From: "Gregory Haskins" <ghaskins@novell.com>
To: "Paul Jackson" <pj@sgi.com>
Cc: <a.p.zijlstra@chello.nl>, <mingo@elte.hu>,
<dmitry.adamushko@gmail.com>, <rostedt@goodmis.org>,
<menage@google.com>, <rientjes@google.com>, <tong.n.li@intel.com>,
<tglx@linutronix.de>, <akpm@linux-foundation.org>,
<dhaval@linux.vnet.ibm.com>, <vatsa@linux.vnet.ibm.com>,
<sgrubb@redhat.com>, <linux-kernel@vger.kernel.org>,
<ebiederm@xmission.com>, <nickpiggin@yahoo.com.au>
Subject: Re: scheduler scalability - cgroups, cpusets and load-balancing
Date: Tue, 29 Jan 2008 14:07:58 -0700 [thread overview]
Message-ID: <479F4F5E.BA47.005A.0@novell.com> (raw)
In-Reply-To: <20080129150234.b57ce988.pj@sgi.com>
>>> On Tue, Jan 29, 2008 at 4:02 PM, in message
<20080129150234.b57ce988.pj@sgi.com>, Paul Jackson <pj@sgi.com> wrote:
> Gregory wrote:
>> > ... (1) turning off
>> > sched_load_balance in any overlapping cpusets, including all
>> > encompassing parent cpusets, (2) leaving sched_load_balance on in the
>> > RT cpuset itself, and ...
>>
>> Technically you only need (2). I run my 4-8 core development systems
>> in the single default global cpuset, normally.
>
> Well, if you're running in the default cpuset, then you automatically get
> (1),
> because sched_load_balance is turned off in all overlapping cpusets (there
> aren't any overlapping cpusets!)
>
> So, yes, you -do- need both (1) and (2). In your normal system, you
> just happen to get (1) effortlessly.
Ah. Well see, I am just showing my ignorance of this area of the cpuset code then. I stand corrected, and sorry for the noise. :)
-Greg
next prev parent reply other threads:[~2008-01-29 21:14 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-29 9:53 scheduler scalability - cgroups, cpusets and load-balancing Peter Zijlstra
2008-01-29 10:01 ` Paul Jackson
2008-01-29 10:50 ` Peter Zijlstra
2008-01-29 11:13 ` Paul Jackson
2008-01-29 11:31 ` Peter Zijlstra
2008-01-29 11:53 ` Paul Jackson
2008-01-29 12:07 ` Peter Zijlstra
2008-01-29 12:36 ` Paul Jackson
2008-01-29 12:03 ` Paul Jackson
2008-01-29 12:30 ` Peter Zijlstra
2008-01-29 12:52 ` Paul Jackson
2008-01-29 13:38 ` Peter Zijlstra
2008-01-29 10:57 ` Peter Zijlstra
2008-01-29 11:30 ` Paul Jackson
2008-01-29 11:34 ` Paul Jackson
2008-01-29 11:50 ` Peter Zijlstra
2008-01-29 12:12 ` Paul Jackson
2008-01-29 15:57 ` Gregory Haskins
2008-01-29 16:33 ` Paul Jackson
2008-01-29 15:50 ` Gregory Haskins
2008-01-29 16:51 ` Paul Jackson
2008-01-29 17:21 ` Gregory Haskins
2008-01-29 19:04 ` Paul Jackson
2008-01-29 20:36 ` Gregory Haskins
2008-01-29 21:02 ` Paul Jackson
2008-01-29 21:07 ` Gregory Haskins [this message]
2008-01-29 15:36 ` Gregory Haskins
2008-01-29 16:28 ` Paul Jackson
2008-01-29 16:42 ` Gregory Haskins
2008-01-29 19:37 ` Paul Jackson
2008-01-29 20:28 ` Gregory Haskins
2008-01-29 20:56 ` Paul Jackson
2008-01-29 21:02 ` Gregory Haskins
2008-01-29 22:23 ` Steven Rostedt
2008-01-29 12:32 ` Srivatsa Vaddagiri
2008-01-29 12:21 ` Paul Jackson
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