Re: FreeBSD 5.3b7and poor ata performance

From: Kris Kennaway <kris_at_obsecurity.org>
Date: Thu, 21 Oct 2004 13:42:51 -0700
On Thu, Oct 21, 2004 at 06:50:33PM +0200, fandino wrote:
> Kris Kennaway wrote:
> >>OpenBSD 3.5:
> >>dd if=/mnt/aa of=/dev/null bs=1024k count=1024
> >>1073741824 bytes transferred in 18.743 secs (57287584 bytes/sec)
> >>
> >>FreeBSD 5.3rc1:
> >># dd if=/mnt/aa of=/dev/null bs=1024k count=1024
> >>1073741824 bytes transferred in 42.215597 secs (25434719 bytes/sec)
> 
> >BTW, others have asked that you not use dd as your "benchmark",
> >because it's not benchmarking anything relevant for real-world use of
> >the disk.
> 
> I posted the results of bonnie++ tests two days ago. (fbsd2.txt and obsd.txt
> at the bottom)
> 
> http://lists.freebsd.org/pipermail/freebsd-current/2004-October/040567.html
> 
> also I did copies of large mpeg files (sequential read) which were a
> real pain to process because disks were very slow (as slow as dd tests).
> 
> I will do all tests that you need to demostrate the problem, just tell
> me which test you want to do.
> 
> Now, I'm waiting to S?ren. He is the one who can find a bug like this.

OK, there's been a lot of useless discussion in this thread, so we
should try to keep further instances to a minimum and focus on the
useful data instead.

Kris

Received on Thu Oct 21 2004 - 18:42:42 UTC

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