FYI, we noticed the below changes on https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master commit 6cdb18ad98a49f7e9b95d538a0614cde827404b8 ("mm/vmstat: fix overflow in mod_zone_page_state()") ========================================================================================= compiler/cpufreq_governor/kconfig/rootfs/tbox_group/test/testcase: gcc-4.9/performance/x86_64-rhel/debian-x86_64-2015-02-07.cgz/ivb42/pread1/will-it-scale commit: cc28d6d80f6ab494b10f0e2ec949eacd610f66e3 6cdb18ad98a49f7e9b95d538a0614cde827404b8 cc28d6d80f6ab494 6cdb18ad98a49f7e9b95d538a0 ---------------- -------------------------- %stddev %change %stddev \ | \ 2733943 ± 0% -8.5% 2502129 ± 0% will-it-scale.per_thread_ops 3410 ± 0% -2.0% 3343 ± 0% will-it-scale.time.system_time 340.08 ± 0% +19.7% 406.99 ± 0% will-it-scale.time.user_time 69882822 ± 2% -24.3% 52926191 ± 5% cpuidle.C1-IVT.time 340.08 ± 0% +19.7% 406.99 ± 0% time.user_time 491.25 ± 6% -17.7% 404.25 ± 7% numa-vmstat.node0.nr_alloc_batch 2799 ± 20% -36.6% 1776 ± 0% numa-vmstat.node0.nr_mapped 630.00 ±140% +244.4% 2169 ± 1% numa-vmstat.node1.nr_inactive_anon 6440 ± 11% -15.5% 5440 ± 16% numa-vmstat.node1.nr_slab_reclaimable 11204 ± 20% -36.6% 7106 ± 0% numa-meminfo.node0.Mapped 1017 ±173% +450.3% 5598 ± 15% numa-meminfo.node1.AnonHugePages 2521 ±140% +244.1% 8678 ± 1% numa-meminfo.node1.Inactive(anon) 25762 ± 11% -15.5% 21764 ± 16% numa-meminfo.node1.SReclaimable 70103 ± 9% -9.8% 63218 ± 9% numa-meminfo.node1.Slab 2.29 ± 3% +32.8% 3.04 ± 4% perf-profile.cycles-pp.atime_needs_update.touch_atime.shmem_file_read_iter.__vfs_read.vfs_read 1.10 ± 3% -27.4% 0.80 ± 5% perf-profile.cycles-pp.current_fs_time.atime_needs_update.touch_atime.shmem_file_read_iter.__vfs_read 2.33 ± 2% -13.0% 2.02 ± 3% perf-profile.cycles-pp.fput.entry_SYSCALL_64_fastpath 0.89 ± 2% +29.6% 1.15 ± 7% perf-profile.cycles-pp.fsnotify.vfs_read.sys_pread64.entry_SYSCALL_64_fastpath 2.85 ± 2% +45.4% 4.14 ± 5% perf-profile.cycles-pp.touch_atime.shmem_file_read_iter.__vfs_read.vfs_read.sys_pread64 63939 ± 0% +17.9% 75370 ± 15% sched_debug.cfs_rq:/.exec_clock.25 72.50 ± 73% -63.1% 26.75 ± 19% sched_debug.cfs_rq:/.load_avg.1 34.00 ± 62% -61.8% 13.00 ± 12% sched_debug.cfs_rq:/.load_avg.14 18.00 ± 11% -11.1% 16.00 ± 10% sched_debug.cfs_rq:/.load_avg.20 14.75 ± 41% +122.0% 32.75 ± 26% sched_debug.cfs_rq:/.load_avg.25 278.88 ± 11% +18.8% 331.25 ± 7% sched_debug.cfs_rq:/.load_avg.max 51.89 ± 11% +13.6% 58.97 ± 4% sched_debug.cfs_rq:/.load_avg.stddev 7.25 ± 5% +255.2% 25.75 ± 53% sched_debug.cfs_rq:/.runnable_load_avg.25 28.50 ± 1% +55.3% 44.25 ± 46% sched_debug.cfs_rq:/.runnable_load_avg.7 72.50 ± 73% -63.1% 26.75 ± 19% sched_debug.cfs_rq:/.tg_load_avg_contrib.1 34.00 ± 62% -61.8% 13.00 ± 12% sched_debug.cfs_rq:/.tg_load_avg_contrib.14 18.00 ± 11% -11.1% 16.00 ± 10% sched_debug.cfs_rq:/.tg_load_avg_contrib.20 14.75 ± 41% +122.0% 32.75 ± 25% sched_debug.cfs_rq:/.tg_load_avg_contrib.25 279.29 ± 11% +19.1% 332.67 ± 7% sched_debug.cfs_rq:/.tg_load_avg_contrib.max 52.01 ± 11% +13.8% 59.18 ± 4% sched_debug.cfs_rq:/.tg_load_avg_contrib.stddev 359.50 ± 6% +41.5% 508.75 ± 22% sched_debug.cfs_rq:/.util_avg.25 206.25 ± 16% -13.1% 179.25 ± 11% sched_debug.cfs_rq:/.util_avg.40 688.75 ± 1% +18.5% 816.00 ± 1% sched_debug.cfs_rq:/.util_avg.7 953467 ± 1% -17.9% 782518 ± 10% sched_debug.cpu.avg_idle.5 9177 ± 43% +73.9% 15957 ± 29% sched_debug.cpu.nr_switches.13 7365 ± 19% -35.4% 4755 ± 11% sched_debug.cpu.nr_switches.20 12203 ± 28% -62.2% 4608 ± 9% sched_debug.cpu.nr_switches.22 1868 ± 49% -51.1% 913.50 ± 27% sched_debug.cpu.nr_switches.27 2546 ± 56% -70.0% 763.00 ± 18% sched_debug.cpu.nr_switches.28 3003 ± 78% -77.9% 663.00 ± 18% sched_debug.cpu.nr_switches.33 1820 ± 19% +68.0% 3058 ± 33% sched_debug.cpu.nr_switches.8 -4.00 ±-35% -156.2% 2.25 ± 85% sched_debug.cpu.nr_uninterruptible.11 4.00 ±133% -187.5% -3.50 ±-24% sched_debug.cpu.nr_uninterruptible.17 1.75 ± 74% -214.3% -2.00 ±-127% sched_debug.cpu.nr_uninterruptible.25 0.00 ± 2% +Inf% 4.00 ± 39% sched_debug.cpu.nr_uninterruptible.26 2.50 ± 44% -110.0% -0.25 ±-591% sched_debug.cpu.nr_uninterruptible.27 1.33 ±154% -287.5% -2.50 ±-72% sched_debug.cpu.nr_uninterruptible.32 -1.00 ±-244% -250.0% 1.50 ±251% sched_debug.cpu.nr_uninterruptible.45 3.50 ± 82% -135.7% -1.25 ±-66% sched_debug.cpu.nr_uninterruptible.46 -4.50 ±-40% -133.3% 1.50 ±242% sched_debug.cpu.nr_uninterruptible.6 -3.00 ±-78% -433.3% 10.00 ±150% sched_debug.cpu.nr_uninterruptible.7 10124 ± 39% +65.8% 16783 ± 23% sched_debug.cpu.sched_count.13 12833 ± 23% -54.6% 5823 ± 32% sched_debug.cpu.sched_count.22 1934 ± 48% -49.8% 971.00 ± 26% sched_debug.cpu.sched_count.27 3065 ± 76% -76.2% 728.25 ± 16% sched_debug.cpu.sched_count.33 2098 ± 24% +664.1% 16030 ±126% sched_debug.cpu.sched_count.5 4653 ± 33% +83.4% 8536 ± 25% sched_debug.cpu.sched_goidle.15 5061 ± 41% -61.1% 1968 ± 13% sched_debug.cpu.sched_goidle.22 834.75 ± 57% -60.2% 332.00 ± 35% sched_debug.cpu.sched_goidle.27 719.00 ± 71% -63.3% 264.00 ± 19% sched_debug.cpu.sched_goidle.28 943.25 ±115% -76.3% 223.25 ± 21% sched_debug.cpu.sched_goidle.33 2520 ± 26% +112.4% 5353 ± 19% sched_debug.cpu.ttwu_count.13 5324 ± 22% -49.7% 2679 ± 45% sched_debug.cpu.ttwu_count.22 2926 ± 38% +231.1% 9690 ± 37% sched_debug.cpu.ttwu_count.23 277.25 ± 18% +166.7% 739.50 ± 83% sched_debug.cpu.ttwu_count.27 1247 ± 61% -76.6% 292.25 ± 11% sched_debug.cpu.ttwu_count.28 751.75 ± 22% +183.9% 2134 ± 9% sched_debug.cpu.ttwu_count.3 6405 ± 97% -75.9% 1542 ± 48% sched_debug.cpu.ttwu_count.41 5582 ±104% -76.2% 1327 ± 55% sched_debug.cpu.ttwu_count.43 3201 ± 26% -75.1% 796.75 ± 18% sched_debug.cpu.ttwu_local.22 ivb42: Ivytown Ivy Bridge-EP Memory: 64G 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