Greeting, FYI, we noticed a 8.5% improvement of aim9.shared_memory.ops_per_sec due to commit: commit: deb3c07db928d41e24bf3a14db7ae2efb04d1a64 ("ipc/sem.c: avoid using spin_unlock_wait()") https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master in testcase: aim9 on test machine: 4 threads Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz with 4G memory with following parameters: testtime: 300s test: shared_memory cpufreq_governor: performance test-description: Suite IX is the "AIM Independent Resource Benchmark:" the famous synthetic benchmark. test-url: https://sourceforge.net/projects/aimbench/files/aim-suite9/ 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: aim9/300s-shared_memory-performance/lkp-ivb-d03 cd9b83cf9743054b deb3c07db928d41e24bf3a14db ---------------- -------------------------- %stddev change %stddev \ | \ 1109670 9% 1204542 aim9.shared_memory.ops_per_sec 3330028 9% 3614611 aim9.time.minor_page_faults 9.49 9.59 turbostat.CorWatt fail:runs %reproduction fail:runs | | | :4 75% 3:4 kmsg.DHCP/BOOTP:Reply_not_for_us_on_eth#,op[#]xid[#] 178652 ±150% -2e+05 14730 ± 47% latency_stats.avg.max 178652 ±150% -2e+05 15462 ± 43% latency_stats.max.max 19349 19135 vmstat.system.in 31348 30974 vmstat.system.cs 85166159 ± 8% 93% 1.641e+08 ± 43% perf-stat.dTLB-load-misses 3616922 8% 3901834 perf-stat.page-faults 3616922 8% 3901834 perf-stat.minor-faults 1.44 8% 1.55 perf-stat.ipc 9464369 9349448 perf-stat.context-switches perf-stat.page-faults 4.05e+06 ++---------------------------------------------------------------+ 4e+06 ++ O | | O | 3.95e+06 ++ O O O | 3.9e+06 OOOO O OO | 3.85e+06 ++ O O O | 3.8e+06 ++ | | | 3.75e+06 ++ | 3.7e+06 ++ | 3.65e+06 ++ *. ** * | 3.6e+06 ++**.** * * *** **.**** *.*** * * **** *. * * ** * **** * : * * * : * * * : * * ***.** : ::+ | 3.55e+06 ++ : +: : * | 3.5e+06 +*------------------------*-----------*-------------------*------+ perf-stat.minor-faults 4.05e+06 ++---------------------------------------------------------------+ 4e+06 ++ O | | O | 3.95e+06 ++ O O O | 3.9e+06 OOOO O OO | 3.85e+06 ++ O O O | 3.8e+06 ++ | | | 3.75e+06 ++ | 3.7e+06 ++ | 3.65e+06 ++ *. ** * | 3.6e+06 ++**.** * * *** **.**** *.*** * * **** *. * * ** * **** * : * * * : * * * : * * ***.** : ::+ | 3.55e+06 ++ : +: : * | 3.5e+06 +*------------------------*-----------*-------------------*------+ aim9.shared_memory.ops_per_sec 1.24e+06 ++----O----------------------------------------------------------+ | O | 1.22e+06 ++ O O O | 1.2e+06 OOOO O O O OO | | O | 1.18e+06 ++ | 1.16e+06 ++ | | | 1.14e+06 ++ | 1.12e+06 ++ ** * | | **. **.*** **. *** *.* * ** * * ** * ** * 1.1e+06 *+: ***** * * : ***** * : ****.* * *.** : ::+ *| 1.08e+06 ++ : +: * : * | |* * * * | 1.06e+06 ++---------------------------------------------------------------+ aim9.time.minor_page_faults 3.75e+06 ++---------------------------------------------------------------+ 3.7e+06 ++ O | | O O O O | 3.65e+06 ++ | 3.6e+06 OOOO O O O OO | 3.55e+06 ++ O | 3.5e+06 ++ | | | 3.45e+06 ++ | 3.4e+06 ++ ** | 3.35e+06 ++ *.* : :*. ** ** * | 3.3e+06 *+**.****** ** * * ** *.******** ******.** * *.* ** : **** |:: :: + : * * : :+ | 3.25e+06 +* * * * * | 3.2e+06 ++---------------------------------------------------------------+ [*] 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