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

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Date:	Thu, 15 Apr 2010 20:32:19 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	hadi@...erus.ca
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Tom Herbert <therbert@...gle.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	netdev@...r.kernel.org, robert@...julf.net,
	David Miller <davem@...emloft.net>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: rps perfomance WAS(Re: rps: question

On Thu, Apr 15, 2010 at 8:10 PM, jamal <hadi@...erus.ca> wrote:
> On Wed, 2010-04-14 at 22:57 +0200, Eric Dumazet wrote:
>
>> On my Nehalem machine (16 logical cpus), its NetXtreme II BCM57711E
>> 10Gigabit has 16 queues. It might be good to use less queues according
>> to your results on some workloads, and eventually use RPS on a second
>> layering.
>

For historical reason, we use Linux-2.6.18. Our company have several
products with CPU Xen, P4, or i7. Some of them are SMP, Multi-Core and
Multi-Threaded. We use the similar mechanism like dynamic weighted
RPS. The total throughput is increased nearly linear with the number
of the worker threads(one worker thread per CPU).

-- 
Regards，
Changli Gao(xiaosuo@...il.com)
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