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

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Message-ID: <z2g65634d661004152328hc72de2adgbeb20ec94af19b0@mail.gmail.com>
Date:	Thu, 15 Apr 2010 23:28:42 -0700
From:	Tom Herbert <therbert@...gle.com>
To:	Changli Gao <xiaosuo@...il.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>, hadi@...erus.ca,
	Rick Jones <rick.jones2@...com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	robert@...julf.net, andi@...stfloor.org
Subject: Re: rps perfomance WAS(Re: rps: question

>> 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.
>
The IPI used in RPS is done asynchronously.

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