Date: Fri, 16 Dec 2005 01:09:57 -0700 From: Scott Long <scottl@samsco.org> To: Brian Fundakowski Feldman <green@FreeBSD.org> Cc: cvs-src@FreeBSD.org, Joao Barros <joao.barros@gmail.com>, 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: <43A27655.80706@samsco.org> In-Reply-To: <20051216080702.GD1820@green.homeunix.org> References: <200512140326.jBE3QnUT010666@repoman.freebsd.org> <70e8236f0512151455g1231cb7oa74aa7d54cfd5b18@mail.gmail.com> <43A26D4A.9080403@samsco.org> <20051216080702.GD1820@green.homeunix.org>
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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 <scottl@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. > 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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