FYI, we noticed the below changes on https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master commit b52da86e0ad58f096710977fcda856fd84da9233 ("sched/numa: Fix task_tick_fair() from disabling numa_balancing") ========================================================================================= tbox_group/testcase/rootfs/kconfig/compiler/cpufreq_governor/test: nhm4/will-it-scale/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/performance/readseek1 commit: e2bf1c4b17aff25f07e0d2952d8c1c66643f33fe b52da86e0ad58f096710977fcda856fd84da9233 e2bf1c4b17aff25f b52da86e0ad58f096710977fcd ---------------- -------------------------- %stddev %change %stddev \ | \ 1868374 ± 0% -1.4% 1843108 ± 0% will-it-scale.per_thread_ops 0.57 ± 0% +14.1% 0.65 ± 10% will-it-scale.scalability 14052 ± 0% -29.6% 9896 ± 0% will-it-scale.time.minor_page_faults 161.75 ± 45% -53.2% 75.75 ± 23% cpuidle.C1E-NHM.usage 14052 ± 0% -29.6% 9896 ± 0% time.minor_page_faults 6943 ± 0% -100.0% 0.00 ± -1% proc-vmstat.numa_hint_faults 6943 ± 0% -100.0% 0.00 ± -1% proc-vmstat.numa_hint_faults_local 7780 ± 0% -100.0% 0.00 ± -1% proc-vmstat.numa_pte_updates 1.19 ± 4% -14.1% 1.02 ± 4% perf-profile.cpu-cycles.__fget_light.sys_lseek.entry_SYSCALL_64_fastpath 5.47 ± 1% -11.8% 4.83 ± 2% perf-profile.cpu-cycles.entry_SYSCALL_64 1.17 ± 6% -16.7% 0.98 ± 12% perf-profile.cpu-cycles.fsnotify.vfs_read.sys_read.entry_SYSCALL_64_fastpath 1.70 ± 4% -15.0% 1.45 ± 4% perf-profile.cpu-cycles.shmem_file_llseek.sys_lseek.entry_SYSCALL_64_fastpath 5.39 ± 1% -12.8% 4.70 ± 5% perf-profile.cpu-cycles.sys_lseek.entry_SYSCALL_64_fastpath 116.50 ± 14% -35.4% 75.25 ± 13% sched_debug.cfs_rq[2]:/.load 95126 ± 8% +17.5% 111795 ± 10% sched_debug.cpu#0.nr_load_updates 2464 ± 6% -39.4% 1494 ± 29% sched_debug.cpu#2.curr->pid 116.50 ± 14% -35.4% 75.25 ± 13% sched_debug.cpu#2.load 1243 ± 2% +50.4% 1870 ± 22% sched_debug.cpu#3.curr->pid 17134 ± 29% +7834.3% 1359530 ±110% sched_debug.cpu#4.nr_switches 17204 ± 29% +7802.5% 1359602 ±110% sched_debug.cpu#4.sched_count 4538 ± 78% +12299.8% 562734 ±119% sched_debug.cpu#4.sched_goidle 950401 ± 4% -7.9% 875553 ± 4% sched_debug.cpu#7.avg_idle nhm4: Nehalem Memory: 4G proc-vmstat.numa_pte_updates 8000 ++---------------------------------------------------*---*-*-----*-*-+ | * * *.* * 7000 ++ : | | : | | : | 6000 ++ : | | : | 5000 ++ : | | : | 4000 ++ : | | : | | : | 3000 ++ : | *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*.*.* | 2000 ++-------------------------------------------------------------------+ proc-vmstat.numa_hint_faults 7000 ++-------------------------------------------------*-*-*-*-*-*-*-*-*-* | : | 6000 ++ : | | : | | : | 5000 ++ : | | : | 4000 ++ : | | : | 3000 ++ : | | : | | : | 2000 ++ : | *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*.*.* | 1000 ++-------------------------------------------------------------------+ proc-vmstat.numa_hint_faults_local 7000 ++-------------------------------------------------*-*-*-*-*-*-*-*-*-* | : | 6000 ++ : | | : | | : | 5000 ++ : | | : | 4000 ++ : | | : | 3000 ++ : | | : | | : | 2000 ++ : | *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*..*.*.*.*.*.*.*.* | 1000 ++-------------------------------------------------------------------+ [*] bisect-good sample [O] bisect-bad sample To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Ying Huang