mirror of https://gitee.com/openkylin/linux.git
perf stat: Add -d/--detailed flag to run with a lot of events
Add the new -d/--detailed flag, which generates a pretty detailed event list:
Performance counter stats for './hackbench 10' (10 runs):
1514.287888 task-clock # 10.897 CPUs utilized ( +- 3.05% )
39,698 context-switches # 0.026 M/sec ( +- 12.19% )
8,147 CPU-migrations # 0.005 M/sec ( +- 16.55% )
17,918 page-faults # 0.012 M/sec ( +- 0.37% )
2,944,504,050 cycles # 1.944 GHz ( +- 3.89% ) (32.60%)
1,043,971,283 stalled-cycles # 35.45% of all cycles are idle ( +- 5.22% ) (44.48%)
1,655,906,768 instructions # 0.56 insns per cycle
# 0.63 stalled cycles per insn ( +- 1.95% ) (55.09%)
338,832,373 branches # 223.757 M/sec ( +- 1.96% ) (64.47%)
3,892,416 branch-misses # 1.15% of all branches ( +- 5.49% ) (73.12%)
606,410,482 L1-dcache-loads # 400.459 M/sec ( +- 1.29% ) (71.21%)
31,204,395 L1-dcache-load-misses # 5.15% of all L1-dcache hits ( +- 3.04% ) (60.43%)
3,922,751 LLC-loads # 2.590 M/sec ( +- 6.80% ) (46.87%)
5,037,288 LLC-load-misses # 3.327 M/sec ( +- 3.56% ) (13.00%)
0.138966828 seconds time elapsed ( +- 4.11% )
This can be used "at a glance" for narrower analysis.
-d can also be used in addition to other -e events, to further expand an event list.
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-cxs98quixs3qyvdqx3goojc4@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
parent
8bb6c79f24
commit
c6264deff7
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@ -73,6 +73,47 @@ static struct perf_event_attr default_attrs[] = {
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};
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/*
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* Detailed stats:
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*/
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static struct perf_event_attr detailed_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 },
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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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{ .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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struct perf_evlist *evsel_list;
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static bool system_wide = false;
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@ -86,6 +127,7 @@ static pid_t target_pid = -1;
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static pid_t target_tid = -1;
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static pid_t child_pid = -1;
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static bool null_run = false;
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static bool detailed_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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@ -550,7 +592,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
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evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
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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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runtime_branches_stats[cpu].n != 0) {
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runtime_l1_dcache_stats[cpu].n != 0) {
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print_l1_dcache_misses(cpu, evsel, avg);
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} else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
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runtime_cacherefs_stats[cpu].n != 0) {
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@ -625,8 +667,7 @@ static void print_counter_aggr(struct perf_evsel *counter)
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avg_enabled = avg_stats(&ps->res_stats[1]);
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avg_running = avg_stats(&ps->res_stats[2]);
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fprintf(stderr, " (scaled from %.2f%%)",
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100 * avg_running / avg_enabled);
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fprintf(stderr, " (%.2f%%)", 100 * avg_running / avg_enabled);
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}
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fprintf(stderr, "\n");
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}
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@ -668,10 +709,8 @@ static void print_counter(struct perf_evsel *counter)
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if (!csv_output) {
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print_noise(counter, 1.0);
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if (run != ena) {
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fprintf(stderr, " (scaled from %.2f%%)",
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100.0 * run / ena);
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}
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if (run != ena)
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fprintf(stderr, " (%.2f%%)", 100.0 * run / ena);
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}
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fputc('\n', stderr);
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}
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@ -778,6 +817,8 @@ static const struct option options[] = {
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"repeat command and print average + stddev (max: 100)"),
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OPT_BOOLEAN('n', "null", &null_run,
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"null run - dont start any counters"),
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OPT_BOOLEAN('d', "detailed", &detailed_run,
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"detailed run - start a lot of events"),
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OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
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"print large numbers with thousands\' separators",
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stat__set_big_num),
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@ -839,7 +880,18 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
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}
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/* Set attrs and nr_counters if no event is selected and !null_run */
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if (!null_run && !evsel_list->nr_entries) {
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if (detailed_run) {
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size_t c;
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for (c = 0; c < ARRAY_SIZE(detailed_attrs); ++c) {
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pos = perf_evsel__new(&detailed_attrs[c], c);
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if (pos == NULL)
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goto out;
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perf_evlist__add(evsel_list, pos);
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}
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}
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/* Set attrs and nr_counters if no event is selected and !null_run */
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if (!detailed_run && !null_run && !evsel_list->nr_entries) {
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size_t c;
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for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) {
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