From: Ingo Molnar <mingo@elte.hu>
To: Paul Jackson <pj@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
nickpiggin@yahoo.com.au, Paul Menage <menage@google.com>,
linux-kernel@vger.kernel.org,
Dinakar Guniguntala <dino@in.ibm.com>,
cpw@sgi.com
Subject: Re: [PATCH] cpuset and sched domains: sched_load_balance flag
Date: Sun, 30 Sep 2007 19:33:40 +0200 [thread overview]
Message-ID: <20070930173340.GA13066@elte.hu> (raw)
In-Reply-To: <20070930104403.24828.48263.sendpatchset@jackhammer.engr.sgi.com>
* Paul Jackson <pj@sgi.com> wrote:
> Add a new per-cpuset flag called 'sched_load_balance'.
>
> When enabled in a cpuset (the default value) it tells the kernel
> scheduler that the scheduler should provide the normal load balancing
> on the CPUs in that cpuset, sometimes moving tasks from one CPU to a
> second CPU if the second CPU is less loaded and if that task is
> allowed to run there.
>
> When disabled (write "0" to the file) then it tells the kernel
> scheduler that load balancing is not required for the CPUs in that
> cpuset.
i like this, this feature would be quite useful for -rt and CPU
shielding.
( a cpuset is a mandatory container for set_cpus_allowed(), so there is
a material and app-visible difference between a 4-CPU cpuset that has
balancing disabled and 4x 1-CPU cpusets. )
Ingo
next prev parent reply other threads:[~2007-09-30 17:34 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-30 10:44 [PATCH] cpuset and sched domains: sched_load_balance flag Paul Jackson
2007-09-29 19:21 ` Nick Piggin
2007-09-30 18:07 ` Paul Jackson
2007-09-30 3:34 ` Nick Piggin
2007-10-01 3:42 ` Paul Jackson
2007-10-02 13:05 ` Nick Piggin
2007-10-03 6:58 ` Paul Jackson
2007-10-02 16:09 ` Nick Piggin
2007-10-03 9:55 ` Paul Jackson
2007-10-02 17:56 ` Nick Piggin
2007-10-03 11:38 ` Paul Jackson
2007-10-02 19:25 ` Nick Piggin
2007-10-03 12:14 ` Paul Jackson
2007-10-02 19:53 ` Nick Piggin
2007-10-03 12:41 ` Paul Jackson
2007-10-02 20:30 ` Nick Piggin
2007-10-03 17:46 ` Paul Jackson
2007-10-03 12:17 ` Paul Jackson
2007-10-02 20:31 ` Nick Piggin
2007-10-03 17:44 ` Paul Jackson
2007-10-01 18:15 ` Paul Jackson
2007-10-02 13:35 ` Nick Piggin
2007-10-03 6:22 ` [patch] sched: fix sched-domains partitioning by cpusets Ingo Molnar
2007-10-03 6:56 ` Paul Jackson
2007-10-02 15:46 ` Nick Piggin
2007-10-03 9:21 ` Paul Jackson
2007-10-02 17:23 ` Nick Piggin
2007-10-03 10:08 ` Paul Jackson
2007-10-03 9:35 ` Ingo Molnar
2007-10-03 9:39 ` Paul Jackson
2007-10-02 17:29 ` Nick Piggin
2007-10-03 7:20 ` Ingo Molnar
2007-10-03 7:25 ` [PATCH] cpuset and sched domains: sched_load_balance flag Paul Jackson
2007-10-02 16:14 ` Nick Piggin
2007-09-30 10:44 ` [PATCH] cpuset decrustify update and validate masks Paul Jackson
2007-09-30 17:33 ` Ingo Molnar [this message]
2007-10-02 20:22 ` [PATCH] cpuset and sched domains: sched_load_balance flag Randy Dunlap
2007-10-02 20:57 ` Paul Jackson
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