Hi Nicolae: Can you please let me know: - what HDDs (rpm etc.) of your system? - which linux kernel are you using? Thanks! On Fri, Apr 2, 2010 at 2:58 AM, Nicolae Mihalache <mache@xxxxxxxxxxxx> wrote: > I see some benchmarks performed at boot time on my Xeon E5410 2.33GHz > that shows > ... > [ 37.935702] raid6: sse2x1 3562 MB/s > [ 38.003702] raid6: sse2x2 6422 MB/s > [ 38.003702] raid6: using algorithm sse2x2 (6422 MB/s) > > This speed is higher that the DDR2 667 theoretical speed of > 5333MBs/sec. So I expect the limiting factor will never be the CPU, so > it would not make sense to use multi-core. > > Am I completely off? > > > nicolae > > > Learner Study wrote: >> Hi Keld: >> >> Do we have raid5/6 numbers for linux on any multi-core CPU? Most of >> the benchmarks I have seen on wiki show raid5 perf to be ~150MB/s with >> single core CPUs. How does that scale with multiple cores? Something >> like intel's jasper forest??? >> >> If available, can u pls point me to numbers with multi-core CPU? >> >> Thanks! >> >> On Wed, Mar 31, 2010 at 1:15 PM, Keld Simonsen <keld@xxxxxxxxxx> wrote: >> >>> On Wed, Mar 31, 2010 at 12:42:57PM -0700, Learner Study wrote: >>> >>>> Hi Linux Raid Experts: >>>> >>>> I was looking at following wiki on raid perf on linux: >>>> >>>> https://raid.wiki.kernel.org/index.php/Performance >>>> >>>> and notice that the performance numbers are with 2.6.12 kernel. >>>> >>>> Do we perf numbers for: >>>> - latest kernel (something like 2.6.27 / 2.6.31) >>>> - raid 5 and 6 >>>> >>>> Can someone please point me to appropriate link? >>>> >>> The link mentioned above has a number of other performance reports, for other levels of the kernel. >>> Anyway you should be able to get comparable results for newer kernels, the kernel has not become >>> slower since 2.6.12 on RAID. >>> >>> best regards >>> Keld >>> >>> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-raid" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
