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

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Date:	Tue, 19 Jun 2007 12:32:48 -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 18:09 +0400, Evgeniy Polyakov wrote:
> On Tue, Jun 19, 2007 at 06:00:39PM +0400, Evgeniy Polyakov (johnpol@....mipt.ru) wrote:

> > 
> > pktgen reults are quite poor:
> > batch (changed from default script: count reduced, clone increased to 10k)
> > 241319pps 115Mb/sec

BTW, dont turn on the cloning - leave it as 1 so we can have every
packet alloced so as to have worst case scenario.
 
> > mainline (the same script, on start it wrote about unsupported batch_low
> > parameter:
> > 497520pps 238Mb/sec
> 
> 
> And here is with batch_low=400:

I am going to get rid of that batch param - it doesnt seem to matter
what that value is in the long run.



> Result: OK: T4143884(U4143864+I20+A4007752+T127073) usec, P1000000 TE8511TS1(B60,-1frags)

So on average you have been sending about 120 packets per batch - which
should give you decent numbers. Lets see how Robert responds and if you
have time, turn off the kernel configs like i did.

cheers,
jamal



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