* Antoine Martin <[EMAIL PROTECTED]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > These are pure cpu scheduling tests, not doing any I/O this time. All > these tests are still "pathological" in the sense that they are only > meant to show differences between schedulers rather than try to > simulate real usage scenarios.
thanks for testing this! > all the graphs are here: > http://devloop.org.uk/lkml/ wow - really nice graphs! > Legend: > * 2.6.23-rc6-yield2: "yield2" patch is this one: > http://lkml.org/lkml/2007/9/14/157 > * 2.6.23-rc6-yield2-highlatency is the same patch, but the kernel is > built without preempt, with HZ100 and the scheduling granularity is > doubled using sysctl. > * 2.6.23-rc6-yield3 is CFS-v21 combo3 + the yield patch > * 2.6.23-rc6-yield4 is this patch (queued for mainline? and in mm?): > http://lkml.org/lkml/2007/9/19/409 wrt. yield4 did you set /proc/sys/kernel/sched_compat_yield to 1? (with sched_compat_yield at 0, which is the default, nothing changes) which one would be your favorite kernel? To me yield4 looks pretty good. > of interest I found: > * rc6-mm1 is not always fair (see "ManyThreadsYieldOften" tests) - the > only one to have almost half the threads already finished at the half > way point when yielding often. Also slower for the "RandomSleep". > * increasing latency makes a noticeable difference (see "ShortPause") > it can be more fair, but it also makes it a lot more erratic (see > "Yield" tests) > * most changes are only noticeable with a large number for threads (look > for 'ManyThreads' in the filename) i'm wondering, how easy would it be for you to test the sched-devel.git tree? If you havent used git before then first install the 'git' package, then do: git-clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git linux-2.6.git cd linux-2.6.git git-pull git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel.git > PS: now testing -rc8, also added a test that consumes memory in each > thread. also now recording context switches and idle time. ok. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/