Date: Wed, 13 Feb 2002 17:14:54 +0600 From: Alexey Dokuchaev <danfe@cytherea.weblab.nsu.ru> To: Kip Macy <kmacy@netapp.com> Cc: thttpd@acme.com, hackers@FreeBSD.ORG Subject: Re: THTTPD web server: problems with KQUEUE on FreeBSD 4.5-STABLE Message-ID: <20020213171454.D14414@cytherea.weblab.nsu.ru> In-Reply-To: <Pine.GSO.4.10.10202130214170.25935-100000@cranford>; from kmacy@netapp.com on Wed, Feb 13, 2002 at 02:29:30AM -0800 References: <20020213160014.A97359@cytherea.weblab.nsu.ru> <Pine.GSO.4.10.10202130214170.25935-100000@cranford>
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On Wed, Feb 13, 2002 at 02:29:30AM -0800, Kip Macy wrote: > > > I still wonder, whether this problem occurs because of how thttpd does > > things, or how FreeBSD implements kqueue stuff, however, I am not sure > > I take it you don't have any logs for 4.4? > You mean, webserver logs on FreeBSD 4.4? I don't have them, however, this problem did take place, and it persisted after upgrading to 4.5. Sad but true :( > > > And one more question: out of kqread()/poll()/select() methods, which one > > is more likely to perform better, both under normal server access, and > > Under normal load it doesn't matter. Under heavy load there can be no > comparison. > see: > http://www.kegel.com/dkftpbench/Poller_bench.html > > This excerpt is the FreeBSD relevant portion: > > > With 1 active socket amongst 100, 1000, or 10000 total sockets, > waitAndDispatchEvents takes the following amount of wall-clock time, in > microseconds (lower is faster): > > On a single processor 600Mhz Pentium-III with 512MB of memory, running FreeBSD > 4.x-STABLE (results contributed by Jonathan Lemon): > > pipes 100 1000 10000 30000 > select 54 - - - > poll 50 552 11559 35178 > kqueue 8 8 8 8 > > (Note: Jonathan also varied the number of active pipes, and found that kqueue's > time scaled linearly with that number, whereas poll's time scaled linearly with > number of total pipes.) > Hmm... It looks like kqueue is really the way to go... I think I should do a bit further investigation on this subject, since poll() does not satisfy me anymore :) Regards, Alexey D. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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