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 zqaKrfXX 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, kernel test robot noticed a 60.5% regression of will-it-scale.per_process_ops on: commit: 17c38c88294d75506c67cae378c9e940d1ce55e3 ("slab: remove cpu (partial) slabs usage from allocation paths") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [still regression on linus/master 8bf22c33e7a172fbc72464f4cc484d23a6b412ba] [still regression on linux-next/master 44982d352c33767cd8d19f8044e7e1161a587ff7] testcase: will-it-scale config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 48 threads 2 sockets Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz (Ivy Bridge-EP) with 64G memory parameters: nr_task: 100% mode: process test: brk1 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/202602261526.dc2fdec-lkp@intel.com Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260226/202602261526.dc2fdec-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase: gcc-14/performance/x86_64-rhel-9.4/process/100%/debian-13-x86_64-20250902.cgz/lkp-ivb-2ep2/brk1/will-it-scale commit: ed30c4adfc ("slab: add optimized sheaf refill from partial list") 17c38c8829 ("slab: remove cpu (partial) slabs usage from allocation paths") ed30c4adfc2b5690 17c38c88294d75506c67cae378c ---------------- --------------------------- %stddev %change %stddev \ | \ 22625956 -60.5% 8947026 will-it-scale.48.processes 471373 -60.5% 186395 will-it-scale.per_process_ops 22625956 -60.5% 8947026 will-it-scale.workload 20.65 -74.9% 5.19 vmstat.cpu.us 10502 ± 3% -87.0% 1366 ± 9% vmstat.system.cs 1.31 -0.1 1.20 mpstat.cpu.all.irq% 4.13 -1.9 2.21 mpstat.cpu.all.soft% 73.24 +17.4 90.61 mpstat.cpu.all.sys% 20.67 -15.3 5.36 mpstat.cpu.all.usr% 179.60 -4.1% 172.24 turbostat.CorWatt 0.39 -40.0% 0.23 ± 2% turbostat.IPC 211.17 -4.4% 201.86 turbostat.PkgWatt 21.36 -45.0% 11.76 turbostat.RAMWatt 0.07 ± 6% -38.7% 0.04 ± 9% perf-sched.sch_delay.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 0.07 ± 6% -38.7% 0.04 ± 9% perf-sched.total_sch_delay.average.ms 18.17 ± 3% +262.0% 65.77 ± 8% perf-sched.total_wait_and_delay.average.ms 47429 ± 4% -84.9% 7139 ± 10% perf-sched.total_wait_and_delay.count.ms 18.10 ± 3% +263.2% 65.72 ± 8% perf-sched.total_wait_time.average.ms 18.17 ± 3% +262.0% 65.77 ± 8% perf-sched.wait_and_delay.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 47429 ± 4% -84.9% 7139 ± 10% perf-sched.wait_and_delay.count.[unknown].[unknown].[unknown].[unknown].[unknown] 18.10 ± 3% +263.2% 65.72 ± 8% perf-sched.wait_time.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 0.68 -83.8% 0.11 ± 6% perf-stat.i.MPKI 1.657e+10 -35.2% 1.073e+10 perf-stat.i.branch-instructions 0.27 ± 2% +0.1 0.34 ± 2% perf-stat.i.branch-miss-rate% 43387409 -17.1% 35980500 ± 2% perf-stat.i.branch-misses 38.35 -35.8 2.53 ± 6% perf-stat.i.cache-miss-rate% 56795946 -90.4% 5475678 ± 6% perf-stat.i.cache-misses 1.48e+08 +48.5% 2.198e+08 perf-stat.i.cache-references 10520 ± 3% -87.4% 1322 ± 9% perf-stat.i.context-switches 1.70 +65.9% 2.81 perf-stat.i.cpi 2499 +1000.8% 27508 ± 6% perf-stat.i.cycles-between-cache-misses 8.369e+10 -39.7% 5.048e+10 perf-stat.i.instructions 0.59 -39.7% 0.36 perf-stat.i.ipc 0.68 -84.0% 0.11 ± 6% perf-stat.overall.MPKI 0.26 +0.1 0.34 ± 2% perf-stat.overall.branch-miss-rate% 38.37 -35.9 2.49 ± 6% perf-stat.overall.cache-miss-rate% 1.70 +65.9% 2.81 perf-stat.overall.cpi 2500 +942.6% 26067 ± 6% perf-stat.overall.cycles-between-cache-misses 0.59 -39.7% 0.36 perf-stat.overall.ipc 1117006 +52.3% 1700887 perf-stat.overall.path-length 1.651e+10 -35.2% 1.069e+10 perf-stat.ps.branch-instructions 43243442 -17.1% 35861582 ± 2% perf-stat.ps.branch-misses 56607711 -90.4% 5457714 ± 6% perf-stat.ps.cache-misses 1.475e+08 +48.5% 2.191e+08 perf-stat.ps.cache-references 10485 ± 3% -87.4% 1318 ± 9% perf-stat.ps.context-switches 8.341e+10 -39.7% 5.031e+10 perf-stat.ps.instructions 2.527e+13 -39.8% 1.522e+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