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Date: Mon, 24 Oct 2016 10:32:19 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Chao Yu <yuchao0@...wei.com>
Cc: Jaegeuk Kim <jaegeuk@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: [lkp] [f2fs] dfd02e4de1: xfstests.generic.027.seconds -98.8%
improvement
FYI, we noticed a -98.8% improvement of xfstests.generic.027.seconds due to commit:
commit dfd02e4de1c5f40c268984254045d388ab0c3e74 ("f2fs: fix to preallocate block only aligned to 4K")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
in testcase: xfstests
on test machine: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3 -smp 4 -m 4G
with following parameters:
disk: 4HDD
fs: f2fs
test: generic-slow2
xfstests is a regression test suite for xfs and other files ystems.
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.
Details are as below:
-------------------------------------------------------------------------------------------------->
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
=========================================================================================
compiler/disk/fs/kconfig/rootfs/tbox_group/test/testcase:
gcc-6/4HDD/f2fs/x86_64-rhel/debian-x86_64-2016-08-31.cgz/vm-kbuild-4G/generic-slow2/xfstests
commit:
6a7a3aedd5 ("f2fs: fix non static symbol warning")
dfd02e4de1 ("f2fs: fix to preallocate block only aligned to 4K")
6a7a3aedd562838f dfd02e4de1c5f40c2689842540
---------------- --------------------------
fail:runs %reproduction fail:runs
| | |
%stddev %change %stddev
\ | \
2854 ± 1% -98.8% 35.00 ± 8% xfstests.generic.027.seconds
3103 ± 1% -90.9% 283.10 ± 1% xfstests.time.elapsed_time
3103 ± 1% -90.9% 283.10 ± 1% xfstests.time.elapsed_time.max
1323384 ± 0% -7.3% 1227062 ± 0% xfstests.time.file_system_inputs
72766 ± 1% -60.9% 28465 ± 6% xfstests.time.involuntary_context_switches
6753170 ± 0% +30.6% 8817851 ± 0% xfstests.time.minor_page_faults
5.00 ± 0% +760.0% 43.00 ± 4% xfstests.time.percent_of_cpu_this_job_got
158.03 ± 1% -40.1% 94.67 ± 5% xfstests.time.system_time
21.85 ± 2% +27.8% 27.92 ± 2% xfstests.time.user_time
226741 ± 0% -47.0% 120221 ± 1% xfstests.time.voluntary_context_switches
xfstests.generic.027.seconds
3000 ++----------------------*-----------------------*--------------------+
*..*.*..*..*.*..*..*.*. * *.*..*. *..* |
2500 ++ : : |
| : : |
| : : |
2000 ++ : : |
| : : |
1500 ++ : : |
| *..*..*.* |
1000 ++ |
| |
| |
500 ++ |
| |
0 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-O--O
xfstests.time.user_time
30 ++---------------------------------------------------------------------+
| |
28 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 O O
| |
26 ++ |
| |
24 ++ |
| *.. |
22 ++ * .*. .. |
| .. : *..*. * *.* *..* |
| .* : .. : .. |
20 *+.*.*..*. * : .* |
| : .*.. .*. |
18 ++----------------------------*-----*----------------------------------+
xfstests.time.percent_of_cpu_this_job_got
50 ++---------------------------------------------------------------------+
| O |
45 O+ O O O O O O O O O O O
40 ++ O O O O O O O O O O O O |
| O O |
35 ++ |
30 ++ |
| |
25 ++ |
20 ++ |
| |
15 ++ |
10 ++ |
| .*..*..*.*.. |
5 *+-*-*--*--*--*-*--*--*--*-*-------------*--*-*--*--*--*---------------+
xfstests.time.minor_page_faults
9.5e+06 ++----------------------------------------------------------------+
| |
9e+06 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 O O |
8.5e+06 ++ |
| |
8e+06 ++ |
| |
7.5e+06 ++ |
| |
7e+06 ++ .*. |
*..*.*..*.*..*.*. *..*.* *..*.*..*.*..* |
6.5e+06 ++ + + |
| + .*.. .* |
6e+06 ++--------------------------*----*--------------------------------+
xfstests.time.voluntary_context_switches
240000 ++-----------------------------------------------------------------+
*.. .*..*.*..*.*..*..*.*..* *.*..*.*..*..* |
220000 ++ * : : |
| : : |
200000 ++ : : |
| : : |
180000 ++ *..*..*.* |
| |
160000 ++ |
| |
140000 ++ |
| |
120000 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 O O
| |
100000 ++-----------------------------------------------------------------+
xfstests.time.involuntary_context_switches
80000 ++------------------------------------------------------------------+
| .*.. .*. .*.. |
70000 *+.*.*..*.*..*..* *. * *..*.*. *.* |
| : : |
| : : |
60000 ++ : : |
| *.*..*..* |
50000 ++ |
| |
40000 ++ |
| |
| O O |
30000 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 |
20000 ++------------------------------------------------------------------+
xfstests.time.file_system_inputs
1.36e+06 ++---------------------------------------------------------------+
| *.*..*.* |
1.34e+06 ++ + + |
| + + |
1.32e+06 *+.*.*..*.*..*.*..*.*..*.* *.*..*.*..*.* |
| |
1.3e+06 ++ |
| |
1.28e+06 ++ |
| |
1.26e+06 ++ |
| |
1.24e+06 ++ |
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 O O
1.22e+06 ++---------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Thanks,
Xiaolong
View attachment "config-4.8.0-rc3-00041-gdfd02e4" of type "text/plain" (152823 bytes)
View attachment "job-script" of type "text/plain" (4363 bytes)
View attachment "job.yaml" of type "text/plain" (3531 bytes)
View attachment "reproduce" of type "text/plain" (611 bytes)
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