From owner-freebsd-current Fri Oct 29 23: 1:33 1999 Delivered-To: freebsd-current@freebsd.org Received: from green.myip.org (localhost [127.0.0.1]) by hub.freebsd.org (Postfix) with ESMTP id BA8131507B for ; Fri, 29 Oct 1999 23:01:14 -0700 (PDT) (envelope-from green@FreeBSD.org) Received: from localhost ([127.0.0.1] ident=green) by green.myip.org with esmtp (Exim 3.02 #1) id 11hOxx-000Lao-00; Fri, 29 Oct 1999 23:14:06 -0400 Date: Fri, 29 Oct 1999 23:14:05 -0400 (EDT) From: Brian Fundakowski Feldman X-Sender: green@green.myip.org To: Alan Cox Cc: Bernd Walter , current@freebsd.org Subject: Re: copy-on-write optimized faults In-Reply-To: <19991029195243.E28768@cs.rice.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, 29 Oct 1999, Alan Cox wrote: > Thanks to Bernd and everyone else who has responded. Unless someone > reports a case where the old "optimization" gets applied more often > than 1 in ten million copy-on-write faults, I'm going to remove > the old code in a few days. At this frequency, the cost of deciding > whether or not to apply the optimization on every copy-on-write fault > is greater than what is saved those 26 times it is applied. I get about 1.5PPM optimized COW faults: 7734278 copy-on-write faults 12 copy-on-write optimized faults -- Brian Fundakowski Feldman \ FreeBSD: The Power to Serve! / green@FreeBSD.org `------------------------------' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message