[tip:perfcounters/core] perf stat: Enable raw data to be printed

tip-bot for Ingo Molnar
2009-06-13T14:52:12Z

Commit-ID: ef281a196d66b8bc2d067a3704712e5b93691fbc
Gitweb: http://git.kernel.org/tip/ef281a196d66b8bc2d067a3704712e5b93691fbc
Author: Ingo Molnar <mingo@elte.hu>
AuthorDate: Sat, 13 Jun 2009 15:40:35 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Sat, 13 Jun 2009 15:40:35 +0200

perf stat: Enable raw data to be printed

If -vv (very verbose) is specified, print out raw data
in the following format:

$ perf stat -vv -r 3 ./loop_1b_instructions

[ perf stat: executing run #1 ... ]
[ perf stat: executing run #2 ... ]
[ perf stat: executing run #3 ... ]

debug: runtime[0]: 235871872
debug: walltime[0]: 236646752
debug: runtime_cycles[0]: 755150182
debug: counter/0[0]: 235871872
debug: counter/1[0]: 235871872
debug: counter/2[0]: 235871872
debug: scaled[0]: 0
debug: counter/0[1]: 2
debug: counter/1[1]: 235870662
debug: counter/2[1]: 235870662
debug: scaled[1]: 0
debug: counter/0[2]: 1
debug: counter/1[2]: 235870437
debug: counter/2[2]: 235870437
debug: scaled[2]: 0
debug: counter/0[3]: 140
debug: counter/1[3]: 235870298
debug: counter/2[3]: 235870298
debug: scaled[3]: 0
debug: counter/0[4]: 755150182
debug: counter/1[4]: 235870145
debug: counter/2[4]: 235870145
debug: scaled[4]: 0
debug: counter/0[5]: 1001411258
debug: counter/1[5]: 235868838
debug: counter/2[5]: 235868838
debug: scaled[5]: 0
debug: counter/0[6]: 27897
debug: counter/1[6]: 235868560
debug: counter/2[6]: 235868560
debug: scaled[6]: 0
debug: counter/0[7]: 2910
debug: counter/1[7]: 235868151
debug: counter/2[7]: 235868151
debug: scaled[7]: 0
debug: runtime[0]: 235980257
debug: walltime[0]: 236770942
debug: runtime_cycles[0]: 755114546
debug: counter/0[0]: 235980257
debug: counter/1[0]: 235980257
debug: counter/2[0]: 235980257
debug: scaled[0]: 0
debug: counter/0[1]: 3
debug: counter/1[1]: 235980049
debug: counter/2[1]: 235980049
debug: scaled[1]: 0
debug: counter/0[2]: 1
debug: counter/1[2]: 235979907
debug: counter/2[2]: 235979907
debug: scaled[2]: 0
debug: counter/0[3]: 135
debug: counter/1[3]: 235979780
debug: counter/2[3]: 235979780
debug: scaled[3]: 0
debug: counter/0[4]: 755114546
debug: counter/1[4]: 235979652
debug: counter/2[4]: 235979652
debug: scaled[4]: 0
debug: counter/0[5]: 1001439771
debug: counter/1[5]: 235979304
debug: counter/2[5]: 235979304
debug: scaled[5]: 0
debug: counter/0[6]: 23723
debug: counter/1[6]: 235979050
debug: counter/2[6]: 235979050
debug: scaled[6]: 0
debug: counter/0[7]: 2213
debug: counter/1[7]: 235978820
debug: counter/2[7]: 235978820
debug: scaled[7]: 0
debug: runtime[0]: 235888002
debug: walltime[0]: 236700533
debug: runtime_cycles[0]: 754881504
debug: counter/0[0]: 235888002
debug: counter/1[0]: 235888002
debug: counter/2[0]: 235888002
debug: scaled[0]: 0
debug: counter/0[1]: 2
debug: counter/1[1]: 235887793
debug: counter/2[1]: 235887793
debug: scaled[1]: 0
debug: counter/0[2]: 1
debug: counter/1[2]: 235887645
debug: counter/2[2]: 235887645
debug: scaled[2]: 0
debug: counter/0[3]: 135
debug: counter/1[3]: 235887499
debug: counter/2[3]: 235887499
debug: scaled[3]: 0
debug: counter/0[4]: 754881504
debug: counter/1[4]: 235887368
debug: counter/2[4]: 235887368
debug: scaled[4]: 0
debug: counter/0[5]: 1001401731
debug: counter/1[5]: 235887024
debug: counter/2[5]: 235887024
debug: scaled[5]: 0
debug: counter/0[6]: 24212
debug: counter/1[6]: 235886786
debug: counter/2[6]: 235886786
debug: scaled[6]: 0
debug: counter/0[7]: 1824
debug: counter/1[7]: 235886560
debug: counter/2[7]: 235886560
debug: scaled[7]: 0

Performance counter stats for '/home/mingo/loop_1b_instructions' (3 runs):

235.913377 task-clock-msecs # 0.997 CPUs ( +- 0.011% )
2 context-switches # 0.000 M/sec ( +- 0.000% )
1 CPU-migrations # 0.000 M/sec ( +- 0.000% )
136 page-faults # 0.001 M/sec ( +- 0.730% )
755048744 cycles # 3200.534 M/sec ( +- 0.009% )
1001417586 instructions # 1.326 IPC ( +- 0.001% )
25277 cache-references # 0.107 M/sec ( +- 3.988% )
2315 cache-misses # 0.010 M/sec ( +- 9.845% )

0.236706075 seconds time elapsed.

This allows the summary stats to be validated.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
tools/perf/Makefile | 2 +-
tools/perf/builtin-stat.c | 46 ++++++++++++++++++++++++++++----------------
2 files changed, 30 insertions(+), 18 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 0cbd5d6..e8346f9 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -160,7 +160,7 @@ uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
# CFLAGS and LDFLAGS are for the users to override from the command line.

CFLAGS = -ggdb3 -Wall -Werror -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -std=gnu99 -Wdeclaration-after-statement -O6
-LDFLAGS = -lpthread -lrt -lelf
+LDFLAGS = -lpthread -lrt -lelf -lm
ALL_CFLAGS = $(CFLAGS)
ALL_LDFLAGS = $(LDFLAGS)
STRIP ?= strip
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 9eb42b1..e5b3c0f 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -324,9 +324,9 @@ static void print_counter(int counter)
}

/*
- * Normalize noise values down to stddev:
+ * normalize_noise noise values down to stddev:
*/
-static void normalize(__u64 *val)
+static void normalize_noise(__u64 *val)
{
double res;

@@ -335,6 +335,13 @@ static void normalize(__u64 *val)
*val = (__u64)res;
}

+static void update_avg(const char *name, int idx, __u64 *avg, __u64 *val)
+{
+ *avg += *val;
+
+ if (verbose > 1)
+ fprintf(stderr, "debug: %20s[%d]: %Ld\n", name, idx, *val);
+}
/*
* Calculate the averages and noises:
*/
@@ -342,16 +349,23 @@ static void calc_avg(void)
{
int i, j;

+ if (verbose > 1)
+ fprintf(stderr, "\n");
+
for (i = 0; i < run_count; i++) {
- runtime_nsecs_avg += runtime_nsecs[i];
- walltime_nsecs_avg += walltime_nsecs[i];
- runtime_cycles_avg += runtime_cycles[i];
+ update_avg("runtime", 0, &runtime_nsecs_avg, runtime_nsecs + i);
+ update_avg("walltime", 0, &walltime_nsecs_avg, walltime_nsecs + i);
+ update_avg("runtime_cycles", 0, &runtime_cycles_avg, runtime_cycles + i);

for (j = 0; j < nr_counters; j++) {
- event_res_avg[j][0] += event_res[i][j][0];
- event_res_avg[j][1] += event_res[i][j][1];
- event_res_avg[j][2] += event_res[i][j][2];
- event_scaled_avg[j] += event_scaled[i][j];
+ update_avg("counter/0", j,
+ event_res_avg[j]+0, event_res[i][j]+0);
+ update_avg("counter/1", j,
+ event_res_avg[j]+1, event_res[i][j]+1);
+ update_avg("counter/2", j,
+ event_res_avg[j]+2, event_res[i][j]+2);
+ update_avg("scaled", j,
+ event_scaled_avg + j, event_scaled[i]+j);
}
}
runtime_nsecs_avg /= run_count;
@@ -382,14 +396,14 @@ static void calc_avg(void)
}
}

- normalize(&runtime_nsecs_noise);
- normalize(&walltime_nsecs_noise);
- normalize(&runtime_cycles_noise);
+ normalize_noise(&runtime_nsecs_noise);
+ normalize_noise(&walltime_nsecs_noise);
+ normalize_noise(&runtime_cycles_noise);

for (j = 0; j < nr_counters; j++) {
- normalize(&event_res_noise[j][0]);
- normalize(&event_res_noise[j][1]);
- normalize(&event_res_noise[j][2]);
+ normalize_noise(&event_res_noise[j][0]);
+ normalize_noise(&event_res_noise[j][1]);
+ normalize_noise(&event_res_noise[j][2]);
}
}

@@ -399,8 +413,6 @@ static void print_stat(int argc, const char **argv)

calc_avg();

- run_idx = 0;
-
fflush(stdout);

fprintf(stderr, "\n");