Date: Fri, 16 Dec 2005 09:13:54 +0100 From: Martin Nilsson <martin@gneto.com> To: Scott Long <scottl@samsco.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/amr amr.c amr_cam.c amr_disk.c amr_pci.c amrio.h amrreg.h amrvar.h Message-ID: <43A27742.2030102@gneto.com> In-Reply-To: <43A26D4A.9080403@samsco.org> References: <200512140326.jBE3QnUT010666@repoman.freebsd.org> <70e8236f0512151455g1231cb7oa74aa7d54cfd5b18@mail.gmail.com> <43A26D4A.9080403@samsco.org>
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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... /Martin
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