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| author | David Ahern <dsahern@gmail.com> | 2013-10-08 21:26:53 -0600 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-10-14 10:28:50 -0300 |
| commit | bf2575c121ca11247ef07fd02b43f7430834f7b1 (patch) | |
| tree | 73f45129f7579714c2d4abfc69f322b0deec4e34 /tools/perf/Documentation/perf-trace.txt | |
| parent | 813335b8b27d9ceeb67a073f501ada8b8dde37a7 (diff) | |
| download | op-kernel-dev-bf2575c121ca11247ef07fd02b43f7430834f7b1.zip op-kernel-dev-bf2575c121ca11247ef07fd02b43f7430834f7b1.tar.gz | |
perf trace: Add summary option to dump syscall statistics
When enabled dumps a summary of all syscalls by task with the usual
statistics -- min, max, average and relative stddev. For example,
make - 26341 : 3344 [ 17.4% ] 0.000 ms
read : 52 0.000 4.802 0.644 30.08
write : 20 0.004 0.036 0.010 21.72
open : 24 0.003 0.046 0.014 23.68
close : 64 0.002 0.055 0.008 22.53
stat : 2714 0.002 0.222 0.004 4.47
fstat : 18 0.001 0.041 0.006 46.26
mmap : 30 0.003 0.009 0.006 5.71
mprotect : 8 0.006 0.039 0.016 32.16
munmap : 12 0.007 0.077 0.020 38.25
brk : 48 0.002 0.014 0.004 10.18
rt_sigaction : 18 0.002 0.002 0.002 2.11
rt_sigprocmask : 60 0.002 0.128 0.010 32.88
access : 2 0.006 0.006 0.006 0.00
pipe : 12 0.004 0.048 0.013 35.98
vfork : 34 0.448 0.980 0.692 3.04
execve : 20 0.000 0.387 0.046 56.66
wait4 : 34 0.017 9923.287 593.221 68.45
fcntl : 8 0.001 0.041 0.013 48.79
getdents : 48 0.002 0.079 0.013 19.62
getcwd : 2 0.005 0.005 0.005 0.00
chdir : 2 0.070 0.070 0.070 0.00
getrlimit : 2 0.045 0.045 0.045 0.00
arch_prctl : 2 0.002 0.002 0.002 0.00
setrlimit : 2 0.002 0.002 0.002 0.00
openat : 94 0.003 0.005 0.003 2.11
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1381289214-24885-3-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-trace.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-trace.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index 1a22486..54139c6 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -93,6 +93,10 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. --comm:: Show process COMM right beside its ID, on by default, disable with --no-comm. +--summary:: + Show a summary of syscalls by thread with min, max, and average times (in + msec) and relative stddev. + SEE ALSO -------- linkperf:perf-record[1], linkperf:perf-script[1] |
