Messages in this thread |  | | | Date | Mon, 11 Jul 2005 11:29:03 +0200 | | From | Eric Dumazet <> | | Subject | Re: [PATCH] eventpoll : Suppress a short lived lock from struct file |
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Peter Zijlstra a écrit : > On Mon, 2005-07-11 at 09:18 +0200, Eric Dumazet wrote: > > Have you tested the impact of this change on big SMP/NUMA machines? > I hate to see an Altrix crashing to its knees :-) >
I tested on a small NUMA machine (2 nodes), with a epoll enabled application, that use around 100 epoll ctl per second.
Of course, one may write a special benchmark on a BIG SMP/NUMA machine that defeat these patch, using thousands of epoll ctl per second, but, a normal (well written ?) epoll application doesnt constantly add/remove epoll ctl.
Should we waste 8 bytes per 'struct file' for a very unlikely micro benchmark ?
Eric
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