Date: Tue, 19 Oct 2004 15:16:53 -0400 From: Kenneth Culver <culverk@sweetdreamsracing.biz> To: Emanuel Strobl <Emanuel.Strobl@gmx.net> Cc: freebsd-current@freebsd.org Subject: Re: FreeBSD 5.3b7and poor ata performance Message-ID: <20041019151653.68c88wsgcw8gwos8@www.sweetdreamsracing.biz> In-Reply-To: <200410192102.00617.Emanuel.Strobl@gmx.net> References: <20041015190638.C5A0E5D04@ptavv.es.net> <200410192031.12504.Emanuel.Strobl@gmx.net> <20041019145838.g0c0kwk0wcss04ks@www.sweetdreamsracing.biz> <200410192102.00617.Emanuel.Strobl@gmx.net>
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Quoting Emanuel Strobl <Emanuel.Strobl@gmx.net>: > Am Dienstag, 19. Oktober 2004 20:58 schrieb Kenneth Culver: >> Quoting Emanuel Strobl <Emanuel.Strobl@gmx.net>: > [...] >> >> How is possible that FreeBSD performs as bad? >> > >> > I have to confirm that I also have even worse transfer rates. >> > It's a ICH2 (i815e) with a not so brand new 80GB WD, but I'd expext about >> > 50MB/s and I get 16MB/s. >> > >> > One interesting thing is that the transferrate is constant with >> > blocksizes from 256 Byte on. Only with a blocksize of 128 Bytes I can see >> > reduced throughput (10MB/s). >> > I can remember, when I last did such "esoteric" tests throughput reached >> > maximum at about 16k blocksize and rapidly degraded with blocksizes >> > smaller than 10k. But now only very very small blocksizes limit the >> > throughput! >> > >> > Some excerpts: (i815 ich2, 5.3-RC1, custom kernel) >> > >> > cale:/usr#22: atacontrol mode 0 >> > Master = UDMA100 >> > Slave = BIOSPIO >> > >> > ATA channel 0: >> > Master: ad0 <WDC WD800AB-00CBA0/03.06A03> ATA/ATAPI revision 5 >> > >> > atapci0: <Intel ICH2 UDMA100 controller> port >> > 0xffa0-0xffaf,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0 >> > ata0: channel #0 on atapci0 >> > ata1: channel #1 on atapci0 >> > >> > cale:/usr#25: uname -a >> > FreeBSD cale.flintsbach.schmalzbauer.de 5.3-STABLE FreeBSD 5.3-STABLE #4: >> > Sun Oct 17 02:33:58 CEST 2004 >> > root@cale.flintsbach.schmalzbauer.de:/usr/obj/usr/src/sys/CALE i386 >> >> your poor performance could be because you have a UDMA100 device on the >> same channel as a BIOSPIO device. I'd try taking the BIOSPIO device off >> that channel >> and see what happens. > > The BIOSPIO device is in fact no device :) woops, guess I missed that. I honestly don't know what to say then, My machine performs fine, actually better than I could hope for. I mean 114MB/sec on my raid 0 is pretty good. Ken > > ATA channel 0: > Master: ad0 <WDC WD800AB-00CBA0/03.06A03> ATA/ATAPI revision 5 > Slave: no device present > ATA channel 1: > Master: acd0 <LITE-ON DVD+RW LDW-401S/ES0K> ATA/ATAPI revision 5 > Slave: acd1 <DV-516E/3.01> ATA/ATAPI revision 5 > > Thanks, > > -Harry > >> >> Ken >> _______________________________________________ >> freebsd-current@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-current >> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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