Greeting, FYI, we noticed a -5.1% regression of unixbench.score due to commit: commit: f1a7941243c102a44e8847e3b94ff4ff3ec56f25 ("mm: convert mm's rss stats into percpu_counter") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: unixbench on test machine: 128 threads 4 sockets Intel(R) Xeon(R) Gold 6338 CPU @ 2.00GHz (Ice Lake) with 256G memory with following parameters: runtime: 300s nr_task: 1 test: shell8 cpufreq_governor: performance test-description: UnixBench is the original BYTE UNIX benchmark suite aims to test performance of Unix-like system. test-url: https://github.com/kdlucas/byte-unixbench Details are as below: ========================================================================================= compiler/cpufreq_governor/kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase: gcc-11/performance/x86_64-rhel-8.3/1/debian-11.1-x86_64-20220510.cgz/300s/lkp-icl-2sp2/shell8/unixbench commit: 9cd6ffa602 ("selftests/damon: add tests for DAMON_LRU_SORT's enabled parameter") f1a7941243 ("mm: convert mm's rss stats into percpu_counter") 9cd6ffa60256e931 f1a7941243c102a44e8847e3b94 ---------------- --------------------------- %stddev %change %stddev \ | \ 7917 -5.1% 7509 unixbench.score 10485 -12.1% 9216 unixbench.time.maximum_resident_set_size 37236706 -5.1% 35324104 unixbench.time.minor_page_faults 567.67 -1.3% 560.50 unixbench.time.percent_of_cpu_this_job_got 215.51 +3.7% 223.41 unixbench.time.system_time 143.81 -8.0% 132.23 unixbench.time.user_time 1075861 -4.0% 1033025 unixbench.time.voluntary_context_switches 299268 -4.9% 284627 unixbench.workload 13368320 ± 7% +18.1% 15788032 ± 6% meminfo.DirectMap2M 44104 -3.2% 42701 vmstat.system.cs 0.98 ± 20% +0.7 1.64 ± 38% perf-profile.calltrace.cycles-pp.link_path_walk.path_openat.do_filp_open.do_sys_openat2.__x64_sys_openat 2.12 ± 19% +0.8 2.96 ± 13% perf-profile.calltrace.cycles-pp.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault 2.35 ± 13% +0.9 3.28 ± 13% perf-profile.calltrace.cycles-pp.__handle_mm_fault.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault 0.14 ± 74% +0.4 0.55 ± 32% perf-profile.children.cycles-pp.do_task_dead 0.04 ±223% +0.4 0.47 ± 49% perf-profile.children.cycles-pp.__mmdrop 25909747 -5.1% 24594282 proc-vmstat.numa_hit 25735224 -5.1% 24419554 proc-vmstat.numa_local 46218815 -5.1% 43858849 proc-vmstat.pgalloc_normal 37577543 -5.1% 35663315 proc-vmstat.pgfault 46035593 -5.1% 43669821 proc-vmstat.pgfree 1592335 -3.9% 1529709 proc-vmstat.pgreuse 38041 -5.1% 36089 proc-vmstat.thp_fault_alloc 532220 -5.1% 504893 proc-vmstat.unevictable_pgs_culled 11.43 +7.9% 12.34 perf-stat.i.MPKI 4.415e+09 -3.2% 4.272e+09 perf-stat.i.branch-instructions 1.71 -0.0 1.67 perf-stat.i.branch-miss-rate% 74672466 -5.3% 70687323 perf-stat.i.branch-misses 14.90 +1.3 16.18 perf-stat.i.cache-miss-rate% 38201955 +14.5% 43725695 perf-stat.i.cache-misses 2.517e+08 +5.0% 2.644e+08 perf-stat.i.cache-references 46317 -3.8% 44553 perf-stat.i.context-switches 0.94 +1.7% 0.96 perf-stat.i.cpi 2.032e+10 -1.5% 2.002e+10 perf-stat.i.cpu-cycles 2760 -6.3% 2585 perf-stat.i.cpu-migrations 0.05 +0.0 0.07 ± 34% perf-stat.i.dTLB-load-miss-rate% 2687620 +37.3% 3690868 ± 35% perf-stat.i.dTLB-load-misses 5.592e+09 -3.0% 5.422e+09 perf-stat.i.dTLB-loads 0.09 +0.0 0.09 ± 8% perf-stat.i.dTLB-store-miss-rate% 3.295e+09 -3.6% 3.175e+09 perf-stat.i.dTLB-stores 2.162e+10 -2.9% 2.1e+10 perf-stat.i.instructions 1.06 -1.5% 1.05 perf-stat.i.ipc 0.16 -1.5% 0.16 perf-stat.i.metric.GHz 188.29 +21.3% 228.40 perf-stat.i.metric.K/sec 105.85 -3.1% 102.57 perf-stat.i.metric.M/sec 580192 -5.4% 548596 perf-stat.i.minor-faults 7332887 +14.4% 8388008 perf-stat.i.node-load-misses 197858 +2.4% 202553 perf-stat.i.node-loads 77.77 +4.8 82.56 perf-stat.i.node-store-miss-rate% 8653164 +45.4% 12581116 perf-stat.i.node-store-misses 2454964 +5.3% 2585143 perf-stat.i.node-stores 580247 -5.4% 548650 perf-stat.i.page-faults 11.64 +8.1% 12.59 perf-stat.overall.MPKI 1.69 -0.0 1.65 perf-stat.overall.branch-miss-rate% 15.18 +1.4 16.54 perf-stat.overall.cache-miss-rate% 0.94 +1.4% 0.95 perf-stat.overall.cpi 531.91 -13.9% 457.79 perf-stat.overall.cycles-between-cache-misses 0.05 +0.0 0.07 ± 34% perf-stat.overall.dTLB-load-miss-rate% 0.09 +0.0 0.10 ± 8% perf-stat.overall.dTLB-store-miss-rate% 1.06 -1.4% 1.05 perf-stat.overall.ipc 77.90 +5.1 82.95 perf-stat.overall.node-store-miss-rate% 4574083 +2.5% 4688385 perf-stat.overall.path-length 4.344e+09 -3.2% 4.203e+09 perf-stat.ps.branch-instructions 73479648 -5.3% 69558968 perf-stat.ps.branch-misses 37586020 +14.5% 43024951 perf-stat.ps.cache-misses 2.477e+08 +5.0% 2.601e+08 perf-stat.ps.cache-references 45573 -3.8% 43840 perf-stat.ps.context-switches 1.999e+10 -1.5% 1.97e+10 perf-stat.ps.cpu-cycles 2715 -6.3% 2543 perf-stat.ps.cpu-migrations 2644325 +37.3% 3631630 ± 35% perf-stat.ps.dTLB-load-misses 5.502e+09 -3.0% 5.336e+09 perf-stat.ps.dTLB-loads 3.242e+09 -3.6% 3.124e+09 perf-stat.ps.dTLB-stores 2.127e+10 -2.9% 2.066e+10 perf-stat.ps.instructions 570836 -5.4% 539805 perf-stat.ps.minor-faults 7214650 +14.4% 8253560 perf-stat.ps.node-load-misses 194668 +2.4% 199305 perf-stat.ps.node-loads 8513681 +45.4% 12379540 perf-stat.ps.node-store-misses 2415376 +5.3% 2543709 perf-stat.ps.node-stores 570889 -5.4% 539858 perf-stat.ps.page-faults 1.369e+12 -2.5% 1.334e+12 perf-stat.total.instructions If you fix the issue, kindly add following tag | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-lkp/202212051324.182a6363-yujie.liu@intel.com To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests sudo bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run sudo bin/lkp run generated-yaml-file # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. 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. -- 0-DAY CI Kernel Test Service https://01.org/lkp