netdev - Re: rps perfomance WAS(Re: rps: question

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Message-ID: <20100414115352.598521af@nehalam>
Date:	Wed, 14 Apr 2010 11:53:52 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	hadi@...erus.ca
Cc:	Tom Herbert <therbert@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org,
	robert@...julf.net, David Miller <davem@...emloft.net>,
	Changli Gao <xiaosuo@...il.com>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: rps perfomance WAS(Re: rps: question

On Wed, 14 Apr 2010 07:53:06 -0400
jamal <hadi@...erus.ca> wrote:

> Results:
> CPU utilization was about 20-30% higher in the case of rps. On cpu0, the
> cpu was being chewed highly by sky2_poll and on the redirected-to-core
> it was always smp_call_function_single

I posted a patch to use sky2 hardware hash (RSS) which should lower the
cost per packet.

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