FYI, we noticed the below changes on commit 76835b0ebf8a7fe85beb03c75121419a7dec52f0 ("futex: Ensure get_futex_key_refs() always implies a barrier") 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 testbox/testcase/testparams ---------------- -------------------------- --------------------------- %stddev %change %stddev \ | \ 9204866 ± 0% -10.2% 8266680 ± 0% lkp-wsx01/will-it-scale/performance-futex3 11271283 ± 0% -12.1% 9911001 ± 0% nhm4/will-it-scale/performance-futex3 10185806 -11.1% 9051578 GEO-MEAN will-it-scale.per_process_ops 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 9211097 ± 0% -10.2% 8268370 ± 0% lkp-wsx01/will-it-scale/performance-futex3 11324367 ± 0% -12.0% 9969101 ± 0% nhm4/will-it-scale/performance-futex3 10213219 -11.1% 9078999 GEO-MEAN will-it-scale.per_thread_ops 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 0.63 ± 0% +6.3% 0.66 ± 0% lkp-wsx01/will-it-scale/performance-futex3 0.66 ± 0% +9.6% 0.72 ± 0% nhm4/will-it-scale/performance-futex3 0.64 +7.9% 0.69 GEO-MEAN will-it-scale.scalability 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 2.01 ± 1% +365.3% 9.35 ± 1% lkp-wsx01/will-it-scale/performance-futex3 1.67 ± 1% +509.7% 10.17 ± 3% nhm4/will-it-scale/performance-futex3 1.83 +432.6% 9.75 GEO-MEAN perf-profile.cpu-cycles.get_futex_key_refs.isra.11.futex_wake.do_futex.sys_futex.system_call_fastpath 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1 ± 34% +200.0% 4 ± 17% lkp-wsx01/will-it-scale/performance-futex3 1 +200.0% 4 GEO-MEAN sched_debug.cpu#63.nr_uninterruptible 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 161 ± 27% +159.0% 418 ± 29% lkp-wsx01/will-it-scale/performance-futex3 161 +159.0% 418 GEO-MEAN sched_debug.cpu#48.sched_goidle 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 395 ± 23% +146.2% 972 ± 27% lkp-wsx01/will-it-scale/performance-futex3 395 +146.2% 972 GEO-MEAN sched_debug.cpu#48.nr_switches 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 404 ± 23% +143.3% 984 ± 27% lkp-wsx01/will-it-scale/performance-futex3 404 +143.3% 984 GEO-MEAN sched_debug.cpu#48.sched_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 434 ± 32% -68.0% 139 ± 20% lkp-wsx01/will-it-scale/performance-futex3 434 -68.0% 138 GEO-MEAN sched_debug.cpu#61.ttwu_local 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 5335 ± 48% -54.4% 2433 ± 43% lkp-wsx01/will-it-scale/performance-futex3 5335 -54.4% 2433 GEO-MEAN sched_debug.cpu#20.sched_goidle 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 498 ± 23% -54.4% 227 ± 25% lkp-wsx01/will-it-scale/performance-futex3 498 -54.4% 227 GEO-MEAN sched_debug.cpu#55.sched_goidle 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 576 ± 26% -46.8% 306 ± 34% lkp-wsx01/will-it-scale/performance-futex3 576 -46.8% 306 GEO-MEAN sched_debug.cpu#55.ttwu_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 0.47 ± 7% +119.7% 1.02 ± 5% nhm4/will-it-scale/performance-futex3 0.47 +119.7% 1.02 GEO-MEAN perf-profile.cpu-cycles.ret_from_sys_call.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 11216 ± 46% -49.6% 5648 ± 38% lkp-wsx01/will-it-scale/performance-futex3 11216 -49.6% 5648 GEO-MEAN sched_debug.cpu#20.nr_switches 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 11237 ± 46% -49.5% 5669 ± 38% lkp-wsx01/will-it-scale/performance-futex3 11237 -49.5% 5669 GEO-MEAN sched_debug.cpu#20.sched_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1232 ± 27% -52.8% 581 ± 21% lkp-wsx01/will-it-scale/performance-futex3 1232 -52.8% 581 GEO-MEAN sched_debug.cpu#55.nr_switches 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 155 ± 36% +182.5% 438 ± 40% lkp-wsx01/will-it-scale/performance-futex3 155 +182.5% 438 GEO-MEAN sched_debug.cpu#48.ttwu_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1245 ± 27% -52.5% 591 ± 21% lkp-wsx01/will-it-scale/performance-futex3 1245 -52.5% 591 GEO-MEAN sched_debug.cpu#55.sched_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1461 ± 31% -46.9% 776 ± 23% lkp-wsx01/will-it-scale/performance-futex3 1461 -46.9% 776 GEO-MEAN sched_debug.cpu#42.ttwu_local 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 856 ± 34% -50.2% 426 ± 31% lkp-wsx01/will-it-scale/performance-futex3 855 -50.2% 426 GEO-MEAN sched_debug.cpu#58.ttwu_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 926 ± 19% -41.0% 546 ± 24% lkp-wsx01/will-it-scale/performance-futex3 926 -41.0% 546 GEO-MEAN sched_debug.cpu#61.ttwu_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1593 ± 17% -45.1% 875 ± 20% lkp-wsx01/will-it-scale/performance-futex3 1593 -45.1% 875 GEO-MEAN sched_debug.cpu#61.nr_switches 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 3667 ± 25% -38.3% 2263 ± 18% lkp-wsx01/will-it-scale/performance-futex3 3667 -38.3% 2262 GEO-MEAN sched_debug.cpu#42.nr_switches 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1604 ± 17% -44.8% 885 ± 20% lkp-wsx01/will-it-scale/performance-futex3 1604 -44.8% 885 GEO-MEAN sched_debug.cpu#61.sched_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 3680 ± 25% -38.1% 2279 ± 18% lkp-wsx01/will-it-scale/performance-futex3 3680 -38.1% 2279 GEO-MEAN sched_debug.cpu#42.sched_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 402 ± 22% +45.4% 585 ± 29% lkp-wsx01/will-it-scale/performance-futex3 402 +45.4% 585 GEO-MEAN sched_debug.cpu#70.sched_goidle 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 153 ± 13% -35.3% 99 ± 22% nhm4/will-it-scale/performance-futex3 153 -35.3% 99 GEO-MEAN sched_debug.cpu#6.load 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 595 ± 21% +108.8% 1242 ± 40% lkp-wsx01/will-it-scale/performance-futex3 595 +108.8% 1242 GEO-MEAN sched_debug.cpu#70.ttwu_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1127 ± 31% -42.3% 651 ± 8% nhm4/will-it-scale/performance-futex3 1127 -42.3% 650 GEO-MEAN sched_debug.cfs_rq[3]:/.blocked_load_avg 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 16.48 ± 1% +56.0% 25.71 ± 2% nhm4/will-it-scale/performance-futex3 16.48 +56.0% 25.71 GEO-MEAN perf-profile.cpu-cycles.futex_wake.do_futex.sys_futex.system_call_fastpath.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 575 ± 24% -39.7% 346 ± 21% lkp-wsx01/will-it-scale/performance-futex3 575 -39.7% 346 GEO-MEAN sched_debug.cpu#61.sched_goidle 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 534 ± 11% +63.0% 871 ± 35% lkp-wsx01/will-it-scale/performance-futex3 534 +63.0% 871 GEO-MEAN sched_debug.cpu#45.nr_switches 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 545 ± 11% +62.0% 883 ± 35% lkp-wsx01/will-it-scale/performance-futex3 545 +62.0% 882 GEO-MEAN sched_debug.cpu#45.sched_count 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 10 ± 26% -44.0% 5 ± 18% lkp-wsx01/will-it-scale/performance-futex3 10 -44.0% 5 GEO-MEAN sched_debug.cpu#72.cpu_load[0] 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 827 ± 26% +55.5% 1286 ± 23% nhm4/will-it-scale/performance-futex3 826 +55.5% 1285 GEO-MEAN sched_debug.cfs_rq[4]:/.blocked_load_avg 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1245 ± 28% -38.8% 762 ± 8% nhm4/will-it-scale/performance-futex3 1245 -38.8% 762 GEO-MEAN sched_debug.cfs_rq[3]:/.tg_load_contrib 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 969 ± 22% +48.4% 1438 ± 20% nhm4/will-it-scale/performance-futex3 969 +48.4% 1438 GEO-MEAN sched_debug.cfs_rq[4]:/.tg_load_contrib 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 133 ± 11% -28.7% 95 ± 22% nhm4/will-it-scale/performance-futex3 133 -28.7% 95 GEO-MEAN sched_debug.cfs_rq[6]:/.load 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 799 ± 19% -34.8% 521 ± 26% nhm4/will-it-scale/performance-futex3 799 -34.8% 521 GEO-MEAN sched_debug.cfs_rq[2]:/.blocked_load_avg 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 906 ± 17% -30.8% 627 ± 21% nhm4/will-it-scale/performance-futex3 906 -30.8% 627 GEO-MEAN sched_debug.cfs_rq[2]:/.tg_load_contrib 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 70 ± 10% +21.7% 85 ± 9% nhm4/will-it-scale/performance-futex3 70 +21.7% 85 GEO-MEAN sched_debug.cpu#2.cpu_load[3] 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 3149 ± 11% -15.0% 2677 ± 10% lkp-wsx01/will-it-scale/performance-futex3 3149 -15.0% 2676 GEO-MEAN sched_debug.cpu#71.curr->pid 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 68 ± 12% +23.5% 84 ± 9% nhm4/will-it-scale/performance-futex3 68 +23.5% 83 GEO-MEAN sched_debug.cpu#2.cpu_load[4] 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 214345 ± 13% +31.5% 281773 ± 13% nhm4/will-it-scale/performance-futex3 214345 +31.5% 281773 GEO-MEAN sched_debug.cfs_rq[2]:/.min_vruntime 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 38234 ± 5% -17.6% 31518 ± 1% nhm4/will-it-scale/performance-futex3 38234 -17.6% 31518 GEO-MEAN softirqs.RCU 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 37071 ± 15% +36.8% 50702 ± 15% nhm4/will-it-scale/performance-futex3 37071 +36.8% 50702 GEO-MEAN sched_debug.cfs_rq[2]:/.exec_clock 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 324067 ± 8% -18.2% 265084 ± 14% nhm4/will-it-scale/performance-futex3 324067 -18.2% 265084 GEO-MEAN sched_debug.cfs_rq[6]:/.min_vruntime 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 103 ± 5% -21.8% 81 ± 9% nhm4/will-it-scale/performance-futex3 103 -21.8% 81 GEO-MEAN sched_debug.cpu#6.cpu_load[2] 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 114 ± 4% -21.6% 89 ± 12% nhm4/will-it-scale/performance-futex3 114 -21.6% 89 GEO-MEAN sched_debug.cpu#6.cpu_load[1] 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 58381 ± 10% -23.2% 44812 ± 18% nhm4/will-it-scale/performance-futex3 58381 -23.2% 44812 GEO-MEAN sched_debug.cfs_rq[6]:/.exec_clock 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 82318 ± 11% -20.7% 65237 ± 13% nhm4/will-it-scale/performance-futex3 82318 -20.7% 65237 GEO-MEAN sched_debug.cpu#1.nr_load_updates 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 95 ± 7% -19.9% 76 ± 8% nhm4/will-it-scale/performance-futex3 95 -19.9% 76 GEO-MEAN sched_debug.cpu#6.cpu_load[4] 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 7.76 ± 0% +15.3% 8.95 ± 0% lkp-wsx01/will-it-scale/performance-futex3 6.55 ± 3% +22.3% 8.01 ± 1% nhm4/will-it-scale/performance-futex3 7.13 +18.8% 8.47 GEO-MEAN perf-profile.cpu-cycles.get_futex_key.futex_wake.do_futex.sys_futex.system_call_fastpath 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 98 ± 7% -20.5% 78 ± 8% nhm4/will-it-scale/performance-futex3 98 -20.5% 78 GEO-MEAN sched_debug.cpu#6.cpu_load[3] 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1.22 ± 4% -15.5% 1.03 ± 9% nhm4/will-it-scale/performance-futex3 1.22 -15.5% 1.03 GEO-MEAN perf-profile.cpu-cycles.drop_futex_key_refs.isra.12.do_futex.sys_futex.system_call_fastpath.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 3.76 ± 0% -13.5% 3.25 ± 0% lkp-wsx01/will-it-scale/performance-futex3 3.23 ± 2% -15.0% 2.75 ± 2% nhm4/will-it-scale/performance-futex3 3.49 -14.3% 2.99 GEO-MEAN perf-profile.cpu-cycles.sysret_check.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 3053 ± 8% -18.2% 2499 ± 13% nhm4/will-it-scale/performance-futex3 3053 -18.2% 2499 GEO-MEAN sched_debug.cpu#6.curr->pid 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 11.31 ± 0% -11.2% 10.05 ± 0% lkp-wsx01/will-it-scale/performance-futex3 11.27 ± 1% -16.4% 9.43 ± 1% nhm4/will-it-scale/performance-futex3 11.29 -13.8% 9.73 GEO-MEAN perf-profile.cpu-cycles.system_call.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 18.21 ± 1% -13.6% 15.74 ± 2% nhm4/will-it-scale/performance-futex3 18.21 -13.6% 15.74 GEO-MEAN perf-profile.cpu-cycles.hash_futex.do_futex.sys_futex.system_call_fastpath.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 12.56 ± 0% -12.2% 11.03 ± 1% lkp-wsx01/will-it-scale/performance-futex3 12.54 ± 1% -14.4% 10.73 ± 3% nhm4/will-it-scale/performance-futex3 12.55 -13.3% 10.88 GEO-MEAN perf-profile.cpu-cycles.system_call_after_swapgs.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 21140 ± 9% +17.5% 24849 ± 8% nhm4/will-it-scale/performance-futex3 21140 +17.5% 24849 GEO-MEAN sched_debug.cfs_rq[2]:/.avg->runnable_avg_sum 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 4.52 ± 2% -11.5% 4.00 ± 1% lkp-wsx01/will-it-scale/performance-futex3 42.44 ± 0% +13.8% 48.30 ± 2% nhm4/will-it-scale/performance-futex3 13.85 +0.4% 13.90 GEO-MEAN perf-profile.cpu-cycles.do_futex.sys_futex.system_call_fastpath.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1.21 ± 1% -11.4% 1.08 ± 1% lkp-wsx01/will-it-scale/performance-futex3 1.21 -11.4% 1.08 GEO-MEAN perf-profile.cpu-cycles.drop_futex_key_refs.isra.12.futex_wake.do_futex.sys_futex.system_call_fastpath 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 50.65 ± 0% +11.9% 56.69 ± 2% nhm4/will-it-scale/performance-futex3 50.65 +11.9% 56.69 GEO-MEAN perf-profile.cpu-cycles.system_call_fastpath.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 20.50 ± 0% -10.9% 18.25 ± 0% lkp-wsx01/will-it-scale/performance-futex3 20.50 -10.9% 18.25 GEO-MEAN perf-profile.cpu-cycles.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 27368 ± 7% -13.6% 23638 ± 8% nhm4/will-it-scale/performance-futex3 27368 -13.6% 23638 GEO-MEAN sched_debug.cfs_rq[6]:/.avg->runnable_avg_sum 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 4.92 ± 0% -11.5% 4.36 ± 1% lkp-wsx01/will-it-scale/performance-futex3 48.57 ± 0% +11.3% 54.04 ± 2% nhm4/will-it-scale/performance-futex3 15.46 -0.7% 15.34 GEO-MEAN perf-profile.cpu-cycles.sys_futex.system_call_fastpath.syscall 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 596 ± 7% -13.6% 515 ± 8% nhm4/will-it-scale/performance-futex3 596 -13.6% 515 GEO-MEAN sched_debug.cfs_rq[6]:/.tg_runnable_contrib 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 3007 ± 6% -11.8% 2654 ± 13% lkp-wsx01/will-it-scale/performance-futex3 3007 -11.8% 2653 GEO-MEAN sched_debug.cpu#38.curr->pid 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 39113 ± 2% +10.7% 43292 ± 4% nhm4/will-it-scale/performance-futex3 39113 +10.7% 43292 GEO-MEAN cpuidle.C6-NHM.usage 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 1401 ± 0% -10.1% 1260 ± 0% lkp-wsx01/will-it-scale/performance-futex3 199 ± 0% -21.5% 156 ± 2% nhm4/will-it-scale/performance-futex3 528 -16.0% 443 GEO-MEAN time.user_time 0429fbc0bdc297d6 76835b0ebf8a7fe85beb03c751 ---------------- -------------------------- 3901 ± 0% +3.6% 4041 ± 0% lkp-wsx01/will-it-scale/performance-futex3 522 ± 0% +8.2% 565 ± 0% nhm4/will-it-scale/performance-futex3 1428 +5.9% 1511 GEO-MEAN time.system_time lkp-wsx01: Westmere-EX Memory: 128G nhm4: Nehalem Memory: 4G will-it-scale.scalability 0.73 ++----------------------------------------O--------------------------+ O O O O O O O O O O O O O 0.72 ++ | 0.71 ++ | | | 0.7 ++ | | | 0.69 ++ | | | 0.68 ++ | 0.67 ++ | | | 0.66 *+...*.....*....*.... ..*.... ..*.....*....* | | *.....*.. *.. | 0.65 ++-------------------------------------------------------------------+ will-it-scale.per_process_ops 1.14e+07 ++---------------------------------------------------------------+ *....*....*....*.... ..*....*....*....*....*....* | 1.12e+07 ++ *.. | | | 1.1e+07 ++ | 1.08e+07 ++ | | | 1.06e+07 ++ | | | 1.04e+07 ++ | 1.02e+07 ++ | | | 1e+07 ++ | O O O O O O O O O O O O O O 9.8e+06 ++---------------------------------------------------------------+ will-it-scale.per_thread_ops 1.14e+07 ++---------------------------------------------------------------+ *....*....*....*....*....*....*....*....*....*....* | 1.12e+07 ++ | | | 1.1e+07 ++ | 1.08e+07 ++ | | | 1.06e+07 ++ | | | 1.04e+07 ++ | 1.02e+07 ++ | | | 1e+07 O+ O O O O O O O O O O | O O O | 9.8e+06 ++---------------------------------------------------------------+ 28 ++---------------------------------------------------------------------+ | O | 26 O+ O O O O O O O O O O | O O | 24 ++ | | | 22 ++ | | | 20 ++ | | | 18 ++ | | ...*....*..... ..*.....*.... ...*....*..... | 16 *+...*.. *.. *.. * | | | 14 ++---------------------------------------------------------------------+ 11 ++---------------------------------------------------------------------+ 10 O+ O O O O O O O O O O O | O O | 9 ++ | 8 ++ | | | 7 ++ | 6 ++ | 5 ++ | | | 4 ++ | 3 ++ | | | 2 *+...*.....*....*.....*....*.....*....*.....*....*.....* | 1 ++---------------------------------------------------------------------+ 9 ++--------------------------------------------------------------------+ | | 8.5 ++ O | | O | O O O O O O 8 ++ O O O O O O | | | 7.5 ++ | | | 7 ++ | | *.... | | .. *..... ..*....*.... .*....*..... | 6.5 ++ . *.. . .. * | | .. *. | 6 *+---*----------------------------------------------------------------+ [*] bisect-good sample [O] bisect-bad sample To reproduce: apt-get install ruby ruby-oj git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/setup-local job.yaml # the job file attached in this email bin/run-local job.yaml 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, Fengguang _______________________________________________ LKP mailing list LKP(a)linux.intel.com