Date: Thu, 14 Sep 1995 18:05:34 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: hardware@freebsd.org Subject: NCR PCI and system performance... Message-ID: <199509140835.SAA26640@genesis.atrad.adelaide.edu.au>
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Greetings hardware gurutype people 8) I have a bit of an interesting one here that I'd appreciate any input on. Config is P100/32M, NCR PCI SCSI, FreeBSD 2.0.5-RELEASE, 4G Hawk. The motherboard is a Soyo 5T A2/A5 Triton unit. The problem is basically that disk I/O kills everything else; something as simple as unpacking a large tarfile drives response into the ground. Disk performance itself isn't a problem; I get around 4M/sec in both directions accoding to iozone, and the system isn't thrashing, or running anything more than a few xterms. Something that caught my eye in the BIOS setup (Award) for this machine were the following options : PCI concurrency, PCI streaming, PCI bursting. All of which are enabled. Not being a PCI guru, I ask : what are these? Why would they be on? Would I be well served by turning them off? -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] My car has "demand start" -Terry Lambert UNIX: live FreeBSD or die! [[
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