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X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 18.9% improvement of stress-ng.mmaprandom.ops_per_sec on: commit: 14a857056466be9d3d907a94e92a704ac1be149b ("sched/deadline: Use revised wakeup rule for dl_server") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master testcase: stress-ng config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 192 threads 2 sockets Intel(R) Xeon(R) 6740E CPU @ 2.4GHz (Sierra Forest) with 256G memory parameters: nr_threads: 100% testtime: 60s test: mmaprandom cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260710/202607101604.5b29f080-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: gcc-14/performance/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-srf-2sp2/mmaprandom/stress-ng/60s commit: v7.0-rc7 sched-urgent-2026-04-12 v7.0-rc7 sched-urgent-2026-04-12 ---------------- --------------------------- %stddev %change %stddev \ | \ 7.42 ± 6% +13.7% 8.44 ± 4% stress-ng.mmaprandom.munmap_lo/hi_addr_ops/sec 3.268e+08 ± 3% +18.8% 3.884e+08 ± 3% stress-ng.mmaprandom.ops 5266977 ± 3% +18.9% 6261751 ± 3% stress-ng.mmaprandom.ops_per_sec 502294 ± 4% +18.9% 597382 ± 5% stress-ng.time.involuntary_context_switches 42134946 ± 4% +15.8% 48772691 ± 3% stress-ng.time.minor_page_faults 11559 ± 2% +23.9% 14321 stress-ng.time.percent_of_cpu_this_job_got 7227 +23.2% 8905 stress-ng.time.system_time 1834057 ± 3% +18.6% 2175623 ± 3% stress-ng.time.voluntary_context_switches 109.70 ± 52% +161.8% 287.20 ± 30% perf-c2c.DRAM.local 10.88 ± 12% -24.7% 8.19 ± 11% perf-sched.wait_time.max.ms.perf_trace_sched_switch.exit_to_user_mode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe.shmdt 5.149e+09 ± 4% -33.2% 3.441e+09 ± 16% cpuidle..time 3590818 ± 4% +13.6% 4079292 ± 2% cpuidle..usage 89858 ± 4% +12.6% 101156 ± 3% perf-stat.i.context-switches 78474 ± 4% +19.4% 93707 ± 4% perf-stat.ps.context-switches 40.88 ± 3% -18.9 21.97 ± 51% turbostat.C1% 40.77 ± 3% -46.5% 21.83 ± 51% turbostat.CPU%c1 41.69 ± 2% -32.1% 28.32 ± 10% vmstat.cpu.id 114.21 ± 3% +17.4% 134.07 ± 5% vmstat.procs.r 75991 ± 4% +17.6% 89367 ± 4% vmstat.system.cs 931.70 ± 15% -21.5% 731.03 ± 6% meminfo.Inactive 931.70 ± 15% -21.5% 731.03 ± 6% meminfo.Inactive(file) 3323 ± 17% -92.7% 241.56 ± 41% meminfo.ShmemHugePages 3167 ± 17% -93.0% 223.03 ± 46% meminfo.ShmemPmdMapped 1958 ± 28% -94.4% 109.27 ± 64% numa-meminfo.node0.ShmemHugePages 1883 ± 27% -95.2% 90.32 ± 80% numa-meminfo.node0.ShmemPmdMapped 1464 ± 25% -90.2% 143.09 ± 73% numa-meminfo.node1.ShmemHugePages 1380 ± 26% -90.7% 127.76 ± 65% numa-meminfo.node1.ShmemPmdMapped 29299405 ± 3% +16.7% 34179169 ± 3% numa-numastat.node0.local_node 29397753 ± 3% +16.7% 34300051 ± 3% numa-numastat.node0.numa_hit 29074958 ± 3% +17.0% 34029990 ± 3% numa-numastat.node1.local_node 29175702 ± 3% +16.9% 34110422 ± 3% numa-numastat.node1.numa_hit 29398448 ± 3% +16.7% 34299565 ± 3% numa-vmstat.node0.numa_hit 29300100 ± 3% +16.7% 34178683 ± 3% numa-vmstat.node0.numa_local 29175972 ± 3% +16.9% 34110183 ± 3% numa-vmstat.node1.numa_hit 29075150 ± 3% +17.0% 34029751 ± 3% numa-vmstat.node1.numa_local 40.14 ± 2% -14.1 26.05 ± 11% mpstat.cpu.all.idle% 0.33 ± 4% +0.1 0.39 ± 6% mpstat.cpu.all.irq% 0.26 ± 6% +0.1 0.32 ± 3% mpstat.cpu.all.soft% 57.71 ± 2% +13.8 71.52 ± 4% mpstat.cpu.all.sys% 87.62 ± 6% +12.6% 98.66 mpstat.max_utilization_pct 22227 +17.6% 26146 sched_debug.cfs_rq:/.avg_vruntime.avg 82637 ± 12% -26.0% 61123 ± 15% sched_debug.cfs_rq:/.avg_vruntime.max 18397 +16.4% 21416 ± 5% sched_debug.cfs_rq:/.avg_vruntime.min 6674 ± 7% -26.8% 4887 ± 8% sched_debug.cfs_rq:/.avg_vruntime.stddev 829.95 ± 16% +37.0% 1136 ± 9% sched_debug.cfs_rq:/.util_est.max 22226 +17.6% 26146 sched_debug.cfs_rq:/.zero_vruntime.avg 82637 ± 12% -26.0% 61123 ± 15% sched_debug.cfs_rq:/.zero_vruntime.max 18397 +16.4% 21416 ± 5% sched_debug.cfs_rq:/.zero_vruntime.min 6674 ± 7% -26.8% 4887 ± 8% sched_debug.cfs_rq:/.zero_vruntime.stddev 142314 ± 12% +56.2% 222249 ± 11% sched_debug.cpu.avg_idle.stddev 14910 ± 3% +15.0% 17153 ± 2% sched_debug.cpu.nr_switches.avg 58577011 ± 3% +16.8% 68413496 ± 3% proc-vmstat.numa_hit 58377918 ± 3% +16.8% 68212181 ± 3% proc-vmstat.numa_local 3081605 ± 2% +19.3% 3677408 ± 3% proc-vmstat.pgactivate 69802610 ± 3% +17.2% 81798112 ± 3% proc-vmstat.pgalloc_normal 6196217 ± 2% +19.9% 7429815 ± 3% proc-vmstat.pgdeactivate 42798950 ± 4% +15.5% 49451147 ± 3% proc-vmstat.pgfault 68727309 ± 3% +17.4% 80696135 ± 3% proc-vmstat.pgfree 627355 ± 3% +19.7% 750783 ± 3% proc-vmstat.pglazyfree 4638 ± 3% +20.0% 5565 ± 4% proc-vmstat.thp_collapse_alloc 15260 ± 2% +19.2% 18197 ± 3% proc-vmstat.thp_fault_alloc 2729 ± 3% +20.6% 3292 ± 4% proc-vmstat.thp_file_mapped 1214 ± 3% +20.9% 1468 ± 3% proc-vmstat.thp_split_page 1214 ± 3% +20.9% 1468 ± 3% proc-vmstat.thp_swpout_fallback 38553874 ± 3% +18.6% 45724835 ± 3% proc-vmstat.unevictable_pgs_culled 38620357 ± 3% +18.6% 45806796 ± 3% proc-vmstat.unevictable_pgs_mlocked 37844607 ± 3% +18.6% 44877490 ± 3% proc-vmstat.unevictable_pgs_munlocked 37775054 ± 3% +18.6% 44792535 ± 3% proc-vmstat.unevictable_pgs_rescued 775098 ± 4% +19.8% 928721 ± 4% proc-vmstat.unevictable_pgs_stranded 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://github.com/intel/lkp-tests/wiki