From: Eric Dumazet <dada1@cosmosbay.com>
To: Maxim Uvarov <muvarov@ru.mvista.com>
Cc: linux-kernel@vger.kernel.org, davidsen@tmr.com,
randy.dunlap@oracle.com, Valdis.Kletnieks@vt.edu,
jesper.juhl@gmail.com
Subject: Re: Performance Stats: Kernel patch
Date: Wed, 11 Apr 2007 16:15:36 +0200 [thread overview]
Message-ID: <20070411161536.926d79e1.dada1@cosmosbay.com> (raw)
In-Reply-To: <461CCD94.6010507@ru.mvista.com>
On Wed, 11 Apr 2007 15:59:16 +0400
Maxim Uvarov <muvarov@ru.mvista.com> wrote:
> Patch adds Process Performance Statistics.
> It make available to the user the following
> new per-process (thread) performance statistics:
> * Involuntary Context Switches
> * Voluntary Context Switches
> * Number of system calls
>
> This data is useful for detecting hyperactivity
> patterns between processes.
Your description is not very clear about the semantic of your stats.
You currently returns stats only for thread(s) (not process as you claimed)
Please check kernel/sys.c:k_getrusage() to see how getrusage() has to sum *lot* of individual fields to get precise process numbers (even counting stats for dead threads)
next prev parent reply other threads:[~2007-04-11 14:17 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-09 14:22 Maxim Uvarov
2007-04-10 8:21 ` Eric Dumazet
2007-04-11 11:59 ` Maxim Uvarov
2007-04-11 12:26 ` Eric Dumazet
2007-04-11 13:15 ` Maxim Uvarov
2007-04-11 14:15 ` Eric Dumazet [this message]
2007-04-11 15:33 ` Bill Davidsen
2007-04-11 15:57 ` Maxim Uvarov
2007-04-11 15:53 ` Maxim Uvarov
2007-04-11 19:22 ` Eric Dumazet
2007-04-12 13:46 ` Maxim Uvarov
2007-04-15 9:47 ` Pavel Machek
2007-04-15 10:21 ` William Lee Irwin III
2007-04-15 20:10 ` Pavel Machek
2007-04-16 1:04 ` William Lee Irwin III
2007-04-16 9:24 ` Maxim Uvarov
-- strict thread matches above, loose matches on Subject: below --
2007-04-03 12:54 Maxim Uvarov
2007-04-03 23:01 ` Valdis.Kletnieks
2007-04-04 13:15 ` Maxim Uvarov
2007-04-04 13:46 ` Eric Dumazet
2007-04-04 16:52 ` Maxim Uvarov
2007-04-04 18:04 ` Eric Dumazet
2007-04-04 21:54 ` Valdis.Kletnieks
2007-04-04 13:59 ` Jesper Juhl
2007-04-04 21:50 ` Valdis.Kletnieks
2007-04-04 22:03 ` Randy Dunlap
2007-04-06 21:50 ` Bill Davidsen
2007-04-08 16:58 ` Pavel Machek
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