On Thu, Aug 07, 2014 at 09:18:52PM -0700, Jason Low wrote: > On Fri, 2014-08-08 at 02:02 +0800, Yuyang Du wrote: > > On Wed, Aug 06, 2014 at 11:21:35AM -0700, Jason Low wrote: > > > I ran these tests with most of the AIM7 workloads to compare its > > > performance between a 3.16 kernel and the kernel with these patches > > > applied. > > > > > > The table below contains the percent difference between the baseline > > > kernel and the kernel with the patches at various user counts. A > > > positive percent means the kernel with the patches performed better, > > > while a negative percent means the baseline performed better. > > > > > > Based on these numbers, for many of the workloads, the change was > > > beneficial in those highly contended, while it had - impact in many > > > of the lightly/moderately contended case (10 to 90 users). > > > > > > ----------------------------------------------------- > > > | 10-90 | 100-1000 | 1100-2000 > > > | users | users | users > > > ----------------------------------------------------- > > > alltests | -3.37% | -10.64% | -2.25% > > > ----------------------------------------------------- > > > all_utime | +0.33% | +3.73% | +3.33% > > > ----------------------------------------------------- > > > compute | -5.97% | +2.34% | +3.22% > > > ----------------------------------------------------- > > > custom | -31.61% | -10.29% | +15.23% > > > ----------------------------------------------------- > > > disk | +24.64% | +28.96% | +21.28% > > > ----------------------------------------------------- > > > fserver | -1.35% | +4.82% | +9.35% > > > ----------------------------------------------------- > > > high_systime | -6.73% | -6.28% | +12.36% > > > ----------------------------------------------------- > > > shared | -28.31% | -19.99% | -7.10% > > > ----------------------------------------------------- > > > short | -44.63% | -37.48% | -33.62% > > > ----------------------------------------------------- > > > > > Thanks, Jason. Sorry for late response. > > > > What about the variation of the tests? The machine you test on? > > Hi Yuyang, > > These tests were also done on an 8 socket machine (80 cores). In terms > of variation between the average throughputs, typically the noise range > is about 2% in many of the workloads. >
Thanks a lot, Jason. So for this particular set of workloads on a big machine, I think the result is mixed and overall "neutral", but I expected the variation probably could be bigger especially for light workloads. Any comment from the maintainers and others? Ping Peter and Ben, I haven't heard from you for the 5th version. Yuyang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
