Date: Thu, 18 Dec 1997 06:52:39 -0500 (EST) From: "John S. Dyson" <dyson@FreeBSD.ORG> To: rhh@ct.picker.com (Randall Hopper) Cc: multimedia@FreeBSD.ORG Subject: Re: 3.0-current plug for IDE DMA -- very nice! Message-ID: <199712181152.GAA00738@dyson.iquest.net> In-Reply-To: <19971217222428.27336@ct.picker.com> from Randall Hopper at "Dec 17, 97 10:24:28 pm"
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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.
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