On Mon, Aug 09, 2010 at 04:45:45PM +0200, Freek Dijkstra wrote: > Hi all, > > Thanks a lot for the great feedback from before the weekend. Since one > of my colleagues needed the machine, I could only do the tests today. > > In short: just installing 2.6.35 did make some difference, but I was > mostly impressed with the speedup gained by the hardware acceleration of > the crc32c_intel module. > > Here is some quick data. > > Reference figures: > 16* single disk (theoretical limit): 4092 MiByte/s > fio data layer tests (achievable limit): 3250 MiByte/s > ZFS performance: 2505 MiByte/s > > BtrFS figures: > IOzone on 2.6.32: 919 MiByte/s > fio btrfs tests on 2.6.35: 1460 MiByte/s
Was this one with O_DIRECT? > IOzone on 2.6.35 with crc32c: 1250 MiByte/s > IOzone on 2.6.35 with crc32c_intel: 1629 MiByte/s > IOzone on 2.6.35, using -o nodatasum: 1955 MiByte/s > > For those finding this message and want a howto: the easiest way to use > crc32c_intel is to add the module name to /etc/modules: > # echo "crc32c_intel" >> /etc/modules > # reboot > > Now the next step for us is to tune the block sizes. We only did that > preliminary, but now that we have a good knowledge of what software to > use, we can start tuning that in more detail. > > If there is interest on this list, I'll gladly post our results here. Definitely, please do. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
