forked from Minki/linux
1669e509ea
'perf stat' accepts some config terms but doesn't apply them. For example: # perf stat -e 'instructions/no-inherit/' -e 'instructions/inherit/' bash # ls # exit Performance counter stats for 'bash': 266258061 instructions/no-inherit/ 266258061 instructions/inherit/ 1.402183915 seconds time elapsed The result is confusing, because user may expect the first 'instructions' event exclude the 'ls' command. This patch forbid most of these config terms for 'perf stat'. Result: # ./perf stat -e 'instructions/no-inherit/' -e 'instructions/inherit/' bash event syntax error: 'instructions/no-inherit/' \___ 'no-inherit' is not usable in 'perf stat' ... We can add blocked config terms back when 'perf stat' really supports them. This patch also removes unavailable config term from error message: # ./perf stat -e 'instructions/badterm/' ls event syntax error: 'instructions/badterm/' \___ unknown term valid terms: config,config1,config2,name # ./perf stat -e 'cpu/badterm/' ls event syntax error: 'cpu/badterm/' \___ unknown term valid terms: pc,any,inv,edge,cmask,event,in_tx,ldlat,umask,in_tx_cp,offcore_rsp,config,config1,config2,name Signed-off-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Cody P Schafer <dev@codyps.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jeremie Galarneau <jeremie.galarneau@efficios.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kirill Smelkov <kirr@nexedi.com> Cc: Li Zefan <lizefan@huawei.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1455882283-79592-11-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2059 lines
51 KiB
C
2059 lines
51 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/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/session.h"
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#include "util/tool.h"
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#include "asm/bug.h"
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#include <stdlib.h>
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#include <sys/prctl.h>
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#include <locale.h>
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#define DEFAULT_SEPARATOR " "
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#define CNTR_NOT_SUPPORTED "<not supported>"
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#define CNTR_NOT_COUNTED "<not counted>"
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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 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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typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
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static int run_count = 1;
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static bool no_inherit = false;
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static volatile pid_t child_pid = -1;
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static bool null_run = false;
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static int detailed_run = 0;
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static bool transaction_run;
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static bool big_num = true;
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static int big_num_opt = -1;
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static const char *csv_sep = NULL;
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static bool csv_output = false;
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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 unsigned int initial_delay = 0;
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static unsigned int unit_width = 4; /* strlen("unit") */
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static bool forever = false;
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static struct timespec ref_time;
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static struct cpu_map *aggr_map;
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static aggr_get_id_t aggr_get_id;
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static bool append_file;
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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_file file;
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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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};
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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 + 1000000000L - 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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perf_evlist__reset_stats(evsel_list);
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perf_stat__reset_shadow_stats();
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}
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static int create_perf_stat_counter(struct perf_evsel *evsel)
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{
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struct perf_event_attr *attr = &evsel->attr;
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if (stat_config.scale)
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attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
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PERF_FORMAT_TOTAL_TIME_RUNNING;
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attr->inherit = !no_inherit;
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/*
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* Some events get initialized with sample_(period/type) set,
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* like tracepoints. Clear it up for counting.
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*/
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attr->sample_period = 0;
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/*
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* But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
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* while avoiding that older tools show confusing messages.
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*
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* However for pipe sessions we need to keep it zero,
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* because script's perf_evsel__check_attr is triggered
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* by attr->sample_type != 0, and we can't run it on
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* stat sessions.
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*/
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if (!(STAT_RECORD && perf_stat.file.is_pipe))
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attr->sample_type = PERF_SAMPLE_IDENTIFIER;
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/*
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* Disabling all counters initially, they will be enabled
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* either manually by us or by kernel via enable_on_exec
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* set later.
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*/
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if (perf_evsel__is_group_leader(evsel)) {
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attr->disabled = 1;
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/*
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* In case of initial_delay we enable tracee
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* events manually.
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*/
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if (target__none(&target) && !initial_delay)
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attr->enable_on_exec = 1;
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}
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if (target__has_cpu(&target))
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return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
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return perf_evsel__open_per_thread(evsel, evsel_list->threads);
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}
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/*
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* Does the counter have nsecs as a unit?
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*/
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static inline int nsec_counter(struct perf_evsel *evsel)
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{
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if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
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perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
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return 1;
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return 0;
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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_file__write(&perf_stat.file, 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 = perf_evsel__nr_cpus(counter);
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int cpu, thread;
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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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if (perf_evsel__read(counter, cpu, thread, count))
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return -1;
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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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}
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}
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return 0;
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}
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static void read_counters(bool close_counters)
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{
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struct perf_evsel *counter;
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evlist__for_each(evsel_list, counter) {
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if (read_counter(counter))
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pr_debug("failed to read counter %s\n", counter->name);
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if (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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if (close_counters) {
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perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
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thread_map__nr(evsel_list->threads));
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}
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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(false);
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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 * NSECS_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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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 (initial_delay)
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usleep(initial_delay * 1000);
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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) || initial_delay)
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perf_evlist__enable(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 has_unit(struct perf_evsel *counter)
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{
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return counter->unit && *counter->unit;
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}
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static bool has_scale(struct perf_evsel *counter)
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{
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return counter->scale != 1;
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}
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static int perf_stat_synthesize_config(bool is_pipe)
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{
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struct perf_evsel *counter;
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int err;
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if (is_pipe) {
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err = perf_event__synthesize_attrs(NULL, perf_stat.session,
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process_synthesized_event);
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if (err < 0) {
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pr_err("Couldn't synthesize attrs.\n");
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return err;
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}
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}
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/*
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* Synthesize other events stuff not carried within
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* attr event - unit, scale, name
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*/
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evlist__for_each(evsel_list, counter) {
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if (!counter->supported)
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continue;
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/*
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* Synthesize unit and scale only if it's defined.
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*/
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if (has_unit(counter)) {
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err = perf_event__synthesize_event_update_unit(NULL, counter, process_synthesized_event);
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if (err < 0) {
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pr_err("Couldn't synthesize evsel unit.\n");
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return err;
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}
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}
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if (has_scale(counter)) {
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err = perf_event__synthesize_event_update_scale(NULL, counter, process_synthesized_event);
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if (err < 0) {
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pr_err("Couldn't synthesize evsel scale.\n");
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return err;
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}
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}
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if (counter->own_cpus) {
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err = perf_event__synthesize_event_update_cpus(NULL, counter, process_synthesized_event);
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if (err < 0) {
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pr_err("Couldn't synthesize evsel scale.\n");
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return err;
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}
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}
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/*
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* Name is needed only for pipe output,
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* perf.data carries event names.
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*/
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if (is_pipe) {
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err = perf_event__synthesize_event_update_name(NULL, counter, process_synthesized_event);
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if (err < 0) {
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pr_err("Couldn't synthesize evsel name.\n");
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return err;
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}
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}
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}
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err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
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process_synthesized_event,
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NULL);
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if (err < 0) {
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pr_err("Couldn't synthesize thread map.\n");
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return err;
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}
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err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
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process_synthesized_event, NULL);
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if (err < 0) {
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pr_err("Couldn't synthesize thread map.\n");
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return err;
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}
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err = perf_event__synthesize_stat_config(NULL, &stat_config,
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process_synthesized_event, NULL);
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if (err < 0) {
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pr_err("Couldn't synthesize config.\n");
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return err;
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}
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return 0;
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}
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#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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static int __store_counter_ids(struct perf_evsel *counter,
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struct cpu_map *cpus,
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struct thread_map *threads)
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{
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int cpu, thread;
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for (cpu = 0; cpu < cpus->nr; cpu++) {
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for (thread = 0; thread < threads->nr; thread++) {
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int fd = FD(counter, cpu, thread);
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if (perf_evlist__id_add_fd(evsel_list, counter,
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cpu, thread, fd) < 0)
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return -1;
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}
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}
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return 0;
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}
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static int store_counter_ids(struct perf_evsel *counter)
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{
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struct cpu_map *cpus = counter->cpus;
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struct thread_map *threads = counter->threads;
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if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
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return -ENOMEM;
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return __store_counter_ids(counter, cpus, threads);
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}
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|
|
static int __run_perf_stat(int argc, const char **argv)
|
|
{
|
|
int interval = stat_config.interval;
|
|
char msg[512];
|
|
unsigned long long t0, t1;
|
|
struct perf_evsel *counter;
|
|
struct timespec ts;
|
|
size_t l;
|
|
int status = 0;
|
|
const bool forks = (argc > 0);
|
|
bool is_pipe = STAT_RECORD ? perf_stat.file.is_pipe : false;
|
|
|
|
if (interval) {
|
|
ts.tv_sec = interval / 1000;
|
|
ts.tv_nsec = (interval % 1000) * 1000000;
|
|
} 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);
|
|
|
|
evlist__for_each(evsel_list, counter) {
|
|
if (create_perf_stat_counter(counter) < 0) {
|
|
/*
|
|
* PPC returns ENXIO for HW counters until 2.6.37
|
|
* (behavior changed with commit b0a873e).
|
|
*/
|
|
if (errno == EINVAL || errno == ENOSYS ||
|
|
errno == ENOENT || errno == EOPNOTSUPP ||
|
|
errno == ENXIO) {
|
|
if (verbose)
|
|
ui__warning("%s event is not supported by the kernel.\n",
|
|
perf_evsel__name(counter));
|
|
counter->supported = false;
|
|
|
|
if ((counter->leader != counter) ||
|
|
!(counter->leader->nr_members > 1))
|
|
continue;
|
|
}
|
|
|
|
perf_evsel__open_strerror(counter, &target,
|
|
errno, msg, sizeof(msg));
|
|
ui__error("%s\n", msg);
|
|
|
|
if (child_pid != -1)
|
|
kill(child_pid, SIGTERM);
|
|
|
|
return -1;
|
|
}
|
|
counter->supported = true;
|
|
|
|
l = strlen(counter->unit);
|
|
if (l > unit_width)
|
|
unit_width = l;
|
|
|
|
if (STAT_RECORD && store_counter_ids(counter))
|
|
return -1;
|
|
}
|
|
|
|
if (perf_evlist__apply_filters(evsel_list, &counter)) {
|
|
error("failed to set filter \"%s\" on event %s with %d (%s)\n",
|
|
counter->filter, perf_evsel__name(counter), errno,
|
|
strerror_r(errno, msg, sizeof(msg)));
|
|
return -1;
|
|
}
|
|
|
|
if (STAT_RECORD) {
|
|
int err, fd = perf_data_file__fd(&perf_stat.file);
|
|
|
|
if (is_pipe) {
|
|
err = perf_header__write_pipe(perf_data_file__fd(&perf_stat.file));
|
|
} else {
|
|
err = perf_session__write_header(perf_stat.session, evsel_list,
|
|
fd, false);
|
|
}
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = perf_stat_synthesize_config(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) {
|
|
while (!waitpid(child_pid, &status, WNOHANG)) {
|
|
nanosleep(&ts, NULL);
|
|
process_interval();
|
|
}
|
|
}
|
|
wait(&status);
|
|
|
|
if (workload_exec_errno) {
|
|
const char *emsg = strerror_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 (interval)
|
|
process_interval();
|
|
}
|
|
}
|
|
|
|
t1 = rdclock();
|
|
|
|
update_stats(&walltime_nsecs_stats, t1 - t0);
|
|
|
|
read_counters(true);
|
|
|
|
return WEXITSTATUS(status);
|
|
}
|
|
|
|
static int run_perf_stat(int argc, const char **argv)
|
|
{
|
|
int ret;
|
|
|
|
if (pre_cmd) {
|
|
ret = system(pre_cmd);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (sync_run)
|
|
sync();
|
|
|
|
ret = __run_perf_stat(argc, argv);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (post_cmd) {
|
|
ret = system(post_cmd);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void print_running(u64 run, u64 ena)
|
|
{
|
|
if (csv_output) {
|
|
fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
|
|
csv_sep,
|
|
run,
|
|
csv_sep,
|
|
ena ? 100.0 * run / ena : 100.0);
|
|
} else if (run != ena) {
|
|
fprintf(stat_config.output, " (%.2f%%)", 100.0 * run / ena);
|
|
}
|
|
}
|
|
|
|
static void print_noise_pct(double total, double avg)
|
|
{
|
|
double pct = rel_stddev_stats(total, avg);
|
|
|
|
if (csv_output)
|
|
fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
|
|
else if (pct)
|
|
fprintf(stat_config.output, " ( +-%6.2f%% )", pct);
|
|
}
|
|
|
|
static void print_noise(struct perf_evsel *evsel, double avg)
|
|
{
|
|
struct perf_stat_evsel *ps;
|
|
|
|
if (run_count == 1)
|
|
return;
|
|
|
|
ps = evsel->priv;
|
|
print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
|
|
}
|
|
|
|
static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
|
|
{
|
|
switch (stat_config.aggr_mode) {
|
|
case AGGR_CORE:
|
|
fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
|
|
cpu_map__id_to_socket(id),
|
|
csv_output ? 0 : -8,
|
|
cpu_map__id_to_cpu(id),
|
|
csv_sep,
|
|
csv_output ? 0 : 4,
|
|
nr,
|
|
csv_sep);
|
|
break;
|
|
case AGGR_SOCKET:
|
|
fprintf(stat_config.output, "S%*d%s%*d%s",
|
|
csv_output ? 0 : -5,
|
|
id,
|
|
csv_sep,
|
|
csv_output ? 0 : 4,
|
|
nr,
|
|
csv_sep);
|
|
break;
|
|
case AGGR_NONE:
|
|
fprintf(stat_config.output, "CPU%*d%s",
|
|
csv_output ? 0 : -4,
|
|
perf_evsel__cpus(evsel)->map[id], csv_sep);
|
|
break;
|
|
case AGGR_THREAD:
|
|
fprintf(stat_config.output, "%*s-%*d%s",
|
|
csv_output ? 0 : 16,
|
|
thread_map__comm(evsel->threads, id),
|
|
csv_output ? 0 : -8,
|
|
thread_map__pid(evsel->threads, id),
|
|
csv_sep);
|
|
break;
|
|
case AGGR_GLOBAL:
|
|
case AGGR_UNSET:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
struct outstate {
|
|
FILE *fh;
|
|
bool newline;
|
|
const char *prefix;
|
|
};
|
|
|
|
#define METRIC_LEN 35
|
|
|
|
static void new_line_std(void *ctx)
|
|
{
|
|
struct outstate *os = ctx;
|
|
|
|
os->newline = true;
|
|
}
|
|
|
|
static void do_new_line_std(struct outstate *os)
|
|
{
|
|
fputc('\n', os->fh);
|
|
fputs(os->prefix, os->fh);
|
|
if (stat_config.aggr_mode == AGGR_NONE)
|
|
fprintf(os->fh, " ");
|
|
if (stat_config.aggr_mode == AGGR_CORE)
|
|
fprintf(os->fh, " ");
|
|
if (stat_config.aggr_mode == AGGR_SOCKET)
|
|
fprintf(os->fh, " ");
|
|
fprintf(os->fh, " ");
|
|
}
|
|
|
|
static void print_metric_std(void *ctx, const char *color, const char *fmt,
|
|
const char *unit, double val)
|
|
{
|
|
struct outstate *os = ctx;
|
|
FILE *out = os->fh;
|
|
int n;
|
|
bool newline = os->newline;
|
|
|
|
os->newline = false;
|
|
|
|
if (unit == NULL || fmt == NULL) {
|
|
fprintf(out, "%-*s", METRIC_LEN, "");
|
|
return;
|
|
}
|
|
|
|
if (newline)
|
|
do_new_line_std(os);
|
|
|
|
n = fprintf(out, " # ");
|
|
if (color)
|
|
n += color_fprintf(out, color, fmt, val);
|
|
else
|
|
n += fprintf(out, fmt, val);
|
|
fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
|
|
}
|
|
|
|
static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
double msecs = avg / 1e6;
|
|
const char *fmt_v, *fmt_n;
|
|
char name[25];
|
|
|
|
fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
|
|
fmt_n = csv_output ? "%s" : "%-25s";
|
|
|
|
aggr_printout(evsel, id, nr);
|
|
|
|
scnprintf(name, sizeof(name), "%s%s",
|
|
perf_evsel__name(evsel), csv_output ? "" : " (msec)");
|
|
|
|
fprintf(output, fmt_v, msecs, csv_sep);
|
|
|
|
if (csv_output)
|
|
fprintf(output, "%s%s", evsel->unit, csv_sep);
|
|
else
|
|
fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
|
|
|
|
fprintf(output, fmt_n, name);
|
|
|
|
if (evsel->cgrp)
|
|
fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
|
|
}
|
|
|
|
static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
double sc = evsel->scale;
|
|
const char *fmt;
|
|
|
|
if (csv_output) {
|
|
fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s";
|
|
} else {
|
|
if (big_num)
|
|
fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
|
|
else
|
|
fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
|
|
}
|
|
|
|
aggr_printout(evsel, id, nr);
|
|
|
|
fprintf(output, fmt, avg, csv_sep);
|
|
|
|
if (evsel->unit)
|
|
fprintf(output, "%-*s%s",
|
|
csv_output ? 0 : unit_width,
|
|
evsel->unit, csv_sep);
|
|
|
|
fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
|
|
|
|
if (evsel->cgrp)
|
|
fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
|
|
}
|
|
|
|
static void printout(int id, int nr, struct perf_evsel *counter, double uval,
|
|
char *prefix, u64 run, u64 ena, double noise)
|
|
{
|
|
struct perf_stat_output_ctx out;
|
|
struct outstate os = {
|
|
.fh = stat_config.output,
|
|
.prefix = prefix ? prefix : ""
|
|
};
|
|
print_metric_t pm = print_metric_std;
|
|
void (*nl)(void *);
|
|
|
|
nl = new_line_std;
|
|
|
|
if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
|
|
aggr_printout(counter, id, nr);
|
|
|
|
fprintf(stat_config.output, "%*s%s",
|
|
csv_output ? 0 : 18,
|
|
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
|
|
csv_sep);
|
|
|
|
fprintf(stat_config.output, "%-*s%s",
|
|
csv_output ? 0 : unit_width,
|
|
counter->unit, csv_sep);
|
|
|
|
fprintf(stat_config.output, "%*s",
|
|
csv_output ? 0 : -25,
|
|
perf_evsel__name(counter));
|
|
|
|
if (counter->cgrp)
|
|
fprintf(stat_config.output, "%s%s",
|
|
csv_sep, counter->cgrp->name);
|
|
|
|
print_running(run, ena);
|
|
return;
|
|
}
|
|
|
|
if (nsec_counter(counter))
|
|
nsec_printout(id, nr, counter, uval);
|
|
else
|
|
abs_printout(id, nr, counter, uval);
|
|
|
|
out.print_metric = pm;
|
|
out.new_line = nl;
|
|
out.ctx = &os;
|
|
|
|
if (!csv_output)
|
|
perf_stat__print_shadow_stats(counter, uval,
|
|
stat_config.aggr_mode == AGGR_GLOBAL ? 0 :
|
|
cpu_map__id_to_cpu(id),
|
|
&out);
|
|
|
|
print_noise(counter, noise);
|
|
print_running(run, ena);
|
|
}
|
|
|
|
static void print_aggr(char *prefix)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
struct perf_evsel *counter;
|
|
int cpu, s, s2, id, nr;
|
|
double uval;
|
|
u64 ena, run, val;
|
|
|
|
if (!(aggr_map || aggr_get_id))
|
|
return;
|
|
|
|
for (s = 0; s < aggr_map->nr; s++) {
|
|
id = aggr_map->map[s];
|
|
evlist__for_each(evsel_list, counter) {
|
|
val = ena = run = 0;
|
|
nr = 0;
|
|
for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
|
|
s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
|
|
if (s2 != id)
|
|
continue;
|
|
val += perf_counts(counter->counts, cpu, 0)->val;
|
|
ena += perf_counts(counter->counts, cpu, 0)->ena;
|
|
run += perf_counts(counter->counts, cpu, 0)->run;
|
|
nr++;
|
|
}
|
|
if (prefix)
|
|
fprintf(output, "%s", prefix);
|
|
|
|
uval = val * counter->scale;
|
|
printout(id, nr, counter, uval, prefix, run, ena, 1.0);
|
|
fputc('\n', output);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
int nthreads = thread_map__nr(counter->threads);
|
|
int ncpus = cpu_map__nr(counter->cpus);
|
|
int cpu, thread;
|
|
double uval;
|
|
|
|
for (thread = 0; thread < nthreads; thread++) {
|
|
u64 ena = 0, run = 0, val = 0;
|
|
|
|
for (cpu = 0; cpu < ncpus; cpu++) {
|
|
val += perf_counts(counter->counts, cpu, thread)->val;
|
|
ena += perf_counts(counter->counts, cpu, thread)->ena;
|
|
run += perf_counts(counter->counts, cpu, thread)->run;
|
|
}
|
|
|
|
if (prefix)
|
|
fprintf(output, "%s", prefix);
|
|
|
|
uval = val * counter->scale;
|
|
printout(thread, 0, counter, uval, prefix, run, ena, 1.0);
|
|
fputc('\n', output);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print out the results of a single counter:
|
|
* aggregated counts in system-wide mode
|
|
*/
|
|
static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
struct perf_stat_evsel *ps = counter->priv;
|
|
double avg = avg_stats(&ps->res_stats[0]);
|
|
double uval;
|
|
double avg_enabled, avg_running;
|
|
|
|
avg_enabled = avg_stats(&ps->res_stats[1]);
|
|
avg_running = avg_stats(&ps->res_stats[2]);
|
|
|
|
if (prefix)
|
|
fprintf(output, "%s", prefix);
|
|
|
|
uval = avg * counter->scale;
|
|
printout(-1, 0, counter, uval, prefix, avg_running, avg_enabled, avg);
|
|
fprintf(output, "\n");
|
|
}
|
|
|
|
/*
|
|
* Print out the results of a single counter:
|
|
* does not use aggregated count in system-wide
|
|
*/
|
|
static void print_counter(struct perf_evsel *counter, char *prefix)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
u64 ena, run, val;
|
|
double uval;
|
|
int cpu;
|
|
|
|
for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
|
|
val = perf_counts(counter->counts, cpu, 0)->val;
|
|
ena = perf_counts(counter->counts, cpu, 0)->ena;
|
|
run = perf_counts(counter->counts, cpu, 0)->run;
|
|
|
|
if (prefix)
|
|
fprintf(output, "%s", prefix);
|
|
|
|
uval = val * counter->scale;
|
|
printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
|
|
|
|
fputc('\n', output);
|
|
}
|
|
}
|
|
|
|
static void print_interval(char *prefix, struct timespec *ts)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
static int num_print_interval;
|
|
|
|
sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
|
|
|
|
if (num_print_interval == 0 && !csv_output) {
|
|
switch (stat_config.aggr_mode) {
|
|
case AGGR_SOCKET:
|
|
fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
|
|
break;
|
|
case AGGR_CORE:
|
|
fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
|
|
break;
|
|
case AGGR_NONE:
|
|
fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
|
|
break;
|
|
case AGGR_THREAD:
|
|
fprintf(output, "# time comm-pid counts %*s events\n", unit_width, "unit");
|
|
break;
|
|
case AGGR_GLOBAL:
|
|
default:
|
|
fprintf(output, "# time counts %*s events\n", unit_width, "unit");
|
|
case AGGR_UNSET:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (++num_print_interval == 25)
|
|
num_print_interval = 0;
|
|
}
|
|
|
|
static void print_header(int argc, const char **argv)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
int i;
|
|
|
|
fflush(stdout);
|
|
|
|
if (!csv_output) {
|
|
fprintf(output, "\n");
|
|
fprintf(output, " Performance counter stats for ");
|
|
if (target.system_wide)
|
|
fprintf(output, "\'system wide");
|
|
else if (target.cpu_list)
|
|
fprintf(output, "\'CPU(s) %s", target.cpu_list);
|
|
else if (!target__has_task(&target)) {
|
|
fprintf(output, "\'%s", argv ? argv[0] : "pipe");
|
|
for (i = 1; argv && (i < argc); i++)
|
|
fprintf(output, " %s", argv[i]);
|
|
} else if (target.pid)
|
|
fprintf(output, "process id \'%s", target.pid);
|
|
else
|
|
fprintf(output, "thread id \'%s", target.tid);
|
|
|
|
fprintf(output, "\'");
|
|
if (run_count > 1)
|
|
fprintf(output, " (%d runs)", run_count);
|
|
fprintf(output, ":\n\n");
|
|
}
|
|
}
|
|
|
|
static void print_footer(void)
|
|
{
|
|
FILE *output = stat_config.output;
|
|
|
|
if (!null_run)
|
|
fprintf(output, "\n");
|
|
fprintf(output, " %17.9f seconds time elapsed",
|
|
avg_stats(&walltime_nsecs_stats)/1e9);
|
|
if (run_count > 1) {
|
|
fprintf(output, " ");
|
|
print_noise_pct(stddev_stats(&walltime_nsecs_stats),
|
|
avg_stats(&walltime_nsecs_stats));
|
|
}
|
|
fprintf(output, "\n\n");
|
|
}
|
|
|
|
static void print_counters(struct timespec *ts, int argc, const char **argv)
|
|
{
|
|
int interval = stat_config.interval;
|
|
struct perf_evsel *counter;
|
|
char buf[64], *prefix = NULL;
|
|
|
|
/* Do not print anything if we record to the pipe. */
|
|
if (STAT_RECORD && perf_stat.file.is_pipe)
|
|
return;
|
|
|
|
if (interval)
|
|
print_interval(prefix = buf, ts);
|
|
else
|
|
print_header(argc, argv);
|
|
|
|
switch (stat_config.aggr_mode) {
|
|
case AGGR_CORE:
|
|
case AGGR_SOCKET:
|
|
print_aggr(prefix);
|
|
break;
|
|
case AGGR_THREAD:
|
|
evlist__for_each(evsel_list, counter)
|
|
print_aggr_thread(counter, prefix);
|
|
break;
|
|
case AGGR_GLOBAL:
|
|
evlist__for_each(evsel_list, counter)
|
|
print_counter_aggr(counter, prefix);
|
|
break;
|
|
case AGGR_NONE:
|
|
evlist__for_each(evsel_list, counter)
|
|
print_counter(counter, prefix);
|
|
break;
|
|
case AGGR_UNSET:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!interval && !csv_output)
|
|
print_footer();
|
|
|
|
fflush(stat_config.output);
|
|
}
|
|
|
|
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 const 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", &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", &run_count,
|
|
"repeat command and print average + stddev (max: 100, forever: 0)"),
|
|
OPT_BOOLEAN('n', "null", &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_STRING('x', "field-separator", &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 (>= 10)"),
|
|
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", &initial_delay,
|
|
"ms to wait before starting measurement after program start"),
|
|
OPT_END()
|
|
};
|
|
|
|
static int perf_stat__get_socket(struct cpu_map *map, int cpu)
|
|
{
|
|
return cpu_map__get_socket(map, cpu, NULL);
|
|
}
|
|
|
|
static int perf_stat__get_core(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 struct cpu_map *cpus_aggr_map;
|
|
|
|
static int perf_stat__get_aggr(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 (cpus_aggr_map->map[cpu] == -1)
|
|
cpus_aggr_map->map[cpu] = get_id(map, idx);
|
|
|
|
return cpus_aggr_map->map[cpu];
|
|
}
|
|
|
|
static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
|
|
{
|
|
return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
|
|
}
|
|
|
|
static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
|
|
{
|
|
return perf_stat__get_aggr(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, &aggr_map)) {
|
|
perror("cannot build socket map");
|
|
return -1;
|
|
}
|
|
aggr_get_id = perf_stat__get_socket_cached;
|
|
break;
|
|
case AGGR_CORE:
|
|
if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
|
|
perror("cannot build core map");
|
|
return -1;
|
|
}
|
|
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);
|
|
cpus_aggr_map = cpu_map__empty_new(nr + 1);
|
|
return cpus_aggr_map ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static void perf_stat__exit_aggr_mode(void)
|
|
{
|
|
cpu_map__put(aggr_map);
|
|
cpu_map__put(cpus_aggr_map);
|
|
aggr_map = NULL;
|
|
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_online)
|
|
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 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 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, &aggr_map)) {
|
|
perror("cannot build socket map");
|
|
return -1;
|
|
}
|
|
aggr_get_id = perf_stat__get_socket_file;
|
|
break;
|
|
case AGGR_CORE:
|
|
if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
|
|
perror("cannot build core map");
|
|
return -1;
|
|
}
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
struct perf_event_attr default_attrs[] = {
|
|
|
|
{ .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 },
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
|
|
{ .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) },
|
|
};
|
|
|
|
/* Set attrs if no event is selected and !null_run: */
|
|
if (null_run)
|
|
return 0;
|
|
|
|
if (transaction_run) {
|
|
int err;
|
|
if (pmu_have_event("cpu", "cycles-ct") &&
|
|
pmu_have_event("cpu", "el-start"))
|
|
err = parse_events(evsel_list, transaction_attrs, NULL);
|
|
else
|
|
err = parse_events(evsel_list, transaction_limited_attrs, NULL);
|
|
if (err) {
|
|
fprintf(stderr, "Cannot set up transaction events\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (!evsel_list->nr_entries) {
|
|
if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 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_file *file = &perf_stat.file;
|
|
|
|
argc = parse_options(argc, argv, stat_options, stat_record_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
if (output_name)
|
|
file->path = output_name;
|
|
|
|
if (run_count != 1 || forever) {
|
|
pr_err("Cannot use -r option with perf stat record.\n");
|
|
return -1;
|
|
}
|
|
|
|
session = perf_session__new(file, 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_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
struct stat_round_event *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(evsel_list, counter)
|
|
perf_stat_process_counter(&stat_config, counter);
|
|
|
|
if (round->type == PERF_STAT_ROUND_TYPE__FINAL)
|
|
update_stats(&walltime_nsecs_stats, round->time);
|
|
|
|
if (stat_config.interval && round->time) {
|
|
tsh.tv_sec = round->time / NSECS_PER_SEC;
|
|
tsh.tv_nsec = round->time % NSECS_PER_SEC;
|
|
ts = &tsh;
|
|
}
|
|
|
|
print_counters(ts, argc, argv);
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int process_stat_config_event(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session __maybe_unused)
|
|
{
|
|
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.file.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_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session __maybe_unused)
|
|
{
|
|
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_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session __maybe_unused)
|
|
{
|
|
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 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.file.path = input_name;
|
|
perf_stat.file.mode = PERF_DATA_MODE_READ;
|
|
|
|
session = perf_session__new(&perf_stat.file, 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;
|
|
}
|
|
|
|
int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
|
|
{
|
|
const char * const stat_usage[] = {
|
|
"perf stat [<options>] [<command>]",
|
|
NULL
|
|
};
|
|
int status = -EINVAL, run_idx;
|
|
const char *mode;
|
|
FILE *output = stderr;
|
|
unsigned int interval;
|
|
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();
|
|
argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
|
|
(const char **) stat_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
if (csv_sep) {
|
|
csv_output = true;
|
|
if (!strcmp(csv_sep, "\\t"))
|
|
csv_sep = "\t";
|
|
} else
|
|
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;
|
|
|
|
/*
|
|
* 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 (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 (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 */
|
|
big_num = false;
|
|
} else if (big_num_opt == 0) /* User passed --no-big-num */
|
|
big_num = false;
|
|
|
|
if (!argc && target__none(&target))
|
|
usage_with_options(stat_usage, stat_options);
|
|
|
|
if (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 (run_count == 0) {
|
|
forever = true;
|
|
run_count = 1;
|
|
}
|
|
|
|
if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
|
|
fprintf(stderr, "The --per-thread option is only available "
|
|
"when monitoring via -p -t options.\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 (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 (interval && interval < 100) {
|
|
if (interval < 10) {
|
|
pr_err("print interval must be >= 10ms\n");
|
|
parse_options_usage(stat_usage, stat_options, "I", 1);
|
|
goto out;
|
|
} else
|
|
pr_warning("print interval < 100ms. "
|
|
"The overhead percentage could be high in some cases. "
|
|
"Please proceed with caution.\n");
|
|
}
|
|
|
|
if (perf_evlist__alloc_stats(evsel_list, interval))
|
|
goto out;
|
|
|
|
if (perf_stat_init_aggr_mode())
|
|
goto out;
|
|
|
|
/*
|
|
* 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 < run_count; run_idx++) {
|
|
if (run_count != 1 && verbose)
|
|
fprintf(output, "[ perf stat: executing run #%d ... ]\n",
|
|
run_idx + 1);
|
|
|
|
status = run_perf_stat(argc, argv);
|
|
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_file__fd(&perf_stat.file);
|
|
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.file.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:
|
|
perf_evlist__delete(evsel_list);
|
|
return status;
|
|
}
|