linux-kernel - Re: Specifying some processes to record using perf

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Date:	Thu, 02 Feb 2012 09:33:10 -0700
From:	David Ahern <dsahern@...il.com>
To:	Jean-Michel Hautbois <jhautbois@...il.com>
CC:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Specifying some processes to record using perf


On 02/02/2012 08:52 AM, Jean-Michel Hautbois wrote:
> Hi all,
> 
> I am using perf and I have several process and threads to record.
> I know that some threads in particular are interesting, and I don't
> find a way to specify multiple threads in perf record.
> The "-t" option takes only one thread IIUC.
> I don't know if the "--cgroup" is intended to do that, but I didn't
> succeed to use it...
> 
> I would also like to exclude one specific process (or thread) when I
> do a system-wide record, and I think it is not possible either ?
> 
> Thanks in advance !
> Regards,
> JM
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Right now pef-record can only do only 1 process or 1 thread. I started
working on a patch to support multiple of both (e.g., allow multiple -t
or -p arguments), but I have not finished it.

Other options: Arnaldo recently added a uid option or you can record for
all processes and filter the output to just your processes/threads of
interest.

David
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