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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