[lkp] [x86/build] b2c51106c75: -18.1% will-it-scale.per_process_ops

[kernel test robot]

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/asm
commit b2c51106c7581866c37ffc77c5d739f3d4b7cbc9 ("x86/build: Fix detection of GCC -mpreferred-stack-boundary support")


=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/cpufreq_governor/test:
  wsm/will-it-scale/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/performance/readseek2

commit: 
  f2a50f8b7da45ff2de93a71393e715a2ab9f3b68
  b2c51106c7581866c37ffc77c5d739f3d4b7cbc9

f2a50f8b7da45ff2 b2c51106c7581866c37ffc77c5 
---------------- -------------------------- 
         %stddev     %change         %stddev
             \          |                \  
    879002 ±  0%     -18.1%     720270 ±  7%  will-it-scale.per_process_ops
      0.02 ±  0%     +34.5%       0.02 ±  7%  will-it-scale.scalability
  26153173 ±  0%      +7.0%   27977076 ±  0%  will-it-scale.time.voluntary_context_switches
     15.70 ±  2%     +14.5%      17.98 ±  0%  time.user_time
    370683 ±  0%      +6.2%     393491 ±  0%  vmstat.system.cs
    830343 ± 56%     -54.0%     382128 ± 39%  cpuidle.C1E-NHM.time
    788.25 ± 14%     -21.7%     617.25 ± 16%  cpuidle.C1E-NHM.usage
      3947 ±  2%     +10.6%       4363 ±  3%  slabinfo.kmalloc-192.active_objs
      3947 ±  2%     +10.6%       4363 ±  3%  slabinfo.kmalloc-192.num_objs
   1082762 ±162%    -100.0%       0.00 ± -1%  latency_stats.avg.nfs_wait_on_request.nfs_updatepage.nfs_write_end.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
   1082762 ±162%    -100.0%       0.00 ± -1%  latency_stats.max.nfs_wait_on_request.nfs_updatepage.nfs_write_end.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
   1082762 ±162%    -100.0%       0.00 ± -1%  latency_stats.sum.nfs_wait_on_request.nfs_updatepage.nfs_write_end.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
      2.58 ±  8%     +19.5%       3.09 ±  3%  perf-profile.cpu-cycles._raw_spin_lock_irqsave.finish_wait.__wait_on_bit_lock.__lock_page.find_lock_entry
      7.02 ±  3%      +9.2%       7.67 ±  2%  perf-profile.cpu-cycles._raw_spin_lock_irqsave.prepare_to_wait_exclusive.__wait_on_bit_lock.__lock_page.find_lock_entry
      3.07 ±  2%     +14.8%       3.53 ±  3%  perf-profile.cpu-cycles.finish_wait.__wait_on_bit_lock.__lock_page.find_lock_entry.shmem_getpage_gfp
      3.05 ±  5%      -8.4%       2.79 ±  4%  perf-profile.cpu-cycles.hrtimer_start_range_ns.tick_nohz_stop_sched_tick.__tick_nohz_idle_enter.tick_nohz_idle_enter.cpu_startup_entry
      0.98 ±  3%     -25.1%       0.74 ±  7%  perf-profile.cpu-cycles.is_ftrace_trampoline.print_context_stack.dump_trace.save_stack_trace_tsk.__account_scheduler_latency
      1.82 ± 18%     +46.6%       2.67 ±  3%  perf-profile.cpu-cycles.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.finish_wait.__wait_on_bit_lock.__lock_page
      8.05 ±  3%      +9.5%       8.82 ±  3%  perf-profile.cpu-cycles.prepare_to_wait_exclusive.__wait_on_bit_lock.__lock_page.find_lock_entry.shmem_getpage_gfp
      7.75 ± 34%     -64.5%       2.75 ± 64%  sched_debug.cfs_rq[2]:/.nr_spread_over
      1135 ± 20%     -43.6%     640.75 ± 49%  sched_debug.cfs_rq[3]:/.blocked_load_avg
      1215 ± 21%     -43.1%     691.50 ± 46%  sched_debug.cfs_rq[3]:/.tg_load_contrib
     38.50 ± 21%    +129.9%      88.50 ± 36%  sched_debug.cfs_rq[4]:/.load
     26.00 ± 20%     +98.1%      51.50 ± 46%  sched_debug.cfs_rq[4]:/.runnable_load_avg
    128.25 ± 18%    +227.5%     420.00 ± 43%  sched_debug.cfs_rq[4]:/.utilization_load_avg
      1015 ± 78%    +101.1%       2042 ± 25%  sched_debug.cfs_rq[6]:/.blocked_load_avg
      1069 ± 72%    +100.2%       2140 ± 23%  sched_debug.cfs_rq[6]:/.tg_load_contrib
     88.75 ± 14%     -47.3%      46.75 ± 36%  sched_debug.cfs_rq[9]:/.load
     59.25 ± 23%     -41.4%      34.75 ± 34%  sched_debug.cfs_rq[9]:/.runnable_load_avg
    315.50 ± 45%     -64.6%     111.67 ±  1%  sched_debug.cfs_rq[9]:/.utilization_load_avg
   2246758 ±  7%     +87.6%    4213925 ± 65%  sched_debug.cpu#0.nr_switches
   2249376 ±  7%     +87.4%    4215969 ± 65%  sched_debug.cpu#0.sched_count
   1121438 ±  7%     +81.0%    2030313 ± 61%  sched_debug.cpu#0.sched_goidle
   1151160 ±  7%     +86.5%    2146608 ± 64%  sched_debug.cpu#0.ttwu_count
     33.75 ± 15%     -22.2%      26.25 ±  6%  sched_debug.cpu#1.cpu_load[3]
     33.25 ± 10%     -18.0%      27.25 ±  7%  sched_debug.cpu#1.cpu_load[4]
     40.00 ± 18%     +24.4%      49.75 ± 18%  sched_debug.cpu#10.cpu_load[2]
     39.25 ± 14%     +22.3%      48.00 ± 10%  sched_debug.cpu#10.cpu_load[3]
     39.50 ± 15%     +20.3%      47.50 ±  6%  sched_debug.cpu#10.cpu_load[4]
   5269004 ±  1%     +27.8%    6731790 ± 30%  sched_debug.cpu#10.nr_switches
   5273193 ±  1%     +27.8%    6736526 ± 30%  sched_debug.cpu#10.sched_count
   2633974 ±  1%     +27.8%    3365271 ± 30%  sched_debug.cpu#10.sched_goidle
   2644149 ±  1%     +26.9%    3356318 ± 30%  sched_debug.cpu#10.ttwu_count
     30.75 ± 15%     +66.7%      51.25 ± 31%  sched_debug.cpu#11.cpu_load[1]
   5116609 ±  4%     +34.5%    6884238 ± 33%  sched_debug.cpu#9.nr_switches
   5120531 ±  4%     +34.5%    6889156 ± 33%  sched_debug.cpu#9.sched_count
   2557822 ±  4%     +34.5%    3441428 ± 33%  sched_debug.cpu#9.sched_goidle
      0.00 ±141%  +4.2e+05%       4.76 ±173%  sched_debug.rt_rq[10]:/.rt_time


wsm: Westmere
Memory: 6G

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
---
LKP_SERVER: inn
LKP_CGI_PORT: 80
LKP_CIFS_PORT: 139
testcase: will-it-scale
default-monitors:
  wait: activate-monitor
  kmsg: 
  uptime: 
  iostat: 
  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: 11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b
model: Westmere
memory: 6G
nr_hdd_partitions: 1
hdd_partitions: ata-ATAPI_iHES208_2_3782208017_250915404
swap_partitions: 
rootfs_partition: 
netconsole_port: 6667
category: benchmark
perf-profile:
  freq: 800
will-it-scale:
  test: readseek2
queue: cyclic
testbox: wsm
tbox_group: wsm
kconfig: x86_64-rhel
enqueue_time: 2015-07-28 04:08:48.371752899 +08:00
user: lkp
compiler: gcc-4.9
head_commit: 11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b
base_commit: cbfe8fa6cd672011c755c3cd85c9ffd4e2d10a6f
branch: linux-devel/devel-hourly-2015072818
kernel: "/pkg/linux/x86_64-rhel/gcc-4.9/11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b/vmlinuz-4.2.0-rc4-02469-g11b9de4"
rootfs: debian-x86_64-2015-02-07.cgz
result_root: "/result/will-it-scale/performance-readseek2/wsm/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b/0"
job_file: "/lkp/scheduled/wsm/cyclic_will-it-scale-performance-readseek2-x86_64-rhel-CYCLIC_HEAD-11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b-20150728-22560-192715z-0.yaml"
dequeue_time: 2015-07-29 00:56:27.676781673 +08:00
nr_cpu: "$(nproc)"
max_uptime: 1500
initrd: "/osimage/debian/debian-x86_64-2015-02-07.cgz"
bootloader_append:
- root=/dev/ram0
- user=lkp
- job=/lkp/scheduled/wsm/cyclic_will-it-scale-performance-readseek2-x86_64-rhel-CYCLIC_HEAD-11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b-20150728-22560-192715z-0.yaml
- ARCH=x86_64
- kconfig=x86_64-rhel
- branch=linux-devel/devel-hourly-2015072818
- commit=11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b
- BOOT_IMAGE=/pkg/linux/x86_64-rhel/gcc-4.9/11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b/vmlinuz-4.2.0-rc4-02469-g11b9de4
- max_uptime=1500
- RESULT_ROOT=/result/will-it-scale/performance-readseek2/wsm/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b/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-4.9/11b9de4b33595f8168c4a8fa2bff3ca4c9b38c7b/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,/lkp/benchmarks/will-it-scale.cgz"
job_state: finished
loadavg: 9.93 5.11 2.06 1/186 4844
start_time: '1438102760'
end_time: '1438103064'
version: "/lkp/lkp/.src-20150728-100132"
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
./runtest.py readseek2 32 both 1 6 9 12