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Subject[LKP] [timer] 17cdf560f27: +4.0% boot-meminfo.VmallocUsed
From
Date
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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