Greeting, There is no primary kpi change in this test, below is the data collected through multiple monitors running background just for your information. commit: 8c3071ca7c0b134f6421ad53281d6e0f8ec692f2 ("rcu: Check cond_resched_rcu_qs() state less often to reduce GP overhead") https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2016.12.05c in testcase: dbench on test machine: 48 threads Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz with 64G memory with following parameters: nr_threads: 100% cpufreq_governor: performance test-description: DBENCH is a tool to generate I/O workloads to either a filesystem or to a networked CIFS or NFS server. test-url: https://dbench.samba.org/ Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/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: dbench/100%-performance/ivb44 cf7a2dca6056544b 8c3071ca7c0b134f6421ad5328 ---------------- -------------------------- %stddev change %stddev \ | \ 1084832 -42% 629512 dbench.time.involuntary_context_switches 6164 5% 6492 ± 3% vmstat.system.cs 76.41 ± 19% -29% 53.90 ± 22% turbostat.CorWatt 103.41 ± 19% -31% 70.98 ± 21% turbostat.PkgWatt 5.98 ± 21% -40% 3.58 ± 17% turbostat.RAMWatt dbench.time.involuntary_context_switches 1.2e+06 ++----------------------------------------------------------------+ | * * .*..*.* 1e+06 ++ : : + : * | | : : + : + | *.*..*.* *.*..*.*.*..*.*.*..*.*.*..* * *..*.*.*..* | 800000 ++ : : | | : : | 600000 O+O O O:O :O O O O O O O O O O O O O O O O O O | | : : | 400000 ++ : : | | : : | | : : | 200000 ++ :: | | : | 0 ++-------*--------------------------------------------------------+ [*] 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