Re: [PATCH 2/3] perf trace: Add summary option to dump syscallstatistics
From: Jiri Olsa
Date: Wed Oct 09 2013 - 09:17:12 EST
On Tue, Oct 08, 2013 at 09:26:53PM -0600, David Ahern wrote:
> 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
>
Should the syscalls columns be aligned with the data?
jirka
---
[ task - pid ] [ events ] [ ratio ] [ runtime ]
syscall count min max avg stddev
msec msec msec %
_____________________________________________________________________________
ls - 10994 : 530 [ 97.4% ] 0.000 ms
read : 18 0.000 0.016 0.003 25.51
open : 24 0.002 0.026 0.005 19.46
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