netdev - RE: [PATCH] net: add additional lock to qdisc to increase throughput

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Message-ID: <80769D7B14936844A23C0C43D9FBCF0F256284B068@orsmsx501.amr.corp.intel.com>
Date:	Fri, 21 May 2010 13:04:20 -0700
From:	"Duyck, Alexander H" <alexander.h.duyck@...el.com>
To:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH] net: add additional lock to qdisc to increase throughput

Eric Dumazet wrote:
> Tests with following script gave a boost from ~50.000 pps to ~600.000
> pps on a dual quad core machine (E5450 @3.00GHz), tg3 driver.
> (A single netperf flow can reach ~800.000 pps on this platform)
> 
> for j in `seq 0 3`; do
>   for i in `seq 0 7`; do
>     netperf -H 192.168.0.1 -t UDP_STREAM -l 60 -N -T $i -- -m 6 &
>   done
> done

Running the same script with your patch my results went from 200Kpps to 1.2Mpps on a dual Xeon 5570.

Acked-by: Alexander Duyck <alexander.h.duyck@...el.com>