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 tested with default fairness value, i'll re-test it when fairness is set to 0. > > Is it also possible to run the same tests with V7. Sure. -- Regards Gui Jianfeng -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
