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: cf7a2dca6056544bb04a8f819fbbdb415bdb2933 ("sched,rcu: Make cond_resched() provide RCU quiescent state") https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2016.12.05c in testcase: will-it-scale on test machine: 32 threads Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz with 64G memory with following parameters: test: unlink2 cpufreq_governor: performance test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two. test-url: https://github.com/antonblanchard/will-it-scale 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: will-it-scale/unlink2-performance/lkp-sb03 15705d6709cb6ba6 cf7a2dca6056544bb04a8f819f ---------------- -------------------------- %stddev change %stddev \ | \ 116286 114432 will-it-scale.per_process_ops 20902 ± 5% 186% 59731 ± 5% will-it-scale.time.involuntary_context_switches 2694 ± 8% 61% 4344 vmstat.system.cs 10903 ± 99% -1e+04 148 ± 5% latency_stats.max.wait_on_page_bit.__migration_entry_wait.migration_entry_wait.do_swap_page.handle_mm_fault.__do_page_fault.do_page_fault.page_fault 3583 ± 38% 1e+04 14010 ± 51% latency_stats.sum.ep_poll.SyS_epoll_wait.entry_SYSCALL_64_fastpath 4143 ± 24% 1e+04 14549 ± 51% latency_stats.sum.ep_poll.SyS_epoll_wait.do_syscall_64.return_from_SYSCALL_64 271108 ± 71% -2e+05 66364 ± 32% latency_stats.sum.wait_on_page_bit.__migration_entry_wait.migration_entry_wait.do_swap_page.handle_mm_fault.__do_page_fault.do_page_fault.page_fault 834637 ± 8% 62% 1351381 perf-stat.context-switches 16449 ± 3% 54% 25349 ± 3% perf-stat.cpu-migrations 25.94 35% 35.02 perf-stat.node-store-miss-rate% 2.534e+09 32% 3.335e+09 perf-stat.node-store-misses 1.002e+12 4% 1.043e+12 perf-stat.dTLB-stores 50923913 3% 52692115 perf-stat.iTLB-loads 1.696e+12 1.745e+12 perf-stat.dTLB-loads 1.258e+12 1.291e+12 perf-stat.branch-instructions 6.132e+12 6.274e+12 perf-stat.instructions 0.37 0.38 perf-stat.ipc 0.37 -3% 0.35 perf-stat.branch-miss-rate% 29.83 -4% 28.66 perf-stat.cache-miss-rate% 1.117e+10 -4% 1.071e+10 perf-stat.cache-misses 7.232e+09 -14% 6.187e+09 perf-stat.node-stores will-it-scale.time.involuntary_context_switches 80000 ++------------------------------------------------------------------+ | O O | 70000 ++ | 60000 O+ O O O O O O | | O O O O O O O O O | 50000 ++ O O O O | | | 40000 ++ | | | 30000 *+*.*.. .*. .*.*.. .*. .*. .*.*.*.. .*.*. .*..*.* | 20000 ++ * * *.* *.*..* * * * + .*.*..*.*.| | * * 10000 ++ | | | 0 ++--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, Ying Huang