Re: Syslets, Threadlets, generic AIO support, v6

[Jeff Garzik <jeff@garzik.org>]

Ingo Molnar wrote:
> * Jeff Garzik <jeff@garzik.org> wrote:
>
> > You should pick up the kevent work :)
>
> 3 months ago i verified the published kevent vs. epoll benchmark and 
> found that benchmark to be fatally flawed. When i redid it properly 
> kevent showed no significant advantage over epoll. Note that i did those 
> measurements _before_ the recent round of epoll speedups. So unless 
> someone does believable benchmarks i consider kevent an over-hyped, 
> mis-benchmarked complication to do something that epoll is perfectly 
> capable of doing.

You snipped the key part of my response, so I'll say it again:

Event rings (a) most closely match what is going on in the hardware and 
(b) often closely match what is going on in multi-socket, event-driven 
software application.

To echo Uli and paraphrase an ad, "it's the interface, silly."

This is not something epoll is capable of doing, at the present time.

	Jeff


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