Subject: Re: slowdown with MI scsi on pmax (ds5000/200)
To: None <firstname.lastname@example.org>
From: Andrey Petrov <email@example.com>
Date: 05/21/2001 13:06:00
On Mon, May 21, 2001 at 12:43:31PM -0700, Andrey Petrov wrote:
> On Mon, May 21, 2001 at 05:30:11PM -0000, firstname.lastname@example.org wrote:
> > Let's see... TQ went in 2000/11/30. I removed a bunch of DELAY()s
> > on 2000/12/20. Those are before the problem began.
> > FAS support went in 2001/03/29. thorpej_scsipi went in 2001/04/25.
> > I suppose the cause is probably one or the other of those.
> > Can you try a pre-thorpej_scsipi kernel and see if it still has
> > the problem?
> I tried 15t+fas and almost current and there are no difference here,
> so it seems that fas changes are the cause. I also noticed significant
> difference between read and write performances,
> dd if=/dev/zero of=/dev/rsd0h bs=64k count=8000
> gave me 135 secs, while
> dd if=/dev/rsd0h of=/dev/null bs=64k count=8000
> 69 secs.
Spoke too soon, I got the same results with solaris as well, so
seems that's my hard drive puts these limits. That's strange anyway.