From owner-freebsd-multimedia Thu Dec 18 03:52:47 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id DAA12050 for multimedia-outgoing; Thu, 18 Dec 1997 03:52:47 -0800 (PST) (envelope-from owner-freebsd-multimedia) Received: from dyson.iquest.net (dyson.iquest.net [198.70.144.127]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id DAA12045 for ; Thu, 18 Dec 1997 03:52:43 -0800 (PST) (envelope-from toor@dyson.iquest.net) Received: (from root@localhost) by dyson.iquest.net (8.8.8/8.8.8) id GAA00738; Thu, 18 Dec 1997 06:52:39 -0500 (EST) (envelope-from toor) Message-Id: <199712181152.GAA00738@dyson.iquest.net> Subject: Re: 3.0-current plug for IDE DMA -- very nice! In-Reply-To: <19971217222428.27336@ct.picker.com> from Randall Hopper at "Dec 17, 97 10:24:28 pm" To: rhh@ct.picker.com (Randall Hopper) Date: Thu, 18 Dec 1997 06:52:39 -0500 (EST) Cc: multimedia@FreeBSD.ORG From: "John S. Dyson" Reply-To: dyson@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL31 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-multimedia@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Randall Hopper said: > Now pop in 3.0-971208-SNAP with wdc flags 0xa0ffa004, and we now get: > > # dd if=/dev/rwd0 of=/dev/null bs=1m count=200 > 209715200 bytes transferred in 22.699848 secs (9238617 bytes/sec) > ^^^^^^^ > > That's a pretty "respectable" improvement, IMO. :-) BTW, this is on a > P55T2P4 MB w/ P233MMX, 48MB phys w/ 96MB swap. > Note that the throughput performance isn't as big as the improvement (decrease) in CPU usage. You will have "MEGA" spare cycles to do useful things when going to a IDE DMA or Ultra DMA interface. -- John | Never try to teach a pig to sing, dyson@freebsd.org | it just makes you look stupid, jdyson@nc.com | and it irritates the pig.