cvs commit: src/sys/dev/amr amr.c amr_cam.c amr_disk.c amr_pci.c
amrio.h amrreg.h amrvar.h
martin at gneto.com
Fri Dec 16 00:14:13 PST 2005
Scott Long wrote:
>>> 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
>> 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.
How did you test the transaction rate? I Have a 320-2e and 7*10K disks
in RAID5 running 6.0/amd64 at present. I could boot from a SATA disk
with current and see if I get any improvement. As it is now i can
read/write sequential to the array with about 200MB/s (with 256MB write
back cache on the card) but on real world random transactions I'm
limited by the seven 10K disks.
> I'm a bit worried that old controllers (especially ones that predate the
> move to i960 CPUs) might be broken with this.
You mean the old cards with i960 CPUs? The adapters before the Elite
1600 that uses the old disk model? Sorry I don't have any of those left
anymore but you can always get them on ebay for $20 or so if anyone
still cares about them...
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