Date: Wed, 14 Jan 1998 20:59:55 +0100 From: sthaug@nethelp.no To: lcremean@tidalwave.net Cc: hackers@FreeBSD.ORG Subject: Re: Any good comparison of Linux/FreeBSD/NetBSD/OpenBSD/Hurd? Message-ID: <9951.884807995@verdi.nethelp.no> In-Reply-To: Your message of "Wed, 14 Jan 1998 11:59:56 -0500" References: <19980114115956.58321@wakky.dyn.ml.org>
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> What are your flags on wdc0 and wdc1? Bit 0x2000 has to be set for each > drive to enable DMA support on that drive. You flags should be something > like 0xa0ffa0ff (which enables all the performance features, including DMA). Thanks, that made a world of difference. I'm now getting basically the same results from the raw device for the EIDE disk: # dd if=/dev/rwd0 of=/dev/null count=5000 bs=32768 5000+0 records in 5000+0 records out 163840000 bytes transferred in 16.030623 secs (10220439 bytes/sec) but vmstat now gives me 96% idle time instead of 57% or so. Nice! Steinar Haug, Nethelp consulting, sthaug@nethelp.no
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