Date: Thu, 04 May 2000 23:33:31 +0200 From: sthaug@nethelp.no To: nik@freebsd.org Cc: mobile@freebsd.org Subject: Re: Heavy activity bogs down system Message-ID: <84832.957476011@verdi.nethelp.no> In-Reply-To: Your message of "Thu, 4 May 2000 12:05:38 %2B0100" References: <20000504120537.A5958@kilt.nothing-going-on.org>
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> I don't have a desktop system with IDE disks to compare this too (in fact, > I've never run another FreeBSD system without SCSI disks). Should I expect > IDE to have such an impact on system performance? ... > ide_pci0: <Intel PIIX4 Bus-master IDE controller> rev 0x01 on pci0.7.1 > [...] > wdc0 at 0x1f0-0x1f7 irq 14 on isa > wdc0: unit 0 (wd0): <IBM-DBCA-206480> Looks like you're using your IDE disk in the slowest possible mode (PIO etc). Have you tried DMA? On a nearby IDE disk here I have wdc0: unit 0 (wd0): <IBM-DTTA-351680>, DMA, 32-bit, multi-block-16 This is with the following flags in the kernel config: controller wdc0 at isa? port "IO_WD1" bio irq 14 flags 0xa0ffa0ff The difference between PIO and DMA can be dramatic. Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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