Date: Wed, 16 Dec 1998 22:49:14 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: dot@dotat.at (Tony Finch) Cc: smp@FreeBSD.ORG Subject: Re: Pthreads and SMP Message-ID: <199812162249.PAA04662@usr09.primenet.com> In-Reply-To: <E0zqIVn-0000OX-00@fanf.noc.demon.net> from "Tony Finch" at Dec 16, 98 03:05:15 pm
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> >The select() mechanism and asynch io is also a viable, albeit conceptually > >more difficult to implement for the average programmer. > > The main problem with select() with disk IO is that you are still > limited by seek times. Squid gets around this problem in the latest > version by using threading, but this is no use if the threading libray > is userland-only :-( Explicitly ask for read ahead on things you will need in the future: madvise( ..., ..., MADV_SEQUENTIAL); madvise( ..., ..., MADV_WILLNEED); Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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