Re: FreeBSD 5.3b7and poor ata performance

Quoting Emanuel Strobl <Emanuel.Strobl_at_gmx.net>:

> Am Dienstag, 19. Oktober 2004 20:58 schrieb Kenneth Culver:
>> Quoting Emanuel Strobl <Emanuel.Strobl_at_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_at_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
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