Hi, Ming Lei On 07/06, Ming Lei wrote: >Hi Xiaolong, > >On Mon, Jul 3, 2017 at 10:57 AM, kernel test robot ><xiaolong.ye@xxxxxxxxx> wrote: >> >> Greeting, >> >> FYI, we noticed a -10.0% regression of blogbench.read_score due to commit: > >Looks like related with mq scheduler, could you test the following patch to see >if your issue can be fixed? > >https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-linus&id=32825c45ff8f4cce937ab85b030dc693ceb1aa0a > Here is the comparison of commit 5c279bd9e4 and 32825c45, it does help recover performance back. $ compare -at 5c279bd9e40624f4ab6e688671026d6005b066fa 32825c45ff8f4cce937ab85b030dc693ceb1aa0a tests: 1 testcase/path_params/tbox_group/run: blogbench/1SSD-ext4-performance/lkp-bdw-de1 5c279bd9e40624f4 32825c45ff8f4cce937ab85b03 ---------------- -------------------------- %stddev change %stddev \ | \ 262860 36% 358558 blogbench.read_score 9913 ± 4% -33% 6654 blogbench.write_score 86266452 31% 1.129e+08 blogbench.time.file_system_inputs 29.89 22% 36.46 blogbench.time.user_time 214 13% 242 blogbench.time.percent_of_cpu_this_job_got 620 12% 696 blogbench.time.system_time 1.11e+08 -29% 79019314 blogbench.time.file_system_outputs 439016 -69% 135286 blogbench.time.involuntary_context_switches 0.64 22% 0.78 mpstat.cpu.usr% 7.02 ± 4% -47% 3.72 mpstat.cpu.idle% 237216 1344% 3425183 softirqs.RCU 430504 376% 2048486 softirqs.TIMER 188376 211% 586308 softirqs.SCHED 306478 ± 32% -99% 4150 ± 36% softirqs.NET_RX 86266452 31% 1.129e+08 time.file_system_inputs 29.89 22% 36.46 time.user_time Thanks, Xiaolong > >Thanks, >Ming Lei
