Brian Fundakowski Feldman wrote:
On Fri, Dec 16, 2005 at 12:31:22AM -0700, Scott Long wrote:
Joao Barros wrote:
On 12/14/05, Scott Long <[EMAIL PROTECTED]> 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.
Kris Kenneway spent a couple of weeks doing parallel tarball extractions
to an AMR array under 6.0+mega_amr.diff in order to characterize SMP
contention and thoroughput.
Scott
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