FYI, we noticed the below changes on git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux.git timer/alloc_tvec_statically commit 17cdf560f2727f687ab159707d0aa591f8a2f82d ("timer: Allocate per-cpu tvec_base's statically")
testbox/testcase/testparams: lkp-sbx04/boot/performance-1 c5e77f5216abdd1d 17cdf560f2727f687ab159707d ---------------- -------------------------- %stddev %change %stddev \ | \ 410996 ± 0% +4.0% 427412 ± 0% boot-meminfo.VmallocUsed testbox/testcase/testparams: wsm/boot/performance-1 c5e77f5216abdd1d 17cdf560f2727f687ab159707d ---------------- -------------------------- 85712 ± 0% +2.4% 87772 ± 0% boot-meminfo.VmallocUsed testbox/testcase/testparams: lkp-snb01/boot/performance-1 c5e77f5216abdd1d 17cdf560f2727f687ab159707d ---------------- -------------------------- 447001 ± 0% -1.0% 442558 ± 0% boot-slabinfo.num_objs 125616 ± 5% -13.5% 108720 ± 4% boot-meminfo.DirectMap4k 347196 ± 0% +4.7% 363612 ± 0% boot-meminfo.VmallocUsed lkp-sbx04: Sandy Bridge-EX Memory: 64G wsm: Westmere Memory: 6G lkp-snb01: Sandy Bridge-EP Memory: 32G boot-meminfo.VmallocUsed 90000 O+-O--O--O-O--O--O--O--O--O-O--O--O--O--O--O-O--O--O--O--O--O-O--O--O *..*..*..*.*..*..*..*..* *..*..*..* *..*..*..* | 80000 ++ : : : : | 70000 ++ : : : : | | : : : : | 60000 ++ : : : : | 50000 ++ : : : : | | : : : : | 40000 ++ : : : : | 30000 ++ : : : : | | : : : : | 20000 ++ : : : : | 10000 ++ : : : : | | : : : : | 0 ++------------------------*-*--------------*-*----------------------+ [*] bisect-good sample [O] bisect-bad sample To reproduce: apt-get install ruby git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/setup-local job.yaml # the job file attached in this email bin/run-local 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
--- testcase: boot default-monitors: default-watchdogs: watch-oom: watchdog: cpufreq_governor: performance model: Westmere memory: 6G nr_hdd_partitions: 1 hdd_partitions: swap_partitions: rootfs_partition: netconsole_port: 6667 boot-slabinfo: boot-meminfo: memmap: boot-memory: boot-time: kernel-size: sleep: 1 branch: linux-devel/devel-hourly-2015040111 commit: 4a5cba20d58c8acccab671b13c83165be9cba0fb repeat_to: 1 testbox: wsm tbox_group: wsm kconfig: x86_64-rhel enqueue_time: 2015-04-01 13:38:08.480648100 +08:00 kernel: "/kernel/x86_64-rhel/4a5cba20d58c8acccab671b13c83165be9cba0fb/vmlinuz-4.0.0-rc6-03709-g4a5cba2" user: lkp queue: boot rootfs: debian-x86_64-2015-02-07.cgz result_root: "/result/wsm/boot/performance-1/debian-x86_64-2015-02-07.cgz/x86_64-rhel/4a5cba20d58c8acccab671b13c83165be9cba0fb/0" job_file: "/lkp/scheduled/wsm/boot_boot-performance-1-x86_64-rhel-4a5cba20d58c8acccab671b13c83165be9cba0fb-0-20150401-18244-52f40d.yaml" dequeue_time: 2015-04-01 13:38:26.975590830 +08:00 nr_cpu: "$(nproc)" max_uptime: 3600 modules_initrd: "/kernel/x86_64-rhel/4a5cba20d58c8acccab671b13c83165be9cba0fb/modules.cgz" job_state: finished loadavg: 0.15 0.04 0.02 1/189 631 start_time: '1427866643' end_time: '1427866644' version: "/lkp/lkp/.src-20150331-175520"
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/cpu10/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu11/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 echo performance > /sys/devices/system/cpu/cpu8/cpufreq/scaling_governor echo performance > /sys/devices/system/cpu/cpu9/cpufreq/scaling_governor
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