netdev - Re: [tbench regression fixes]: digging out smelly deadmen.

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Message-Id: <20081024.221525.259940836.davem@davemloft.net>
Date:	Fri, 24 Oct 2008 22:15:25 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	efault@....de
Cc:	rjw@...k.pl, mingo@...e.hu, s0mbre@...rvice.net.ru,
	a.p.zijlstra@...llo.nl, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [tbench regression fixes]: digging out smelly deadmen.

From: Mike Galbraith <efault@....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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