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X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: kXeAbXCBQT3DwtYqXMC/IS8GS46EJ+whFdVbvrckc9UBYIZ43J3AzcMuwACck3Zm/2pU3eD+W+MeDm9IAzuGow== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR11MB4958 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 4.7% improvement of stress-ng.enosys.ops_per_sec on: commit: 89951fc1f8201df27366ac1eed1ddc9ee0f47729 ("sched: Reorder some fields in struct rq") 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: 256 threads 4 sockets INTEL(R) XEON(R) PLATINUM 8592+ (Emerald Rapids) with 256G memory parameters: nr_threads: 100% testtime: 60s test: enosys cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260226/202602261519.645f013d-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-emr-2sp1/enosys/stress-ng/60s commit: 55b39b0cf1 ("sched/fair: Use cpumask_weight_and() in sched_balance_find_dst_group()") 89951fc1f8 ("sched: Reorder some fields in struct rq") 55b39b0cf183b9c6 89951fc1f8201df27366ac1eed1 ---------------- --------------------------- %stddev %change %stddev \ | \ 8.757e+08 +4.7% 9.169e+08 stress-ng.enosys.ops 14602390 +4.7% 15290136 stress-ng.enosys.ops_per_sec 114078 +4.7% 119451 stress-ng.enosys.syscalls_per_second 3314145 +4.6% 3466972 stress-ng.time.minor_page_faults 8699 -1.4% 8575 stress-ng.time.system_time 1649 +4.8% 1728 stress-ng.time.user_time 1.661e+09 +5.0% 1.744e+09 stress-ng.time.voluntary_context_switches 9.917e+08 +6.4% 1.055e+09 cpuidle..usage 44556222 +3.9% 46298755 vmstat.system.cs 1.05 -0.0 1.00 turbostat.C1E% 0.56 +4.7% 0.58 turbostat.IPC 2.20 +0.4 2.56 ± 2% turbostat.POLL% 7.024e+10 +4.2% 7.32e+10 perf-stat.i.branch-instructions 5.411e+08 +3.7% 5.613e+08 perf-stat.i.branch-misses 27.00 +3.6 30.63 perf-stat.i.cache-miss-rate% 1.393e+09 +4.5% 1.456e+09 perf-stat.i.cache-misses 5.185e+09 -8.1% 4.764e+09 perf-stat.i.cache-references 46807212 +4.5% 48921785 perf-stat.i.context-switches 1.92 -4.3% 1.83 perf-stat.i.cpi 12283691 +5.4% 12944082 perf-stat.i.cpu-migrations 466.69 -4.3% 446.75 perf-stat.i.cycles-between-cache-misses 3.489e+11 +4.3% 3.639e+11 perf-stat.i.instructions 0.54 +4.2% 0.57 perf-stat.i.ipc 230.75 +4.7% 241.60 perf-stat.i.metric.K/sec 26.88 +3.7 30.56 perf-stat.overall.cache-miss-rate% 1.85 -4.2% 1.77 perf-stat.overall.cpi 462.88 -4.3% 442.84 perf-stat.overall.cycles-between-cache-misses 0.54 +4.3% 0.56 perf-stat.overall.ipc 6.91e+10 +4.2% 7.201e+10 perf-stat.ps.branch-instructions 5.32e+08 +3.7% 5.518e+08 perf-stat.ps.branch-misses 1.37e+09 +4.5% 1.431e+09 perf-stat.ps.cache-misses 5.098e+09 -8.1% 4.684e+09 perf-stat.ps.cache-references 46015345 +4.5% 48090269 perf-stat.ps.context-switches 12075501 +5.4% 12723669 perf-stat.ps.cpu-migrations 3.432e+11 +4.3% 3.579e+11 perf-stat.ps.instructions 2.085e+13 +4.7% 2.183e+13 perf-stat.total.instructions 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