From owner-freebsd-hackers Sun Apr 26 18:50:14 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id SAA19972 for freebsd-hackers-outgoing; Sun, 26 Apr 1998 18:49:07 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id SAA19854 for ; Sun, 26 Apr 1998 18:47:02 -0700 (PDT) (envelope-from andrew@zeta.org.au) Received: from gurney.reilly.home (d13.syd2.zeta.org.au [203.26.11.13]) by godzilla.zeta.org.au (8.8.7/8.8.7) with ESMTP id LAA06098; Mon, 27 Apr 1998 11:41:11 +1000 Received: (from andrew@localhost) by gurney.reilly.home (8.8.8/8.8.5) id KAA14812; Mon, 27 Apr 1998 10:43:00 +1000 (EST) From: Andrew Reilly Message-Id: <199804270043.KAA14812@gurney.reilly.home> Date: Mon, 27 Apr 1998 10:43:00 +1000 (EST) Subject: Re: Context switch time To: gurney_j@resnet.uoregon.edu cc: gurney_j@efn.org, robert@cyrus.watson.org, freebsd-hackers@FreeBSD.ORG In-Reply-To: <19980425034313.55993@hydrogen.nike.efn.org> MIME-Version: 1.0 Content-Type: TEXT/plain; CHARSET=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 25 Apr, John-Mark Gurney wrote: > as far as context switching goes... that is a difficult subject... Stanford > did a paper comparing a few os's on context switch time and found that > Linux was able to get about 10ms switch time, but this assumed that you > had only a couple active processes... as soon as you went above 10 active > processes the context switch time grew to be >100ms, while FreeBSD pretty > much maintained a steady 100ms switch time for even 1k processes, while > linux grew to >700ms... (these numbers are from the top of my head) One would hope that they're us times, rather than ms? -- Andrew "The steady state of disks is full." -- Ken Thompson To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message