On Mon, Jul 27, 2009 at 10:10:34AM +0800, Gui Jianfeng wrote:> Hi，> > Here are some fio test results for IO Controller V6 built and not built.> Iozone test results are also attached.> Hi Gui, Thanks a lot for some performance numbers. It seems to be a mixed chart.Performance gains at some places and loss at others. I am curious aboutthat -7.0% for normal writes. Not sure what can contribute to that. What was the value of "fairness" parameter when you ran those tests? Can youplease set fairness = 0 and re-run the tests (if you have already not done so). By default fairness is set to 1 in V6. With fairness = 0, we should be veryclose to existing CFQ behavior. If not, then we need to dive deeper andsee why variations are happening. Is it also possible to run the same tests with V7. ThanksVivek > Arch: X86> Mem: 1G> Disk: 320G> IO Scheduler: CFQ> > ============> By normal read and write syscall.> > Block Size:32K> File Size: 1G * 10> > Mode Normal read | Random read | Normal write | Random write | Direct read | Direct write> > 2.6.31-rc1 47,932KiB/s 3,566KiB/s 45,693KiB/s 8,501KiB/s 50,088KiB/s 43,473KiB/s> > 2.6.31-rc1-Vivek-V6 47,231KiB/s 3,411KiB/s 42,451KiB/s 8,714KiB/s 51,284KiB/s 42,341KiB/s> > Performance -1.5% -4.4% -7.0% +2.5% +2.4% -2.6%> > ============> > By mmap.> > Block Size:32K> File Size: 500M> > Mode Normal read | Random read | Normal write | Random write> > 2.6.31-rc1 49,951KiB/s 3,245KiB/s 21,950KiB/s 2,771KiB/s> > 2.6.31-rc1-Vivek-V6 49,951KiB/s 3,154KiB/s 22,593KiB/s 2,648KiB/s> > Performance 0% -2.8% +2.9% -4.4%> > ============> > By libaio calls> > Block Size:32K> File Size: 500M> > Mode Normal read | Random read | Normal write | Random write> > 2.6.31-rc1 49,447KiB/s 3,296KiB/s 57,519KiB/s 21,093KiB/s> > 2.6.31-rc1-Vivek-V6 50,142KiB/s 3,238KiB/s 57,791KiB/s 21,283KiB/s> > Performance +1.4% -1.8% 0% +0.1%> > ============> > > > > > > > > > > _______________________________________________Containers mailing listContainers@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx://lists.linux-foundation.org/mailman/listinfo/containers
