From owner-freebsd-hackers Sun Aug 9 00:03:49 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id AAA19653 for freebsd-hackers-outgoing; Sun, 9 Aug 1998 00:03:49 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from bandicoot.prth.tensor.pgs.com (bandicoot.prth.tensor.pgs.com [157.147.224.1]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id AAA19645 for ; Sun, 9 Aug 1998 00:03:45 -0700 (PDT) (envelope-from shocking@ariadne.prth.tensor.pgs.com) Received: from ariadne.tensor.pgs.com (ariadne [157.147.227.36]) by bandicoot.prth.tensor.pgs.com (8.8.8/8.8.8) with SMTP id PAA23987; Sun, 9 Aug 1998 15:01:53 +0800 (WST) Received: from ariadne by ariadne.tensor.pgs.com (SMI-8.6/SMI-SVR4) id PAA00669; Sun, 9 Aug 1998 15:02:27 +0800 Message-Id: <199808090702.PAA00669@ariadne.tensor.pgs.com> X-Mailer: exmh version 2.0.2 2/24/98 To: hackers@FreeBSD.ORG cc: dg@root.com, jobaldwi@vt.edu, grog@lemis.com Subject: Re: AMD-specific kernel code (was: How long a wait?) In-reply-to: Your message of "Sat, 08 Aug 1998 23:49:51 MST." <199808090649.XAA23702@implode.root.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sun, 09 Aug 1998 15:02:27 +0800 From: Stephen Hocking-Senior Programmer PGS Tensor Perth Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > >The effect on CPU performance is also noticable: here are "make > >world" times: > > > >Without write allocate: > > > >real 106m58.441s > >user 63m0.960s > >sys 20m25.035s > > > >With write allocate: > > > >real 114m16.402s > >user 69m41.733s > >sys 17m54.862s > > It looks like something that should be a tunable knob of some sort. I tend to have processes that compute for a considerable period of time, which may benefit, but Joe Average's make world clearly won't. Try it as a option in the config file, or yet another flag to the npx device, or (best possible) a sysctl flag, so that one may turn it off & on as required while the system is up. Stephen -- The views expressed above are not those of PGS Tensor. "We've heard that a million monkeys at a million keyboards could produce the Complete Works of Shakespeare; now, thanks to the Internet, we know this is not true." Robert Wilensky, University of California To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message