From: Ingo Molnar <mingo@elte.hu>
To: Jan Glauber <jang@linux.vnet.ibm.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
LKML <linux-kernel@vger.kernel.org>,
vatsa@linux.vnet.ibm.com, mschwid2@linux.vnet.ibm.com,
efault@gmx.de, dmitry.adamushko@gmail.com, paulus@samba.org,
anton@samba.org
Subject: Re: [PATCH] virtual sched_clock() for s390
Date: Thu, 19 Jul 2007 21:38:40 +0200 [thread overview]
Message-ID: <20070719193840.GA29523@elte.hu> (raw)
In-Reply-To: <1184872821.5516.10.camel@localhost.localdomain>
* Jan Glauber <jang@linux.vnet.ibm.com> wrote:
> > still, CFS needs time measurement across idle periods as well, for
> > another purpose: to be able to do precise task statistics for /proc.
> > (for top, ps, etc.) So it's still true that sched_clock() should
> > include idle periods too.
>
> I'm not sure, s390 already has an implemetation for precise accounting
> in the architecture code, does CFS also improve accounting data?
what kind of precise accounting does s390 have in the architecture code?
CFS changes task (and load) accounting to be sched_clock() driven in
essence.
Ingo
next prev parent reply other threads:[~2007-07-19 19:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-19 10:57 [PATCH] virtual sched_clock() for s390 Jan Glauber
2007-07-19 15:29 ` Jeremy Fitzhardinge
2007-07-19 15:48 ` Srivatsa Vaddagiri
2007-07-19 16:00 ` Ingo Molnar
2007-07-19 19:20 ` Jan Glauber
2007-07-19 19:38 ` Ingo Molnar [this message]
2007-07-19 21:07 ` Jan Glauber
2007-07-20 1:01 ` Paul Mackerras
2007-07-20 6:03 ` Jeremy Fitzhardinge
2007-07-20 7:22 ` Ingo Molnar
2007-07-23 9:15 ` Jan Glauber
2007-07-23 13:24 ` Martin Schwidefsky
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