Vivek Goyal wrote:> 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 about> that -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 you> please 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 very> close to existing CFQ behavior. If not, then we need to dive deeper and> see why variations are happening. Hi Vivek, I re-run the fio test under V6 for normal reads and writes with fairness == 0. It seems the performance gets a little better for normal writes than before. Mode Normal read | Random read | Normal write | Random write 2.6.31-rc1 53,547KiB/s 2,894KiB/s 44,088KiB/s 8,450KiB/s V6(fairness = 0) 53,199KiB/s 2,847KiB/s 41,898KiB/s 8,582KiB/s Performance 0% -1.6% -4.9% +1.5% > > Is it also possible to run the same tests with V7. > > Thanks> Vivek> >> 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%>>>> ============>>>>>>>>>>>>>>>>>>>>>>> > > > > > -- RegardsGui Jianfeng _______________________________________________Containers mailing listContainers@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx://lists.linux-foundation.org/mailman/listinfo/containers
