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On Mon, Nov 06, 2006 at 10:17:37PM +0100, Eric Dumazet (dada1@cosmosbay.com) wrote: > AF_INET > # ./epoll_bench -n 2000 -i > 2000 handles setup > 69210 evts/sec 2.97224 samples per call > 59436 evts/sec 12876 ctxt/sec 5.48675 samples per call > 60722 evts/sec 12093 ctxt/sec 8.03185 samples per call > 60583 evts/sec 14582 ctxt/sec 10.5644 samples per call > 58192 evts/sec 12066 ctxt/sec 12.999 samples per call > 54291 evts/sec 10613 ctxt/sec 15.2398 samples per call > 47978 evts/sec 10942 ctxt/sec 17.2222 samples per call > 59009 evts/sec 13692 ctxt/sec 19.6426 samples per call > 58248 evts/sec 15099 ctxt/sec 22.0306 samples per call > 58708 evts/sec 15118 ctxt/sec 24.4497 samples per call > 58613 evts/sec 14608 ctxt/sec 26.816 samples per call > 58490 evts/sec 13593 ctxt/sec 29.1708 samples per call > 59108 evts/sec 15078 ctxt/sec 31.5557 samples per call > 59636 evts/sec 15053 ctxt/sec 33.9292 samples per call > 59355 evts/sec 15531 ctxt/sec 36.2914 samples per call > Avg: 58771 evts/sec > > The last sample shows that epoll overhead is very small indeed, since > disabling it doesnt boost AF_INET perf at all. > AF_INET + no epoll > # ./epoll_bench -n 2000 -i -f > 2000 handles setup > 79939 evts/sec > 78468 evts/sec 9989 ctxt/sec > 73153 evts/sec 10207 ctxt/sec > 73668 evts/sec 10163 ctxt/sec > 73667 evts/sec 20084 ctxt/sec > 74106 evts/sec 10068 ctxt/sec > 73442 evts/sec 10119 ctxt/sec > 74220 evts/sec 10122 ctxt/sec > 74367 evts/sec 10097 ctxt/sec > 64402 evts/sec 47873 ctxt/sec > 53555 evts/sec 58733 ctxt/sec > 46000 evts/sec 48984 ctxt/sec > 67052 evts/sec 21006 ctxt/sec > 68460 evts/sec 12344 ctxt/sec > 67629 evts/sec 10655 ctxt/sec > Avg: 69475 evts/sec Without epoll number of events/sec is about 18% more - 58k vs 69k. -- Evgeniy Polyakov - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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