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Message-ID: <20170703025722.GG7070@yexl-desktop>
Date: Mon, 3 Jul 2017 10:57:22 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Christoph Hellwig <hch@....de>
Cc: "Martin K. Petersen" <martin.petersen@...cle.com>,
LKML <linux-kernel@...r.kernel.org>,
James Bottomley <JBottomley@...n.com>,
"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
linux-scsi@...r.kernel.org, lkp@...org
Subject: [lkp-robot] [scsi] 5c279bd9e4: blogbench.read_score -10.0%
regression
Greeting,
FYI, we noticed a -10.0% regression of blogbench.read_score due to commit:
commit: 5c279bd9e40624f4ab6e688671026d6005b066fa ("scsi: default to scsi-mq")
https://git.kernel.org/cgit/linux/kernel/git/jejb/scsi.git misc
in testcase: blogbench
on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G memory
with following parameters:
disk: 1SSD
fs: ext4
cpufreq_governor: performance
test-description: Blogbench is a portable filesystem benchmark that tries to reproduce the load of a real-world busy file server.
test-url: https://www.pureftpd.org/project/blogbench
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: blogbench/1SSD-ext4-performance/lkp-bdw-de1
6d311fa7d2c18659 5c279bd9e40624f4ab6e688671
---------------- --------------------------
%stddev change %stddev
\ | \
292048 -10% 262860 blogbench.read_score
6628 ± 4% 50% 9913 ± 4% blogbench.write_score
104681 319% 439016 blogbench.time.involuntary_context_switches
1.178e+08 -27% 86266452 blogbench.time.file_system_inputs
3112606 -8% 2877831 blogbench.time.voluntary_context_switches
209 214 blogbench.time.percent_of_cpu_this_job_got
603 620 blogbench.time.system_time
80955370 37% 1.11e+08 blogbench.time.file_system_outputs
193975 -27% 141449 vmstat.io.bi
152861 35% 205958 vmstat.io.bo
24997 124% 56094 vmstat.system.cs
33317 7% 35633 vmstat.system.in
428.54 ± 10% -30% 300.32 ± 8% iostat.sda.rrqm/s
9670 -28% 6988 iostat.sda.r/s
193974 -27% 141449 iostat.sda.rkB/s
172120 31% 225064 iostat.sda.wkB/s
8583.63 4% 8896.15 iostat.sda.wrqm/s
6074 77% 10748 iostat.sda.w/s
7593732 125% 17107441 perf-stat.context-switches
21914349 ± 3% 24% 27154223 ± 4% perf-stat.dTLB-store-misses
3.952e+11 8% 4.27e+11 perf-stat.dTLB-loads
2.524e+11 7% 2.701e+11 perf-stat.branch-instructions
4.634e+10 6% 4.892e+10 perf-stat.cache-references
1.468e+09 11% 1.627e+09 perf-stat.branch-misses
4.634e+10 6% 4.892e+10 perf-stat.cache-misses
1.314e+12 8% 1.425e+12 perf-stat.instructions
2.289e+08 25% 2.86e+08 ± 4% perf-stat.iTLB-loads
2.279e+08 15% 2.632e+08 ± 3% perf-stat.dTLB-load-misses
0.06 7% 0.06 perf-stat.dTLB-load-miss-rate%
0.59 10% 0.65 perf-stat.ipc
0.01 ± 3% 13% 0.01 ± 4% perf-stat.dTLB-store-miss-rate%
2.291e+11 9% 2.503e+11 perf-stat.dTLB-stores
0.58 4% 0.60 perf-stat.branch-miss-rate%
285094 22% 346640 perf-stat.cpu-migrations
blogbench.write_score
12000 ++------------------------------------------------------------------+
| |
11000 ++ O |
| O O O O O O O O |
O OO O O |
10000 ++ O O O O O O O O O O |
|O O O O O O OO |
9000 ++ |
| O |
8000 ++ |
| |
| |
7000 ** ***.* **** * ***.*** *** * .*** * * **. ** **
| * * ****.* ***** * ** * ***** *.**** *** * ::|
6000 ++----------------------------------------------------------------*-+
[*] 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-rc5-00248-g5c279bd" of type "text/plain" (159291 bytes)
View attachment "job-script" of type "text/plain" (7057 bytes)
View attachment "job.yaml" of type "text/plain" (4609 bytes)
View attachment "reproduce" of type "text/plain" (405 bytes)
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