From: Ingo Molnar <mingo@elte.hu>
To: Lin Ming <ming.m.lin@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-kernel <linux-kernel@vger.kernel.org>,
"Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Subject: Re: oltp ~10% regression with 2.6.27-rc5 on stoakley machine
Date: Thu, 4 Sep 2008 13:09:01 +0200 [thread overview]
Message-ID: <20080904110901.GD8668@elte.hu> (raw)
In-Reply-To: <1220525579.12161.8.camel@minggr>
* Lin Ming <ming.m.lin@intel.com> wrote:
> I observed schedstats of sysbench, there's more
> "nr_failed_migrations_hot"
>
> 2.6.27-rc4: se.nr_failed_migrations_hot 11
> 2.6.27-rc5: se.nr_failed_migrations_hot 95
>
> task migration failed because of task_hot, the system is un-balanced?
would be nice to get a representative (==steady state) scheduler trace
from the critical portions of that workload. See:
http://people.redhat.com/mingo/sched-devel.git/readme-tracer.txt
Ingo
next prev parent reply other threads:[~2008-09-04 11:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-04 8:51 oltp ~10% regression with 2.6.27-rc5 on stoakley machine Lin Ming
2008-09-04 9:03 ` Peter Zijlstra
2008-09-04 10:52 ` Lin Ming
2008-09-04 11:06 ` Peter Zijlstra
2008-09-04 12:12 ` Lin Ming
2008-09-04 12:26 ` Peter Zijlstra
2008-09-04 12:42 ` Lin Ming
2008-09-04 13:50 ` Gregory Haskins
2008-09-04 13:50 ` [PATCH 1/4] revert "sched: sched_cacheflush is now unused" Gregory Haskins
2008-09-04 13:50 ` [PATCH 2/4] Revert "[PATCH] sched: remove cache_hot_time" Gregory Haskins
2008-09-04 13:50 ` [PATCH 3/4] Revert "sched: zap the migration init / cache-hot balancing code" Gregory Haskins
2008-09-04 13:50 ` [PATCH 4/4] sched: make task_hot() once again use sd->cache_hot_time Gregory Haskins
2008-09-04 11:09 ` Ingo Molnar [this message]
2008-09-04 11:30 ` oltp ~10% regression with 2.6.27-rc5 on stoakley machine Lin Ming
2008-09-04 11:35 ` Ingo Molnar
2008-09-04 12:19 ` Lin Ming
2008-09-05 1:26 ` Lin Ming
2008-09-20 21:38 ` Peter Zijlstra
2008-09-26 2:00 ` Lin Ming
-- strict thread matches above, loose matches on Subject: below --
2008-09-04 7:06 Lin Ming
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