If it will help any developers I can provide kernel profiling info and
log messages from a machine with this problem using a kernel with
CISS_DEBUG and profiling support. The machine is just for testing
right now, so I can test patches, provide ILO access, etc if it will
> >Number: 4595
> >Category: system
> >Synopsis: slow performance and high cpu load
> >Confidential: yes
> >Severity: serious
> >Priority: medium
> >Responsible: bugs
> >State: open
> >Class: sw-bug
> >Submitter-Id: net
> >Arrival-Date: Thu Nov 03 02:20:01 GMT 2005
> >Originator: Jason Houx
> >Release: 3.8
> System : OpenBSD 3.8
> Architecture: OpenBSD.i386
> Machine : i386
> Noticed the performance of my ciss raid controller
> src/sys/dev/pci/ciss_pci.c was very slow and caused the
> cpu load to jump. I turned on soft updates and that didn't help.
> I then formated and installed using raid0. Untaring ports.tar.gz
> takes a few minutes minutes on Xeon 3Ghz with 1G of Ram.
> Not running MP Kern.
> Any file transfer with this driver
> I wish I understood how to fix it - I'm still reading on debuging it.
> So far I would think I would look at turning on SCSIDEGUG in the Kern
> and SCIOCDEBUG ioctl to start.
> I'm going to install a current box on one of the three duplicate
> servers I have. If anyone wants to talk back at me feel free.