Date: Sat, 22 Apr 2000 20:05:24 -0700 From: Kent Stewart <kstewart@3-cities.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Michael Bacarella <mbac@nyct.net>, Alfred Perlstein <bright@wintelcom.net>, Kevin Day <toasty@dragondata.com>, hackers@FreeBSD.ORG Subject: Re: Double buffered cp(1) Message-ID: <39026874.F652A405@3-cities.com> References: <Pine.BSF.4.21.0004221320250.38433-100000@bsd1.nyct.net> <200004221736.KAA55484@apollo.backplane.com> <3901F277.66DDDDAF@3-cities.com> <200004222317.QAA56834@apollo.backplane.com>
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Matthew Dillon wrote: > > :I tested build worlds where I created my /usr/obj on one controller > :and left the /usr/src on a different controller. The buildworlds are > :pretty much I/O bound. They ran faster but not that much faster when > > Buildworlds are NOT I/O bound. They are *CPU* bound. This becomes > glaringly obvious when you mount /usr/src and /usr/obj over NFS > and look at the network traffic. > > You are right but that is because I haven't started keeping record on 4.0-Stable and we were comparing apples and oranges. A buildworld of 3.4-Stable required around 2000u seconds using gcc-2.8.2 on my system. Setiathome, which is running at a nice of 19, still consumed 90% of the cpu. A buildworld on 4.0-Stable required 3500u seconds using gcc-2.95.2 and setiathome didn't accrue any appreciable cpu time during the build. There were definitely some changes there :). Kent -- Kent Stewart Richland, WA mailto:kstewart@3-cities.com http://www.3-cities.com/~kstewart/index.html FreeBSD News http://daily.daemonnews.org/ SETI(Search for Extraterrestrial Intelligence) @ HOME http://setiathome.ssl.berkeley.edu/ Hunting Archibald Stewart, b 1802 in Ballymena, Antrim Co., NIR http://www.3-cities.com/~kstewart/genealogy/archibald_stewart.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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