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LV3PR11MB8603.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Feb 2026 03:05:13.1544 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: +rJEyZFIy1ATYUiNAw4dn31Ot3QV6pUXUY+NI4eh61X4tI2EzEfgP4q3pxRXzhuwNPmztlavM5I8AovunXGp/Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR11MB6864 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 16.9% regression of stress-ng.sysbadaddr.ops_per_sec on: commit: 115135422562e2f791e98a6f55ec57b2da3b3a95 ("sched/deadline: Fix 'stuck' dl_server") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [still regression on linus/master e7aa57247700733e52a8e2e4dee6a52c2a76de02] [still regression on linux-next/master 9845cf73f7db6094c0d8419d6adb848028f4a921] testcase: stress-ng config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory parameters: nr_threads: 100% testtime: 60s test: sysbadaddr cpufreq_governor: performance If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202602101005.d6ed888c-lkp@intel.com Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260210/202602101005.d6ed888c-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-spr-r02/sysbadaddr/stress-ng/60s commit: v6.19-rc7 1151354225 ("sched/deadline: Fix 'stuck' dl_server") v6.19-rc7 115135422562e2f791e98a6f55e ---------------- --------------------------- %stddev %change %stddev \ | \ 89928 ± 7% -15.9% 75673 ± 11% numa-meminfo.node0.PageTables 1.052e+10 +5.4% 1.109e+10 cpuidle..time 20439789 -15.1% 17344810 cpuidle..usage 272197 +8.0% 293980 ± 2% meminfo.Mapped 171599 ± 3% -8.4% 157102 ± 3% meminfo.PageTables 56.50 ± 7% -16.0% 47.45 ± 9% vmstat.procs.r 402557 -20.4% 320282 vmstat.system.cs 570332 -19.2% 461095 ± 2% vmstat.system.in 0.55 -0.1 0.47 mpstat.cpu.all.irq% 0.35 -0.1 0.30 ± 2% mpstat.cpu.all.soft% 21.37 -3.2 18.20 ± 2% mpstat.cpu.all.sys% 1.19 -0.1 1.08 mpstat.cpu.all.usr% 47574572 ± 3% -15.1% 40407618 numa-numastat.node0.local_node 47713303 ± 3% -15.1% 40509520 numa-numastat.node0.numa_hit 46372877 ± 2% -15.6% 39140423 ± 3% numa-numastat.node1.local_node 46483726 ± 2% -15.5% 39282616 ± 3% numa-numastat.node1.numa_hit 22589 ± 7% -16.4% 18874 ± 11% numa-vmstat.node0.nr_page_table_pages 47714521 ± 3% -15.1% 40508990 numa-vmstat.node0.numa_hit 47575808 ± 3% -15.1% 40407088 numa-vmstat.node0.numa_local 46484027 ± 2% -15.5% 39282306 ± 3% numa-vmstat.node1.numa_hit 46373132 ± 2% -15.6% 39140113 ± 3% numa-vmstat.node1.numa_local 10441 ± 5% -49.8% 5240 ± 38% perf-c2c.DRAM.local 27988 -77.6% 6255 ± 89% perf-c2c.DRAM.remote 30307 -77.7% 6760 ± 89% perf-c2c.HITM.local 20500 -77.8% 4551 ± 91% perf-c2c.HITM.remote 50808 -77.7% 11311 ± 90% perf-c2c.HITM.total 11382479 -16.8% 9471558 ± 2% stress-ng.sysbadaddr.ops 189863 -16.9% 157870 ± 2% stress-ng.sysbadaddr.ops_per_sec 730453 -20.2% 583015 ± 2% stress-ng.time.involuntary_context_switches 1.462e+08 -16.4% 1.222e+08 ± 3% stress-ng.time.minor_page_faults 5002 -15.5% 4226 ± 2% stress-ng.time.percent_of_cpu_this_job_got 2450 -14.3% 2100 ± 2% stress-ng.time.system_time 558.73 -17.9% 458.84 ± 2% stress-ng.time.user_time 7545032 -19.3% 6088160 stress-ng.time.voluntary_context_switches 702.00 -15.4% 593.67 ± 2% turbostat.Avg_MHz 24.26 -3.8 20.46 ± 2% turbostat.Busy% 54.46 -8.2 46.28 turbostat.C1E% 21.40 +11.9 33.35 ± 3% turbostat.C6% 2.13 ± 5% +419.1% 11.07 ± 10% turbostat.CPU%c6 41047137 -18.9% 33275561 turbostat.IRQ 2895550 -26.4% 2130628 ± 13% turbostat.NMI 476.92 -4.9% 453.72 turbostat.PkgWatt 33.86 -8.1% 31.12 turbostat.RAMWatt 1261819 -1.0% 1249785 proc-vmstat.nr_file_pages 57044 -3.0% 55319 proc-vmstat.nr_kernel_stack 68078 +8.0% 73522 ± 2% proc-vmstat.nr_mapped 16.31 ± 35% +541.9% 104.69 ± 23% proc-vmstat.nr_mlock 42826 ± 3% -8.7% 39120 ± 3% proc-vmstat.nr_page_table_pages 336366 -3.6% 324322 proc-vmstat.nr_shmem 137143 -1.7% 134832 proc-vmstat.nr_slab_unreclaimable 94199637 ± 2% -15.3% 79794929 ± 2% proc-vmstat.numa_hit 93950007 ± 2% -15.3% 79550817 ± 2% proc-vmstat.numa_local 1.003e+08 ± 2% -15.3% 84985632 ± 2% proc-vmstat.pgalloc_normal 1.469e+08 -16.3% 1.23e+08 ± 3% proc-vmstat.pgfault 99165759 ± 2% -15.5% 83766426 ± 2% proc-vmstat.pgfree 87487 -16.7% 72919 ± 2% proc-vmstat.unevictable_pgs_culled 93994 -16.1% 78879 proc-vmstat.unevictable_pgs_mlocked 93984 -16.1% 78842 proc-vmstat.unevictable_pgs_munlocked 87454 -16.7% 72878 ± 2% proc-vmstat.unevictable_pgs_rescued 102462 -17.1% 84961 ± 2% sched_debug.cfs_rq:/.avg_vruntime.avg 67126 ± 2% -23.1% 51633 ± 4% sched_debug.cfs_rq:/.avg_vruntime.min 113508 ± 15% -27.4% 82463 ± 7% sched_debug.cfs_rq:/.avg_vruntime.stddev 90.19 ± 19% -67.4% 29.37 ± 84% sched_debug.cfs_rq:/.removed.load_avg.avg 250.01 ± 14% -46.2% 134.57 ± 47% sched_debug.cfs_rq:/.removed.load_avg.stddev 36.07 ± 21% -65.6% 12.39 ± 83% sched_debug.cfs_rq:/.removed.runnable_avg.avg 107.04 ± 16% -44.0% 59.99 ± 45% sched_debug.cfs_rq:/.removed.runnable_avg.stddev 36.08 ± 21% -65.8% 12.34 ± 83% sched_debug.cfs_rq:/.removed.util_avg.avg 107.00 ± 16% -44.1% 59.82 ± 45% sched_debug.cfs_rq:/.removed.util_avg.stddev 239.44 ± 4% -12.1% 210.47 ± 10% sched_debug.cfs_rq:/.runnable_avg.stddev 238.92 ± 4% -14.4% 204.47 ± 11% sched_debug.cfs_rq:/.util_avg.stddev 102432 -17.1% 84930 ± 2% sched_debug.cfs_rq:/.zero_vruntime.avg 67124 ± 2% -23.1% 51633 ± 4% sched_debug.cfs_rq:/.zero_vruntime.min 113448 ± 15% -27.3% 82455 ± 7% sched_debug.cfs_rq:/.zero_vruntime.stddev 249249 ± 13% -24.0% 189403 ± 20% sched_debug.cpu.avg_idle.stddev 1193041 -16.1% 1000474 ± 2% sched_debug.cpu.curr->pid.max 56973 -19.5% 45891 sched_debug.cpu.nr_switches.avg 75866 ± 2% -15.6% 64019 ± 3% sched_debug.cpu.nr_switches.max 6795 ± 5% -18.8% 5519 ± 6% sched_debug.cpu.nr_switches.stddev 0.01 ±118% +1691.7% 0.24 ± 69% sched_debug.cpu.nr_uninterruptible.avg 1.587e+10 -9.1% 1.442e+10 perf-stat.i.branch-instructions 1.412e+08 -8.0% 1.299e+08 perf-stat.i.branch-misses 4.647e+08 -9.8% 4.191e+08 ± 3% perf-stat.i.cache-misses 1.273e+09 -9.3% 1.155e+09 ± 2% perf-stat.i.cache-references 421189 -12.6% 367928 perf-stat.i.context-switches 1.601e+11 -9.3% 1.452e+11 perf-stat.i.cpu-cycles 19252 -10.8% 17178 perf-stat.i.cpu-migrations 347.41 +4.1% 361.51 ± 3% perf-stat.i.cycles-between-cache-misses 8.202e+10 -9.1% 7.453e+10 perf-stat.i.instructions 23.97 -10.7% 21.40 ± 2% perf-stat.i.metric.K/sec 2416028 -10.0% 2173992 ± 2% perf-stat.i.minor-faults 2532961 -10.0% 2278615 ± 2% perf-stat.i.page-faults 1.557e+10 -14.1% 1.338e+10 perf-stat.ps.branch-instructions 1.384e+08 -14.3% 1.185e+08 perf-stat.ps.branch-misses 4.554e+08 -15.8% 3.834e+08 ± 3% perf-stat.ps.cache-misses 1.248e+09 -14.8% 1.064e+09 ± 2% perf-stat.ps.cache-references 412177 -19.6% 331200 perf-stat.ps.context-switches 1.571e+11 -14.2% 1.349e+11 ± 2% perf-stat.ps.cpu-cycles 18872 -16.9% 15690 ± 2% perf-stat.ps.cpu-migrations 8.051e+10 -14.2% 6.911e+10 perf-stat.ps.instructions 2369827 -15.8% 1995000 ± 3% perf-stat.ps.minor-faults 2484512 -15.8% 2090911 ± 3% perf-stat.ps.page-faults 4.92e+12 -15.1% 4.178e+12 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