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46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: mhelYacDpAY9b8fZeYLHx0/jOM1vN3MKZ+C0PNSzOsXeJKQU83aolyWrXIY3H67t7yZf1j/78OYTbvtd9HYV1A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH3PPFF2B8F6C64 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 5.5% improvement of stress-ng.timer.ops_per_sec on: commit: 9f6ffd4cebda86841700775de3213f22bb0ea22d ("rseq: Separate the signal delivery path") https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git core/rseq 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: timer cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251111/202511111524.d2e6b63d-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-2sp3/timer/stress-ng/60s commit: 0f085b4188 ("rseq: Provide and use rseq_set_ids()") 9f6ffd4ceb ("rseq: Separate the signal delivery path") 0f085b41880e3140 9f6ffd4cebda86841700775de32 ---------------- --------------------------- %stddev %change %stddev \ | \ 147208 ± 3% +15.8% 170452 ± 4% meminfo.Mapped 50.63 +34.3 84.92 mpstat.cpu.all.sys% 36.46 -34.8 1.67 ± 13% mpstat.cpu.all.usr% 14932 ± 35% +67.9% 25072 ± 15% numa-vmstat.node0.nr_slab_reclaimable 22290 ± 24% -45.5% 12149 ± 32% numa-vmstat.node1.nr_slab_reclaimable 10.17 ± 44% +375.4% 48.33 ± 9% perf-c2c.DRAM.local 162.67 ± 31% +558.7% 1071 ± 12% perf-c2c.DRAM.remote 141.00 ± 29% +578.6% 956.83 ± 12% perf-c2c.HITM.local 154.50 ± 32% +476.2% 890.17 ± 13% perf-c2c.HITM.remote 37215 ± 3% +15.2% 42879 ± 5% proc-vmstat.nr_mapped 66948 +8.7% 72780 proc-vmstat.nr_shmem 818668 +2.7% 840430 proc-vmstat.numa_hit 620609 +3.5% 642526 proc-vmstat.numa_local 59728 ± 35% +67.9% 100287 ± 15% numa-meminfo.node0.KReclaimable 59728 ± 35% +67.9% 100287 ± 15% numa-meminfo.node0.SReclaimable 304140 ± 8% +16.4% 353946 ± 7% numa-meminfo.node0.Slab 89141 ± 24% -45.5% 48551 ± 32% numa-meminfo.node1.KReclaimable 89141 ± 24% -45.5% 48551 ± 32% numa-meminfo.node1.SReclaimable 47698 ± 2% +16.6% 55634 stress-ng.time.involuntary_context_switches 5931 +67.8% 9952 stress-ng.time.system_time 4259 -95.8% 179.67 ± 14% stress-ng.time.user_time 5.054e+09 +5.5% 5.335e+09 stress-ng.timer.ops 84269084 +5.5% 88943393 stress-ng.timer.ops_per_sec 0.05 ± 4% -14.9% 0.04 ± 2% perf-sched.sch_delay.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 0.05 ± 4% -14.9% 0.04 ± 2% perf-sched.total_sch_delay.average.ms 159.90 ± 2% -15.6% 135.02 perf-sched.total_wait_and_delay.average.ms 7663 ± 2% +18.3% 9069 ± 2% perf-sched.total_wait_and_delay.count.ms 159.86 ± 2% -15.6% 134.98 perf-sched.total_wait_time.average.ms 159.90 ± 2% -15.6% 135.02 perf-sched.wait_and_delay.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 7663 ± 2% +18.3% 9069 ± 2% perf-sched.wait_and_delay.count.[unknown].[unknown].[unknown].[unknown].[unknown] 159.86 ± 2% -15.6% 134.98 perf-sched.wait_time.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 6.55e+10 +3.2% 6.757e+10 perf-stat.i.branch-instructions 92397918 +6.4% 98318472 ± 2% perf-stat.i.branch-misses 6980157 +3.0% 7189854 perf-stat.i.cache-references 1977 ± 2% +12.2% 2219 perf-stat.i.context-switches 1.76 -2.6% 1.71 perf-stat.i.cpi 301.54 -2.7% 293.44 perf-stat.i.cpu-migrations 3.435e+11 +2.6% 3.526e+11 perf-stat.i.instructions 0.57 +2.7% 0.58 perf-stat.i.ipc 1.76 -2.6% 1.71 perf-stat.overall.cpi 0.57 +2.7% 0.58 perf-stat.overall.ipc 6.443e+10 +3.2% 6.647e+10 perf-stat.ps.branch-instructions 90890135 +6.4% 96717754 ± 2% perf-stat.ps.branch-misses 6864424 +3.0% 7069354 perf-stat.ps.cache-references 1945 ± 2% +12.2% 2183 perf-stat.ps.context-switches 296.64 -2.7% 288.77 perf-stat.ps.cpu-migrations 3.379e+11 +2.7% 3.469e+11 perf-stat.ps.instructions 2.077e+13 +2.7% 2.133e+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