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: 2f93a1511473d4662c4b1067363bbc4d4b1b6cf3 ("ipc: merge ipc_rcu and kern_ipc_perm") url: https://github.com/0day-ci/linux/commits/Manfred-Spraul/ipc-sem-c-remove-sem_base-embed-struct-sem/20170516-040532 in testcase: will-it-scale on test machine: 8 threads Ivy Bridge with 16G memory with following parameters: nr_task: 100% mode: thread test: poll1 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 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: will-it-scale/100%-thread-poll1-performance/lkp-ivb-d01 2f2692332be60075 2f93a1511473d4662c4b106736 ---------------- -------------------------- 527 537 will-it-scale.time.user_time 4510290 -99% 67245 ± 6% will-it-scale.time.involuntary_context_switches 23331 -63% 8635 vmstat.system.in 35294 -84% 5767 ± 4% vmstat.system.cs 0.01 -36% 0.01 perf-stat.branch-miss-rate% 29759 ± 6% -10% 26893 ± 8% perf-stat.cpu-migrations 3613679 ± 16% -34% 2398073 ± 4% perf-stat.dTLB-store-misses 0.00 ± 16% -34% 0.00 ± 4% perf-stat.dTLB-store-miss-rate% 1.466e+08 -35% 94776084 perf-stat.branch-misses 1.122e+08 ± 18% -59% 46536402 ± 14% perf-stat.dTLB-load-misses 0.01 ± 18% -59% 0.00 ± 14% perf-stat.dTLB-load-miss-rate% 10721622 -84% 1747214 ± 4% perf-stat.context-switches perf-stat.branch-misses 1.6e+08 ++----------------------------------------------------------------+ *.*.*.*.*.*.*.*..*.*.*.*.*.*.*.*.*.*.*.*.* | 1.4e+08 ++ | 1.2e+08 ++ | | | 1e+08 O+O O O O O O O O O | O O O O O O O O O O O O O O O O O O O O O O | 8e+07 ++ | | | 6e+07 ++ | 4e+07 ++ | | | 2e+07 ++ | | | 0 ++---------------------------O------------------------------------+ perf-stat.dTLB-load-misses 2e+08 ++----------------------------------------------------------------+ 1.8e+08 *+ * * | | :: : | 1.6e+08 ++ : : : : | 1.4e+08 ++ : : : : * | |: : : : : * : | 1.2e+08 ++: * : : : : + : | 1e+08 ++*.*.*.*. + *.*.*.* *.*.*.*. : * | 8e+07 ++ * * | | | 6e+07 ++O O O O O O O O | 4e+07 ++ O O O O O O O O O O O O O O O O O O O O O O O O | 2e+07 ++ | 0 ++---------------------------O------------------------------------+ perf-stat.context-switches 1.2e+07 ++----------------------------------------------------------------+ *.*.*.*.*. .*.*..*.*.*.*.*.*.*.*.*.*. .*. | 1e+07 ++ * * * | | | | | 8e+06 ++ | | | 6e+06 ++ | | | 4e+06 ++ | | | | | 2e+06 O+O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O | | 0 ++---------------------------O------------------------------------+ perf-stat.branch-miss-rate_ 0.01 *+*-*-*--*-*-*-*-*-*-*-*--*-*-*-*-*-*-*-*--*------------------------+ 0.009 ++ | | | 0.008 ++ | 0.007 ++O O | O O O O O O O O O O O O O O O O O O O O O O O O O O O O 0.006 ++ O O | 0.005 ++ | 0.004 ++ | | | 0.003 ++ | 0.002 ++ | | | 0.001 ++ | 0 ++----------------------------O-------------------------------------+ perf-stat.dTLB-load-miss-rate_ 0.01 *+-------------*----------*-----------------------------------------+ 0.009 ++ : : | |: : : : : | 0.008 ++ : : : : | 0.007 ++ : : : : * | |: : : : : * + | 0.006 ++: * : : : + + + | 0.005 ++*.*.*..*. + *.*.*.* *.*.*.*.* * | 0.004 ++ * | | | 0.003 ++O O O O O O O O O | 0.002 ++ O O O O O O O O O O O O O O O O O O O O O O O | 0.001 ++ | 0 ++----------------------------O-------------------------------------+ will-it-scale.time.involuntary_context_switches 5e+06 ++----------------------------------------------------------------+ 4.5e+06 *+*.*.*.*.*.*.*..*.*.*.*.*.*.*.*.*.*.*.*.* | | | 4e+06 ++ | 3.5e+06 ++ | | | 3e+06 ++ | 2.5e+06 ++ | 2e+06 ++ | | | 1.5e+06 ++ | 1e+06 ++ | | | 500000 ++ | 0 O+O-O-O-O-O-O-O--O-O-O-O-O-O-O-O-O-O-O-O-O-O-O-O--O-O-O-O-O-O-O-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