Re: [patch] epoll use unlocked wqueue operations ...

[Davide Libenzi <davidel@xmailserver.org>]

On Sun, 4 Jun 2006, Willy TARREAU wrote:

> > Well, we take a lock less but I can't say if it'll be measureable. The
> > test program above is not a performance thing though, just some code to
> > verify multiple threads doing waits on the same epoll fd.
>
> OK, so I ported your patch to 2.4 (+epoll-lt-0.22) because I have some
> code using it right there. At first, I thought I was observing measuring
> errors, but after about 6 reboots, I seem to observe a consistent 6.5%
> increase in the number of sessions/s on my fake web server on my dual
> athlon. It jumps from 14350 hits/s with epoll-lt-0.22 alone to 15300 with
> your patch. It seems much to me, but I'm sure I'm not dreaming (yet).

Ok, that's measureable :)


> I'll send you (offlist) an update to 2.4-epoll-lt-0.22 which incorporates
> this patch.

Thx for the patch. Got it and uploaded.


- Davide


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