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Subject[lkp] [fs/file.c] 8a81252b77: 14.2% will-it-scale.per_thread_ops
Date
FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 8a81252b774b53e628a8a0fe18e2b8fc236d92cc ("fs/file.c: don't acquire files->file_lock in fd_install()")


=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/cpufreq_governor/test:
xps/will-it-scale/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/performance/open1

commit:
1af95de6f0119d5bde02d3a811a9f3a3661e954e
8a81252b774b53e628a8a0fe18e2b8fc236d92cc

1af95de6f0119d5b 8a81252b774b53e628a8a0fe18
---------------- --------------------------
%stddev %change %stddev
\ | \
581483 ± 2% +14.2% 663787 ± 2% will-it-scale.per_thread_ops
689.96 ± 0% -2.7% 671.31 ± 0% will-it-scale.time.system_time
17.86 ± 1% +59.8% 28.55 ± 0% will-it-scale.time.user_time
3521 ± 6% -11.2% 3125 ± 3% slabinfo.kmalloc-192.active_objs
17.86 ± 1% +59.8% 28.55 ± 0% time.user_time
8.75 ± 16% -51.4% 4.25 ± 50% sched_debug.cfs_rq[1]:/.nr_spread_over
5.50 ± 20% +95.5% 10.75 ± 35% sched_debug.cfs_rq[3]:/.nr_spread_over
473.25 ± 23% +45.7% 689.50 ± 25% sched_debug.cfs_rq[7]:/.utilization_load_avg
811992 ± 10% +11.6% 906272 ± 3% sched_debug.cpu#0.avg_idle
80.00 ± 17% +61.6% 129.25 ± 33% sched_debug.cpu#7.cpu_load[0]
1372 ± 19% +50.6% 2066 ± 13% sched_debug.cpu#7.curr->pid
20835 ± 26% +40.7% 29308 ± 18% sched_debug.cpu#7.ttwu_count
2.15 ± 2% +34.2% 2.88 ± 2% perf-profile.cpu-cycles.__alloc_fd.get_unused_fd_flags.do_sys_open.sys_open.system_call_fastpath
1.40 ± 3% -8.7% 1.28 ± 3% perf-profile.cpu-cycles.__slab_alloc.kmem_cache_alloc.get_empty_filp.path_openat.do_filp_open
0.96 ± 4% -8.4% 0.88 ± 2% perf-profile.cpu-cycles.dput.__fput.____fput.task_work_run.do_notify_resume
2.55 ± 4% +42.7% 3.63 ± 2% perf-profile.cpu-cycles.get_unused_fd_flags.do_sys_open.sys_open.system_call_fastpath
3.67 ± 4% -9.1% 3.34 ± 3% perf-profile.cpu-cycles.getname.do_sys_open.sys_open.system_call_fastpath
1.02 ± 7% +16.4% 1.19 ± 5% perf-profile.cpu-cycles.kmem_cache_free.putname.do_sys_open.sys_open.system_call_fastpath
1.45 ± 6% +22.8% 1.78 ± 5% perf-profile.cpu-cycles.path_init.path_openat.do_filp_open.do_sys_open.sys_open
1.19 ± 6% +25.4% 1.49 ± 4% perf-profile.cpu-cycles.putname.do_sys_open.sys_open.system_call_fastpath
1.71 ± 7% -14.0% 1.47 ± 4% perf-profile.cpu-cycles.security_file_free.__fput.____fput.task_work_run.do_notify_resume


xps: Nehalem
Memory: 4G




will-it-scale.time.user_time

35 ++---------------------------------------------------------------------+
O O O O O O O |
30 ++O O O O O O O O O O O |
| O O O O O |
25 ++ |
| .*.*..*.*.*..*.*..*.*..*.*..* |
20 *+*..*.*..*.*. + |
| *..*.*.*..*.*..*.*..*.*..*.*
15 ++ |
| |
10 ++ |
| |
5 ++ |
| |
0 ++---O----O------------------------------------------------------------+


[*] 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
---
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: 64291f7db5bd8150a74ad2036f1037e6a0428df2
model: Nehalem
nr_cpu: 8
memory: 4G
hdd_partitions:
swap_partitions: "/dev/disk/by-id/ata-HDT722516DLA380_VDK91GTE0WMZBR-part2"
rootfs_partition: "/dev/disk/by-id/ata-HDT722516DLA380_VDK91GTE0WMZBR-part1"
netconsole_port: 6666
pxe_user: rli9
category: benchmark
perf-profile:
freq: 800
will-it-scale:
test: open1
queue: cyclic
testbox: xps
tbox_group: xps
kconfig: x86_64-rhel
enqueue_time: 2015-08-31 17:42:37.615577272 +08:00
id: ecb4938deaa81f720b37e838939cced483b783c3
user: rli9
compiler: gcc-4.9
head_commit: 2d11c675e2c328a1763d4fbad7b6684879f8102a
base_commit: 64291f7db5bd8150a74ad2036f1037e6a0428df2
branch: linux-devel/devel-hourly-2015083105
kernel: "/pkg/linux/x86_64-rhel/gcc-4.9/64291f7db5bd8150a74ad2036f1037e6a0428df2/vmlinuz-4.2.0"
rootfs: debian-x86_64-2015-02-07.cgz
result_root: "/result/will-it-scale/performance-open1/xps/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/64291f7db5bd8150a74ad2036f1037e6a0428df2/0"
job_file: "/lkp/scheduled/xps/cyclic_will-it-scale-performance-open1-x86_64-rhel-CYCLIC_BASE-64291f7db5bd8150a74ad2036f1037e6a0428df2-20150831-29509-yewucc-0.yaml"
dequeue_time: 2015-08-31 19:26:04.544308510 +08:00
max_uptime: 1500
initrd: "/osimage/debian/debian-x86_64-2015-02-07.cgz"
bootloader_append:
- root=/dev/ram0
- user=rli9
- job=/lkp/scheduled/xps/cyclic_will-it-scale-performance-open1-x86_64-rhel-CYCLIC_BASE-64291f7db5bd8150a74ad2036f1037e6a0428df2-20150831-29509-yewucc-0.yaml
- ARCH=x86_64
- kconfig=x86_64-rhel
- branch=linux-devel/devel-hourly-2015083105
- commit=64291f7db5bd8150a74ad2036f1037e6a0428df2
- BOOT_IMAGE=/pkg/linux/x86_64-rhel/gcc-4.9/64291f7db5bd8150a74ad2036f1037e6a0428df2/vmlinuz-4.2.0
- max_uptime=1500
- RESULT_ROOT=/result/will-it-scale/performance-open1/xps/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/64291f7db5bd8150a74ad2036f1037e6a0428df2/0
- 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/rli9/lkp-x86_64.cgz"
modules_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/64291f7db5bd8150a74ad2036f1037e6a0428df2/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: 6.89 3.58 1.44 1/148 4720
start_time: '1441020401'
end_time: '1441020705'
version: "/lkp/rli9/.src-20150831-174110"
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/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
./runtest.py open1 32 both 1 4 6 8
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