From: Dave Jones <davej@redhat.com>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: sched domains oddness.
Date: Fri, 31 Oct 2008 13:17:21 -0400 [thread overview]
Message-ID: <20081031171721.GA8837@redhat.com> (raw)
In-Reply-To: <20081031170928.GB10468@linux-os.sc.intel.com>
On Fri, Oct 31, 2008 at 10:09:29AM -0700, Suresh Siddha wrote:
> > looks like someone is triggering rebuild_sched_domains(), is something
> > poking cpusetfs files or flipping between sched_mc settings?
>
> I remember someone mentioning that some distro's started setting
> sched_mc_power_savings to '1' by default during boot. On a dual-core
> laptop, this will not give any advantage.
>
> I have to fix the code to not export this tunable, when we have only
> socket in the system.
>
> Dave, Is your distro also setting this tunable blindly during boot :(
(13:15:25:davej@vaio:~)$ cat /sys/devices/system/cpu/sched_mc_power_savings
0
So no, unless something set it to 1, and then back to 0.
A grep of etc shows up nothing in initscripts. Does hal or something
play with this?
Dave
--
http://www.codemonkey.org.uk
next prev parent reply other threads:[~2008-10-31 17:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-31 16:24 sched domains oddness Dave Jones
2008-10-31 16:51 ` Peter Zijlstra
2008-10-31 17:09 ` Suresh Siddha
2008-10-31 17:17 ` Dave Jones [this message]
2008-10-31 17:37 ` Dave Jones
2008-10-31 17:58 ` Suresh Siddha
2008-10-31 19:08 ` Dave Jones
2008-10-31 17:19 ` Dave Jones
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