Date: Fri, 24 Oct 2008 22:15:25 -0700 (PDT)
Message-Id: <20081024.221525.259940836.davem@davemloft.net>
To: efault@gmx.de
Cc: rjw@sisk.pl, mingo@elte.hu, s0mbre@tservice.net.ru, a.p.zijlstra@chello.nl,
       linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [tbench regression fixes]: digging out smelly deadmen.
From: David Miller <davem@davemloft.net>
In-Reply-To: <1224907501.5161.36.camel@marge.simson.net>
References: <200810250025.35734.rjw@sisk.pl>
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	<1224907501.5161.36.camel@marge.simson.net>
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From: Mike Galbraith <efault@gmx.de>
Date: Sat, 25 Oct 2008 06:05:01 +0200

> My test data indicates (to me anyway) that there is another source of
> localhost throughput loss in .27.  In that data, there is no hrtick
> overhead since I didn't have highres timers enabled, and computational
> costs added in .27 were removed.  Dunno where it lives, but it does
> appear to exist.

Disabling TSO on loopback doesn't fix that bit for you?

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