From: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
To: Paul Jackson <pj@sgi.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>,
mbligh@google.com, nickpiggin@yahoo.com.au, akpm@osdl.org,
menage@google.com, Simon.Derr@bull.net,
linux-kernel@vger.kernel.org, dino@in.ibm.com,
rohitseth@google.com, holt@sgi.com, dipankar@in.ibm.com,
clameter@sgi.com
Subject: Re: [RFC] cpuset: remove sched domain hooks from cpusets
Date: Sun, 22 Oct 2006 22:43:30 -0700 [thread overview]
Message-ID: <20061022224330.A3120@unix-os.sc.intel.com> (raw)
In-Reply-To: <20061022225456.6adfd0be.pj@sgi.com>; from pj@sgi.com on Sun, Oct 22, 2006 at 10:54:56PM -0700
On Sun, Oct 22, 2006 at 10:54:56PM -0700, Paul Jackson wrote:
> Suresh wrote:
> > group of pinned tasks can completely skew the system load balancing..
>
> Ah - yes. That was a problem. If the load balancer couldn't offload
> tasks from one or two of the most loaded CPUs (perhaps because they
> were pinned.) it tended to give up.
>
> I believe that Christoph is actively working that problem. Adding him
> to the cc list, so he can explain the state of this work more
> accurately.
Pinned tasks can cause a number of challenges to scheduler.
Christoph has recently addressed one such issue and that too only partial.
It is very difficult to nicely and uniformly distribute the load pinned
to group of cpus..
next prev parent reply other threads:[~2006-10-23 6:04 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-19 9:23 [RFC] cpuset: remove sched domain hooks from cpusets Paul Jackson
2006-10-19 10:24 ` Nick Piggin
2006-10-19 19:03 ` Paul Jackson
2006-10-19 19:21 ` Nick Piggin
2006-10-19 19:50 ` Martin Bligh
2006-10-20 0:14 ` Paul Jackson
2006-10-20 16:03 ` Nick Piggin
2006-10-20 17:29 ` Siddha, Suresh B
2006-10-20 19:19 ` Paul Jackson
2006-10-20 19:00 ` Paul Jackson
2006-10-20 20:30 ` Dinakar Guniguntala
2006-10-20 21:41 ` Paul Jackson
2006-10-20 22:35 ` Dinakar Guniguntala
2006-10-20 23:14 ` Siddha, Suresh B
2006-10-21 5:37 ` Paul Jackson
2006-10-23 4:31 ` Siddha, Suresh B
2006-10-23 5:59 ` Paul Jackson
2006-10-21 23:05 ` Paul Jackson
2006-10-22 12:02 ` Paul Jackson
2006-10-23 3:09 ` Paul Jackson
2006-10-20 21:46 ` Paul Jackson
2006-10-21 18:23 ` Paul Menage
2006-10-21 20:55 ` Paul Jackson
2006-10-21 20:59 ` Paul Menage
2006-10-22 10:51 ` Paul Jackson
2006-10-23 5:26 ` Siddha, Suresh B
2006-10-23 5:54 ` Paul Jackson
2006-10-23 5:43 ` Siddha, Suresh B [this message]
2006-10-23 6:02 ` Nick Piggin
2006-10-23 6:16 ` Paul Jackson
2006-10-23 16:03 ` Christoph Lameter
2006-11-09 10:59 ` Paul Jackson
2006-10-23 16:01 ` Christoph Lameter
-- strict thread matches above, loose matches on Subject: below --
2006-10-30 21:26 [RFC] cpuset: Remove " Dinakar Guniguntala
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