--On Monday, December 03, 2001 11:10:47 +0100 SXren Schmidt
<[EMAIL PROTECTED]> wrote:
> It seems Miklos Niedermayer wrote:
>> I think they are idle (looking at vmstat -i), but i can't be sure.
>> However i have 2 machines here with VIA 82C596 chipset...
>>
>> atapci0: <VIA 82C596 ATA66 controller> port 0xd800-0xd80f at device 4.1
>> on pci0 ata0: at 0x1f0 irq 14 on atapci0
>> ad0: 28629MB <QUANTUM FIREBALLlct20 30> [58168/16/63] at ata0-master
>> UDMA66
>>
>> 524288 bytes transferred in 0.025247 secs (20766367 bytes/sec)
>>
>> It's idle (the LED isn't blinking after/before dd and vmstat -i doesn't
>> show any ata0 activity).
>>
>> Even my Intel PIIX4 ATA33 controller with the same disk performs better
>> (a little)...
>
> Hmm, yes that looks somewhat on the low side...
> Well, two things, the older VIA chips are not the best performers, but
> I still think it should be better than that, I'll run some tests here,
> I might have messed up something...
> Are we talking -current or -stable here ?
I'm getting even worse performance.
root@lobster# for n in 1 2 3 4 5
do
dd if=/dev/ad0 of=/dev/null bs=512k count=1
done
1+0 records in
1+0 records out
524288 bytes transferred in 0.056385 secs (9298353 bytes/sec)
1+0 records in
1+0 records out
524288 bytes transferred in 0.062027 secs (8452580 bytes/sec)
1+0 records in
1+0 records out
524288 bytes transferred in 0.056339 secs (9305947 bytes/sec)
1+0 records in
1+0 records out
524288 bytes transferred in 0.056325 secs (9308271 bytes/sec)
1+0 records in
1+0 records out
524288 bytes transferred in 0.056482 secs (9282398 bytes/sec)
root@lobster#
atapci0: <Intel ICH2 ATA100 controller> port 0xb800-0xb80f at device 31.1
on pci0
ad0: 58644MB <IBM-DTLA-307060> [119150/16/63] at ata0-master tagged UDMA100
Paul Richards
FreeBSD Services Ltd
http://www.freebsd-services.com
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