netdev - Re: [WIP][PATCHES] Network xmit batching

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Message-ID: <20070619163557.GA17942@2ka.mipt.ru>
Date:	Tue, 19 Jun 2007 20:35:57 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	jamal <hadi@...erus.ca>
Cc:	Krishna Kumar2 <krkumar2@...ibm.com>,
	Gagan Arneja <gaagaan@...il.com>, netdev@...r.kernel.org,
	Rick Jones <rick.jones2@...com>,
	Sridhar Samudrala <sri@...ibm.com>,
	David Miller <davem@...emloft.net>,
	Robert Olsson <Robert.Olsson@...a.slu.se>
Subject: Re: [WIP][PATCHES] Network xmit batching

On Tue, Jun 19, 2007 at 12:28:49PM -0400, jamal (hadi@...erus.ca) wrote:
> On Tue, 2007-19-06 at 18:00 +0400, Evgeniy Polyakov wrote:
> 
> > pktgen reults are quite poor:
> > batch (changed from default script: count reduced, clone increased to 10k)
> > 241319pps 115Mb/sec
> > 
> > mainline (the same script, on start it wrote about unsupported batch_low
> > parameter:
> > 497520pps 238Mb/sec
> 
> What is your kernel config in regards to HRES timers? Robert mentioned
> to me that the clock source maybe causing issues with pktgen (maybe even
> qos). 
> Robert, insights?
> 
> In my case, I have:
> # CONFIG_TICK_ONESHOT is not set
> # CONFIG_NO_HZ is not set
> # CONFIG_HIGH_RES_TIMERS is not set
> 
> I will try to turn on those in a few days and see if notice a
> difference.

Essentially the same:

$ cat ./.config | egrep "CONFIG_TICK_ONESHOT|CONFIG_NO_HZ|CONFIG_HIGH_RES_TIMERS"
$ head Makefile 
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 22
EXTRAVERSION = -rc5
NAME = Holy Dancing Manatees, Batman!

-- 
	Evgeniy Polyakov
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