From: Andrew Morton <akpm@linux-foundation•org>
To: Maxim Uvarov <muvarov@ru•mvista.com>
Cc: linuxppc-dev@ozlabs•org, wli@holomorphy•com, pavel@ucw•cz,
dada1@cosmosbay•com
Subject: Re: [PATCH] Performance Stats: Kernel patch
Date: Tue, 8 May 2007 12:32:14 -0700 [thread overview]
Message-ID: <20070508123214.11b4f25c.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070508162650.704.83752.stgit@localhost.localdomain>
On Tue, 08 May 2007 16:26:51 +0000
Maxim Uvarov <muvarov@ru•mvista.com> wrote:
> From: Maxim Uvarov <muvarov@ru•mvista.com>
> To: Andrew Morton <akpm@linux-foundation•org>
> Cc: pavel@ucw•cz
> Cc: linuxppc-dev@ozlabs•org
> Cc: wli@holomorphy•com
> Cc: dada1@cosmosbay•com
> Cc: pavel@ucw•cz
Strange that linux-ppc was the only mailing list you copied?
> Subject: [PATCH] Performance Stats: Kernel patch
> Date: Tue, 08 May 2007 16:26:51 +0000
> User-Agent: StGIT/0.12.1
>
>
> Patch makes available to the user the following
> task and process performance statistics:
> * Involuntary Context Switches (task_struct->nivcsw)
> * Voluntary Context Switches (task_struct->nvcsw)
> * Number of system calls (added new counter
> thread_info->sysall_count)
>
> Statistics information is available from:
> 1. taskstats interface (Documentation/accounting/)
> 2. /proc/PID/status (task only).
>
> This data is useful for detecting hyperactivity
> patterns between processes.
syscall entry is a super-hotpath and there will be a developer revolt
if we go adding an incl to that path, sorry.
(Did that incl also cover the int 80 entry?)
next prev parent reply other threads:[~2007-05-08 19:33 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-08 16:26 [PATCH] Performance Stats: Kernel patch Maxim Uvarov
2007-05-08 19:32 ` Andrew Morton [this message]
2007-05-10 11:11 ` Maxim Uvarov
2007-05-10 18:12 ` Andrew Morton
2007-05-11 16:51 ` Maxim Uvarov
2007-05-11 17:23 ` Using kprobes [was " Linas Vepstas
2007-05-12 9:15 ` Christoph Hellwig
2007-05-21 15:28 ` Maxim Uvarov
2007-05-08 23:32 ` Linas Vepstas
2007-05-10 10:22 ` Maxim Uvarov
2007-05-10 16:47 ` Linas Vepstas
-- strict thread matches above, loose matches on Subject: below --
2007-05-10 11:42 Maxim Uvarov
2007-05-10 12:03 ` Pavel Machek
2007-05-10 18:25 ` Andrew Morton
2007-05-10 12:39 Maxim Uvarov
2007-05-10 12:38 ` Josh Boyer
2007-05-10 18:23 ` Maxim Uvarov
2007-05-11 17:13 Maxim Uvarov
2007-05-12 10:39 ` Andrea Righi
2007-05-22 17:19 Maxim Uvarov
2007-05-22 18:48 ` Dave Jones
2007-05-22 20:08 ` Andrew Morton
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