![David Ahern](/assets/img/avatar_default.png)
Allow a user to collect events for multiple threads or processes using a comma separated list. e.g., collect data on a VM and its vhost thread: perf top -p 21483,21485 perf stat -p 21483,21485 -ddd perf record -p 21483,21485 or monitoring vcpu threads perf top -t 21488,21489 perf stat -t 21488,21489 -ddd perf record -t 21488,21489 Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1328718772-16688-1-git-send-email-dsahern@gmail.com Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1269 lines
33 KiB
C
1269 lines
33 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/util.h"
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#include "util/parse-options.h"
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#include "util/parse-events.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/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 <sys/prctl.h>
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#include <math.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 struct perf_event_attr default_attrs[] = {
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{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
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{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
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{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
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{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
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{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
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};
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/*
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* Detailed stats (-d), covering the L1 and last level data caches:
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*/
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static struct perf_event_attr detailed_attrs[] = {
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_L1D << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_L1D << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_LL << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_LL << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
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};
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/*
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* Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
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*/
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static struct perf_event_attr very_detailed_attrs[] = {
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_L1I << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_L1I << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_DTLB << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_DTLB << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_ITLB << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_ITLB << 0 |
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(PERF_COUNT_HW_CACHE_OP_READ << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
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};
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/*
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* Very, very detailed stats (-d -d -d), adding prefetch events:
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*/
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static struct perf_event_attr very_very_detailed_attrs[] = {
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_L1D << 0 |
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(PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_L1D << 0 |
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(PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
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(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
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};
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struct perf_evlist *evsel_list;
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static bool system_wide = false;
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static int run_idx = 0;
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static int run_count = 1;
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static bool no_inherit = false;
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static bool scale = true;
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static bool no_aggr = false;
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static const char *target_pid;
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static const char *target_tid;
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static 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 sync_run = false;
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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 *cpu_list;
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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 *output_name = NULL;
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static FILE *output = NULL;
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static int output_fd;
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static volatile int done = 0;
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struct stats
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{
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double n, mean, M2;
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};
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struct perf_stat {
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struct stats res_stats[3];
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};
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static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
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{
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evsel->priv = zalloc(sizeof(struct perf_stat));
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return evsel->priv == NULL ? -ENOMEM : 0;
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}
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static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
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{
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free(evsel->priv);
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evsel->priv = NULL;
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}
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static void update_stats(struct stats *stats, u64 val)
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{
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double delta;
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stats->n++;
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delta = val - stats->mean;
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stats->mean += delta / stats->n;
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stats->M2 += delta*(val - stats->mean);
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}
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static double avg_stats(struct stats *stats)
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{
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return stats->mean;
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}
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/*
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* http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
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*
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* (\Sum n_i^2) - ((\Sum n_i)^2)/n
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* s^2 = -------------------------------
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* n - 1
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*
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* http://en.wikipedia.org/wiki/Stddev
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*
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* The std dev of the mean is related to the std dev by:
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*
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* s
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* s_mean = -------
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* sqrt(n)
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*
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*/
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static double stddev_stats(struct stats *stats)
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{
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double variance, variance_mean;
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if (!stats->n)
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return 0.0;
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variance = stats->M2 / (stats->n - 1);
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variance_mean = variance / stats->n;
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return sqrt(variance_mean);
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}
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struct stats runtime_nsecs_stats[MAX_NR_CPUS];
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struct stats runtime_cycles_stats[MAX_NR_CPUS];
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struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
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struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
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struct stats runtime_branches_stats[MAX_NR_CPUS];
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struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
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struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
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struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
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struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
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struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
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struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
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struct stats walltime_nsecs_stats;
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static int create_perf_stat_counter(struct perf_evsel *evsel,
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struct perf_evsel *first)
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{
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struct perf_event_attr *attr = &evsel->attr;
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struct xyarray *group_fd = NULL;
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if (group && evsel != first)
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group_fd = first->fd;
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if (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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if (system_wide)
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return perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
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group, group_fd);
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if (!target_pid && !target_tid) {
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attr->disabled = 1;
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attr->enable_on_exec = 1;
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}
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return perf_evsel__open_per_thread(evsel, evsel_list->threads,
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group, group_fd);
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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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/*
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* Update various tracking values we maintain to print
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* more semantic information such as miss/hit ratios,
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* instruction rates, etc:
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*/
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static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
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{
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if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
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update_stats(&runtime_nsecs_stats[0], count[0]);
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else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
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update_stats(&runtime_cycles_stats[0], count[0]);
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else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
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update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
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else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
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update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
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else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
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update_stats(&runtime_branches_stats[0], count[0]);
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else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
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update_stats(&runtime_cacherefs_stats[0], count[0]);
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else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
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update_stats(&runtime_l1_dcache_stats[0], count[0]);
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else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
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update_stats(&runtime_l1_icache_stats[0], count[0]);
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else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
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update_stats(&runtime_ll_cache_stats[0], count[0]);
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else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
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update_stats(&runtime_dtlb_cache_stats[0], count[0]);
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else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
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update_stats(&runtime_itlb_cache_stats[0], count[0]);
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}
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/*
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* Read out the results of a single counter:
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* aggregate counts across CPUs in system-wide mode
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*/
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static int read_counter_aggr(struct perf_evsel *counter)
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{
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struct perf_stat *ps = counter->priv;
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u64 *count = counter->counts->aggr.values;
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int i;
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if (__perf_evsel__read(counter, evsel_list->cpus->nr,
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evsel_list->threads->nr, scale) < 0)
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return -1;
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for (i = 0; i < 3; i++)
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update_stats(&ps->res_stats[i], count[i]);
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if (verbose) {
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fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
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event_name(counter), count[0], count[1], count[2]);
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}
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/*
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* Save the full runtime - to allow normalization during printout:
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*/
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update_shadow_stats(counter, count);
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return 0;
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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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u64 *count;
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int cpu;
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for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
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if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
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return -1;
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count = counter->counts->cpu[cpu].values;
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update_shadow_stats(counter, count);
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}
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return 0;
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}
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static int run_perf_stat(int argc __used, const char **argv)
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{
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unsigned long long t0, t1;
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struct perf_evsel *counter, *first;
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int status = 0;
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int child_ready_pipe[2], go_pipe[2];
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const bool forks = (argc > 0);
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char buf;
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if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
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perror("failed to create pipes");
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exit(1);
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}
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if (forks) {
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if ((child_pid = fork()) < 0)
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perror("failed to fork");
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if (!child_pid) {
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close(child_ready_pipe[0]);
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close(go_pipe[1]);
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fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
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/*
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* Do a dummy execvp to get the PLT entry resolved,
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* so we avoid the resolver overhead on the real
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* execvp call.
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*/
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execvp("", (char **)argv);
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/*
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* Tell the parent we're ready to go
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*/
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close(child_ready_pipe[1]);
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/*
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* Wait until the parent tells us to go.
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*/
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if (read(go_pipe[0], &buf, 1) == -1)
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perror("unable to read pipe");
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execvp(argv[0], (char **)argv);
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perror(argv[0]);
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exit(-1);
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}
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if (!target_tid && !target_pid && !system_wide)
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evsel_list->threads->map[0] = child_pid;
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/*
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* Wait for the child to be ready to exec.
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*/
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close(child_ready_pipe[1]);
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close(go_pipe[0]);
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if (read(child_ready_pipe[0], &buf, 1) == -1)
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perror("unable to read pipe");
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close(child_ready_pipe[0]);
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}
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first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
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list_for_each_entry(counter, &evsel_list->entries, node) {
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if (create_perf_stat_counter(counter, first) < 0) {
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if (errno == EINVAL || errno == ENOSYS ||
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errno == ENOENT || errno == EOPNOTSUPP) {
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if (verbose)
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ui__warning("%s event is not supported by the kernel.\n",
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event_name(counter));
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counter->supported = false;
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continue;
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}
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|
|
if (errno == EPERM || errno == EACCES) {
|
|
error("You may not have permission to collect %sstats.\n"
|
|
"\t Consider tweaking"
|
|
" /proc/sys/kernel/perf_event_paranoid or running as root.",
|
|
system_wide ? "system-wide " : "");
|
|
} else {
|
|
error("open_counter returned with %d (%s). "
|
|
"/bin/dmesg may provide additional information.\n",
|
|
errno, strerror(errno));
|
|
}
|
|
if (child_pid != -1)
|
|
kill(child_pid, SIGTERM);
|
|
die("Not all events could be opened.\n");
|
|
return -1;
|
|
}
|
|
counter->supported = true;
|
|
}
|
|
|
|
if (perf_evlist__set_filters(evsel_list)) {
|
|
error("failed to set filter with %d (%s)\n", errno,
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Enable counters and exec the command:
|
|
*/
|
|
t0 = rdclock();
|
|
|
|
if (forks) {
|
|
close(go_pipe[1]);
|
|
wait(&status);
|
|
if (WIFSIGNALED(status))
|
|
psignal(WTERMSIG(status), argv[0]);
|
|
} else {
|
|
while(!done) sleep(1);
|
|
}
|
|
|
|
t1 = rdclock();
|
|
|
|
update_stats(&walltime_nsecs_stats, t1 - t0);
|
|
|
|
if (no_aggr) {
|
|
list_for_each_entry(counter, &evsel_list->entries, node) {
|
|
read_counter(counter);
|
|
perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
|
|
}
|
|
} else {
|
|
list_for_each_entry(counter, &evsel_list->entries, node) {
|
|
read_counter_aggr(counter);
|
|
perf_evsel__close_fd(counter, evsel_list->cpus->nr,
|
|
evsel_list->threads->nr);
|
|
}
|
|
}
|
|
|
|
return WEXITSTATUS(status);
|
|
}
|
|
|
|
static void print_noise_pct(double total, double avg)
|
|
{
|
|
double pct = 0.0;
|
|
|
|
if (avg)
|
|
pct = 100.0*total/avg;
|
|
|
|
if (csv_output)
|
|
fprintf(output, "%s%.2f%%", csv_sep, pct);
|
|
else if (pct)
|
|
fprintf(output, " ( +-%6.2f%% )", pct);
|
|
}
|
|
|
|
static void print_noise(struct perf_evsel *evsel, double avg)
|
|
{
|
|
struct perf_stat *ps;
|
|
|
|
if (run_count == 1)
|
|
return;
|
|
|
|
ps = evsel->priv;
|
|
print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
|
|
}
|
|
|
|
static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
|
|
{
|
|
double msecs = avg / 1e6;
|
|
char cpustr[16] = { '\0', };
|
|
const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
|
|
|
|
if (no_aggr)
|
|
sprintf(cpustr, "CPU%*d%s",
|
|
csv_output ? 0 : -4,
|
|
evsel_list->cpus->map[cpu], csv_sep);
|
|
|
|
fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
|
|
|
|
if (evsel->cgrp)
|
|
fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
|
|
|
|
if (csv_output)
|
|
return;
|
|
|
|
if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
|
|
fprintf(output, " # %8.3f CPUs utilized ",
|
|
avg / avg_stats(&walltime_nsecs_stats));
|
|
else
|
|
fprintf(output, " ");
|
|
}
|
|
|
|
/* used for get_ratio_color() */
|
|
enum grc_type {
|
|
GRC_STALLED_CYCLES_FE,
|
|
GRC_STALLED_CYCLES_BE,
|
|
GRC_CACHE_MISSES,
|
|
GRC_MAX_NR
|
|
};
|
|
|
|
static const char *get_ratio_color(enum grc_type type, double ratio)
|
|
{
|
|
static const double grc_table[GRC_MAX_NR][3] = {
|
|
[GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
|
|
[GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
|
|
[GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
|
|
};
|
|
const char *color = PERF_COLOR_NORMAL;
|
|
|
|
if (ratio > grc_table[type][0])
|
|
color = PERF_COLOR_RED;
|
|
else if (ratio > grc_table[type][1])
|
|
color = PERF_COLOR_MAGENTA;
|
|
else if (ratio > grc_table[type][2])
|
|
color = PERF_COLOR_YELLOW;
|
|
|
|
return color;
|
|
}
|
|
|
|
static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
const char *color;
|
|
|
|
total = avg_stats(&runtime_cycles_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total * 100.0;
|
|
|
|
color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
|
|
|
|
fprintf(output, " # ");
|
|
color_fprintf(output, color, "%6.2f%%", ratio);
|
|
fprintf(output, " frontend cycles idle ");
|
|
}
|
|
|
|
static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
const char *color;
|
|
|
|
total = avg_stats(&runtime_cycles_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total * 100.0;
|
|
|
|
color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
|
|
|
|
fprintf(output, " # ");
|
|
color_fprintf(output, color, "%6.2f%%", ratio);
|
|
fprintf(output, " backend cycles idle ");
|
|
}
|
|
|
|
static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
const char *color;
|
|
|
|
total = avg_stats(&runtime_branches_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total * 100.0;
|
|
|
|
color = get_ratio_color(GRC_CACHE_MISSES, ratio);
|
|
|
|
fprintf(output, " # ");
|
|
color_fprintf(output, color, "%6.2f%%", ratio);
|
|
fprintf(output, " of all branches ");
|
|
}
|
|
|
|
static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
const char *color;
|
|
|
|
total = avg_stats(&runtime_l1_dcache_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total * 100.0;
|
|
|
|
color = get_ratio_color(GRC_CACHE_MISSES, ratio);
|
|
|
|
fprintf(output, " # ");
|
|
color_fprintf(output, color, "%6.2f%%", ratio);
|
|
fprintf(output, " of all L1-dcache hits ");
|
|
}
|
|
|
|
static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
const char *color;
|
|
|
|
total = avg_stats(&runtime_l1_icache_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total * 100.0;
|
|
|
|
color = get_ratio_color(GRC_CACHE_MISSES, ratio);
|
|
|
|
fprintf(output, " # ");
|
|
color_fprintf(output, color, "%6.2f%%", ratio);
|
|
fprintf(output, " of all L1-icache hits ");
|
|
}
|
|
|
|
static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
const char *color;
|
|
|
|
total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total * 100.0;
|
|
|
|
color = get_ratio_color(GRC_CACHE_MISSES, ratio);
|
|
|
|
fprintf(output, " # ");
|
|
color_fprintf(output, color, "%6.2f%%", ratio);
|
|
fprintf(output, " of all dTLB cache hits ");
|
|
}
|
|
|
|
static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
const char *color;
|
|
|
|
total = avg_stats(&runtime_itlb_cache_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total * 100.0;
|
|
|
|
color = get_ratio_color(GRC_CACHE_MISSES, ratio);
|
|
|
|
fprintf(output, " # ");
|
|
color_fprintf(output, color, "%6.2f%%", ratio);
|
|
fprintf(output, " of all iTLB cache hits ");
|
|
}
|
|
|
|
static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
const char *color;
|
|
|
|
total = avg_stats(&runtime_ll_cache_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total * 100.0;
|
|
|
|
color = get_ratio_color(GRC_CACHE_MISSES, ratio);
|
|
|
|
fprintf(output, " # ");
|
|
color_fprintf(output, color, "%6.2f%%", ratio);
|
|
fprintf(output, " of all LL-cache hits ");
|
|
}
|
|
|
|
static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
|
|
{
|
|
double total, ratio = 0.0;
|
|
char cpustr[16] = { '\0', };
|
|
const char *fmt;
|
|
|
|
if (csv_output)
|
|
fmt = "%s%.0f%s%s";
|
|
else if (big_num)
|
|
fmt = "%s%'18.0f%s%-25s";
|
|
else
|
|
fmt = "%s%18.0f%s%-25s";
|
|
|
|
if (no_aggr)
|
|
sprintf(cpustr, "CPU%*d%s",
|
|
csv_output ? 0 : -4,
|
|
evsel_list->cpus->map[cpu], csv_sep);
|
|
else
|
|
cpu = 0;
|
|
|
|
fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
|
|
|
|
if (evsel->cgrp)
|
|
fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
|
|
|
|
if (csv_output)
|
|
return;
|
|
|
|
if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
|
|
total = avg_stats(&runtime_cycles_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg / total;
|
|
|
|
fprintf(output, " # %5.2f insns per cycle ", ratio);
|
|
|
|
total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
|
|
total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
|
|
|
|
if (total && avg) {
|
|
ratio = total / avg;
|
|
fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
|
|
}
|
|
|
|
} else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
|
|
runtime_branches_stats[cpu].n != 0) {
|
|
print_branch_misses(cpu, evsel, avg);
|
|
} else if (
|
|
evsel->attr.type == PERF_TYPE_HW_CACHE &&
|
|
evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
|
|
((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
|
|
((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
|
|
runtime_l1_dcache_stats[cpu].n != 0) {
|
|
print_l1_dcache_misses(cpu, evsel, avg);
|
|
} else if (
|
|
evsel->attr.type == PERF_TYPE_HW_CACHE &&
|
|
evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
|
|
((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
|
|
((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
|
|
runtime_l1_icache_stats[cpu].n != 0) {
|
|
print_l1_icache_misses(cpu, evsel, avg);
|
|
} else if (
|
|
evsel->attr.type == PERF_TYPE_HW_CACHE &&
|
|
evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
|
|
((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
|
|
((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
|
|
runtime_dtlb_cache_stats[cpu].n != 0) {
|
|
print_dtlb_cache_misses(cpu, evsel, avg);
|
|
} else if (
|
|
evsel->attr.type == PERF_TYPE_HW_CACHE &&
|
|
evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
|
|
((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
|
|
((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
|
|
runtime_itlb_cache_stats[cpu].n != 0) {
|
|
print_itlb_cache_misses(cpu, evsel, avg);
|
|
} else if (
|
|
evsel->attr.type == PERF_TYPE_HW_CACHE &&
|
|
evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
|
|
((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
|
|
((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
|
|
runtime_ll_cache_stats[cpu].n != 0) {
|
|
print_ll_cache_misses(cpu, evsel, avg);
|
|
} else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
|
|
runtime_cacherefs_stats[cpu].n != 0) {
|
|
total = avg_stats(&runtime_cacherefs_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = avg * 100 / total;
|
|
|
|
fprintf(output, " # %8.3f %% of all cache refs ", ratio);
|
|
|
|
} else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
|
|
print_stalled_cycles_frontend(cpu, evsel, avg);
|
|
} else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
|
|
print_stalled_cycles_backend(cpu, evsel, avg);
|
|
} else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
|
|
total = avg_stats(&runtime_nsecs_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = 1.0 * avg / total;
|
|
|
|
fprintf(output, " # %8.3f GHz ", ratio);
|
|
} else if (runtime_nsecs_stats[cpu].n != 0) {
|
|
char unit = 'M';
|
|
|
|
total = avg_stats(&runtime_nsecs_stats[cpu]);
|
|
|
|
if (total)
|
|
ratio = 1000.0 * avg / total;
|
|
if (ratio < 0.001) {
|
|
ratio *= 1000;
|
|
unit = 'K';
|
|
}
|
|
|
|
fprintf(output, " # %8.3f %c/sec ", ratio, unit);
|
|
} else {
|
|
fprintf(output, " ");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print out the results of a single counter:
|
|
* aggregated counts in system-wide mode
|
|
*/
|
|
static void print_counter_aggr(struct perf_evsel *counter)
|
|
{
|
|
struct perf_stat *ps = counter->priv;
|
|
double avg = avg_stats(&ps->res_stats[0]);
|
|
int scaled = counter->counts->scaled;
|
|
|
|
if (scaled == -1) {
|
|
fprintf(output, "%*s%s%*s",
|
|
csv_output ? 0 : 18,
|
|
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
|
|
csv_sep,
|
|
csv_output ? 0 : -24,
|
|
event_name(counter));
|
|
|
|
if (counter->cgrp)
|
|
fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
|
|
|
|
fputc('\n', output);
|
|
return;
|
|
}
|
|
|
|
if (nsec_counter(counter))
|
|
nsec_printout(-1, counter, avg);
|
|
else
|
|
abs_printout(-1, counter, avg);
|
|
|
|
print_noise(counter, avg);
|
|
|
|
if (csv_output) {
|
|
fputc('\n', output);
|
|
return;
|
|
}
|
|
|
|
if (scaled) {
|
|
double avg_enabled, avg_running;
|
|
|
|
avg_enabled = avg_stats(&ps->res_stats[1]);
|
|
avg_running = avg_stats(&ps->res_stats[2]);
|
|
|
|
fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
|
|
}
|
|
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)
|
|
{
|
|
u64 ena, run, val;
|
|
int cpu;
|
|
|
|
for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
|
|
val = counter->counts->cpu[cpu].val;
|
|
ena = counter->counts->cpu[cpu].ena;
|
|
run = counter->counts->cpu[cpu].run;
|
|
if (run == 0 || ena == 0) {
|
|
fprintf(output, "CPU%*d%s%*s%s%*s",
|
|
csv_output ? 0 : -4,
|
|
evsel_list->cpus->map[cpu], csv_sep,
|
|
csv_output ? 0 : 18,
|
|
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
|
|
csv_sep,
|
|
csv_output ? 0 : -24,
|
|
event_name(counter));
|
|
|
|
if (counter->cgrp)
|
|
fprintf(output, "%s%s",
|
|
csv_sep, counter->cgrp->name);
|
|
|
|
fputc('\n', output);
|
|
continue;
|
|
}
|
|
|
|
if (nsec_counter(counter))
|
|
nsec_printout(cpu, counter, val);
|
|
else
|
|
abs_printout(cpu, counter, val);
|
|
|
|
if (!csv_output) {
|
|
print_noise(counter, 1.0);
|
|
|
|
if (run != ena)
|
|
fprintf(output, " (%.2f%%)",
|
|
100.0 * run / ena);
|
|
}
|
|
fputc('\n', output);
|
|
}
|
|
}
|
|
|
|
static void print_stat(int argc, const char **argv)
|
|
{
|
|
struct perf_evsel *counter;
|
|
int i;
|
|
|
|
fflush(stdout);
|
|
|
|
if (!csv_output) {
|
|
fprintf(output, "\n");
|
|
fprintf(output, " Performance counter stats for ");
|
|
if (!target_pid && !target_tid) {
|
|
fprintf(output, "\'%s", argv[0]);
|
|
for (i = 1; 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");
|
|
}
|
|
|
|
if (no_aggr) {
|
|
list_for_each_entry(counter, &evsel_list->entries, node)
|
|
print_counter(counter);
|
|
} else {
|
|
list_for_each_entry(counter, &evsel_list->entries, node)
|
|
print_counter_aggr(counter);
|
|
}
|
|
|
|
if (!csv_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 volatile int signr = -1;
|
|
|
|
static void skip_signal(int signo)
|
|
{
|
|
if(child_pid == -1)
|
|
done = 1;
|
|
|
|
signr = signo;
|
|
}
|
|
|
|
static void sig_atexit(void)
|
|
{
|
|
if (child_pid != -1)
|
|
kill(child_pid, SIGTERM);
|
|
|
|
if (signr == -1)
|
|
return;
|
|
|
|
signal(signr, SIG_DFL);
|
|
kill(getpid(), signr);
|
|
}
|
|
|
|
static const char * const stat_usage[] = {
|
|
"perf stat [<options>] [<command>]",
|
|
NULL
|
|
};
|
|
|
|
static int stat__set_big_num(const struct option *opt __used,
|
|
const char *s __used, int unset)
|
|
{
|
|
big_num_opt = unset ? 0 : 1;
|
|
return 0;
|
|
}
|
|
|
|
static bool append_file;
|
|
|
|
static const struct option options[] = {
|
|
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", &system_wide,
|
|
"system-wide collection from all CPUs"),
|
|
OPT_BOOLEAN('g', "group", &group,
|
|
"put the counters into a counter group"),
|
|
OPT_BOOLEAN('c', "scale", &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)"),
|
|
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", &cpu_list, "cpu",
|
|
"list of cpus to monitor in system-wide"),
|
|
OPT_BOOLEAN('A', "no-aggr", &no_aggr,
|
|
"disable CPU count aggregation"),
|
|
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_END()
|
|
};
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
/* Set attrs if no event is selected and !null_run: */
|
|
if (null_run)
|
|
return 0;
|
|
|
|
if (!evsel_list->nr_entries) {
|
|
if (perf_evlist__add_attrs_array(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_attrs_array(evsel_list, detailed_attrs) < 0)
|
|
return -1;
|
|
|
|
if (detailed_run < 2)
|
|
return 0;
|
|
|
|
/* Append very detailed run extra attributes: */
|
|
if (perf_evlist__add_attrs_array(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_attrs_array(evsel_list, very_very_detailed_attrs);
|
|
}
|
|
|
|
int cmd_stat(int argc, const char **argv, const char *prefix __used)
|
|
{
|
|
struct perf_evsel *pos;
|
|
int status = -ENOMEM;
|
|
const char *mode;
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
evsel_list = perf_evlist__new(NULL, NULL);
|
|
if (evsel_list == NULL)
|
|
return -ENOMEM;
|
|
|
|
argc = parse_options(argc, argv, options, stat_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
output = stderr;
|
|
if (output_name && strcmp(output_name, "-"))
|
|
output = NULL;
|
|
|
|
if (output_name && output_fd) {
|
|
fprintf(stderr, "cannot use both --output and --log-fd\n");
|
|
usage_with_options(stat_usage, options);
|
|
}
|
|
if (!output) {
|
|
struct timespec tm;
|
|
mode = append_file ? "a" : "w";
|
|
|
|
output = fopen(output_name, mode);
|
|
if (!output) {
|
|
perror("failed to create output file");
|
|
exit(-1);
|
|
}
|
|
clock_gettime(CLOCK_REALTIME, &tm);
|
|
fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
|
|
} else if (output_fd != 2) {
|
|
mode = append_file ? "a" : "w";
|
|
output = fdopen(output_fd, mode);
|
|
if (!output) {
|
|
perror("Failed opening logfd");
|
|
return -errno;
|
|
}
|
|
}
|
|
|
|
if (csv_sep) {
|
|
csv_output = true;
|
|
if (!strcmp(csv_sep, "\\t"))
|
|
csv_sep = "\t";
|
|
} else
|
|
csv_sep = DEFAULT_SEPARATOR;
|
|
|
|
/*
|
|
* 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");
|
|
usage_with_options(stat_usage, options);
|
|
} 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_pid && !target_tid)
|
|
usage_with_options(stat_usage, options);
|
|
if (run_count <= 0)
|
|
usage_with_options(stat_usage, options);
|
|
|
|
/* no_aggr, cgroup are for system-wide only */
|
|
if ((no_aggr || nr_cgroups) && !system_wide) {
|
|
fprintf(stderr, "both cgroup and no-aggregation "
|
|
"modes only available in system-wide mode\n");
|
|
|
|
usage_with_options(stat_usage, options);
|
|
}
|
|
|
|
if (add_default_attributes())
|
|
goto out;
|
|
|
|
if (target_pid)
|
|
target_tid = target_pid;
|
|
|
|
evsel_list->threads = thread_map__new_str(target_pid,
|
|
target_tid, UINT_MAX);
|
|
if (evsel_list->threads == NULL) {
|
|
pr_err("Problems finding threads of monitor\n");
|
|
usage_with_options(stat_usage, options);
|
|
}
|
|
|
|
if (system_wide)
|
|
evsel_list->cpus = cpu_map__new(cpu_list);
|
|
else
|
|
evsel_list->cpus = cpu_map__dummy_new();
|
|
|
|
if (evsel_list->cpus == NULL) {
|
|
perror("failed to parse CPUs map");
|
|
usage_with_options(stat_usage, options);
|
|
return -1;
|
|
}
|
|
|
|
list_for_each_entry(pos, &evsel_list->entries, node) {
|
|
if (perf_evsel__alloc_stat_priv(pos) < 0 ||
|
|
perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
|
|
goto out_free_fd;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
signal(SIGINT, skip_signal);
|
|
signal(SIGALRM, skip_signal);
|
|
signal(SIGABRT, skip_signal);
|
|
|
|
status = 0;
|
|
for (run_idx = 0; run_idx < run_count; run_idx++) {
|
|
if (run_count != 1 && verbose)
|
|
fprintf(output, "[ perf stat: executing run #%d ... ]\n",
|
|
run_idx + 1);
|
|
|
|
if (sync_run)
|
|
sync();
|
|
|
|
status = run_perf_stat(argc, argv);
|
|
}
|
|
|
|
if (status != -1)
|
|
print_stat(argc, argv);
|
|
out_free_fd:
|
|
list_for_each_entry(pos, &evsel_list->entries, node)
|
|
perf_evsel__free_stat_priv(pos);
|
|
perf_evlist__delete_maps(evsel_list);
|
|
out:
|
|
perf_evlist__delete(evsel_list);
|
|
return status;
|
|
}
|