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

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Date:	Tue, 19 Jun 2007 12:28:49 -0400
From:	jamal <hadi@...erus.ca>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
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, 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.

Again, thanks Evgeniy.

cheers,
jamal

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