On 01/28/2013 01:17 PM, Mike Galbraith wrote: > On Sun, 2013-01-27 at 16:51 +0100, Mike Galbraith wrote: >> On Sun, 2013-01-27 at 21:25 +0800, Alex Shi wrote: >>> On 01/27/2013 06:35 PM, Borislav Petkov wrote: >>>> On Sun, Jan 27, 2013 at 05:36:25AM +0100, Mike Galbraith wrote: >>>>> With aim7 compute on 4 node 40 core box, I see stable throughput >>>>> improvement at tasks = nr_cores and below w. balance and powersaving. >> ... >>>> Ok, this is sick. How is balance and powersaving better than perf? Both >>>> have much more jobs per minute than perf; is that because we do pack >>>> much more tasks per cpu with balance and powersaving? >>> >>> Maybe it is due to the lazy balancing on balance/powersaving. You can >>> check the CS times in /proc/pid/status. >> >> Well, it's not wakeup path, limiting entry frequency per waker did zip >> squat nada to any policy throughput. > > monteverdi:/abuild/mike/:[0]# echo powersaving > > /sys/devices/system/cpu/sched_policy/current_sched_policy > monteverdi:/abuild/mike/:[0]# massive_intr 10 60 > 043321 00058616 > 043313 00058616 > 043318 00058968 > 043317 00058968 > 043316 00059184 > 043319 00059192 > 043320 00059048 > 043314 00059048 > 043312 00058176 > 043315 00058184 > monteverdi:/abuild/mike/:[0]# echo balance > > /sys/devices/system/cpu/sched_policy/current_sched_policy > monteverdi:/abuild/mike/:[0]# massive_intr 10 60 > 043337 00053448 > 043333 00053456 > 043338 00052992 > 043331 00053448 > 043332 00053488 > 043335 00053496 > 043334 00053480 > 043329 00053288 > 043336 00053464 > 043330 00053496 > monteverdi:/abuild/mike/:[0]# echo performance > > /sys/devices/system/cpu/sched_policy/current_sched_policy > monteverdi:/abuild/mike/:[0]# massive_intr 10 60 > 043348 00052488 > 043344 00052488 > 043349 00052744 > 043343 00052504 > 043347 00052504 > 043352 00052888 > 043345 00052504 > 043351 00052496 > 043346 00052496 > 043350 00052304 > monteverdi:/abuild/mike/:[0]#
similar with aim7 results. Thanks, Mike! Wold you like to collect vmstat info in background? > > Zzzt. Wish I could turn turbo thingy off. Do you mean the turbo mode of cpu frequency? I remember some of machine can disable it in BIOS. > > -Mike > -- Thanks Alex -- 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/