Greeting, FYI, we noticed a -2.9% regression of unixbench.score due to commit: commit: c79fc8b482c2043b312f63f68c57e311daac4a23 ("sched,rcu: Make cond_resched() provide RCU quiescent state") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: unixbench on test machine: 4 threads Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz with 4G memory with following parameters: runtime: 300s nr_task: 1 test: pipe cpufreq_governor: performance test-description: UnixBench is the original BYTE UNIX benchmark suite aims to test performance of Unix-like system. test-url: https://github.com/kdlucas/byte-unixbench 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: unixbench/300s-1-pipe-performance/lkp-ivb-d04 8be6e1b15c544021 c79fc8b482c2043b312f63f68c ---------------- -------------------------- %stddev change %stddev \ | \ 1725 -2.9% 1674 unixbench.score 9169032 9041678 perf-stat.context-switches 23440 23172 vmstat.system.cs unixbench.score 1800 *+**-*-**-*----**-*-**-*-**-*-**-*-**-**-*-**-*-**-*-**-*-**-**------+ O OO OO O *O OO O OO O OO O OO O OO OO O OO O OO O O *.**.* 1600 ++ | 1400 ++ | | | 1200 ++ | 1000 ++ | | | 800 ++ | 600 ++ | | | 400 ++ | 200 ++ | | | 0 ++---O------O--------------------------------------------------------+ [*] 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