Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit c6264def authored by Ingo Molnar's avatar Ingo Molnar
Browse files

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: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: default avatarArnaldo 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: default avatarIngo Molnar <mingo@elte.hu>
parent 8bb6c79f

tools/perf/builtin-stat.c

+60 −8
Original line number Diff line number Diff line
@@ -73,6 +73,47 @@ static struct perf_event_attr default_attrs[] = { 


};



/*

 * Detailed stats:

 */

static struct perf_event_attr detailed_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		},

  { .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		},



  { .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)				},

};



struct perf_evlist		*evsel_list;



static bool			system_wide			=  false;
@@ -86,6 +127,7 @@ static pid_t target_pid = -1; 
static pid_t			target_tid			= -1;

static pid_t			child_pid			= -1;

static bool			null_run			=  false;

static bool			detailed_run			=  false;

static bool			big_num				=  true;

static int			big_num_opt			=  -1;

static const char		*cpu_list;
@@ -550,7 +592,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) 
		evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |

					((PERF_COUNT_HW_CACHE_OP_READ) << 8) |

					((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&

			runtime_branches_stats[cpu].n != 0) {

			runtime_l1_dcache_stats[cpu].n != 0) {

		print_l1_dcache_misses(cpu, evsel, avg);

	} else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&

			runtime_cacherefs_stats[cpu].n != 0) {
@@ -625,8 +667,7 @@ static void print_counter_aggr(struct perf_evsel *counter) 
		avg_enabled = avg_stats(&ps->res_stats[1]);

		avg_running = avg_stats(&ps->res_stats[2]);



		fprintf(stderr, "  (scaled from %.2f%%)",

				100 * avg_running / avg_enabled);

		fprintf(stderr, "  (%.2f%%)", 100 * avg_running / avg_enabled);

	}

	fprintf(stderr, "\n");

}
@@ -668,10 +709,8 @@ static void print_counter(struct perf_evsel *counter) 
		if (!csv_output) {

			print_noise(counter, 1.0);



			if (run != ena) {

				fprintf(stderr, "  (scaled from %.2f%%)",

					100.0 * run / ena);

			}

			if (run != ena)

				fprintf(stderr, "  (%.2f%%)", 100.0 * run / ena);

		}

		fputc('\n', stderr);

	}
@@ -778,6 +817,8 @@ static const struct option options[] = { 
		    "repeat command and print average + stddev (max: 100)"),

	OPT_BOOLEAN('n', "null", &null_run,

		    "null run - dont start any counters"),

	OPT_BOOLEAN('d', "detailed", &detailed_run,

		    "detailed run - start a lot of events"),

	OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 

			   "print large numbers with thousands\' separators",

			   stat__set_big_num),
@@ -839,7 +880,18 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used) 
	}



	/* Set attrs and nr_counters if no event is selected and !null_run */

	if (!null_run && !evsel_list->nr_entries) {

	if (detailed_run) {

		size_t c;



		for (c = 0; c < ARRAY_SIZE(detailed_attrs); ++c) {

			pos = perf_evsel__new(&detailed_attrs[c], c);

			if (pos == NULL)

				goto out;

			perf_evlist__add(evsel_list, pos);

		}

	}

	/* Set attrs and nr_counters if no event is selected and !null_run */

	if (!detailed_run && !null_run && !evsel_list->nr_entries) {

		size_t c;



		for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) {