From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
benh@kernel.crashing.org, heiko.carstens@de.ibm.com,
paulus@samba.org, tony.luck@intel.com,
seto.hidetoshi@jp.fujitsu.com, jeremy@xensource.com,
a.p.zijlstra@chello.nl, mingo@elte.hu,
Alexey Dobriyan <adobriyan@gmail.com>
Subject: Re: [RFC][PATCH] /proc/stat idle field for idle cpus
Date: Mon, 20 Apr 2009 09:15:04 +0200 [thread overview]
Message-ID: <20090420091504.0f619d8f@skybase> (raw)
In-Reply-To: <20090417160211.4fa36fb7.akpm@linux-foundation.org>
On Fri, 17 Apr 2009 16:02:11 -0700
Andrew Morton <akpm@linux-foundation.org> wrote:
> Looks OK to me. Please merge it via the s390 tree.
>
> Do other architectures need to fix this?
Thanks Andrew for the quick review. Other architecture might want to
implement this as well, with tick-less the idle numbers in /proc/stat
are just way off. The implementation of the arch_idle_time is not easy
I'm afraid, the sleep time of each cpu needs to be measured in a way
that it can be read from neighbouring cpus (and it should better be a
precise). Not something I would want to have to implement for x86.
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
prev parent reply other threads:[~2009-04-20 7:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-14 12:18 [RFC][PATCH] /proc/stat idle field for idle cpus Martin Schwidefsky
2009-04-17 23:02 ` Andrew Morton
2009-04-20 7:15 ` Martin Schwidefsky [this message]
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