Making, drinking tea and reading an opus magnum from Andrew Atrens:
[Charset ISO-8859-1 unsupported, filtering to ASCII...]
> Okay, I've upgraded to a kernel with tag=OPENBSD_3_7 which looks to be
> the -stable or 'patch' tag, and while the situation has improved, performance
> is still off by a factor of 5.
speaking about your ide "benchmarks" ...
you cann seriously oncsider any measurment that too ~1sec
try running it for at least 10 seconds
> (I added the wd test below because with the 3.7 kernel it (interestingly)
> matched
> that of the flash stick. Now with the -stable kernel wd is performing
> better,
> as is the flash stick, but both are still too slow. )
>
> -- [EMAIL PROTECTED]: ~ (17:13) --
> # dd if=/dev/wd0c of=/dev/null bs=819200 count=20
> 20+0 records in
> 20+0 records out
> 16384000 bytes transferred in 1.129 secs (14509606 bytes/sec)
>
> -- [EMAIL PROTECTED]: ~ (17:14) --
> # dd if=/dev/sd0c of=/dev/null bs=819200 count=20
> 20+0 records in
> 20+0 records out
> 16384000 bytes transferred in 6.017 secs (2722767 bytes/sec)
>
> On DragonFly-Stable for comparisons, the flash stick is *fast* -
>
> -- [EMAIL PROTECTED]: /usr/src/sys/compile/AB-MOBILE-FAST_IPSEC (18:11) --
> # dd if=/dev/da0 of=/dev/null bs=819200 count=20
> 20+0 records in
> 20+0 records out
> 16384000 bytes transferred in 1.223731 secs (13388563 bytes/sec)
>
>
> I have 3 identical boxen here (they're Dell GX240's). For fun
> I just bounced onto the third box (FreeBSD 4.9) and tried the ata test -
>
> -- [EMAIL PROTECTED]: /home/atrens (18:24) --
> # dd if=/dev/ad0 of=/dev/null bs=819200 count=20
> 20+0 records in
> 20+0 records out
> 16384000 bytes transferred in 0.336737 secs (48655194 bytes/sec)
>
> I'm not sure what this means, because we're now comparing completely
> different ata subsystems - but the FreeBSD ata subsystem looks to be
> 3x faster than 3.7.
>
> This is the ata disk in question, btw -
> wd0 at pciide0 channel 0 drive 0: <Maxtor 6Y080L0>
> wd0: 16-sector PIO, LBA, 78167MB, 160086528 sectors
> wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
>
> I'm curious what performance other people are getting with this disk... :)
> since both subsystems (scsi/usb and ide) have both linearly improved,
> but, let's be a bit fuzzy and say, are both still off where they should be
> by *roughly* a factor of 4.
>
> Andrew.
>
--
paranoic mickey (my employers have changed but, the name has remained)
