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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 3.8% regression of vm-scalability.throughput on: commit: 9890ecab6ad9c0d3d342469f3b619fd704b5c59a ("mm: folio_zero_user: clear pages sequentially") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [still regression on linus/master 0031c06807cfa8aa51a759ff8aa09e1aa48149af] [still regression on linux-next/master c025f6cf4209e1542ec2afebe49f42bbaf1a5c7b] testcase: vm-scalability config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 224 threads 4 sockets Intel(R) Xeon(R) Platinum 8380H CPU @ 2.90GHz (Cooper Lake) with 192G memory parameters: runtime: 300s size: 8T test: anon-w-seq-mt 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/202603101342.297fb270-lkp@intel.com Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260310/202603101342.297fb270-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/rootfs/runtime/size/tbox_group/test/testcase: gcc-14/performance/x86_64-rhel-9.4/debian-13-x86_64-20250902.cgz/300s/8T/lkp-cpl-4sp2/anon-w-seq-mt/vm-scalability commit: cb431accb3 ("x86/clear_page: introduce clear_pages()") 9890ecab6a ("mm: folio_zero_user: clear pages sequentially") cb431accb36e51b6 9890ecab6ad9c0d3d342469f3b6 ---------------- --------------------------- %stddev %change %stddev \ | \ 0.08 ± 3% +8.7% 0.09 ± 3% vm-scalability.free_time 357969 -6.6% 334511 vm-scalability.median 1.034e+08 -3.8% 99382138 vm-scalability.throughput 634243 -13.6% 548120 ± 6% vm-scalability.time.involuntary_context_switches 12706518 -6.6% 11872543 vm-scalability.time.minor_page_faults 15142 -4.2% 14512 vm-scalability.time.system_time 16939 +6.1% 17975 vm-scalability.time.user_time 251227 -6.8% 234071 vm-scalability.time.voluntary_context_switches 1.791e+10 -6.6% 1.674e+10 vm-scalability.workload 0.30 -7.5% 0.28 turbostat.IPC 9203 -5.5% 8693 vmstat.system.cs 0.08 +0.0 0.08 mpstat.cpu.all.soft% 25.14 +1.5 26.62 mpstat.cpu.all.usr% 3.13 +18.3% 3.71 perf-stat.i.MPKI 6.22e+10 -6.6% 5.81e+10 perf-stat.i.branch-instructions 61.69 +9.8 71.51 perf-stat.i.cache-miss-rate% 6.147e+08 +10.7% 6.805e+08 perf-stat.i.cache-misses 9.904e+08 -4.7% 9.436e+08 perf-stat.i.cache-references 9303 -5.2% 8823 perf-stat.i.context-switches 2.17 +8.2% 2.35 perf-stat.i.cpi 598.97 -4.6% 571.28 perf-stat.i.cpu-migrations 1.95e+11 -6.6% 1.822e+11 perf-stat.i.instructions 0.47 -7.2% 0.43 perf-stat.i.ipc 43153 -6.5% 40334 perf-stat.i.minor-faults 43153 -6.5% 40335 perf-stat.i.page-faults 3.16 +18.5% 3.74 perf-stat.overall.MPKI 0.02 +0.0 0.03 perf-stat.overall.branch-miss-rate% 62.11 +10.1 72.19 perf-stat.overall.cache-miss-rate% 2.19 +8.3% 2.37 perf-stat.overall.cpi 692.89 -8.6% 633.07 perf-stat.overall.cycles-between-cache-misses 0.46 -7.6% 0.42 perf-stat.overall.ipc 6.121e+10 -6.8% 5.705e+10 perf-stat.ps.branch-instructions 6.054e+08 +10.5% 6.689e+08 perf-stat.ps.cache-misses 9.747e+08 -4.9% 9.266e+08 perf-stat.ps.cache-references 9124 -5.6% 8613 perf-stat.ps.context-switches 583.66 -4.9% 555.21 perf-stat.ps.cpu-migrations 1.919e+11 -6.8% 1.789e+11 perf-stat.ps.instructions 42389 -6.7% 39549 perf-stat.ps.minor-faults 42389 -6.7% 39549 perf-stat.ps.page-faults 5.812e+13 -6.5% 5.434e+13 perf-stat.total.instructions 40.26 -40.3 0.00 perf-profile.calltrace.cycles-pp.clear_subpage.folio_zero_user.vma_alloc_anon_folio_pmd.__do_huge_pmd_anonymous_page.__handle_mm_fault 40.76 -2.1 38.66 perf-profile.calltrace.cycles-pp.folio_zero_user.vma_alloc_anon_folio_pmd.__do_huge_pmd_anonymous_page.__handle_mm_fault.handle_mm_fault 42.59 -2.0 40.61 perf-profile.calltrace.cycles-pp.asm_exc_page_fault.do_access 42.54 -2.0 40.57 perf-profile.calltrace.cycles-pp.do_user_addr_fault.exc_page_fault.asm_exc_page_fault.do_access 42.54 -2.0 40.57 perf-profile.calltrace.cycles-pp.exc_page_fault.asm_exc_page_fault.do_access 42.40 -2.0 40.43 perf-profile.calltrace.cycles-pp.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault.do_access 42.32 -2.0 40.36 perf-profile.calltrace.cycles-pp.__handle_mm_fault.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault 42.23 -2.0 40.27 perf-profile.calltrace.cycles-pp.__do_huge_pmd_anonymous_page.__handle_mm_fault.handle_mm_fault.do_user_addr_fault.exc_page_fault 41.70 -2.0 39.74 perf-profile.calltrace.cycles-pp.vma_alloc_anon_folio_pmd.__do_huge_pmd_anonymous_page.__handle_mm_fault.handle_mm_fault.do_user_addr_fault 0.76 -0.0 0.72 perf-profile.calltrace.cycles-pp.vma_alloc_folio_noprof.vma_alloc_anon_folio_pmd.__do_huge_pmd_anonymous_page.__handle_mm_fault.handle_mm_fault 0.72 -0.0 0.68 perf-profile.calltrace.cycles-pp.__alloc_frozen_pages_noprof.alloc_pages_mpol.vma_alloc_folio_noprof.vma_alloc_anon_folio_pmd.__do_huge_pmd_anonymous_page 0.67 -0.0 0.64 perf-profile.calltrace.cycles-pp.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol.vma_alloc_folio_noprof.vma_alloc_anon_folio_pmd 0.72 -0.0 0.69 perf-profile.calltrace.cycles-pp.alloc_pages_mpol.vma_alloc_folio_noprof.vma_alloc_anon_folio_pmd.__do_huge_pmd_anonymous_page.__handle_mm_fault 0.56 -0.0 0.54 perf-profile.calltrace.cycles-pp.prep_new_page.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol.vma_alloc_folio_noprof 0.00 +0.8 0.76 ± 2% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.folio_zero_user.vma_alloc_anon_folio_pmd.__do_huge_pmd_anonymous_page.__handle_mm_fault 30.25 +1.2 31.46 perf-profile.calltrace.cycles-pp.do_rw_once 40.49 -40.5 0.00 perf-profile.children.cycles-pp.clear_subpage 42.61 -2.0 40.63 perf-profile.children.cycles-pp.asm_exc_page_fault 42.55 -2.0 40.58 perf-profile.children.cycles-pp.exc_page_fault 42.54 -2.0 40.57 perf-profile.children.cycles-pp.do_user_addr_fault 42.40 -2.0 40.43 perf-profile.children.cycles-pp.handle_mm_fault 42.33 -2.0 40.36 perf-profile.children.cycles-pp.__handle_mm_fault 42.23 -2.0 40.27 perf-profile.children.cycles-pp.__do_huge_pmd_anonymous_page 41.70 -2.0 39.74 perf-profile.children.cycles-pp.vma_alloc_anon_folio_pmd 40.83 -1.9 38.92 perf-profile.children.cycles-pp.folio_zero_user 63.93 -1.2 62.77 perf-profile.children.cycles-pp.do_access 0.95 -0.0 0.91 perf-profile.children.cycles-pp.__alloc_frozen_pages_noprof 0.78 -0.0 0.74 perf-profile.children.cycles-pp.vma_alloc_folio_noprof 0.95 -0.0 0.92 perf-profile.children.cycles-pp.alloc_pages_mpol 0.79 -0.0 0.76 perf-profile.children.cycles-pp.get_page_from_freelist 0.63 -0.0 0.60 perf-profile.children.cycles-pp.prep_new_page 40.31 +2.5 42.80 perf-profile.children.cycles-pp.do_rw_once 39.77 -39.8 0.00 perf-profile.self.cycles-pp.clear_subpage 9.54 -0.3 9.23 perf-profile.self.cycles-pp.do_access 0.55 -0.0 0.53 perf-profile.self.cycles-pp.prep_new_page 38.35 +2.6 40.96 perf-profile.self.cycles-pp.do_rw_once 0.36 ± 2% +38.0 38.32 perf-profile.self.cycles-pp.folio_zero_user 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