linux-kernel - Re: Netperf UDP_STREAM regression due to not sending IPIs in ttwu

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Message-ID: <506B6F59.8060800@hp.com>
Date:	Tue, 02 Oct 2012 15:48:57 -0700
From:	Rick Jones <rick.jones2@...com>
To:	Mel Gorman <mgorman@...e.de>
CC:	Mike Galbraith <efault@....de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Richard Jones <rick.jones2@...com>
Subject: Re: Netperf UDP_STREAM regression due to not sending IPIs in ttwu_queue()

On 10/02/2012 01:45 AM, Mel Gorman wrote:

> SIZE=64
> taskset -c 0 netserver
> taskset -c 1 netperf -t UDP_STREAM -i 50,6 -I 99,1 -l 20 -H 127.0.0.1 -- -P 15895 -s 32768 -S 32768 -m $SIZE -M $SIZE

Just FYI, unless you are running a hacked version of netperf, the "50" 
in "-i 50,6" will be silently truncated to 30.

happy benchmarking,

rick jones

PS - I trust it is the receive-side throughput being reported/used with 
UDP_STREAM :)
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