Date: Fri, 21 Sep 2007 05:11:39 +0200
From: Willy Tarreau <w@1wt.eu>
To: Mike Galbraith <efault@gmx.de>
Cc: Tong Li <tong.n.li@intel.com>, Ingo Molnar <mingo@elte.hu>,
       dimm <dmitry.adamushko@gmail.com>, linux-kernel@vger.kernel.org,
       Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [git] CFS-devel, group scheduler, fixes
Message-ID: <20070921031139.GA19584@1wt.eu>
References: <20070918201622.GA1632@elte.hu> <Pine.LNX.4.64.0709182250120.9990@tongli.jf.intel.com> <1190183324.9737.7.camel@Homer.simpson.net> <1190188261.9185.21.camel@Homer.simpson.net> <1190191368.8687.5.camel@Homer.simpson.net> <Pine.LNX.4.64.0709190944560.11561@tongli.jf.intel.com> <1190264114.6411.4.camel@Homer.simpson.net> <1190272507.27867.20.camel@Homer.simpson.net> <20070920194813.GH10199@1wt.eu> <1190342455.6461.6.camel@Homer.simpson.net>
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On Fri, Sep 21, 2007 at 04:40:55AM +0200, Mike Galbraith wrote:
> On Thu, 2007-09-20 at 21:48 +0200, Willy Tarreau wrote:
> 
> > I don't know if this is relevant, but 4294966399 in nr_uninterruptible
> > for cpu#0 equals -897, exactly the negation of cpu1.nr_uninterruptible.
> > I don't know if this rings a bell for someone or if it's a completely
> > useless comment, but just in case...
> 
> A task can block on one cpu, and wake up on another, which isn't
> tracked, hence the fishy looking numbers.  The true nr_uninterruptible
> is the sum of all.

OK, thanks Mike for this clarification.

Willy

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