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| author |   Stephane Eranian <eranian@google.com> | 2011-08-15 22:22:33 +0200 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-08-18 07:46:13 -0300 |
| commit | 4aa9015f8bfd2c8d7cc33a360275b71a9d708b37 (patch) | |
| tree | 868d22562ba20ed87698e69cf33d29cce19764fb /tools/perf/util/color.c | |
| parent | perf annotate: Add --symfs option (diff) | |
| download | linux-dev-4aa9015f8bfd2c8d7cc33a360275b71a9d708b37.tar.xz linux-dev-4aa9015f8bfd2c8d7cc33a360275b71a9d708b37.zip | |
perf stat: Add -o and --append options
This patch adds an option (-o) to save the output of perf stat into a
file. You could do this with perf record but not with perf stat.
Instead, you had to fiddle with stderr to save the counts into a
separate file.
The patch also adds the --append option so that results can be
concatenated into a single file across runs. Each run of the tool is
clearly separated by a comment line starting with a hash mark. The -A
option of perf record is already used by perf stat, so we only add a
long option.
$ perf stat -o res.txt date
$ cat res.txt
Performance counter stats for 'date':
0.791306 task-clock # 0.668 CPUs utilized
2 context-switches # 0.003 M/sec
0 CPU-migrations # 0.000 M/sec
197 page-faults # 0.249 M/sec
1878143 cycles # 2.373 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
1083367 instructions # 0.58 insns per cycle
193027 branches # 243.935 M/sec
9014 branch-misses # 4.67% of all branches
0.001184746 seconds time elapsed
The option can be combined with -x to make the output file much easier
to parse.
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20110815202233.GA18535@quad
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/color.c')
| -rw-r--r-- | tools/perf/util/color.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/color.c b/tools/perf/util/color.c index e191eb9a667f..521c38a79190 100644 --- a/tools/perf/util/color.c +++ b/tools/perf/util/color.c @@ -200,7 +200,7 @@ static int __color_vfprintf(FILE *fp, const char *color, const char *fmt, * Auto-detect: */ if (perf_use_color_default < 0) { - if (isatty(1) || pager_in_use()) + if (isatty(fileno(fp)) || pager_in_use()) perf_use_color_default = 1; else perf_use_color_default = 0; |