Greeting, FYI, we noticed a 4.9% improvement of blogbench.read_score due to commit: commit: 726d061fbd3658e4bfeffa1b8e82da97de2ca4dd ("mm: vmscan: kick flushers when we encounter dirty pages on the LRU") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master 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: xfs 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-xfs-performance/lkp-bdw-de1 1276ad68e2491d1c 726d061fbd3658e4bfeffa1b8e ---------------- -------------------------- %stddev change %stddev \ | \ 629663 5% 660655 blogbench.read_score 11652 11315 blogbench.write_score 90104100 3% 92976182 blogbench.time.file_system_inputs 385 393 blogbench.time.percent_of_cpu_this_job_got 1097 1119 blogbench.time.system_time 82479458 80610672 blogbench.time.file_system_outputs 722 733 turbostat.Avg_MHz 29.16 29.58 turbostat.%Busy 151151 3% 155898 vmstat.io.bi 154634 151517 vmstat.io.bo 26150 3% 27021 vmstat.system.in 8.129e+10 8.275e+10 perf-stat.cache-misses 8.129e+10 8.275e+10 perf-stat.cache-references 3.389e+12 3.44e+12 perf-stat.cpu-cycles 0.50 0.50 perf-stat.ipc 126 3% 130 iostat.sda.avgqu-sz 151110 3% 155774 iostat.sda.rkB/s 7250 7455 iostat.sda.r/s 1978 2033 iostat.sda.w/s 172839 167774 iostat.sda.wkB/s 10850 -44% 6053 iostat.sda.wrqm/s [*] 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