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

Scott Long scottl at
Thu Dec 15 23:31:27 PST 2005

Joao Barros wrote:
> On 12/14/05, Scott Long <scottl at> 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.


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