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Date: Mon, 5 Jun 2017 10:32:28 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Jan Kara <jack@...e.cz>
Cc: Theodore Ts'o <tytso@....edu>, LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [lkp-robot] [ext4] 4f8caa60a5: fio.write_bw_MBps 11% improvement
Greeting,
FYI, we noticed a 11% improvement of fio.write_bw_MBps due to commit:
commit: 4f8caa60a5a13a78f26198618f21774bd6aa6498 ("ext4: fix data corruption with EXT4_GET_BLOCKS_ZERO")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: fio-basic
on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G memory
with following parameters:
runtime: 300s
disk: 1SSD
fs: ext4
nr_task: 64
rw: randwrite
bs: 4k
ioengine: sync
test_size: 400g
cpufreq_governor: performance
test-description: Fio is a tool that will spawn a number of threads or processes doing a particular type of I/O action as specified by the user.
test-url: https://github.com/axboe/fio
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/01org/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
testcase/path_params/tbox_group/run: fio-basic/300s-1SSD-ext4-64-randwrite-4k-sync-400g-performance/lkp-bdw-de1
b8cb5a545c3dd8b9 4f8caa60a5a13a78f26198618f
---------------- --------------------------
%stddev change %stddev
\ | \
80.87 11% 89.62 fio.write_bw_MBps
0.05 135% 0.12 ± 3% fio.latency_100us%
0.78 67% 1.30 ± 3% fio.latency_100ms%
0.19 ± 6% 30% 0.25 ± 5% fio.latency_50ms%
0.15 ± 5% 11% 0.17 fio.latency_50us%
3.97 11% 4.41 fio.latency_20us%
20703 11% 22942 fio.write_iops
81.03 82.20 fio.latency_10us%
3088 -10% 2787 fio.write_clat_mean_us
18124 -10% 16324 fio.write_clat_stddev
119552 -13% 103936 fio.write_clat_99%_us
11.62 ± 3% -14% 9.99 fio.latency_4us%
0.12 ± 3% -27% 0.09 fio.latency_250us%
2.01 -29% 1.42 fio.latency_250ms%
39.32 13% 44.57 fio.time.system_time
15 13% 17 fio.time.percent_of_cpu_this_job_got
49707540 11% 55081532 fio.time.file_system_outputs
242428 10% 267403 fio.time.voluntary_context_switches
186 8% 201 turbostat.Avg_MHz
7.51 8% 8.13 turbostat.%Busy
204308 7% 217660 vmstat.io.bo
19227 18% 22646 vmstat.system.cs
40994 8% 44327 vmstat.system.in
2811 17% 3303 iostat.sda.wrqm/s
24629 13% 27939 iostat.sda.w/s
221981 6% 235455 iostat.sda.wkB/s
6.54 3% 6.76 iostat.sda.avgqu-sz
5825638 18% 6863100 perf-stat.context-switches
1.091e+08 ± 3% 13% 1.234e+08 ± 3% perf-stat.dTLB-load-misses
30404 13% 34398 perf-stat.cpu-migrations
1.426e+11 ± 5% 12% 1.597e+11 perf-stat.dTLB-loads
6.696e+10 ± 5% 11% 7.427e+10 perf-stat.dTLB-stores
1.131e+09 ± 4% 10% 1.248e+09 perf-stat.branch-misses
5.751e+09 10% 6.302e+09 perf-stat.cache-misses
5.751e+09 10% 6.302e+09 perf-stat.cache-references
1.749e+08 8% 1.886e+08 perf-stat.iTLB-loads
1.01 1.04 perf-stat.branch-miss-rate%
fio.write_bw_MBps
92 ++---------------------------------------------------------------------+
| O |
90 O+O O O O O O O O O O O O |
| O O O O OO O O O |
| |
88 ++ |
| |
86 ++ |
| |
84 ++ |
| |
| |
82 ++ .*. |
*.*.*.*.*.*.*.*.*.*.*.*.*.*.*. .*.*.**.*.*. .*.*.*.*.*.* *.*.*.*.*.*.*
80 ++----------------------------*------------*---------------------------+
fio.write_iops
23500 ++------------------------------------------------------------------+
| O |
23000 O+O O O OO O O O O O O OO O |
| O O O O O O O |
| |
22500 ++ |
| |
22000 ++ |
| |
21500 ++ |
| |
| |
21000 ++ .*. |
*.*.*.*.**.*.*.*.*.*.*.*.**. .*.*.*.*.*.*. *.*.*.*.*.* *.**.*.*.*.*
20500 ++--------------------------*-------------*-------------------------+
fio.write_clat_mean_us
3150 ++-------------------------------------------------------------------+
| .*. .*. |
3100 *+*.*.*.*.*.**.*.*.*.*.*.*.* *.*.**.*.* *.*.*.*.*.*. .**.*.*.*.*.*
3050 ++ * |
| |
3000 ++ |
2950 ++ |
| |
2900 ++ |
2850 ++ |
| |
2800 ++ O O O OO O O O |
2750 O+O O O O O OO O O O O O O |
| O |
2700 ++-------------------------------------------------------------------+
fio.write_clat_stddev
18500 ++------------------------------------------------------------------+
| .*. .*.*. .*. .**. .*. |
*.* *.**.*.*.*.*.*.*.*.** *.* *.* *.* *.*.*.*.**.*.*.*.*
18000 ++ |
| |
| |
17500 ++ |
| |
17000 ++ |
| |
| |
16500 ++ |
| O O O O O O O O O O O O |
O O O O O O O O O O O |
16000 ++------------------------------------------------------------------+
fio.write_clat_99__us
122000 ++-----------------------------------------------------------------+
120000 ++*.*. *. .*. .*. .*. .*.*.*.*.**. .*.*.*.*.**. .*.*.*. *. |
* * *.* * ** * * * *.* *.*.*
118000 ++ |
116000 ++ |
| |
114000 ++ |
112000 ++ |
110000 ++ |
| |
108000 ++ |
106000 ++ |
| |
104000 O+O O OO O O O O O OO O O O O O O OO O O O |
102000 ++-----------------------------------------------------------------+
fio.latency_20us_
4.6 ++--------------------------------------------------------------------+
| O O O |
4.5 ++ O O O O O O O O O |
4.4 O+ O O O O O |
| O O O O O |
4.3 ++ |
4.2 ++ |
| |
4.1 ++* .*
4 ++ : *.* * .* |
* : + + + *. * *. .*.*.*.* *. .*.*.** *.*.*. .* |
3.9 ++ * *. .*.* *. + + + * + + * : : * |
3.8 ++ * *.* * * : : |
| :: |
3.7 ++------------------------------------------------------*-------------+
fio.latency_100us_
0.12 O+O-O---O-O-OO-O-O-----O-O-O--------O-O-O----------------------------+
| |
0.11 ++ O O O O O O O O |
| |
0.1 ++ |
| |
0.09 ++ |
| |
0.08 ++ |
| |
0.07 ++ |
| |
0.06 *+*.*.*.*.* * *.* *.* *.* * *.* *.* *.* |
| + :+ + + + + + : + + + + + + : + |
0.05 ++----------*--*-----*-*-----*-*----*-*---*-*-----*-*-----*----*-*-*-*
fio.latency_250us_
0.13 ++*---*-------------------------------*------------*--------------*-+
| :: :: :: :: ::|
0.125 ++ : : : : : : : : :|
0.12 ++ :: : : : : : : |
* * **.*.*.*.*.*.*.*.**.*.*.*.*.* *.**.*.*.* *.*.*.**.*.* *
0.115 ++ |
| |
0.11 ++ |
| |
0.105 ++ |
0.1 ++ |
| |
0.095 ++ |
| |
0.09 O+O-O-O-OO-O-O-O-O-O-O-O-OO-O-O-O-O-O-O-O-O-------------------------+
fio.latency_100ms_
1.5 ++--------------------------------------------------------------------+
| O |
1.4 O+ OO O |
1.3 ++ O O O O O O |
| O O O O O O O O O O O |
1.2 ++ O |
| |
1.1 ++ |
| |
1 ++ |
| |
0.9 ++ |
0.8 *+ .*. .*.*. .*. .*. .*.*.*. .*. .*.*.*. *.*.*. .*.*.*. |
| * *.* *.*.**.* * * *.* * *.* * *.*
0.7 ++--------------------------------------------------------------------+
fio.latency_250ms_
2.1 ++--------------------------------------------------------------------+
| * .*.*.* .** .*. .*.*.*
2 *+* *.*.*.*. .*.**.*. .*. + + .*. .* + .*. .* : * *.* |
1.9 ++ + + * * * * * * * : + |
| * * |
1.8 ++ |
| |
1.7 ++ |
| |
1.6 ++ |
1.5 ++ |
| O O O O O O |
1.4 ++ O O O O O O O O O O |
O O O O O |
1.3 ++----O------------O--------------------------------------------------+
fio.time.system_time
45 ++--------------------------O--------------O---------------------------+
| O O O O O O OO O O |
44 O+O O O O O O O O O O |
| |
43 ++ |
| |
42 ++ |
| |
41 ++ |
| |
40 ++ |
*.*. .*. .*. .*. .*.*. .*.*.*
39 ++ *. .*. .*.*.*. .*.*. * *. .*.*. .* * * * |
| * *. .* *.*.*.*.* * * * |
38 ++----------*----------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
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
View attachment "config-4.12.0-rc2-00012-g4f8caa60" of type "text/plain" (159381 bytes)
View attachment "job-script" of type "text/plain" (7347 bytes)
View attachment "job.yaml" of type "text/plain" (4914 bytes)
View attachment "reproduce" of type "text/plain" (435 bytes)
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