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

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Date:	Fri, 16 Apr 2010 14:02:29 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	hadi@...erus.ca, Rick Jones <rick.jones2@...com>,
	David Miller <davem@...emloft.net>, therbert@...gle.com,
	netdev@...r.kernel.org, robert@...julf.net, andi@...stfloor.org
Subject: Re: rps perfomance WAS(Re: rps: question

On Fri, Apr 16, 2010 at 1:18 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> Le vendredi 16 avril 2010 à 07:56 +0800, Changli Gao a écrit :
>> On Fri, Apr 16, 2010 at 4:16 AM, jamal <hadi@...erus.ca> wrote:
>> >
>> > Sounds interesting.
>> > Wikipedia information overload. Any arch description of the HP9000?
>> > Did your scheme use IPIs to message the other CPUs?
>> >
>>
>> If you doubt the cost of smp_call_function_single(), how about having
>> a try with my another patch, which implements the similar of RPS, but
>> uses kernel threads instead, so no explicit IPI.
>>
>> http://patchwork.ozlabs.org/patch/38319/
>>
>>
>
> Come on Changli.
>
> How do you wake up a thread on a remote cpu ?
>

resched IPI, apparently. But it is async absolutely. and its IRQ
handler is lighter.

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