How to monitor sampling over time with Perf

How to monitor sampling over time with Perf

[Donitta]

Hi,
I would like to monitor perf results over time. For example, I would like to 
have all the occurrences of an event and their timestamp of occurrence.
How can I have those infos? I read somewhere in the documentation that perf 
script command provides timestamps for each occurrence, but when I tried this 
command I didn't understand it's output, and there is no documentation. 
Could someone plead provide me examples on how to use perf utilities to answer 
my needs?

Many thnaks

Re: How to monitor sampling over time with Perf

[Guru Prasad]

I don't think this functionality is available in perf..I could be wrong..
I think you would have to add a small piece of code in perf stat to
achieve this..
Follow the execution from cmd_stat until run_perf_stat(I think..)

I will try to answer your question better once I go back to my lab..I
don't have access to the kernel sources currently..



On Sun, Apr 28, 2013 at 8:01 AM, Donitta <sabra_gr@yahoo.fr> wrote:
> Hi,
> I would like to monitor perf results over time. For example, I would like to
> have all the occurrences of an event and their timestamp of occurrence.
> How can I have those infos? I read somewhere in the documentation that perf
> script command provides timestamps for each occurrence, but when I tried this
> command I didn't understand it's output, and there is no documentation.
> Could someone plead provide me examples on how to use perf utilities to answer
> my needs?
>
> Many thnaks
>
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