Hi Andy, FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/vdso commit cfda7bb9ecbf9d96264bb5bade33a842966d1062 ("x86, vdso: Move syscall and sysenter setup into kernel/cpu/common.c") test case: nhm4/will-it-scale/sched_yield 3d7ee969bffcc98 cfda7bb9ecbf9d96264bb5bad --------------- ------------------------- 5497021 ~ 0% +14.7% 6303424 ~ 0% TOTAL will-it-scale.per_thread_ops 0.54 ~ 0% +5.6% 0.57 ~ 0% TOTAL will-it-scale.scalability 6209483 ~ 0% +1.6% 6305917 ~ 0% TOTAL will-it-scale.per_process_ops 2455 ~ 5% +16.9% 2870 ~ 5% TOTAL cpuidle.C1-NHM.usage 8829 ~ 7% +15.2% 10169 ~10% TOTAL slabinfo.kmalloc-64.active_objs 24.13 ~12% +48.9% 35.93 ~14% TOTAL time.user_time 393 ~ 0% -3.0% 382 ~ 1% TOTAL time.system_time Legend: ~XX% - stddev percent [+-]XX% - change percent Thanks, Jet
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu6/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu7/cpufreq/scaling_governor ./runtest.py sched_yield 32 1 4 6 8