Re: rps perfomance WAS(Re: rps: question

Changli Gao
2010-04-16T06:02:50Z

On Fri, Apr 16, 2010 at 1:18 PM, Eric Dumazet <eric.dumazet@gmail.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@cyberus.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@gmail.com)