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>
This commit is contained in:
Ingo Molnar
parent
b313207286
commit
2cba3ffb9a
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@ -6,24 +6,28 @@
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*
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* Sample output:
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$ perf stat ~/hackbench 10
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Time: 0.104
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$ perf stat ./hackbench 10
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Performance counter stats for '/home/mingo/hackbench':
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Time: 0.118
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1255.538611 task clock ticks # 10.143 CPU utilization factor
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54011 context switches # 0.043 M/sec
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385 CPU migrations # 0.000 M/sec
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17755 pagefaults # 0.014 M/sec
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3808323185 CPU cycles # 3033.219 M/sec
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1575111190 instructions # 1254.530 M/sec
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17367895 cache references # 13.833 M/sec
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7674421 cache misses # 6.112 M/sec
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Performance counter stats for './hackbench 10':
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Wall-clock time elapsed: 123.786620 msecs
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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, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
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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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@ -75,22 +79,10 @@ 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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* 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_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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{ .type = PERF_TYPE_HW_CACHE,
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.config =
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PERF_COUNT_HW_CACHE_L1D << 0 |
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@ -116,6 +108,69 @@ static struct perf_event_attr detailed_attrs[] = {
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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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@ -129,7 +184,7 @@ 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 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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@ -464,7 +519,7 @@ static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
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{
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double msecs = avg / 1e6;
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char cpustr[16] = { '\0', };
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const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
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const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
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if (no_aggr)
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sprintf(cpustr, "CPU%*d%s",
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@ -584,9 +639,9 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
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if (csv_output)
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fmt = "%s%.0f%s%s";
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else if (big_num)
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fmt = "%s%'18.0f%s%-24s";
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fmt = "%s%'18.0f%s%-25s";
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else
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fmt = "%s%18.0f%s%-24s";
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fmt = "%s%18.0f%s%-25s";
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if (no_aggr)
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sprintf(cpustr, "CPU%*d%s",
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@ -616,7 +671,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
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if (total && avg) {
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ratio = total / avg;
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fprintf(stderr, "\n # %5.2f stalled cycles per insn", ratio);
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fprintf(stderr, "\n # %5.2f stalled cycles per insn", ratio);
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}
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} else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
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@ -704,7 +759,7 @@ 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, " (%.2f%%)", 100 * avg_running / avg_enabled);
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fprintf(stderr, " [%5.2f%%]", 100 * avg_running / avg_enabled);
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}
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fprintf(stderr, "\n");
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}
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@ -854,7 +909,7 @@ 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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OPT_INCR('d', "detailed", &detailed_run,
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"detailed run - start a lot of events"),
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OPT_BOOLEAN('S', "sync", &sync_run,
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"call sync() before starting a run"),
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@ -873,6 +928,70 @@ static const struct option options[] = {
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OPT_END()
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};
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/*
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* Add default attributes, if there were no attributes specified or
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* if -d/--detailed, -d -d or -d -d -d is used:
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*/
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static int add_default_attributes(void)
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{
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struct perf_evsel *pos;
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size_t attr_nr = 0;
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size_t c;
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/* Set attrs if no event is selected and !null_run: */
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if (null_run)
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return 0;
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if (!evsel_list->nr_entries) {
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for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
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pos = perf_evsel__new(default_attrs + c, c + attr_nr);
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if (pos == NULL)
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return -1;
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perf_evlist__add(evsel_list, pos);
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}
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attr_nr += c;
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}
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/* Detailed events get appended to the event list: */
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if (detailed_run < 1)
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return 0;
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/* Append detailed run extra attributes: */
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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 + attr_nr);
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if (pos == NULL)
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return -1;
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perf_evlist__add(evsel_list, pos);
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}
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attr_nr += c;
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if (detailed_run < 2)
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return 0;
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/* Append very detailed run extra attributes: */
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for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
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pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
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if (pos == NULL)
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return -1;
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perf_evlist__add(evsel_list, pos);
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}
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if (detailed_run < 3)
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return 0;
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/* Append very, very detailed run extra attributes: */
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for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
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pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
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if (pos == NULL)
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return -1;
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perf_evlist__add(evsel_list, pos);
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}
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return 0;
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}
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int cmd_stat(int argc, const char **argv, const char *prefix __used)
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{
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struct perf_evsel *pos;
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@ -918,28 +1037,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
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usage_with_options(stat_usage, options);
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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) {
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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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pos = perf_evsel__new(&default_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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if (add_default_attributes())
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goto out;
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if (target_pid != -1)
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target_tid = target_pid;
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