perf stat: Add -d -d and -d -d -d options to show more CPU events
Print even more detailed statistics if requested via perf stat -d:
-d: detailed events, L1 and LLC data cache
-d -d: more detailed events, dTLB and iTLB events
-d -d -d: very detailed events, adding prefetch events
Full output looks like this now:
Performance counter stats for '/home/mingo/hackbench 10' (5 runs):
1703.674707 task-clock # 8.709 CPUs utilized ( +- 4.19% )
49,068 context-switches # 0.029 M/sec ( +- 16.66% )
8,303 CPU-migrations # 0.005 M/sec ( +- 24.90% )
17,397 page-faults # 0.010 M/sec ( +- 0.46% )
2,345,389,239 cycles # 1.377 GHz ( +- 4.61% ) [55.90%]
1,884,503,527 stalled-cycles-frontend # 80.35% frontend cycles idle ( +- 5.67% ) [50.39%]
743,919,737 stalled-cycles-backend # 31.72% backend cycles idle ( +- 8.75% ) [49.91%]
1,314,416,379 instructions # 0.56 insns per cycle
# 1.43 stalled cycles per insn ( +- 2.53% ) [60.87%]
272,592,567 branches # 160.003 M/sec ( +- 1.74% ) [56.56%]
3,794,846 branch-misses # 1.39% of all branches ( +- 6.59% ) [58.50%]
449,982,778 L1-dcache-loads # 264.125 M/sec ( +- 2.47% ) [49.88%]
22,404,961 L1-dcache-load-misses # 4.98% of all L1-dcache hits ( +- 6.08% ) [55.05%]
6,204,750 LLC-loads # 3.642 M/sec ( +- 8.91% ) [43.75%]
1,837,411 LLC-load-misses # 1.078 M/sec ( +- 7.27% ) [12.07%]
411,440,421 L1-icache-loads # 241.502 M/sec ( +- 5.60% ) [36.52%]
27,556,832 L1-icache-load-misses # 16.175 M/sec ( +- 7.46% ) [46.72%]
464,067,627 dTLB-loads # 272.392 M/sec ( +- 4.46% ) [54.17%]
10,765,648 dTLB-load-misses # 6.319 M/sec ( +- 3.18% ) [48.68%]
1,273,080,386 iTLB-loads # 747.256 M/sec ( +- 3.38% ) [47.53%]
117,481 iTLB-load-misses # 0.069 M/sec ( +- 14.99% ) [47.01%]
4,590,653 L1-dcache-prefetches # 2.695 M/sec ( +- 4.49% ) [46.19%]
1,712,660 L1-dcache-prefetch-misses # 1.005 M/sec ( +- 3.75% ) [44.82%]
0.195622057 seconds time elapsed ( +- 6.84% )
Also clean up the attribute construction code to be appending, and factor
it out into add_default_attributes().
Tweak the coverage percentage printout a bit, so that it's easier to view it
alongside the +- sttddev colum.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-to3kgu04449s64062val8b62@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 602c3c9..a89fc08 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -6,24 +6,28 @@
*
* Sample output:
- $ perf stat ~/hackbench 10
- Time: 0.104
+ $ perf stat ./hackbench 10
- Performance counter stats for '/home/mingo/hackbench':
+ Time: 0.118
- 1255.538611 task clock ticks # 10.143 CPU utilization factor
- 54011 context switches # 0.043 M/sec
- 385 CPU migrations # 0.000 M/sec
- 17755 pagefaults # 0.014 M/sec
- 3808323185 CPU cycles # 3033.219 M/sec
- 1575111190 instructions # 1254.530 M/sec
- 17367895 cache references # 13.833 M/sec
- 7674421 cache misses # 6.112 M/sec
+ Performance counter stats for './hackbench 10':
- Wall-clock time elapsed: 123.786620 msecs
+ 1708.761321 task-clock # 11.037 CPUs utilized
+ 41,190 context-switches # 0.024 M/sec
+ 6,735 CPU-migrations # 0.004 M/sec
+ 17,318 page-faults # 0.010 M/sec
+ 5,205,202,243 cycles # 3.046 GHz
+ 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
+ 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
+ 2,603,501,247 instructions # 0.50 insns per cycle
+ # 1.48 stalled cycles per insn
+ 484,357,498 branches # 283.455 M/sec
+ 6,388,934 branch-misses # 1.32% of all branches
+
+ 0.154822978 seconds time elapsed
*
- * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
*
* Improvements and fixes by:
*
@@ -75,22 +79,10 @@
};
/*
- * Detailed stats:
+ * Detailed stats (-d), covering the L1 and last level data caches:
*/
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_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 },
-
{ .type = PERF_TYPE_HW_CACHE,
.config =
PERF_COUNT_HW_CACHE_L1D << 0 |
@@ -116,6 +108,69 @@
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
};
+/*
+ * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
+ */
+static 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:
+ */
+static struct perf_event_attr very_very_detailed_attrs[] = {
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1D << 0 |
+ (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
+
+ { .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1D << 0 |
+ (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
+};
+
+
+
struct perf_evlist *evsel_list;
static bool system_wide = false;
@@ -129,7 +184,7 @@
static pid_t target_tid = -1;
static pid_t child_pid = -1;
static bool null_run = false;
-static bool detailed_run = false;
+static int detailed_run = 0;
static bool sync_run = false;
static bool big_num = true;
static int big_num_opt = -1;
@@ -464,7 +519,7 @@
{
double msecs = avg / 1e6;
char cpustr[16] = { '\0', };
- const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
+ const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
if (no_aggr)
sprintf(cpustr, "CPU%*d%s",
@@ -584,9 +639,9 @@
if (csv_output)
fmt = "%s%.0f%s%s";
else if (big_num)
- fmt = "%s%'18.0f%s%-24s";
+ fmt = "%s%'18.0f%s%-25s";
else
- fmt = "%s%18.0f%s%-24s";
+ fmt = "%s%18.0f%s%-25s";
if (no_aggr)
sprintf(cpustr, "CPU%*d%s",
@@ -616,7 +671,7 @@
if (total && avg) {
ratio = total / avg;
- fprintf(stderr, "\n # %5.2f stalled cycles per insn", ratio);
+ fprintf(stderr, "\n # %5.2f stalled cycles per insn", ratio);
}
} else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
@@ -704,7 +759,7 @@
avg_enabled = avg_stats(&ps->res_stats[1]);
avg_running = avg_stats(&ps->res_stats[2]);
- fprintf(stderr, " (%.2f%%)", 100 * avg_running / avg_enabled);
+ fprintf(stderr, " [%5.2f%%]", 100 * avg_running / avg_enabled);
}
fprintf(stderr, "\n");
}
@@ -854,7 +909,7 @@
"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,
+ 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"),
@@ -873,6 +928,70 @@
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)
+{
+ struct perf_evsel *pos;
+ size_t attr_nr = 0;
+ size_t c;
+
+ /* Set attrs if no event is selected and !null_run: */
+ if (null_run)
+ return 0;
+
+ if (!evsel_list->nr_entries) {
+ for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
+ pos = perf_evsel__new(default_attrs + c, c + attr_nr);
+ if (pos == NULL)
+ return -1;
+ perf_evlist__add(evsel_list, pos);
+ }
+ attr_nr += c;
+ }
+
+ /* Detailed events get appended to the event list: */
+
+ if (detailed_run < 1)
+ return 0;
+
+ /* Append detailed run extra attributes: */
+ for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) {
+ pos = perf_evsel__new(detailed_attrs + c, c + attr_nr);
+ if (pos == NULL)
+ return -1;
+ perf_evlist__add(evsel_list, pos);
+ }
+ attr_nr += c;
+
+ if (detailed_run < 2)
+ return 0;
+
+ /* Append very detailed run extra attributes: */
+ for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
+ pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
+ if (pos == NULL)
+ return -1;
+ perf_evlist__add(evsel_list, pos);
+ }
+
+ if (detailed_run < 3)
+ return 0;
+
+ /* Append very, very detailed run extra attributes: */
+ for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
+ pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
+ if (pos == NULL)
+ return -1;
+ perf_evlist__add(evsel_list, pos);
+ }
+
+
+ return 0;
+}
+
int cmd_stat(int argc, const char **argv, const char *prefix __used)
{
struct perf_evsel *pos;
@@ -918,28 +1037,8 @@
usage_with_options(stat_usage, options);
}
- /* Set attrs and nr_counters if no event is selected and !null_run */
- 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) {
- pos = perf_evsel__new(&default_attrs[c], c);
- if (pos == NULL)
- goto out;
- perf_evlist__add(evsel_list, pos);
- }
- }
+ if (add_default_attributes())
+ goto out;
if (target_pid != -1)
target_tid = target_pid;