* perf stat to collect the performance statistics of KVM process
@ 2012-05-13 15:56 Hailong Yang
2012-05-14 13:43 ` Andrew Theurer
0 siblings, 1 reply; 2+ messages in thread
From: Hailong Yang @ 2012-05-13 15:56 UTC (permalink / raw)
To: kvm
Dear all,
I am running perf stat to collect the performance statistics of the already
running KVM guest VM process. And I have a shell script to execute the perf
stat as a daemon process. But when I use the 'kill' command to stop the perf
stat, there is no output redirected to a file. What I would like to do is
that to collect performance counters of the guest VM process for a certain
period and redirect the output to a log file, but without user interaction
(such as using CTRL + C to stop the perf stat)
[root@dell06 ~]# (perf stat -p 7473 -x ,) 2> perftest &
[1] 15086
[root@dell06 ~]# kill 15086
[root@dell06 ~]#
[1]+ Terminated ( perf stat -p 7473 -x , ) 2> perftest
[root@dell06 ~]# cat perftest
[root@dell06 ~]#
Any clue?
Best Regards
Hailong
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: perf stat to collect the performance statistics of KVM process
2012-05-13 15:56 perf stat to collect the performance statistics of KVM process Hailong Yang
@ 2012-05-14 13:43 ` Andrew Theurer
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Theurer @ 2012-05-14 13:43 UTC (permalink / raw)
To: Hailong Yang; +Cc: kvm
On 05/13/2012 10:56 AM, Hailong Yang wrote:
> Dear all,
>
> I am running perf stat to collect the performance statistics of the already
> running KVM guest VM process. And I have a shell script to execute the perf
> stat as a daemon process. But when I use the 'kill' command to stop the perf
> stat, there is no output redirected to a file. What I would like to do is
> that to collect performance counters of the guest VM process for a certain
> period and redirect the output to a log file, but without user interaction
> (such as using CTRL + C to stop the perf stat)
>
> [root@dell06 ~]# (perf stat -p 7473 -x ,) 2> perftest&
> [1] 15086
> [root@dell06 ~]# kill 15086
> [root@dell06 ~]#
> [1]+ Terminated ( perf stat -p 7473 -x , ) 2> perftest
> [root@dell06 ~]# cat perftest
> [root@dell06 ~]#
>
> Any clue?
Can you please try "kill -s INT <pid>"
>
> Best Regards
>
> Hailong
>
-Andrew Theurer
^ permalink raw reply [flat|nested] 2+ messages in thread
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