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![Andi Kleen](/assets/img/avatar_default.png)
Restructure event reading to use affinity to minimize the number of IPIs needed. Before on a large test case with 94 CPUs: % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 3.16 0.106079 4 22082 read After: 3.43 0.081295 3 22082 read Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: http://lore.kernel.org/lkml/20191121001522.180827-11-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2196 lines
58 KiB
C
2196 lines
58 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#include "builtin.h"
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#include "perf.h"
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#include "util/cgroup.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/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_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/synthetic-events.h"
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#include "util/target.h"
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#include "util/time-utils.h"
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#include "util/top.h"
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#include "util/affinity.h"
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#include "asm/bug.h"
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#include <linux/time64.h>
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#include <linux/zalloc.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 <linux/err.h>
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#include <linux/ctype.h>
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#include <perf/evlist.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 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 perf_cpu_map *cpus;
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struct perf_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->core.sample_id, x, y)
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static int
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perf_evsel__write_stat_event(struct 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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static int read_single_counter(struct evsel *counter, int cpu,
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int thread, struct timespec *rs)
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{
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if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
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u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
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struct perf_counts_values *count =
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perf_counts(counter->counts, cpu, thread);
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count->ena = count->run = val;
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count->val = val;
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return 0;
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}
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return perf_evsel__read_counter(counter, cpu, thread);
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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_cpu(struct evsel *counter, struct timespec *rs, int cpu)
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{
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int nthreads = perf_thread_map__nr(evsel_list->core.threads);
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int thread;
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if (!counter->supported)
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return -ENOENT;
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if (counter->core.system_wide)
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nthreads = 1;
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for (thread = 0; thread < nthreads; thread++) {
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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 their count->loaded.
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*/
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if (!perf_counts__is_loaded(counter->counts, cpu, thread) &&
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read_single_counter(counter, cpu, thread, rs)) {
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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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perf_counts__set_loaded(counter->counts, cpu, thread, 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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return 0;
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}
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static void read_counters(struct timespec *rs)
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{
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struct evsel *counter;
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struct affinity affinity;
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int i, ncpus, cpu;
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if (affinity__setup(&affinity) < 0)
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return;
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ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus);
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if (!target__has_cpu(&target) || target__has_per_thread(&target))
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ncpus = 1;
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evlist__for_each_cpu(evsel_list, i, cpu) {
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if (i >= ncpus)
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break;
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affinity__set(&affinity, cpu);
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evlist__for_each_entry(evsel_list, counter) {
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if (evsel__cpu_iter_skip(counter, cpu))
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continue;
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if (!counter->err) {
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counter->err = read_counter_cpu(counter, rs,
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counter->cpu_iter - 1);
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}
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}
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}
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affinity__cleanup(&affinity);
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evlist__for_each_entry(evsel_list, counter) {
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if (counter->err)
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pr_debug("failed to read counter %s\n", counter->name);
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if (counter->err == 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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counter->err = 0;
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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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clock_gettime(CLOCK_MONOTONIC, &ts);
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diff_timespec(&rs, &ts, &ref_time);
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read_counters(&rs);
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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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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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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 evsel *counter)
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{
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return STAT_RECORD || counter->core.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 perf_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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enum counter_recovery {
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COUNTER_SKIP,
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COUNTER_RETRY,
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COUNTER_FATAL,
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};
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static enum counter_recovery stat_handle_error(struct evsel *counter)
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{
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char msg[BUFSIZ];
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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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/*
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* errored is a sticky flag that means one of the counter's
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* cpu event had a problem and needs to be reexamined.
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*/
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counter->errored = true;
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if ((counter->leader != counter) ||
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!(counter->leader->core.nr_members > 1))
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return COUNTER_SKIP;
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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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return COUNTER_RETRY;
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} else if (target__has_per_thread(&target) &&
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evsel_list->core.threads &&
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evsel_list->core.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->core.threads,
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evsel_list->core.threads->err_thread)) {
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evsel_list->core.threads->err_thread = -1;
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return COUNTER_RETRY;
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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 COUNTER_FATAL;
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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 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 affinity affinity;
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int i, cpu;
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bool second_pass = false;
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|
if (interval) {
|
|
ts.tv_sec = interval / USEC_PER_MSEC;
|
|
ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
|
|
} else if (timeout) {
|
|
ts.tv_sec = timeout / USEC_PER_MSEC;
|
|
ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
|
|
} else {
|
|
ts.tv_sec = 1;
|
|
ts.tv_nsec = 0;
|
|
}
|
|
|
|
if (forks) {
|
|
if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
|
|
workload_exec_failed_signal) < 0) {
|
|
perror("failed to prepare workload");
|
|
return -1;
|
|
}
|
|
child_pid = evsel_list->workload.pid;
|
|
}
|
|
|
|
if (group)
|
|
perf_evlist__set_leader(evsel_list);
|
|
|
|
if (affinity__setup(&affinity) < 0)
|
|
return -1;
|
|
|
|
evlist__for_each_cpu (evsel_list, i, cpu) {
|
|
affinity__set(&affinity, cpu);
|
|
|
|
evlist__for_each_entry(evsel_list, counter) {
|
|
if (evsel__cpu_iter_skip(counter, cpu))
|
|
continue;
|
|
if (counter->reset_group || counter->errored)
|
|
continue;
|
|
try_again:
|
|
if (create_perf_stat_counter(counter, &stat_config, &target,
|
|
counter->cpu_iter - 1) < 0) {
|
|
|
|
/*
|
|
* Weak group failed. We cannot just undo this here
|
|
* because earlier CPUs might be in group mode, and the kernel
|
|
* doesn't support mixing group and non group reads. Defer
|
|
* it to later.
|
|
* Don't close here because we're in the wrong affinity.
|
|
*/
|
|
if ((errno == EINVAL || errno == EBADF) &&
|
|
counter->leader != counter &&
|
|
counter->weak_group) {
|
|
perf_evlist__reset_weak_group(evsel_list, counter, false);
|
|
assert(counter->reset_group);
|
|
second_pass = true;
|
|
continue;
|
|
}
|
|
|
|
switch (stat_handle_error(counter)) {
|
|
case COUNTER_FATAL:
|
|
return -1;
|
|
case COUNTER_RETRY:
|
|
goto try_again;
|
|
case COUNTER_SKIP:
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
}
|
|
counter->supported = true;
|
|
}
|
|
}
|
|
|
|
if (second_pass) {
|
|
/*
|
|
* Now redo all the weak group after closing them,
|
|
* and also close errored counters.
|
|
*/
|
|
|
|
evlist__for_each_cpu(evsel_list, i, cpu) {
|
|
affinity__set(&affinity, cpu);
|
|
/* First close errored or weak retry */
|
|
evlist__for_each_entry(evsel_list, counter) {
|
|
if (!counter->reset_group && !counter->errored)
|
|
continue;
|
|
if (evsel__cpu_iter_skip_no_inc(counter, cpu))
|
|
continue;
|
|
perf_evsel__close_cpu(&counter->core, counter->cpu_iter);
|
|
}
|
|
/* Now reopen weak */
|
|
evlist__for_each_entry(evsel_list, counter) {
|
|
if (!counter->reset_group && !counter->errored)
|
|
continue;
|
|
if (evsel__cpu_iter_skip(counter, cpu))
|
|
continue;
|
|
if (!counter->reset_group)
|
|
continue;
|
|
try_again_reset:
|
|
pr_debug2("reopening weak %s\n", perf_evsel__name(counter));
|
|
if (create_perf_stat_counter(counter, &stat_config, &target,
|
|
counter->cpu_iter - 1) < 0) {
|
|
|
|
switch (stat_handle_error(counter)) {
|
|
case COUNTER_FATAL:
|
|
return -1;
|
|
case COUNTER_RETRY:
|
|
goto try_again_reset;
|
|
case COUNTER_SKIP:
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
counter->supported = true;
|
|
}
|
|
}
|
|
}
|
|
affinity__cleanup(&affinity);
|
|
|
|
evlist__for_each_entry(evsel_list, counter) {
|
|
if (!counter->supported) {
|
|
perf_evsel__free_fd(&counter->core);
|
|
continue;
|
|
}
|
|
|
|
l = strlen(counter->unit);
|
|
if (l > stat_config.unit_width)
|
|
stat_config.unit_width = l;
|
|
|
|
if (perf_evsel__should_store_id(counter) &&
|
|
perf_evsel__store_ids(counter, evsel_list))
|
|
return -1;
|
|
}
|
|
|
|
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 (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_event__synthesize_stat_events(&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;
|
|
}
|
|
}
|
|
if (child_pid != -1)
|
|
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->core.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(&(struct timespec) { .tv_nsec = t1-t0 });
|
|
|
|
/*
|
|
* We need to keep evsel_list alive, because it's processed
|
|
* later the evsel_list will be closed after.
|
|
*/
|
|
if (!STAT_RECORD)
|
|
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(0, "scale", &stat_config.scale,
|
|
"Use --no-scale to disable counter scaling for multiplexing"),
|
|
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-die", &stat_config.aggr_mode,
|
|
"aggregate counts per processor die", AGGR_DIE),
|
|
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_SET_UINT(0, "per-node", &stat_config.aggr_mode,
|
|
"aggregate counts per numa node", AGGR_NODE),
|
|
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_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
|
|
"Configure all used events to run in kernel space.",
|
|
PARSE_OPT_EXCLUSIVE),
|
|
OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
|
|
"Configure all used events to run in user space.",
|
|
PARSE_OPT_EXCLUSIVE),
|
|
OPT_END()
|
|
};
|
|
|
|
static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
|
|
struct perf_cpu_map *map, int cpu)
|
|
{
|
|
return cpu_map__get_socket(map, cpu, NULL);
|
|
}
|
|
|
|
static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
|
|
struct perf_cpu_map *map, int cpu)
|
|
{
|
|
return cpu_map__get_die(map, cpu, NULL);
|
|
}
|
|
|
|
static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
|
|
struct perf_cpu_map *map, int cpu)
|
|
{
|
|
return cpu_map__get_core(map, cpu, NULL);
|
|
}
|
|
|
|
static int perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
|
|
struct perf_cpu_map *map, int cpu)
|
|
{
|
|
return cpu_map__get_node(map, cpu, NULL);
|
|
}
|
|
|
|
static int perf_stat__get_aggr(struct perf_stat_config *config,
|
|
aggr_get_id_t get_id, struct perf_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 perf_cpu_map *map, int idx)
|
|
{
|
|
return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
|
|
}
|
|
|
|
static int perf_stat__get_die_cached(struct perf_stat_config *config,
|
|
struct perf_cpu_map *map, int idx)
|
|
{
|
|
return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
|
|
}
|
|
|
|
static int perf_stat__get_core_cached(struct perf_stat_config *config,
|
|
struct perf_cpu_map *map, int idx)
|
|
{
|
|
return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
|
|
}
|
|
|
|
static int perf_stat__get_node_cached(struct perf_stat_config *config,
|
|
struct perf_cpu_map *map, int idx)
|
|
{
|
|
return perf_stat__get_aggr(config, perf_stat__get_node, map, idx);
|
|
}
|
|
|
|
static bool term_percore_set(void)
|
|
{
|
|
struct evsel *counter;
|
|
|
|
evlist__for_each_entry(evsel_list, counter) {
|
|
if (counter->percore)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
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->core.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_DIE:
|
|
if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
|
|
perror("cannot build die map");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_get_id = perf_stat__get_die_cached;
|
|
break;
|
|
case AGGR_CORE:
|
|
if (cpu_map__build_core_map(evsel_list->core.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_NODE:
|
|
if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
|
|
perror("cannot build core map");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_get_id = perf_stat__get_node_cached;
|
|
break;
|
|
case AGGR_NONE:
|
|
if (term_percore_set()) {
|
|
if (cpu_map__build_core_map(evsel_list->core.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_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 = perf_cpu_map__max(evsel_list->core.cpus);
|
|
stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1);
|
|
return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static void perf_stat__exit_aggr_mode(void)
|
|
{
|
|
perf_cpu_map__put(stat_config.aggr_map);
|
|
perf_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 perf_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 perf_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_die(struct perf_cpu_map *map, int idx, void *data)
|
|
{
|
|
struct perf_env *env = data;
|
|
int die_id = -1, cpu = perf_env__get_cpu(env, map, idx);
|
|
|
|
if (cpu != -1) {
|
|
/*
|
|
* Encode socket in bit range 15:8
|
|
* die_id is relative to socket,
|
|
* we need a global id. So we combine
|
|
* socket + die id
|
|
*/
|
|
if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
|
|
return -1;
|
|
|
|
if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
|
|
return -1;
|
|
|
|
die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff);
|
|
}
|
|
|
|
return die_id;
|
|
}
|
|
|
|
static int perf_env__get_core(struct perf_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) {
|
|
/*
|
|
* Encode socket in bit range 31:24
|
|
* encode die id in bit range 23:16
|
|
* core_id is relative to socket and die,
|
|
* we need a global id. So we combine
|
|
* socket + die id + core id
|
|
*/
|
|
if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
|
|
return -1;
|
|
|
|
if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
|
|
return -1;
|
|
|
|
if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n"))
|
|
return -1;
|
|
|
|
core = (env->cpu[cpu].socket_id << 24) |
|
|
(env->cpu[cpu].die_id << 16) |
|
|
(env->cpu[cpu].core_id & 0xffff);
|
|
}
|
|
|
|
return core;
|
|
}
|
|
|
|
static int perf_env__get_node(struct perf_cpu_map *map, int idx, void *data)
|
|
{
|
|
int cpu = perf_env__get_cpu(data, map, idx);
|
|
|
|
return perf_env__numa_node(data, cpu);
|
|
}
|
|
|
|
static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus,
|
|
struct perf_cpu_map **sockp)
|
|
{
|
|
return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
|
|
}
|
|
|
|
static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus,
|
|
struct perf_cpu_map **diep)
|
|
{
|
|
return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
|
|
}
|
|
|
|
static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus,
|
|
struct perf_cpu_map **corep)
|
|
{
|
|
return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
|
|
}
|
|
|
|
static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus,
|
|
struct perf_cpu_map **nodep)
|
|
{
|
|
return cpu_map__build_map(cpus, nodep, perf_env__get_node, env);
|
|
}
|
|
|
|
static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
|
|
struct perf_cpu_map *map, int idx)
|
|
{
|
|
return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
|
|
}
|
|
static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
|
|
struct perf_cpu_map *map, int idx)
|
|
{
|
|
return perf_env__get_die(map, idx, &perf_stat.session->header.env);
|
|
}
|
|
|
|
static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
|
|
struct perf_cpu_map *map, int idx)
|
|
{
|
|
return perf_env__get_core(map, idx, &perf_stat.session->header.env);
|
|
}
|
|
|
|
static int perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
|
|
struct perf_cpu_map *map, int idx)
|
|
{
|
|
return perf_env__get_node(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->core.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_DIE:
|
|
if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
|
|
perror("cannot build die map");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_get_id = perf_stat__get_die_file;
|
|
break;
|
|
case AGGR_CORE:
|
|
if (perf_env__build_core_map(env, evsel_list->core.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_NODE:
|
|
if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
|
|
perror("cannot build core map");
|
|
return -1;
|
|
}
|
|
stat_config.aggr_get_id = perf_stat__get_node_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;
|
|
|
|
bzero(&errinfo, sizeof(errinfo));
|
|
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) {
|
|
parse_events_print_error(&errinfo, smi_cost_attrs);
|
|
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);
|
|
parse_events_print_error(&errinfo, str);
|
|
free(str);
|
|
return -1;
|
|
}
|
|
} else {
|
|
fprintf(stderr, "System does not support topdown\n");
|
|
return -1;
|
|
}
|
|
free(str);
|
|
}
|
|
|
|
if (!evsel_list->core.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_DIR_FORMAT);
|
|
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->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 (IS_ERR(session)) {
|
|
pr_err("Perf session creation failed\n");
|
|
return PTR_ERR(session);
|
|
}
|
|
|
|
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 perf_record_stat_round *stat_round = &event->stat_round;
|
|
struct 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 (perf_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->core, 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 perf_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]);
|
|
|
|
zfree(&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-die", &perf_stat.aggr_mode,
|
|
"aggregate counts per processor die", AGGR_DIE),
|
|
OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
|
|
"aggregate counts per physical processor core", AGGR_CORE),
|
|
OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
|
|
"aggregate counts per numa node", AGGR_NODE),
|
|
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.path = input_name;
|
|
perf_stat.data.mode = PERF_DATA_MODE_READ;
|
|
|
|
session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
|
|
if (IS_ERR(session))
|
|
return PTR_ERR(session);
|
|
|
|
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 evsel *counter;
|
|
|
|
evlist__for_each_entry(evsel_list, counter) {
|
|
if (!counter->core.system_wide)
|
|
return;
|
|
}
|
|
|
|
if (evsel_list->core.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 = 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->core.threads);
|
|
if (target.system_wide) {
|
|
if (runtime_stat_new(&stat_config,
|
|
perf_thread_map__nr(evsel_list->core.threads))) {
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (stat_config.aggr_mode == AGGR_NODE)
|
|
cpu__setup_cpunode_map();
|
|
|
|
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);
|
|
|
|
if (run_idx != 0)
|
|
perf_evlist__reset_prev_raw_counts(evsel_list);
|
|
|
|
status = run_perf_stat(argc, argv, run_idx);
|
|
if (forever && status != -1 && !interval) {
|
|
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);
|
|
}
|
|
|
|
evlist__close(evsel_list);
|
|
perf_session__delete(perf_stat.session);
|
|
}
|
|
|
|
perf_stat__exit_aggr_mode();
|
|
perf_evlist__free_stats(evsel_list);
|
|
out:
|
|
zfree(&stat_config.walltime_run);
|
|
|
|
if (smi_cost && smi_reset)
|
|
sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
|
|
|
|
evlist__delete(evsel_list);
|
|
|
|
runtime_stat_delete(&stat_config);
|
|
|
|
return status;
|
|
}
|