[lkp] [mm] 6f25a14a70: will-it-scale.scalability -4.0% regression

[kernel test robot]

FYI, we noticed that will-it-scale.scalability -4.0% regression on

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 6f25a14a7053b69917e2ebea0d31dd444cd31fd5 ("mm: fix invalid node in alloc_migrate_target()")


=========================================================================================
compiler/cpufreq_governor/kconfig/rootfs/tbox_group/test/testcase:
  gcc-4.9/performance/x86_64-rhel/debian-x86_64-2015-02-07.cgz/lkp-ivb-d03/pthread_mutex1/will-it-scale

commit: 
  969e8d7e47f93ef693028667480558de8f70523f
  6f25a14a7053b69917e2ebea0d31dd444cd31fd5

969e8d7e47f93ef6 6f25a14a7053b69917e2ebea0d 
---------------- -------------------------- 
       fail:runs  %reproduction    fail:runs
         %stddev     %change         %stddev
             \          |                \  
 2.032e+08 ±  0%      -1.6%      2e+08 ±  0%  will-it-scale.per_process_ops
      0.83 ±  0%      -4.0%       0.79 ±  0%  will-it-scale.scalability
    214103 ± 14%     -20.2%     170884 ± 14%  sched_debug.cpu.ttwu_count.stddev
      3789 ±  7%     -10.3%       3398 ±  6%  slabinfo.anon_vma_chain.active_objs
      4660 ±  5%      +7.7%       5019 ±  2%  vmstat.system.in


lkp-ivb-d03: Ivy Bridge
Memory: 4G



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,
Xiaolong Ye
---
LKP_SERVER: inn
LKP_CGI_PORT: 80
LKP_CIFS_PORT: 139
testcase: will-it-scale
default-monitors:
  wait: activate-monitor
  kmsg: 
  uptime: 
  iostat: 
  heartbeat: 
  vmstat: 
  numa-numastat: 
  numa-vmstat: 
  numa-meminfo: 
  proc-vmstat: 
  proc-stat:
    interval: 10
  meminfo: 
  slabinfo: 
  interrupts: 
  lock_stat: 
  latency_stats: 
  softirqs: 
  bdi_dev_mapping: 
  diskstats: 
  nfsstat: 
  cpuidle: 
  cpufreq-stats: 
  turbostat: 
  pmeter: 
  sched_debug:
    interval: 60
cpufreq_governor: performance
default-watchdogs:
  oom-killer: 
  watchdog: 
commit: 6f25a14a7053b69917e2ebea0d31dd444cd31fd5
model: Ivy Bridge
nr_cpu: 4
memory: 4G
nr_hdd_partitions: 0
hdd_partitions: 
netconsole_port: 6674
category: benchmark
perf-profile:
  freq: 800
will-it-scale:
  test: pthread_mutex1
queue: bisect
testbox: lkp-ivb-d03
tbox_group: lkp-ivb-d03
kconfig: x86_64-rhel
enqueue_time: 2016-04-05 08:13:46.122054989 +08:00
compiler: gcc-4.9
rootfs: debian-x86_64-2015-02-07.cgz
id: 4d65b9ec0610d8e0e7fe68094c43e3fb8d15f831
user: lkp
head_commit: c41dbbf6f591a0269b815b2eb5f2a15aae948e52
base_commit: 9735a22799b9214d17d3c231fe377fc852f042e9
branch: internal-eywa/master
result_root: "/result/will-it-scale/performance-pthread_mutex1/lkp-ivb-d03/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/6f25a14a7053b69917e2ebea0d31dd444cd31fd5/0"
job_file: "/lkp/scheduled/lkp-ivb-d03/bisect_will-it-scale-performance-pthread_mutex1-debian-x86_64-2015-02-07.cgz-x86_64-rhel-6f25a14a7053b69917e2ebea0d31dd444cd31fd5-20160405-76887-1te91eg-0.yaml"
max_uptime: 1500
initrd: "/osimage/debian/debian-x86_64-2015-02-07.cgz"
bootloader_append:
- root=/dev/ram0
- user=lkp
- job=/lkp/scheduled/lkp-ivb-d03/bisect_will-it-scale-performance-pthread_mutex1-debian-x86_64-2015-02-07.cgz-x86_64-rhel-6f25a14a7053b69917e2ebea0d31dd444cd31fd5-20160405-76887-1te91eg-0.yaml
- ARCH=x86_64
- kconfig=x86_64-rhel
- branch=internal-eywa/master
- commit=6f25a14a7053b69917e2ebea0d31dd444cd31fd5
- BOOT_IMAGE=/pkg/linux/x86_64-rhel/gcc-4.9/6f25a14a7053b69917e2ebea0d31dd444cd31fd5/vmlinuz-4.6.0-rc1-00068-g6f25a14
- max_uptime=1500
- RESULT_ROOT=/result/will-it-scale/performance-pthread_mutex1/lkp-ivb-d03/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/6f25a14a7053b69917e2ebea0d31dd444cd31fd5/0
- LKP_SERVER=inn
- |2-


  earlyprintk=ttyS0,115200 systemd.log_level=err
  debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100
  panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0
  console=ttyS0,115200 console=tty0 vga=normal

  rw
lkp_initrd: "/lkp/lkp/lkp-x86_64.cgz"
modules_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/6f25a14a7053b69917e2ebea0d31dd444cd31fd5/modules.cgz"
bm_initrd: "/osimage/deps/debian-x86_64-2015-02-07.cgz/lkp.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/run-ipconfig.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/turbostat.cgz,/lkp/benchmarks/turbostat.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/will-it-scale.cgz,/lkp/benchmarks/will-it-scale.cgz,/lkp/benchmarks/will-it-scale-x86_64.cgz"
linux_headers_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/6f25a14a7053b69917e2ebea0d31dd444cd31fd5/linux-headers.cgz"
repeat_to: 2
kernel: "/pkg/linux/x86_64-rhel/gcc-4.9/6f25a14a7053b69917e2ebea0d31dd444cd31fd5/vmlinuz-4.6.0-rc1-00068-g6f25a14"
dequeue_time: 2016-04-05 08:15:41.011882855 +08:00
job_state: finished
loadavg: 3.03 1.65 0.68 1/115 4702
start_time: '1459815369'
end_time: '1459815673'
version: "/lkp/lkp/.src-20160401-231508"
2016-04-05 08:16:08 echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
2016-04-05 08:16:08 echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
2016-04-05 08:16:08 echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
2016-04-05 08:16:08 echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
2016-04-05 08:16:09 ./runtest.py pthread_mutex1 32 both 1 2 3 4