cvs commit: src/sys/dev/amr amr.c amr_cam.c amr_disk.c amr_pci.c amrio.h amrreg.h amrvar.h

[Brian Fundakowski Feldman]

On Fri, Dec 16, 2005 at 12:31:22AM -0700, Scott Long wrote:
> Joao Barros wrote:
> >On 12/14/05, Scott Long <scottl at freebsd.org> wrote:
> >
> >>scottl      2005-12-14 03:26:49 UTC
> >>
> >> FreeBSD src repository
> >>
> >> Modified files:
> >>   sys/dev/amr          amr.c amr_cam.c amr_disk.c amr_pci.c
> >>                        amrio.h amrreg.h amrvar.h
> >> Log:
> >> Mega update to the LSI MegaRAID driver:
> >>
> >> Items 3 and 4 significantly increase the performance of the driver.  On 
> >> an
> >> LSI 320-2X card, transactions per second went from 13,000 to 31,000 in my
> >> testing with these changes.  However, these changes are still fairly
> >> experimental and shouldn't be merged to 6.x until there is more testing.
> >
> >
> >A 238% improvement is at the very least impressive!
> 
> Yeah, I was shocked at first too.  The PCIe controllers can likely do
> even better than that, but my only PCIe test system had other hardware
> related instabilities, so I didn't do much testing with it.
> 
> >Any specific testing in mind or just stability?
> >
> 
> I'm a bit worried that old controllers (especially ones that predate the
> move to i960 CPUs) might be broken with this.  But yeah, stability
> testing is always welcome.  It got beat up for about 2 weeks straight,
> so I'm pretty confident that it's solid.

Can you define "beat up" in any detail?  Since I've been messing with
the GEOM RAID-3 driver recently, I've been looking for various stress
tests to gain confidence in changes I've made locally.  Best I've had
going so far is some churn-and-burn on several PostgreSQL databases.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green at FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\