Give a precise performance counters summary
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* overview about any workload, CPU or specific PID.
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*
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* Sample output:
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$ perf stat ./hackbench 10
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Time: 0.118
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Performance counter stats for './hackbench 10':
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1708.761321 task-clock # 11.037 CPUs utilized
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41,190 context-switches # 0.024 M/sec
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6,735 CPU-migrations # 0.004 M/sec
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17,318 page-faults # 0.010 M/sec
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5,205,202,243 cycles # 3.046 GHz
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3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
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1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
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2,603,501,247 instructions # 0.50 insns per cycle
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# 1.48 stalled cycles per insn
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484,357,498 branches # 283.455 M/sec
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6,388,934 branch-misses # 1.32% of all branches
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0.154822978 seconds time elapsed
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*
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* Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
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*
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* Improvements and fixes by:
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*
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* Arjan van de Ven <arjan@linux.intel.com>
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* Yanmin Zhang <yanmin.zhang@intel.com>
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* Wu Fengguang <fengguang.wu@intel.com>
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* Mike Galbraith <efault@gmx.de>
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* Paul Mackerras <paulus@samba.org>
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* Jaswinder Singh Rajput <jaswinder@kernel.org>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "perf.h"
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#include "builtin.h"
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#include "util/cgroup.h"
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#include "util/util.h"
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#include <subcmd/parse-options.h>
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#include "util/parse-events.h"
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#include "util/pmu.h"
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#include "util/event.h"
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#include "util/evlist.h"
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#include "util/evsel.h"
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#include "util/debug.h"
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#include "util/drv_configs.h"
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#include "util/color.h"
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#include "util/stat.h"
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#include "util/header.h"
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#include "util/cpumap.h"
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#include "util/thread.h"
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#include "util/thread_map.h"
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#include "util/counts.h"
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#include "util/group.h"
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#include "util/session.h"
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#include "util/tool.h"
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#include "util/string2.h"
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#include "util/metricgroup.h"
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#include "util/top.h"
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#include "asm/bug.h"
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#include <linux/time64.h>
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#include <api/fs/fs.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <sys/prctl.h>
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#include <inttypes.h>
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#include <locale.h>
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#include <math.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/wait.h>
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#include "sane_ctype.h"
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#define DEFAULT_SEPARATOR " "
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#define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi"
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static void print_counters(struct timespec *ts, int argc, const char **argv);
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/* Default events used for perf stat -T */
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static const char *transaction_attrs = {
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"task-clock,"
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"{"
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"instructions,"
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"cycles,"
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"cpu/cycles-t/,"
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"cpu/tx-start/,"
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"cpu/el-start/,"
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"cpu/cycles-ct/"
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"}"
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};
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/* More limited version when the CPU does not have all events. */
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static const char * transaction_limited_attrs = {
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"task-clock,"
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"{"
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"instructions,"
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"cycles,"
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"cpu/cycles-t/,"
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"cpu/tx-start/"
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"}"
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};
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static const char * topdown_attrs[] = {
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"topdown-total-slots",
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"topdown-slots-retired",
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"topdown-recovery-bubbles",
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"topdown-fetch-bubbles",
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"topdown-slots-issued",
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NULL,
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};
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static const char *smi_cost_attrs = {
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"{"
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"msr/aperf/,"
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"msr/smi/,"
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"cycles"
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"}"
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};
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static struct perf_evlist *evsel_list;
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static struct target target = {
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.uid = UINT_MAX,
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};
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#define METRIC_ONLY_LEN 20
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static volatile pid_t child_pid = -1;
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static int detailed_run = 0;
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static bool transaction_run;
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static bool topdown_run = false;
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static bool smi_cost = false;
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static bool smi_reset = false;
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static int big_num_opt = -1;
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static bool group = false;
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static const char *pre_cmd = NULL;
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static const char *post_cmd = NULL;
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static bool sync_run = false;
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static bool forever = false;
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static bool force_metric_only = false;
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static struct timespec ref_time;
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static bool append_file;
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static bool interval_count;
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static const char *output_name;
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static int output_fd;
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struct perf_stat {
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bool record;
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struct perf_data data;
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struct perf_session *session;
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u64 bytes_written;
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struct perf_tool tool;
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bool maps_allocated;
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struct cpu_map *cpus;
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struct thread_map *threads;
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enum aggr_mode aggr_mode;
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};
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static struct perf_stat perf_stat;
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#define STAT_RECORD perf_stat.record
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static volatile int done = 0;
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static struct perf_stat_config stat_config = {
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.aggr_mode = AGGR_GLOBAL,
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.scale = true,
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.unit_width = 4, /* strlen("unit") */
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.run_count = 1,
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.metric_only_len = METRIC_ONLY_LEN,
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.walltime_nsecs_stats = &walltime_nsecs_stats,
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.big_num = true,
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};
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static inline void diff_timespec(struct timespec *r, struct timespec *a,
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struct timespec *b)
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{
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r->tv_sec = a->tv_sec - b->tv_sec;
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if (a->tv_nsec < b->tv_nsec) {
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r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
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r->tv_sec--;
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} else {
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r->tv_nsec = a->tv_nsec - b->tv_nsec ;
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}
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}
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static void perf_stat__reset_stats(void)
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{
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int i;
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perf_evlist__reset_stats(evsel_list);
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perf_stat__reset_shadow_stats();
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for (i = 0; i < stat_config.stats_num; i++)
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perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
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}
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static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
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union perf_event *event,
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struct perf_sample *sample __maybe_unused,
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struct machine *machine __maybe_unused)
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{
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if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
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pr_err("failed to write perf data, error: %m\n");
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return -1;
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}
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perf_stat.bytes_written += event->header.size;
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return 0;
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}
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static int write_stat_round_event(u64 tm, u64 type)
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{
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return perf_event__synthesize_stat_round(NULL, tm, type,
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process_synthesized_event,
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NULL);
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}
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#define WRITE_STAT_ROUND_EVENT(time, interval) \
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write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
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#define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
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static int
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perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
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struct perf_counts_values *count)
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{
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struct perf_sample_id *sid = SID(counter, cpu, thread);
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return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
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process_synthesized_event, NULL);
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}
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/*
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* Read out the results of a single counter:
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* do not aggregate counts across CPUs in system-wide mode
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*/
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static int read_counter(struct perf_evsel *counter)
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{
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int nthreads = thread_map__nr(evsel_list->threads);
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int ncpus, cpu, thread;
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if (target__has_cpu(&target) && !target__has_per_thread(&target))
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ncpus = perf_evsel__nr_cpus(counter);
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else
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ncpus = 1;
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if (!counter->supported)
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return -ENOENT;
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if (counter->system_wide)
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nthreads = 1;
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for (thread = 0; thread < nthreads; thread++) {
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for (cpu = 0; cpu < ncpus; cpu++) {
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struct perf_counts_values *count;
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count = perf_counts(counter->counts, cpu, thread);
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/*
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* The leader's group read loads data into its group members
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* (via perf_evsel__read_counter) and sets threir count->loaded.
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*/
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if (!count->loaded &&
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perf_evsel__read_counter(counter, cpu, thread)) {
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counter->counts->scaled = -1;
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perf_counts(counter->counts, cpu, thread)->ena = 0;
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perf_counts(counter->counts, cpu, thread)->run = 0;
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return -1;
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}
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count->loaded = false;
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if (STAT_RECORD) {
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if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
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pr_err("failed to write stat event\n");
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return -1;
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}
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}
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if (verbose > 1) {
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fprintf(stat_config.output,
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"%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
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perf_evsel__name(counter),
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cpu,
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count->val, count->ena, count->run);
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}
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}
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}
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return 0;
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}
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static void read_counters(void)
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{
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struct perf_evsel *counter;
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int ret;
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evlist__for_each_entry(evsel_list, counter) {
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ret = read_counter(counter);
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if (ret)
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pr_debug("failed to read counter %s\n", counter->name);
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if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
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pr_warning("failed to process counter %s\n", counter->name);
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}
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}
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static void process_interval(void)
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{
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struct timespec ts, rs;
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read_counters();
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clock_gettime(CLOCK_MONOTONIC, &ts);
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diff_timespec(&rs, &ts, &ref_time);
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if (STAT_RECORD) {
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if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
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pr_err("failed to write stat round event\n");
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}
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init_stats(&walltime_nsecs_stats);
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update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
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print_counters(&rs, 0, NULL);
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}
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static void enable_counters(void)
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{
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if (stat_config.initial_delay)
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usleep(stat_config.initial_delay * USEC_PER_MSEC);
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/*
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* We need to enable counters only if:
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* - we don't have tracee (attaching to task or cpu)
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* - we have initial delay configured
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*/
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if (!target__none(&target) || stat_config.initial_delay)
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perf_evlist__enable(evsel_list);
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}
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static void disable_counters(void)
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{
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/*
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* If we don't have tracee (attaching to task or cpu), counters may
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* still be running. To get accurate group ratios, we must stop groups
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* from counting before reading their constituent counters.
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*/
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if (!target__none(&target))
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perf_evlist__disable(evsel_list);
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}
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static volatile int workload_exec_errno;
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/*
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* perf_evlist__prepare_workload will send a SIGUSR1
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* if the fork fails, since we asked by setting its
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* want_signal to true.
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*/
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static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
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void *ucontext __maybe_unused)
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{
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workload_exec_errno = info->si_value.sival_int;
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}
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static bool perf_evsel__should_store_id(struct perf_evsel *counter)
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{
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return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
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}
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static bool is_target_alive(struct target *_target,
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struct thread_map *threads)
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{
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struct stat st;
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int i;
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if (!target__has_task(_target))
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return true;
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for (i = 0; i < threads->nr; i++) {
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char path[PATH_MAX];
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scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
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threads->map[i].pid);
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if (!stat(path, &st))
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return true;
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}
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return false;
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}
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static int __run_perf_stat(int argc, const char **argv, int run_idx)
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{
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int interval = stat_config.interval;
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int times = stat_config.times;
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int timeout = stat_config.timeout;
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char msg[BUFSIZ];
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unsigned long long t0, t1;
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struct perf_evsel *counter;
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struct timespec ts;
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size_t l;
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int status = 0;
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const bool forks = (argc > 0);
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bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
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struct perf_evsel_config_term *err_term;
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if (interval) {
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ts.tv_sec = interval / USEC_PER_MSEC;
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ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
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} else if (timeout) {
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ts.tv_sec = timeout / USEC_PER_MSEC;
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ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
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} else {
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ts.tv_sec = 1;
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ts.tv_nsec = 0;
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}
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if (forks) {
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if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
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workload_exec_failed_signal) < 0) {
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perror("failed to prepare workload");
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return -1;
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}
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child_pid = evsel_list->workload.pid;
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}
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if (group)
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perf_evlist__set_leader(evsel_list);
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evlist__for_each_entry(evsel_list, counter) {
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try_again:
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if (create_perf_stat_counter(counter, &stat_config, &target) < 0) {
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/* Weak group failed. Reset the group. */
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if ((errno == EINVAL || errno == EBADF) &&
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counter->leader != counter &&
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counter->weak_group) {
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counter = perf_evlist__reset_weak_group(evsel_list, counter);
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goto try_again;
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}
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/*
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* PPC returns ENXIO for HW counters until 2.6.37
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* (behavior changed with commit b0a873e).
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*/
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if (errno == EINVAL || errno == ENOSYS ||
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errno == ENOENT || errno == EOPNOTSUPP ||
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errno == ENXIO) {
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if (verbose > 0)
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ui__warning("%s event is not supported by the kernel.\n",
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perf_evsel__name(counter));
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counter->supported = false;
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if ((counter->leader != counter) ||
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!(counter->leader->nr_members > 1))
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continue;
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} else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
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if (verbose > 0)
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ui__warning("%s\n", msg);
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goto try_again;
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} else if (target__has_per_thread(&target) &&
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evsel_list->threads &&
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evsel_list->threads->err_thread != -1) {
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/*
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* For global --per-thread case, skip current
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* error thread.
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*/
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if (!thread_map__remove(evsel_list->threads,
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evsel_list->threads->err_thread)) {
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evsel_list->threads->err_thread = -1;
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goto try_again;
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}
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}
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perf_evsel__open_strerror(counter, &target,
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errno, msg, sizeof(msg));
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ui__error("%s\n", msg);
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if (child_pid != -1)
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kill(child_pid, SIGTERM);
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return -1;
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}
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counter->supported = true;
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l = strlen(counter->unit);
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if (l > stat_config.unit_width)
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stat_config.unit_width = l;
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if (perf_evsel__should_store_id(counter) &&
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perf_evsel__store_ids(counter, evsel_list))
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return -1;
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}
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if (perf_evlist__apply_filters(evsel_list, &counter)) {
|
|
pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
|
|
counter->filter, perf_evsel__name(counter), errno,
|
|
str_error_r(errno, msg, sizeof(msg)));
|
|
return -1;
|
|
}
|
|
|
|
if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) {
|
|
pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
|
|
err_term->val.drv_cfg, perf_evsel__name(counter), errno,
|
|
str_error_r(errno, msg, sizeof(msg)));
|
|
return -1;
|
|
}
|
|
|
|
if (STAT_RECORD) {
|
|
int err, fd = perf_data__fd(&perf_stat.data);
|
|
|
|
if (is_pipe) {
|
|
err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
|
|
} else {
|
|
err = perf_session__write_header(perf_stat.session, evsel_list,
|
|
fd, false);
|
|
}
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = perf_stat_synthesize_config(&stat_config, NULL, evsel_list,
|
|
process_synthesized_event, is_pipe);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Enable counters and exec the command:
|
|
*/
|
|
t0 = rdclock();
|
|
clock_gettime(CLOCK_MONOTONIC, &ref_time);
|
|
|
|
if (forks) {
|
|
perf_evlist__start_workload(evsel_list);
|
|
enable_counters();
|
|
|
|
if (interval || timeout) {
|
|
while (!waitpid(child_pid, &status, WNOHANG)) {
|
|
nanosleep(&ts, NULL);
|
|
if (timeout)
|
|
break;
|
|
process_interval();
|
|
if (interval_count && !(--times))
|
|
break;
|
|
}
|
|
}
|
|
wait4(child_pid, &status, 0, &stat_config.ru_data);
|
|
|
|
if (workload_exec_errno) {
|
|
const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
|
|
pr_err("Workload failed: %s\n", emsg);
|
|
return -1;
|
|
}
|
|
|
|
if (WIFSIGNALED(status))
|
|
psignal(WTERMSIG(status), argv[0]);
|
|
} else {
|
|
enable_counters();
|
|
while (!done) {
|
|
nanosleep(&ts, NULL);
|
|
if (!is_target_alive(&target, evsel_list->threads))
|
|
break;
|
|
if (timeout)
|
|
break;
|
|
if (interval) {
|
|
process_interval();
|
|
if (interval_count && !(--times))
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
disable_counters();
|
|
|
|
t1 = rdclock();
|
|
|
|
if (stat_config.walltime_run_table)
|
|
stat_config.walltime_run[run_idx] = t1 - t0;
|
|
|
|
update_stats(&walltime_nsecs_stats, t1 - t0);
|
|
|
|
/*
|
|
* Closing a group leader splits the group, and as we only disable
|
|
* group leaders, results in remaining events becoming enabled. To
|
|
* avoid arbitrary skew, we must read all counters before closing any
|
|
* group leaders.
|
|
*/
|
|
read_counters();
|
|
perf_evlist__close(evsel_list);
|
|
|
|
return WEXITSTATUS(status);
|
|
}
|
|
|
|
static int run_perf_stat(int argc, const char **argv, int run_idx)
|
|
{
|
|
int ret;
|
|
|
|
if (pre_cmd) {
|
|
ret = system(pre_cmd);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (sync_run)
|
|
sync();
|
|
|
|
ret = __run_perf_stat(argc, argv, run_idx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (post_cmd) {
|
|
ret = system(post_cmd);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void print_counters(struct timespec *ts, int argc, const char **argv)
|
|
{
|
|
/* Do not print anything if we record to the pipe. */
|
|
if (STAT_RECORD && perf_stat.data.is_pipe)
|
|
return;
|
|
|
|
perf_evlist__print_counters(evsel_list, &stat_config, &target,
|
|
ts, argc, argv);
|
|
}
|
|
|
|
static volatile int signr = -1;
|
|
|
|
static void skip_signal(int signo)
|
|
{
|
|
if ((child_pid == -1) || stat_config.interval)
|
|
done = 1;
|
|
|
|
signr = signo;
|
|
/*
|
|
* render child_pid harmless
|
|
* won't send SIGTERM to a random
|
|
* process in case of race condition
|
|
* and fast PID recycling
|
|
*/
|
|
child_pid = -1;
|
|
}
|
|
|
|
static void sig_atexit(void)
|
|
{
|
|
sigset_t set, oset;
|
|
|
|
/*
|
|
* avoid race condition with SIGCHLD handler
|
|
* in skip_signal() which is modifying child_pid
|
|
* goal is to avoid send SIGTERM to a random
|
|
* process
|
|
*/
|
|
sigemptyset(&set);
|
|
sigaddset(&set, SIGCHLD);
|
|
sigprocmask(SIG_BLOCK, &set, &oset);
|
|
|
|
if (child_pid != -1)
|
|
kill(child_pid, SIGTERM);
|
|
|
|
sigprocmask(SIG_SETMASK, &oset, NULL);
|
|
|
|
if (signr == -1)
|
|
return;
|
|
|
|
signal(signr, SIG_DFL);
|
|
kill(getpid(), signr);
|
|
}
|
|
|
|
static int stat__set_big_num(const struct option *opt __maybe_unused,
|
|
const char *s __maybe_unused, int unset)
|
|
{
|
|
big_num_opt = unset ? 0 : 1;
|
|
return 0;
|
|
}
|
|
|
|
static int enable_metric_only(const struct option *opt __maybe_unused,
|
|
const char *s __maybe_unused, int unset)
|
|
{
|
|
force_metric_only = true;
|
|
stat_config.metric_only = !unset;
|
|
return 0;
|
|
}
|
|
|
|
static int parse_metric_groups(const struct option *opt,
|
|
const char *str,
|
|
int unset __maybe_unused)
|
|
{
|
|
return metricgroup__parse_groups(opt, str, &stat_config.metric_events);
|
|
}
|
|
|
|
static struct option stat_options[] = {
|
|
OPT_BOOLEAN('T', "transaction", &transaction_run,
|
|
"hardware transaction statistics"),
|
|
OPT_CALLBACK('e', "event", &evsel_list, "event",
|
|
"event selector. use 'perf list' to list available events",
|
|
parse_events_option),
|
|
OPT_CALLBACK(0, "filter", &evsel_list, "filter",
|
|
"event filter", parse_filter),
|
|
OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
|
|
"child tasks do not inherit counters"),
|
|
OPT_STRING('p', "pid", &target.pid, "pid",
|
|
"stat events on existing process id"),
|
|
OPT_STRING('t', "tid", &target.tid, "tid",
|
|
"stat events on existing thread id"),
|
|
OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
|
|
"system-wide collection from all CPUs"),
|
|
OPT_BOOLEAN('g', "group", &group,
|
|
"put the counters into a counter group"),
|
|
OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
|
|
OPT_INCR('v', "verbose", &verbose,
|
|
"be more verbose (show counter open errors, etc)"),
|
|
OPT_INTEGER('r', "repeat", &stat_config.run_count,
|
|
"repeat command and print average + stddev (max: 100, forever: 0)"),
|
|
OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
|
|
"display details about each run (only with -r option)"),
|
|
OPT_BOOLEAN('n', "null", &stat_config.null_run,
|
|
"null run - dont start any counters"),
|
|
OPT_INCR('d', "detailed", &detailed_run,
|
|
"detailed run - start a lot of events"),
|
|
OPT_BOOLEAN('S', "sync", &sync_run,
|
|
"call sync() before starting a run"),
|
|
OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
|
|
"print large numbers with thousands\' separators",
|
|
stat__set_big_num),
|
|
OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
|
|
"list of cpus to monitor in system-wide"),
|
|
OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
|
|
"disable CPU count aggregation", AGGR_NONE),
|
|
OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
|
|
OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
|
|
"print counts with custom separator"),
|
|
OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
|
|
"monitor event in cgroup name only", parse_cgroups),
|
|
OPT_STRING('o', "output", &output_name, "file", "output file name"),
|
|
OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
|
|
OPT_INTEGER(0, "log-fd", &output_fd,
|
|
"log output to fd, instead of stderr"),
|
|
OPT_STRING(0, "pre", &pre_cmd, "command",
|
|
"command to run prior to the measured command"),
|
|
OPT_STRING(0, "post", &post_cmd, "command",
|
|
"command to run after to the measured command"),
|
|
OPT_UINTEGER('I', "interval-print", &stat_config.interval,
|
|
"print counts at regular interval in ms "
|
|
"(overhead is possible for values <= 100ms)"),
|
|
OPT_INTEGER(0, "interval-count", &stat_config.times,
|
|
"print counts for fixed number of times"),
|
|
OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
|
|
"clear screen in between new interval"),
|
|
OPT_UINTEGER(0, "timeout", &stat_config.timeout,
|
|
"stop workload and print counts after a timeout period in ms (>= 10ms)"),
|
|
OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
|
|
"aggregate counts per processor socket", AGGR_SOCKET),
|
|
OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
|
|
"aggregate counts per physical processor core", AGGR_CORE),
|
|
OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
|
|
"aggregate counts per thread", AGGR_THREAD),
|
|
OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
|
|
"ms to wait before starting measurement after program start"),
|
|
OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
|
|
"Only print computed metrics. No raw values", enable_metric_only),
|
|
OPT_BOOLEAN(0, "topdown", &topdown_run,
|
|
"measure topdown level 1 statistics"),
|
|
OPT_BOOLEAN(0, "smi-cost", &smi_cost,
|
|
"measure SMI cost"),
|
|
OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
|
|
"monitor specified metrics or metric groups (separated by ,)",
|
|
parse_metric_groups),
|
|
OPT_END()
|
|
};
|
|
|
|
static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
|
|
struct cpu_map *map, int cpu)
|
|
{
|
|
return cpu_map__get_socket(map, cpu, NULL);
|
|
}
|
|
|
|
static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
|
|
struct cpu_map *map, int cpu)
|
|
{
|
|
return cpu_map__get_core(map, cpu, NULL);
|
|
}
|
|
|
|
static int cpu_map__get_max(struct cpu_map *map)
|
|
{
|
|
int i, max = -1;
|
|
|
|
for (i = 0; i < map->nr; i++) {
|
|
if (map->map[i] > max)
|
|
max = map->map[i];
|
|
}
|
|
|
|
return max;
|
|
}
|
|
|
|
static int perf_stat__get_aggr(struct perf_stat_config *config,
|
|
aggr_get_id_t get_id, struct cpu_map *map, int idx)
|
|
{
|
|
int cpu;
|
|
|
|
if (idx >= map->nr)
|
|
return -1;
|
|
|
|
cpu = map->map[idx];
|
|
|
|
if (config->cpus_aggr_map->map[cpu] == -1)
|
|
config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
|
|
|
|
return config->cpus_aggr_map->map[cpu];
|
|
}
|
|
|
|
static int perf_stat__get_socket_cached(struct perf_stat_config *config,
|
|
struct cpu_map *map, int idx)
|
|
{
|
|
return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
|
|
}
|
|
|
|
static int perf_stat__get_core_cached(struct perf_stat_config *config,
|
|
struct cpu_map *map, int idx)
|
|
{
|
|
return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
|
|
}
|
|
|
|
static int perf_stat_init_aggr_mode(void)
|
|
{
|
|
int nr;
|
|
|
|
switch (stat_config.aggr_mode) {
|
|
case AGGR_SOCKET:
|
|
if (cpu_map__build_socket_map(evsel_list->cpus, &stat_config.aggr_map)) {
|
|
perror("cannot build socket map");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_get_id = perf_stat__get_socket_cached;
|
|
break;
|
|
case AGGR_CORE:
|
|
if (cpu_map__build_core_map(evsel_list->cpus, &stat_config.aggr_map)) {
|
|
perror("cannot build core map");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_get_id = perf_stat__get_core_cached;
|
|
break;
|
|
case AGGR_NONE:
|
|
case AGGR_GLOBAL:
|
|
case AGGR_THREAD:
|
|
case AGGR_UNSET:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* The evsel_list->cpus is the base we operate on,
|
|
* taking the highest cpu number to be the size of
|
|
* the aggregation translate cpumap.
|
|
*/
|
|
nr = cpu_map__get_max(evsel_list->cpus);
|
|
stat_config.cpus_aggr_map = cpu_map__empty_new(nr + 1);
|
|
return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static void perf_stat__exit_aggr_mode(void)
|
|
{
|
|
cpu_map__put(stat_config.aggr_map);
|
|
cpu_map__put(stat_config.cpus_aggr_map);
|
|
stat_config.aggr_map = NULL;
|
|
stat_config.cpus_aggr_map = NULL;
|
|
}
|
|
|
|
static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
|
|
{
|
|
int cpu;
|
|
|
|
if (idx > map->nr)
|
|
return -1;
|
|
|
|
cpu = map->map[idx];
|
|
|
|
if (cpu >= env->nr_cpus_avail)
|
|
return -1;
|
|
|
|
return cpu;
|
|
}
|
|
|
|
static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
|
|
{
|
|
struct perf_env *env = data;
|
|
int cpu = perf_env__get_cpu(env, map, idx);
|
|
|
|
return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
|
|
}
|
|
|
|
static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
|
|
{
|
|
struct perf_env *env = data;
|
|
int core = -1, cpu = perf_env__get_cpu(env, map, idx);
|
|
|
|
if (cpu != -1) {
|
|
int socket_id = env->cpu[cpu].socket_id;
|
|
|
|
/*
|
|
* Encode socket in upper 16 bits
|
|
* core_id is relative to socket, and
|
|
* we need a global id. So we combine
|
|
* socket + core id.
|
|
*/
|
|
core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
|
|
}
|
|
|
|
return core;
|
|
}
|
|
|
|
static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
|
|
struct cpu_map **sockp)
|
|
{
|
|
return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
|
|
}
|
|
|
|
static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
|
|
struct cpu_map **corep)
|
|
{
|
|
return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
|
|
}
|
|
|
|
static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
|
|
struct cpu_map *map, int idx)
|
|
{
|
|
return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
|
|
}
|
|
|
|
static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
|
|
struct cpu_map *map, int idx)
|
|
{
|
|
return perf_env__get_core(map, idx, &perf_stat.session->header.env);
|
|
}
|
|
|
|
static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
|
|
{
|
|
struct perf_env *env = &st->session->header.env;
|
|
|
|
switch (stat_config.aggr_mode) {
|
|
case AGGR_SOCKET:
|
|
if (perf_env__build_socket_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
|
|
perror("cannot build socket map");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_get_id = perf_stat__get_socket_file;
|
|
break;
|
|
case AGGR_CORE:
|
|
if (perf_env__build_core_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
|
|
perror("cannot build core map");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_get_id = perf_stat__get_core_file;
|
|
break;
|
|
case AGGR_NONE:
|
|
case AGGR_GLOBAL:
|
|
case AGGR_THREAD:
|
|
case AGGR_UNSET:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int topdown_filter_events(const char **attr, char **str, bool use_group)
|
|
{
|
|
int off = 0;
|
|
int i;
|
|
int len = 0;
|
|
char *s;
|
|
|
|
for (i = 0; attr[i]; i++) {
|
|
if (pmu_have_event("cpu", attr[i])) {
|
|
len += strlen(attr[i]) + 1;
|
|
attr[i - off] = attr[i];
|
|
} else
|
|
off++;
|
|
}
|
|
attr[i - off] = NULL;
|
|
|
|
*str = malloc(len + 1 + 2);
|
|
if (!*str)
|
|
return -1;
|
|
s = *str;
|
|
if (i - off == 0) {
|
|
*s = 0;
|
|
return 0;
|
|
}
|
|
if (use_group)
|
|
*s++ = '{';
|
|
for (i = 0; attr[i]; i++) {
|
|
strcpy(s, attr[i]);
|
|
s += strlen(s);
|
|
*s++ = ',';
|
|
}
|
|
if (use_group) {
|
|
s[-1] = '}';
|
|
*s = 0;
|
|
} else
|
|
s[-1] = 0;
|
|
return 0;
|
|
}
|
|
|
|
__weak bool arch_topdown_check_group(bool *warn)
|
|
{
|
|
*warn = false;
|
|
return false;
|
|
}
|
|
|
|
__weak void arch_topdown_group_warn(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Add default attributes, if there were no attributes specified or
|
|
* if -d/--detailed, -d -d or -d -d -d is used:
|
|
*/
|
|
static int add_default_attributes(void)
|
|
{
|
|
int err;
|
|
struct perf_event_attr default_attrs0[] = {
|
|
|
|
{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
|
|
{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
|
|
{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
|
|
{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
|
|
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
|
|
};
|
|
struct perf_event_attr frontend_attrs[] = {
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
|
|
};
|
|
struct perf_event_attr backend_attrs[] = {
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
|
|
};
|
|
struct perf_event_attr default_attrs1[] = {
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
|
|
|
|
};
|
|
|
|
/*
|
|
* Detailed stats (-d), covering the L1 and last level data caches:
|
|
*/
|
|
struct perf_event_attr detailed_attrs[] = {
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_L1D << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_L1D << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_LL << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_LL << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
|
|
};
|
|
|
|
/*
|
|
* Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
|
|
*/
|
|
struct perf_event_attr very_detailed_attrs[] = {
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_L1I << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_L1I << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_DTLB << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_DTLB << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_ITLB << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_ITLB << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_READ << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
|
|
|
|
};
|
|
|
|
/*
|
|
* Very, very detailed stats (-d -d -d), adding prefetch events:
|
|
*/
|
|
struct perf_event_attr very_very_detailed_attrs[] = {
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_L1D << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
|
|
|
|
{ .type = PERF_TYPE_HW_CACHE,
|
|
.config =
|
|
PERF_COUNT_HW_CACHE_L1D << 0 |
|
|
(PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
|
|
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
|
|
};
|
|
struct parse_events_error errinfo;
|
|
|
|
/* Set attrs if no event is selected and !null_run: */
|
|
if (stat_config.null_run)
|
|
return 0;
|
|
|
|
if (transaction_run) {
|
|
/* Handle -T as -M transaction. Once platform specific metrics
|
|
* support has been added to the json files, all archictures
|
|
* will use this approach. To determine transaction support
|
|
* on an architecture test for such a metric name.
|
|
*/
|
|
if (metricgroup__has_metric("transaction")) {
|
|
struct option opt = { .value = &evsel_list };
|
|
|
|
return metricgroup__parse_groups(&opt, "transaction",
|
|
&stat_config.metric_events);
|
|
}
|
|
|
|
if (pmu_have_event("cpu", "cycles-ct") &&
|
|
pmu_have_event("cpu", "el-start"))
|
|
err = parse_events(evsel_list, transaction_attrs,
|
|
&errinfo);
|
|
else
|
|
err = parse_events(evsel_list,
|
|
transaction_limited_attrs,
|
|
&errinfo);
|
|
if (err) {
|
|
fprintf(stderr, "Cannot set up transaction events\n");
|
|
parse_events_print_error(&errinfo, transaction_attrs);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (smi_cost) {
|
|
int smi;
|
|
|
|
if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
|
|
fprintf(stderr, "freeze_on_smi is not supported.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!smi) {
|
|
if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
|
|
fprintf(stderr, "Failed to set freeze_on_smi.\n");
|
|
return -1;
|
|
}
|
|
smi_reset = true;
|
|
}
|
|
|
|
if (pmu_have_event("msr", "aperf") &&
|
|
pmu_have_event("msr", "smi")) {
|
|
if (!force_metric_only)
|
|
stat_config.metric_only = true;
|
|
err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
|
|
} else {
|
|
fprintf(stderr, "To measure SMI cost, it needs "
|
|
"msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
|
|
parse_events_print_error(&errinfo, smi_cost_attrs);
|
|
return -1;
|
|
}
|
|
if (err) {
|
|
fprintf(stderr, "Cannot set up SMI cost events\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (topdown_run) {
|
|
char *str = NULL;
|
|
bool warn = false;
|
|
|
|
if (stat_config.aggr_mode != AGGR_GLOBAL &&
|
|
stat_config.aggr_mode != AGGR_CORE) {
|
|
pr_err("top down event configuration requires --per-core mode\n");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_mode = AGGR_CORE;
|
|
if (nr_cgroups || !target__has_cpu(&target)) {
|
|
pr_err("top down event configuration requires system-wide mode (-a)\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!force_metric_only)
|
|
stat_config.metric_only = true;
|
|
if (topdown_filter_events(topdown_attrs, &str,
|
|
arch_topdown_check_group(&warn)) < 0) {
|
|
pr_err("Out of memory\n");
|
|
return -1;
|
|
}
|
|
if (topdown_attrs[0] && str) {
|
|
if (warn)
|
|
arch_topdown_group_warn();
|
|
err = parse_events(evsel_list, str, &errinfo);
|
|
if (err) {
|
|
fprintf(stderr,
|
|
"Cannot set up top down events %s: %d\n",
|
|
str, err);
|
|
free(str);
|
|
parse_events_print_error(&errinfo, str);
|
|
return -1;
|
|
}
|
|
} else {
|
|
fprintf(stderr, "System does not support topdown\n");
|
|
return -1;
|
|
}
|
|
free(str);
|
|
}
|
|
|
|
if (!evsel_list->nr_entries) {
|
|
if (target__has_cpu(&target))
|
|
default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
|
|
|
|
if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
|
|
return -1;
|
|
if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
|
|
if (perf_evlist__add_default_attrs(evsel_list,
|
|
frontend_attrs) < 0)
|
|
return -1;
|
|
}
|
|
if (pmu_have_event("cpu", "stalled-cycles-backend")) {
|
|
if (perf_evlist__add_default_attrs(evsel_list,
|
|
backend_attrs) < 0)
|
|
return -1;
|
|
}
|
|
if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
|
|
return -1;
|
|
}
|
|
|
|
/* Detailed events get appended to the event list: */
|
|
|
|
if (detailed_run < 1)
|
|
return 0;
|
|
|
|
/* Append detailed run extra attributes: */
|
|
if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
|
|
return -1;
|
|
|
|
if (detailed_run < 2)
|
|
return 0;
|
|
|
|
/* Append very detailed run extra attributes: */
|
|
if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
|
|
return -1;
|
|
|
|
if (detailed_run < 3)
|
|
return 0;
|
|
|
|
/* Append very, very detailed run extra attributes: */
|
|
return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
|
|
}
|
|
|
|
static const char * const stat_record_usage[] = {
|
|
"perf stat record [<options>]",
|
|
NULL,
|
|
};
|
|
|
|
static void init_features(struct perf_session *session)
|
|
{
|
|
int feat;
|
|
|
|
for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
|
|
perf_header__set_feat(&session->header, feat);
|
|
|
|
perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
|
|
perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
|
|
perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
|
|
perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
|
|
}
|
|
|
|
static int __cmd_record(int argc, const char **argv)
|
|
{
|
|
struct perf_session *session;
|
|
struct perf_data *data = &perf_stat.data;
|
|
|
|
argc = parse_options(argc, argv, stat_options, stat_record_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
if (output_name)
|
|
data->file.path = output_name;
|
|
|
|
if (stat_config.run_count != 1 || forever) {
|
|
pr_err("Cannot use -r option with perf stat record.\n");
|
|
return -1;
|
|
}
|
|
|
|
session = perf_session__new(data, false, NULL);
|
|
if (session == NULL) {
|
|
pr_err("Perf session creation failed.\n");
|
|
return -1;
|
|
}
|
|
|
|
init_features(session);
|
|
|
|
session->evlist = evsel_list;
|
|
perf_stat.session = session;
|
|
perf_stat.record = true;
|
|
return argc;
|
|
}
|
|
|
|
static int process_stat_round_event(struct perf_session *session,
|
|
union perf_event *event)
|
|
{
|
|
struct stat_round_event *stat_round = &event->stat_round;
|
|
struct perf_evsel *counter;
|
|
struct timespec tsh, *ts = NULL;
|
|
const char **argv = session->header.env.cmdline_argv;
|
|
int argc = session->header.env.nr_cmdline;
|
|
|
|
evlist__for_each_entry(evsel_list, counter)
|
|
perf_stat_process_counter(&stat_config, counter);
|
|
|
|
if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
|
|
update_stats(&walltime_nsecs_stats, stat_round->time);
|
|
|
|
if (stat_config.interval && stat_round->time) {
|
|
tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
|
|
tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
|
|
ts = &tsh;
|
|
}
|
|
|
|
print_counters(ts, argc, argv);
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int process_stat_config_event(struct perf_session *session,
|
|
union perf_event *event)
|
|
{
|
|
struct perf_tool *tool = session->tool;
|
|
struct perf_stat *st = container_of(tool, struct perf_stat, tool);
|
|
|
|
perf_event__read_stat_config(&stat_config, &event->stat_config);
|
|
|
|
if (cpu_map__empty(st->cpus)) {
|
|
if (st->aggr_mode != AGGR_UNSET)
|
|
pr_warning("warning: processing task data, aggregation mode not set\n");
|
|
return 0;
|
|
}
|
|
|
|
if (st->aggr_mode != AGGR_UNSET)
|
|
stat_config.aggr_mode = st->aggr_mode;
|
|
|
|
if (perf_stat.data.is_pipe)
|
|
perf_stat_init_aggr_mode();
|
|
else
|
|
perf_stat_init_aggr_mode_file(st);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int set_maps(struct perf_stat *st)
|
|
{
|
|
if (!st->cpus || !st->threads)
|
|
return 0;
|
|
|
|
if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
|
|
return -EINVAL;
|
|
|
|
perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
|
|
|
|
if (perf_evlist__alloc_stats(evsel_list, true))
|
|
return -ENOMEM;
|
|
|
|
st->maps_allocated = true;
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int process_thread_map_event(struct perf_session *session,
|
|
union perf_event *event)
|
|
{
|
|
struct perf_tool *tool = session->tool;
|
|
struct perf_stat *st = container_of(tool, struct perf_stat, tool);
|
|
|
|
if (st->threads) {
|
|
pr_warning("Extra thread map event, ignoring.\n");
|
|
return 0;
|
|
}
|
|
|
|
st->threads = thread_map__new_event(&event->thread_map);
|
|
if (!st->threads)
|
|
return -ENOMEM;
|
|
|
|
return set_maps(st);
|
|
}
|
|
|
|
static
|
|
int process_cpu_map_event(struct perf_session *session,
|
|
union perf_event *event)
|
|
{
|
|
struct perf_tool *tool = session->tool;
|
|
struct perf_stat *st = container_of(tool, struct perf_stat, tool);
|
|
struct cpu_map *cpus;
|
|
|
|
if (st->cpus) {
|
|
pr_warning("Extra cpu map event, ignoring.\n");
|
|
return 0;
|
|
}
|
|
|
|
cpus = cpu_map__new_data(&event->cpu_map.data);
|
|
if (!cpus)
|
|
return -ENOMEM;
|
|
|
|
st->cpus = cpus;
|
|
return set_maps(st);
|
|
}
|
|
|
|
static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
|
|
{
|
|
int i;
|
|
|
|
config->stats = calloc(nthreads, sizeof(struct runtime_stat));
|
|
if (!config->stats)
|
|
return -1;
|
|
|
|
config->stats_num = nthreads;
|
|
|
|
for (i = 0; i < nthreads; i++)
|
|
runtime_stat__init(&config->stats[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void runtime_stat_delete(struct perf_stat_config *config)
|
|
{
|
|
int i;
|
|
|
|
if (!config->stats)
|
|
return;
|
|
|
|
for (i = 0; i < config->stats_num; i++)
|
|
runtime_stat__exit(&config->stats[i]);
|
|
|
|
free(config->stats);
|
|
}
|
|
|
|
static const char * const stat_report_usage[] = {
|
|
"perf stat report [<options>]",
|
|
NULL,
|
|
};
|
|
|
|
static struct perf_stat perf_stat = {
|
|
.tool = {
|
|
.attr = perf_event__process_attr,
|
|
.event_update = perf_event__process_event_update,
|
|
.thread_map = process_thread_map_event,
|
|
.cpu_map = process_cpu_map_event,
|
|
.stat_config = process_stat_config_event,
|
|
.stat = perf_event__process_stat_event,
|
|
.stat_round = process_stat_round_event,
|
|
},
|
|
.aggr_mode = AGGR_UNSET,
|
|
};
|
|
|
|
static int __cmd_report(int argc, const char **argv)
|
|
{
|
|
struct perf_session *session;
|
|
const struct option options[] = {
|
|
OPT_STRING('i', "input", &input_name, "file", "input file name"),
|
|
OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
|
|
"aggregate counts per processor socket", AGGR_SOCKET),
|
|
OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
|
|
"aggregate counts per physical processor core", AGGR_CORE),
|
|
OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
|
|
"disable CPU count aggregation", AGGR_NONE),
|
|
OPT_END()
|
|
};
|
|
struct stat st;
|
|
int ret;
|
|
|
|
argc = parse_options(argc, argv, options, stat_report_usage, 0);
|
|
|
|
if (!input_name || !strlen(input_name)) {
|
|
if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
|
|
input_name = "-";
|
|
else
|
|
input_name = "perf.data";
|
|
}
|
|
|
|
perf_stat.data.file.path = input_name;
|
|
perf_stat.data.mode = PERF_DATA_MODE_READ;
|
|
|
|
session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
|
|
if (session == NULL)
|
|
return -1;
|
|
|
|
perf_stat.session = session;
|
|
stat_config.output = stderr;
|
|
evsel_list = session->evlist;
|
|
|
|
ret = perf_session__process_events(session);
|
|
if (ret)
|
|
return ret;
|
|
|
|
perf_session__delete(session);
|
|
return 0;
|
|
}
|
|
|
|
static void setup_system_wide(int forks)
|
|
{
|
|
/*
|
|
* Make system wide (-a) the default target if
|
|
* no target was specified and one of following
|
|
* conditions is met:
|
|
*
|
|
* - there's no workload specified
|
|
* - there is workload specified but all requested
|
|
* events are system wide events
|
|
*/
|
|
if (!target__none(&target))
|
|
return;
|
|
|
|
if (!forks)
|
|
target.system_wide = true;
|
|
else {
|
|
struct perf_evsel *counter;
|
|
|
|
evlist__for_each_entry(evsel_list, counter) {
|
|
if (!counter->system_wide)
|
|
return;
|
|
}
|
|
|
|
if (evsel_list->nr_entries)
|
|
target.system_wide = true;
|
|
}
|
|
}
|
|
|
|
int cmd_stat(int argc, const char **argv)
|
|
{
|
|
const char * const stat_usage[] = {
|
|
"perf stat [<options>] [<command>]",
|
|
NULL
|
|
};
|
|
int status = -EINVAL, run_idx;
|
|
const char *mode;
|
|
FILE *output = stderr;
|
|
unsigned int interval, timeout;
|
|
const char * const stat_subcommands[] = { "record", "report" };
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
evsel_list = perf_evlist__new();
|
|
if (evsel_list == NULL)
|
|
return -ENOMEM;
|
|
|
|
parse_events__shrink_config_terms();
|
|
|
|
/* String-parsing callback-based options would segfault when negated */
|
|
set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
|
|
set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
|
|
set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
|
|
|
|
argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
|
|
(const char **) stat_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
perf_stat__collect_metric_expr(evsel_list);
|
|
perf_stat__init_shadow_stats();
|
|
|
|
if (stat_config.csv_sep) {
|
|
stat_config.csv_output = true;
|
|
if (!strcmp(stat_config.csv_sep, "\\t"))
|
|
stat_config.csv_sep = "\t";
|
|
} else
|
|
stat_config.csv_sep = DEFAULT_SEPARATOR;
|
|
|
|
if (argc && !strncmp(argv[0], "rec", 3)) {
|
|
argc = __cmd_record(argc, argv);
|
|
if (argc < 0)
|
|
return -1;
|
|
} else if (argc && !strncmp(argv[0], "rep", 3))
|
|
return __cmd_report(argc, argv);
|
|
|
|
interval = stat_config.interval;
|
|
timeout = stat_config.timeout;
|
|
|
|
/*
|
|
* For record command the -o is already taken care of.
|
|
*/
|
|
if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
|
|
output = NULL;
|
|
|
|
if (output_name && output_fd) {
|
|
fprintf(stderr, "cannot use both --output and --log-fd\n");
|
|
parse_options_usage(stat_usage, stat_options, "o", 1);
|
|
parse_options_usage(NULL, stat_options, "log-fd", 0);
|
|
goto out;
|
|
}
|
|
|
|
if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
|
|
fprintf(stderr, "--metric-only is not supported with --per-thread\n");
|
|
goto out;
|
|
}
|
|
|
|
if (stat_config.metric_only && stat_config.run_count > 1) {
|
|
fprintf(stderr, "--metric-only is not supported with -r\n");
|
|
goto out;
|
|
}
|
|
|
|
if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
|
|
fprintf(stderr, "--table is only supported with -r\n");
|
|
parse_options_usage(stat_usage, stat_options, "r", 1);
|
|
parse_options_usage(NULL, stat_options, "table", 0);
|
|
goto out;
|
|
}
|
|
|
|
if (output_fd < 0) {
|
|
fprintf(stderr, "argument to --log-fd must be a > 0\n");
|
|
parse_options_usage(stat_usage, stat_options, "log-fd", 0);
|
|
goto out;
|
|
}
|
|
|
|
if (!output) {
|
|
struct timespec tm;
|
|
mode = append_file ? "a" : "w";
|
|
|
|
output = fopen(output_name, mode);
|
|
if (!output) {
|
|
perror("failed to create output file");
|
|
return -1;
|
|
}
|
|
clock_gettime(CLOCK_REALTIME, &tm);
|
|
fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
|
|
} else if (output_fd > 0) {
|
|
mode = append_file ? "a" : "w";
|
|
output = fdopen(output_fd, mode);
|
|
if (!output) {
|
|
perror("Failed opening logfd");
|
|
return -errno;
|
|
}
|
|
}
|
|
|
|
stat_config.output = output;
|
|
|
|
/*
|
|
* let the spreadsheet do the pretty-printing
|
|
*/
|
|
if (stat_config.csv_output) {
|
|
/* User explicitly passed -B? */
|
|
if (big_num_opt == 1) {
|
|
fprintf(stderr, "-B option not supported with -x\n");
|
|
parse_options_usage(stat_usage, stat_options, "B", 1);
|
|
parse_options_usage(NULL, stat_options, "x", 1);
|
|
goto out;
|
|
} else /* Nope, so disable big number formatting */
|
|
stat_config.big_num = false;
|
|
} else if (big_num_opt == 0) /* User passed --no-big-num */
|
|
stat_config.big_num = false;
|
|
|
|
setup_system_wide(argc);
|
|
|
|
/*
|
|
* Display user/system times only for single
|
|
* run and when there's specified tracee.
|
|
*/
|
|
if ((stat_config.run_count == 1) && target__none(&target))
|
|
stat_config.ru_display = true;
|
|
|
|
if (stat_config.run_count < 0) {
|
|
pr_err("Run count must be a positive number\n");
|
|
parse_options_usage(stat_usage, stat_options, "r", 1);
|
|
goto out;
|
|
} else if (stat_config.run_count == 0) {
|
|
forever = true;
|
|
stat_config.run_count = 1;
|
|
}
|
|
|
|
if (stat_config.walltime_run_table) {
|
|
stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
|
|
if (!stat_config.walltime_run) {
|
|
pr_err("failed to setup -r option");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if ((stat_config.aggr_mode == AGGR_THREAD) &&
|
|
!target__has_task(&target)) {
|
|
if (!target.system_wide || target.cpu_list) {
|
|
fprintf(stderr, "The --per-thread option is only "
|
|
"available when monitoring via -p -t -a "
|
|
"options or only --per-thread.\n");
|
|
parse_options_usage(NULL, stat_options, "p", 1);
|
|
parse_options_usage(NULL, stat_options, "t", 1);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* no_aggr, cgroup are for system-wide only
|
|
* --per-thread is aggregated per thread, we dont mix it with cpu mode
|
|
*/
|
|
if (((stat_config.aggr_mode != AGGR_GLOBAL &&
|
|
stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
|
|
!target__has_cpu(&target)) {
|
|
fprintf(stderr, "both cgroup and no-aggregation "
|
|
"modes only available in system-wide mode\n");
|
|
|
|
parse_options_usage(stat_usage, stat_options, "G", 1);
|
|
parse_options_usage(NULL, stat_options, "A", 1);
|
|
parse_options_usage(NULL, stat_options, "a", 1);
|
|
goto out;
|
|
}
|
|
|
|
if (add_default_attributes())
|
|
goto out;
|
|
|
|
target__validate(&target);
|
|
|
|
if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
|
|
target.per_thread = true;
|
|
|
|
if (perf_evlist__create_maps(evsel_list, &target) < 0) {
|
|
if (target__has_task(&target)) {
|
|
pr_err("Problems finding threads of monitor\n");
|
|
parse_options_usage(stat_usage, stat_options, "p", 1);
|
|
parse_options_usage(NULL, stat_options, "t", 1);
|
|
} else if (target__has_cpu(&target)) {
|
|
perror("failed to parse CPUs map");
|
|
parse_options_usage(stat_usage, stat_options, "C", 1);
|
|
parse_options_usage(NULL, stat_options, "a", 1);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Initialize thread_map with comm names,
|
|
* so we could print it out on output.
|
|
*/
|
|
if (stat_config.aggr_mode == AGGR_THREAD) {
|
|
thread_map__read_comms(evsel_list->threads);
|
|
if (target.system_wide) {
|
|
if (runtime_stat_new(&stat_config,
|
|
thread_map__nr(evsel_list->threads))) {
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (stat_config.times && interval)
|
|
interval_count = true;
|
|
else if (stat_config.times && !interval) {
|
|
pr_err("interval-count option should be used together with "
|
|
"interval-print.\n");
|
|
parse_options_usage(stat_usage, stat_options, "interval-count", 0);
|
|
parse_options_usage(stat_usage, stat_options, "I", 1);
|
|
goto out;
|
|
}
|
|
|
|
if (timeout && timeout < 100) {
|
|
if (timeout < 10) {
|
|
pr_err("timeout must be >= 10ms.\n");
|
|
parse_options_usage(stat_usage, stat_options, "timeout", 0);
|
|
goto out;
|
|
} else
|
|
pr_warning("timeout < 100ms. "
|
|
"The overhead percentage could be high in some cases. "
|
|
"Please proceed with caution.\n");
|
|
}
|
|
if (timeout && interval) {
|
|
pr_err("timeout option is not supported with interval-print.\n");
|
|
parse_options_usage(stat_usage, stat_options, "timeout", 0);
|
|
parse_options_usage(stat_usage, stat_options, "I", 1);
|
|
goto out;
|
|
}
|
|
|
|
if (perf_evlist__alloc_stats(evsel_list, interval))
|
|
goto out;
|
|
|
|
if (perf_stat_init_aggr_mode())
|
|
goto out;
|
|
|
|
/*
|
|
* Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
|
|
* while avoiding that older tools show confusing messages.
|
|
*
|
|
* However for pipe sessions we need to keep it zero,
|
|
* because script's perf_evsel__check_attr is triggered
|
|
* by attr->sample_type != 0, and we can't run it on
|
|
* stat sessions.
|
|
*/
|
|
stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
|
|
|
|
/*
|
|
* We dont want to block the signals - that would cause
|
|
* child tasks to inherit that and Ctrl-C would not work.
|
|
* What we want is for Ctrl-C to work in the exec()-ed
|
|
* task, but being ignored by perf stat itself:
|
|
*/
|
|
atexit(sig_atexit);
|
|
if (!forever)
|
|
signal(SIGINT, skip_signal);
|
|
signal(SIGCHLD, skip_signal);
|
|
signal(SIGALRM, skip_signal);
|
|
signal(SIGABRT, skip_signal);
|
|
|
|
status = 0;
|
|
for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
|
|
if (stat_config.run_count != 1 && verbose > 0)
|
|
fprintf(output, "[ perf stat: executing run #%d ... ]\n",
|
|
run_idx + 1);
|
|
|
|
status = run_perf_stat(argc, argv, run_idx);
|
|
if (forever && status != -1) {
|
|
print_counters(NULL, argc, argv);
|
|
perf_stat__reset_stats();
|
|
}
|
|
}
|
|
|
|
if (!forever && status != -1 && !interval)
|
|
print_counters(NULL, argc, argv);
|
|
|
|
if (STAT_RECORD) {
|
|
/*
|
|
* We synthesize the kernel mmap record just so that older tools
|
|
* don't emit warnings about not being able to resolve symbols
|
|
* due to /proc/sys/kernel/kptr_restrict settings and instear provide
|
|
* a saner message about no samples being in the perf.data file.
|
|
*
|
|
* This also serves to suppress a warning about f_header.data.size == 0
|
|
* in header.c at the moment 'perf stat record' gets introduced, which
|
|
* is not really needed once we start adding the stat specific PERF_RECORD_
|
|
* records, but the need to suppress the kptr_restrict messages in older
|
|
* tools remain -acme
|
|
*/
|
|
int fd = perf_data__fd(&perf_stat.data);
|
|
int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
|
|
process_synthesized_event,
|
|
&perf_stat.session->machines.host);
|
|
if (err) {
|
|
pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
|
|
"older tools may produce warnings about this file\n.");
|
|
}
|
|
|
|
if (!interval) {
|
|
if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
|
|
pr_err("failed to write stat round event\n");
|
|
}
|
|
|
|
if (!perf_stat.data.is_pipe) {
|
|
perf_stat.session->header.data_size += perf_stat.bytes_written;
|
|
perf_session__write_header(perf_stat.session, evsel_list, fd, true);
|
|
}
|
|
|
|
perf_session__delete(perf_stat.session);
|
|
}
|
|
|
|
perf_stat__exit_aggr_mode();
|
|
perf_evlist__free_stats(evsel_list);
|
|
out:
|
|
free(stat_config.walltime_run);
|
|
|
|
if (smi_cost && smi_reset)
|
|
sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
|
|
|
|
perf_evlist__delete(evsel_list);
|
|
|
|
runtime_stat_delete(&stat_config);
|
|
|
|
return status;
|
|
}
|