From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pierre Bourdon <pbourdon-SxHCd5+OuqTrt3ojHgZu+w@public.gmane.org>
Subject: Re: [Bugme-new] [Bug 16417] New: Slow context switches with SMP and
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Date: Mon, 02 Aug 2010 12:52:38 +0200
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References: <bug-16417-10286@https.bugzilla.kernel.org/>
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To: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org, Dhaval Giani <dhaval-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>, Srivatsa Vaddagiri <vatsa-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>, bugme-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org, Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>, Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
List-Id: containers.vger.kernel.org

On Mon, 02 Aug 2010 10:58:41 +0200, Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
wrote:
> Does: echo NO_LB_SHARES_UPDATE > /debug/sched_features
> (or wherever you mounted debugfs) help things?

It does not, sorry. Latency with lat_ctx is still high, and CPU usage with
cat | pv is still high too.

Regards,
-- 
Pierre Bourdon