From owner-freebsd-hackers Sun Dec 24 12:51:11 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id MAA21566 for hackers-outgoing; Sun, 24 Dec 1995 12:51:11 -0800 (PST) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id MAA21554 for ; Sun, 24 Dec 1995 12:51:05 -0800 (PST) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id VAA18660; Sun, 24 Dec 1995 21:50:55 +0100 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id VAA12397; Sun, 24 Dec 1995 21:50:55 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.6.12/8.6.9) id VAA01340; Sun, 24 Dec 1995 21:33:56 +0100 From: J Wunsch Message-Id: <199512242033.VAA01340@uriah.heep.sax.de> Subject: Re: Pentium bcopy To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Sun, 24 Dec 1995 21:33:55 +0100 (MET) Cc: tege@matematik.su.se Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199512241006.VAA25049@godzilla.zeta.org.au> from "Bruce Evans" at Dec 24, 95 09:06:13 pm X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-hackers@freebsd.org Precedence: bulk As Bruce Evans wrote: > > >The approach has a significant penalty on a 386 (3x slower). > Not accurate enough. Use weights of 1000000 and 1 instead of 1000 > and 1/1000, or double precision. Once you've agreed to a single test strategy, i could also test it on a 386sx/16 (no cache at all) to see the penalty. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)