Date: Tue, 24 Oct 2000 22:56:37 -0500 From: Jonathan Lemon <jlemon@flugsvamp.com> To: Dan Kegel <dank@alumni.caltech.edu> Cc: chat@freebsd.org Subject: kqueue Message-ID: <20001024225637.A54554@prism.flugsvamp.com>
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I recently stumbled across a message you posted asking for microbenchmarks on kqueue. While I do think that microbenchmarks are partially misleading, I did run them on my machine for various numbers of connections, with varying number of active connections. The results are shown below. The results dovetail with what I expect: kqueue scales depending on the number of active connections that it sees, not with the total number of connections. Also, I presented a paper/talk at the recent BSDCon 2000, these are available at http://www.freebsd.org/~jlemon if you're interested. -- Jonathan This is on a single processor 600Mhz Pentium-III with 512MB of memory, running FreeBSD 4.x-STABLE: cache[10:13pm]> ./Poller_bench 5 1 spk XXX pipes 100 1000 10000 30000 select 54 - - - poll 50 552 11559 35178 kqueue 8 8 8 8 cache[10:13pm]> ./Poller_bench 5 10 spk XXX pipes 100 1000 10000 30000 select 100 - - - poll 95 571 11697 35499 kqueue 52 52 55 56 cache[10:13pm]> ./Poller_bench 5 50 spk XXX pipes 100 1000 10000 30000 select 299 - - - poll 287 887 12124 36054 kqueue 285 295 313 330 cache[10:13pm]> ./Poller_bench 5 100 spk XXX 14 microseconds to open each of 100 socketpairs pipes 100 1000 10000 30000 select 542 - - - poll 528 1091 12440 36530 kqueue 574 592 623 702 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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