linux-kernel - Re: Loopback and Nagle's algorithm

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Message-ID: <alpine.LRH.2.00.1104121354010.6953@twin.jikos.cz>
Date:	Tue, 12 Apr 2011 13:54:26 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Adam McLaurin <lkml@...tas.net>
Cc:	Will Newton <will.newton@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: Loopback and Nagle's algorithm

On Tue, 12 Apr 2011, Adam McLaurin wrote:

> > It may be caused by an increase in context switch rate, as both sender
> > and receiver are on the same machine.
> 
> I'm not sure that's what's happening, since the box where I'm running
> this test has 8 physical CPU's and 32 cores in total.

Have you tried firing up the testcase under perf, to see what it reveals 
as the bottleneck?

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

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