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46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: YWFAUHMf6qwiu8XJwoEhx1/lLR7NrDHnLQGvpabebcaEUb6vDeyHI7yt7jWrgLhtlmo+vpg6VdylfbOacmutxw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB4568 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 3807.5% improvement of stress-ng.chmod.ops_per_sec on: commit: c91d38b57f2c4784d885c874b2a1234a01361afd ("xfs: rework datasync tracking and execution") 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: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory parameters: nr_threads: 100% disk: 1HDD testtime: 60s fs: xfs test: chmod cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251107/202511071447.b5bd3ddf-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: gcc-14/performance/1HDD/xfs/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-icl-2sp8/chmod/stress-ng/60s commit: bc7d684fea ("xfs: rearrange code in xfs_inode_item_precommit") c91d38b57f ("xfs: rework datasync tracking and execution") bc7d684fea18cc48 c91d38b57f2c4784d885c874b2a ---------------- --------------------------- %stddev %change %stddev \ | \ 6943 ± 2% -31.3% 4767 uptime.idle 3.968e+09 -19.6% 3.191e+09 cpuidle..time 267038 ± 6% +228.0% 875840 ± 6% cpuidle..usage 202471 ± 87% +110.4% 425943 ± 53% numa-meminfo.node1.Active 202464 ± 87% +110.4% 425935 ± 53% numa-meminfo.node1.Active(anon) 11019 ± 11% +614.5% 78736 ± 19% numa-meminfo.node1.Shmem 50689 ± 87% +110.2% 106536 ± 53% numa-vmstat.node1.nr_active_anon 2736 ± 11% +620.7% 19718 ± 19% numa-vmstat.node1.nr_shmem 50689 ± 87% +110.2% 106536 ± 53% numa-vmstat.node1.nr_zone_active_anon 98.29 -47.8% 51.30 ± 2% iostat.cpu.idle 0.01 ± 34% +4.4e+05% 29.80 iostat.cpu.iowait 0.86 ± 8% +1983.4% 17.82 ± 6% iostat.cpu.system 0.84 ± 13% +27.9% 1.08 ± 2% iostat.cpu.user 678151 +10.8% 751607 meminfo.Active 678134 +10.8% 751591 meminfo.Active(anon) 74229 ± 4% -10.1% 66725 ± 3% meminfo.AnonHugePages 16590 ± 5% +432.3% 88307 ± 14% meminfo.Shmem 15.83 ± 23% +1103.2% 190.50 ± 8% perf-c2c.DRAM.local 358.00 ± 30% +3312.1% 12215 ± 7% perf-c2c.DRAM.remote 321.17 ± 32% +2900.4% 9636 ± 7% perf-c2c.HITM.local 241.00 ± 30% +3726.9% 9222 ± 7% perf-c2c.HITM.remote 562.17 ± 31% +3254.7% 18859 ± 7% perf-c2c.HITM.total 1225 ± 14% +3762.4% 47314 ± 4% stress-ng.chmod.ops 20.17 ± 15% +3807.5% 788.15 ± 4% stress-ng.chmod.ops_per_sec 146.50 ± 11% +752.3% 1248 ± 4% stress-ng.time.involuntary_context_switches 11984 +20.8% 14481 stress-ng.time.minor_page_faults 34.17 ± 16% +3293.2% 1159 ± 6% stress-ng.time.percent_of_cpu_this_job_got 21.27 ± 15% +3173.1% 696.14 ± 6% stress-ng.time.system_time 62731 ± 16% +1072.8% 735741 ± 9% stress-ng.time.voluntary_context_switches 98.30 -48.5 49.84 ± 2% mpstat.cpu.all.idle% 0.00 ±105% +30.7 30.72 mpstat.cpu.all.iowait% 0.02 ± 8% +0.1 0.09 ± 6% mpstat.cpu.all.irq% 0.01 ± 18% +0.0 0.02 ± 5% mpstat.cpu.all.soft% 0.83 ± 9% +17.4 18.24 ± 6% mpstat.cpu.all.sys% 0.85 ± 14% +0.2 1.09 ± 2% mpstat.cpu.all.usr% 1.00 +4033.3% 41.33 ± 33% mpstat.max_utilization.seconds 6.13 ± 6% +333.0% 26.54 ± 4% mpstat.max_utilization_pct 65.17 ± 11% +969.1% 696.67 ± 6% turbostat.Avg_MHz 1.81 ± 11% +17.6 19.39 ± 6% turbostat.Busy% 98.22 -17.5 80.69 turbostat.C1% 96.82 -25.6% 72.07 turbostat.CPU%c1 0.72 ± 4% -55.4% 0.32 ± 2% turbostat.IPC 372011 ± 8% +706.5% 3000169 ± 5% turbostat.IRQ 23024 ± 30% +2629.0% 628341 ± 6% turbostat.NMI 243.27 +9.4% 266.04 turbostat.PkgWatt 15.14 +2.9% 15.57 turbostat.RAMWatt 225.26 ± 17% -92.7% 16.48 ± 9% perf-sched.total_wait_and_delay.average.ms 4552 ± 19% +1482.3% 72026 ± 10% perf-sched.total_wait_and_delay.count.ms 4996 -22.0% 3898 ± 10% perf-sched.total_wait_and_delay.max.ms 225.25 ± 17% -92.7% 16.46 ± 9% perf-sched.total_wait_time.average.ms 4996 -22.0% 3898 ± 10% perf-sched.total_wait_time.max.ms 225.26 ± 17% -92.7% 16.48 ± 9% perf-sched.wait_and_delay.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 4552 ± 19% +1482.3% 72026 ± 10% perf-sched.wait_and_delay.count.[unknown].[unknown].[unknown].[unknown].[unknown] 4996 -22.0% 3898 ± 10% perf-sched.wait_and_delay.max.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 225.25 ± 17% -92.7% 16.46 ± 9% perf-sched.wait_time.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 4996 -22.0% 3898 ± 10% perf-sched.wait_time.max.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 169578 +10.8% 187927 proc-vmstat.nr_active_anon 935816 +1.9% 953408 proc-vmstat.nr_file_pages 20878 +4.0% 21711 proc-vmstat.nr_mapped 4142 ± 5% +433.8% 22109 ± 14% proc-vmstat.nr_shmem 41118 +1.0% 41531 proc-vmstat.nr_slab_unreclaimable 169578 +10.8% 187927 proc-vmstat.nr_zone_active_anon 615.17 ±218% +464.4% 3472 ± 14% proc-vmstat.numa_hint_faults_local 345828 ± 4% +10.1% 380782 ± 2% proc-vmstat.numa_hit 279652 ± 5% +12.5% 314600 ± 3% proc-vmstat.numa_local 60782 ± 60% +78.2% 108287 ± 14% proc-vmstat.numa_pte_updates 382421 ± 4% +9.6% 419096 ± 2% proc-vmstat.pgalloc_normal 5338 ± 20% +193.0% 15639 ± 6% proc-vmstat.pgpgout 7731 ± 7% +1078.0% 91080 ± 10% sched_debug.cfs_rq:/.avg_vruntime.avg 61046 ± 13% +183.6% 173149 ± 14% sched_debug.cfs_rq:/.avg_vruntime.max 747.60 ± 23% +3826.2% 29352 ± 13% sched_debug.cfs_rq:/.avg_vruntime.min 10401 ± 7% +72.6% 17954 ± 9% sched_debug.cfs_rq:/.avg_vruntime.stddev 564880 ± 44% -71.2% 162663 ±113% sched_debug.cfs_rq:/.load.max 79058 ± 37% -64.4% 28177 ± 90% sched_debug.cfs_rq:/.load.stddev 7731 ± 7% +1078.0% 91080 ± 10% sched_debug.cfs_rq:/.min_vruntime.avg 61046 ± 13% +183.6% 173149 ± 14% sched_debug.cfs_rq:/.min_vruntime.max 747.60 ± 23% +3826.2% 29352 ± 13% sched_debug.cfs_rq:/.min_vruntime.min 10401 ± 7% +72.6% 17954 ± 9% sched_debug.cfs_rq:/.min_vruntime.stddev 254.61 ± 6% +23.3% 313.88 ± 6% sched_debug.cfs_rq:/.runnable_avg.avg 254.13 ± 6% +23.4% 313.61 ± 6% sched_debug.cfs_rq:/.util_avg.avg 1388025 ± 3% -8.9% 1264183 ± 4% sched_debug.cpu.avg_idle.avg 4207 ± 7% +257.6% 15044 ± 6% sched_debug.cpu.nr_switches.avg 13511 ± 20% +276.6% 50888 ± 62% sched_debug.cpu.nr_switches.max 1440 ± 9% +592.5% 9975 ± 4% sched_debug.cpu.nr_switches.min 2591 ± 14% +129.9% 5958 ± 61% sched_debug.cpu.nr_switches.stddev 19.42 ± 31% +137.8% 46.17 ± 17% sched_debug.cpu.nr_uninterruptible.max -14.67 +891.5% -145.42 sched_debug.cpu.nr_uninterruptible.min 4.79 ± 10% +353.6% 21.71 ± 15% sched_debug.cpu.nr_uninterruptible.stddev 0.94 ± 5% -30.7% 0.65 ± 2% perf-stat.i.MPKI 6.179e+08 ± 12% +373.6% 2.927e+09 ± 4% perf-stat.i.branch-instructions 3.29 ± 11% -1.8 1.47 ± 8% perf-stat.i.branch-miss-rate% 43227294 ± 15% +20.8% 52203685 ± 3% perf-stat.i.branch-misses 17.76 ± 6% +19.1 36.85 perf-stat.i.cache-miss-rate% 1306832 ± 11% +601.7% 9169533 ± 4% perf-stat.i.cache-misses 8673239 ± 10% +206.9% 26621069 ± 3% perf-stat.i.cache-references 3772 ± 10% +618.3% 27098 ± 8% perf-stat.i.context-switches 2.43 ± 4% +32.5% 3.23 perf-stat.i.cpi 4.243e+09 ± 11% +964.2% 4.515e+10 ± 6% perf-stat.i.cpu-cycles 116.32 ± 2% +203.4% 352.94 ± 3% perf-stat.i.cpu-migrations 3133 ± 3% +59.5% 4996 ± 2% perf-stat.i.cycles-between-cache-misses 3.037e+09 ± 12% +376.7% 1.448e+10 ± 4% perf-stat.i.instructions 0.55 ± 4% -40.3% 0.33 ± 2% perf-stat.i.ipc 0.43 ± 4% +46.9% 0.63 ± 2% perf-stat.overall.MPKI 6.97 ± 3% -5.2 1.79 ± 7% perf-stat.overall.branch-miss-rate% 15.06 ± 4% +19.3 34.39 perf-stat.overall.cache-miss-rate% 1.40 ± 3% +122.3% 3.12 perf-stat.overall.cpi 3252 ± 2% +51.3% 4921 ± 3% perf-stat.overall.cycles-between-cache-misses 0.71 ± 3% -55.1% 0.32 perf-stat.overall.ipc 6.093e+08 ± 12% +372.7% 2.88e+09 ± 4% perf-stat.ps.branch-instructions 42634564 ± 15% +20.7% 51439404 ± 3% perf-stat.ps.branch-misses 1287683 ± 11% +600.7% 9022871 ± 4% perf-stat.ps.cache-misses 8556164 ± 10% +206.5% 26227629 ± 3% perf-stat.ps.cache-references 3710 ± 10% +618.7% 26664 ± 8% perf-stat.ps.context-switches 4.185e+09 ± 11% +961.5% 4.442e+10 ± 6% perf-stat.ps.cpu-cycles 114.49 ± 2% +203.8% 347.78 ± 3% perf-stat.ps.cpu-migrations 2.995e+09 ± 12% +375.7% 1.425e+10 ± 4% perf-stat.ps.instructions 1.865e+11 ± 12% +369.7% 8.759e+11 ± 4% 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