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X-MS-Exchange-CrossTenant-UserPrincipalName: 6zyTgnx1TVEnrWlqFVvIK000fPoD2m8jui2phhA1dO6lCbiadk8XQhVKGYbg57q4JpWAh9avR43L5e6IkwZsFg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR11MB7122 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 2.9% improvement of will-it-scale.per_process_ops on: commit: 36df6e3dbd7e7b074e55fec080012184e2fa3a46 ("cgroup: make css_rstat_updated nmi safe") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master testcase: will-it-scale config: x86_64-rhel-9.4 compiler: gcc-12 test machine: 192 threads 2 sockets Intel(R) Xeon(R) Platinum 8468V CPU @ 2.4GHz (Sapphire Rapids) with 384G memory parameters: nr_task: 100% mode: process test: tlb_flush2 cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250731/202507310831.cf3e212e-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase: gcc-12/performance/x86_64-rhel-9.4/process/100%/debian-12-x86_64-20240206.cgz/igk-spr-2sp3/tlb_flush2/will-it-scale commit: 1257b8786a ("cgroup: support to enable nmi-safe css_rstat_updated") 36df6e3dbd ("cgroup: make css_rstat_updated nmi safe") 1257b8786ac689a2 36df6e3dbd7e7b074e55fec0800 ---------------- --------------------------- %stddev %change %stddev \ | \ 2.78 ± 2% +0.3 3.11 mpstat.cpu.all.usr% 522283 ± 32% +29.1% 674402 ± 5% sched_debug.cpu.avg_idle.min 11822911 +2.9% 12170263 will-it-scale.192.processes 61577 +2.9% 63386 will-it-scale.per_process_ops 11822911 +2.9% 12170263 will-it-scale.workload 2.98 ± 11% -25.3% 2.23 ± 31% perf-sched.sch_delay.max.ms.wait_for_partner.fifo_open.do_dentry_open.vfs_open 4312 ± 11% +13.1% 4878 perf-sched.total_wait_and_delay.max.ms 4312 ± 11% +13.1% 4878 perf-sched.total_wait_time.max.ms 320.37 ±104% +191.2% 932.90 ± 14% perf-sched.wait_and_delay.max.ms.__cond_resched.process_one_work.worker_thread.kthread.ret_from_fork 365.55 ± 83% +155.2% 932.79 ± 14% perf-sched.wait_time.max.ms.__cond_resched.process_one_work.worker_thread.kthread.ret_from_fork 2.98 ± 11% -32.0% 2.03 ± 32% perf-sched.wait_time.max.ms.wait_for_partner.fifo_open.do_dentry_open.vfs_open 18415 +2.9% 18955 proc-vmstat.nr_kernel_stack 1.791e+09 +3.1% 1.848e+09 proc-vmstat.nr_unaccepted 3.59e+09 +3.0% 3.697e+09 proc-vmstat.numa_interleave 3.589e+09 +3.0% 3.697e+09 proc-vmstat.pgalloc_dma32 7.12e+09 +3.0% 7.334e+09 proc-vmstat.pglazyfree 3.589e+09 +3.0% 3.696e+09 proc-vmstat.pgskip_device 2.716e+10 +1.7% 2.761e+10 perf-stat.i.branch-instructions 0.15 +0.0 0.15 perf-stat.i.branch-miss-rate% 38117449 +3.6% 39497918 perf-stat.i.branch-misses 4.20 -1.1% 4.16 perf-stat.i.cpi 0.24 +1.1% 0.24 perf-stat.i.ipc 245.58 +3.0% 252.83 perf-stat.i.metric.K/sec 23582407 +2.9% 24272602 perf-stat.i.minor-faults 23582407 +2.9% 24272602 perf-stat.i.page-faults 0.14 +0.0 0.14 perf-stat.overall.branch-miss-rate% 4.21 -1.1% 4.16 perf-stat.overall.cpi 3359915 -1.8% 3300246 perf-stat.overall.path-length 2.706e+10 +1.7% 2.752e+10 perf-stat.ps.branch-instructions 37940559 +3.7% 39340939 perf-stat.ps.branch-misses 23496794 +2.9% 24189927 perf-stat.ps.minor-faults 23496794 +2.9% 24189927 perf-stat.ps.page-faults 3.972e+13 +1.1% 4.016e+13 perf-stat.total.instructions 58.13 -1.6 56.50 perf-profile.calltrace.cycles-pp.folio_batch_move_lru.folio_add_lru.do_anonymous_page.__handle_mm_fault.handle_mm_fault 58.24 -1.6 56.62 perf-profile.calltrace.cycles-pp.folio_add_lru.do_anonymous_page.__handle_mm_fault.handle_mm_fault.do_user_addr_fault 59.95 -1.5 58.46 perf-profile.calltrace.cycles-pp.do_anonymous_page.__handle_mm_fault.handle_mm_fault.do_user_addr_fault.exc_page_fault 60.58 -1.4 59.16 perf-profile.calltrace.cycles-pp.__handle_mm_fault.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault 61.08 -1.4 59.69 perf-profile.calltrace.cycles-pp.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault.testcase 62.15 -1.3 60.87 perf-profile.calltrace.cycles-pp.do_user_addr_fault.exc_page_fault.asm_exc_page_fault.testcase 62.26 -1.3 60.99 perf-profile.calltrace.cycles-pp.exc_page_fault.asm_exc_page_fault.testcase 28.72 -1.1 27.64 perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.folio_lruvec_lock_irqsave.folio_batch_move_lru.folio_add_lru 28.74 -1.1 27.66 perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.folio_lruvec_lock_irqsave.folio_batch_move_lru.folio_add_lru.do_anonymous_page 28.74 -1.1 27.66 perf-profile.calltrace.cycles-pp.folio_lruvec_lock_irqsave.folio_batch_move_lru.folio_add_lru.do_anonymous_page.__handle_mm_fault 66.84 -0.9 65.93 perf-profile.calltrace.cycles-pp.asm_exc_page_fault.testcase 67.47 -0.8 66.62 perf-profile.calltrace.cycles-pp.testcase 28.90 -0.6 28.27 perf-profile.calltrace.cycles-pp.folios_put_refs.folio_batch_move_lru.folio_add_lru.do_anonymous_page.__handle_mm_fault 0.54 ± 4% +0.1 0.59 perf-profile.calltrace.cycles-pp.__alloc_frozen_pages_noprof.alloc_pages_mpol.vma_alloc_folio_noprof.alloc_anon_folio.do_anonymous_page 0.60 ± 4% +0.1 0.66 perf-profile.calltrace.cycles-pp.alloc_pages_mpol.vma_alloc_folio_noprof.alloc_anon_folio.do_anonymous_page.__handle_mm_fault 0.68 ± 3% +0.1 0.74 perf-profile.calltrace.cycles-pp.vma_alloc_folio_noprof.alloc_anon_folio.do_anonymous_page.__handle_mm_fault.handle_mm_fault 0.84 ± 4% +0.1 0.92 perf-profile.calltrace.cycles-pp.unmap_page_range.zap_page_range_single_batched.madvise_dontneed_free.madvise_vma_behavior.madvise_do_behavior 0.94 ± 4% +0.1 1.03 perf-profile.calltrace.cycles-pp.zap_page_range_single_batched.madvise_dontneed_free.madvise_vma_behavior.madvise_do_behavior.do_madvise 1.00 ± 4% +0.1 1.10 perf-profile.calltrace.cycles-pp.madvise_dontneed_free.madvise_vma_behavior.madvise_do_behavior.do_madvise.__x64_sys_madvise 0.92 ± 3% +0.1 1.02 perf-profile.calltrace.cycles-pp.alloc_anon_folio.do_anonymous_page.__handle_mm_fault.handle_mm_fault.do_user_addr_fault 1.06 ± 4% +0.1 1.16 perf-profile.calltrace.cycles-pp.madvise_vma_behavior.madvise_do_behavior.do_madvise.__x64_sys_madvise.do_syscall_64 1.48 ± 4% +0.2 1.64 perf-profile.calltrace.cycles-pp.madvise_do_behavior.do_madvise.__x64_sys_madvise.do_syscall_64.entry_SYSCALL_64_after_hwframe 0.26 ±100% +0.3 0.55 perf-profile.calltrace.cycles-pp.lock_vma_under_rcu.do_user_addr_fault.exc_page_fault.asm_exc_page_fault.testcase 0.60 ± 6% +0.3 0.95 perf-profile.calltrace.cycles-pp.flush_tlb_func.flush_tlb_mm_range.tlb_finish_mmu.do_madvise.__x64_sys_madvise 0.77 ± 5% +0.4 1.14 perf-profile.calltrace.cycles-pp.flush_tlb_mm_range.tlb_finish_mmu.do_madvise.__x64_sys_madvise.do_syscall_64 0.08 ±223% +0.5 0.59 perf-profile.calltrace.cycles-pp.native_flush_tlb_one_user.flush_tlb_func.flush_tlb_mm_range.tlb_finish_mmu.do_madvise 32.13 ± 2% +0.8 32.98 perf-profile.calltrace.cycles-pp.__madvise 58.20 -1.6 56.57 perf-profile.children.cycles-pp.folio_batch_move_lru 58.30 -1.6 56.68 perf-profile.children.cycles-pp.folio_add_lru 59.98 -1.5 58.50 perf-profile.children.cycles-pp.do_anonymous_page 60.60 -1.4 59.18 perf-profile.children.cycles-pp.__handle_mm_fault 61.12 -1.4 59.73 perf-profile.children.cycles-pp.handle_mm_fault 62.19 -1.3 60.90 perf-profile.children.cycles-pp.do_user_addr_fault 62.28 -1.3 61.01 perf-profile.children.cycles-pp.exc_page_fault 67.07 -0.9 66.15 perf-profile.children.cycles-pp.asm_exc_page_fault 0.14 ± 5% -0.1 0.09 ± 4% perf-profile.children.cycles-pp.css_rstat_updated 0.11 ± 3% -0.0 0.10 ± 4% perf-profile.children.cycles-pp.record__mmap_read_evlist 0.12 ± 4% -0.0 0.10 ± 6% perf-profile.children.cycles-pp.handle_internal_command 0.12 ± 4% -0.0 0.10 ± 6% perf-profile.children.cycles-pp.main 0.12 ± 4% -0.0 0.10 ± 6% perf-profile.children.cycles-pp.run_builtin 0.12 ± 4% -0.0 0.10 ± 6% perf-profile.children.cycles-pp.__cmd_record 0.12 ± 4% -0.0 0.10 ± 6% perf-profile.children.cycles-pp.cmd_record 0.11 -0.0 0.10 ± 4% perf-profile.children.cycles-pp.perf_mmap__push 0.10 ± 3% +0.0 0.11 perf-profile.children.cycles-pp.access_error 0.11 ± 3% +0.0 0.12 perf-profile.children.cycles-pp.update_process_times 0.16 ± 5% +0.0 0.18 ± 2% perf-profile.children.cycles-pp.clear_page_erms 0.19 ± 3% +0.0 0.22 ± 3% perf-profile.children.cycles-pp.__mem_cgroup_charge 0.30 ± 5% +0.0 0.34 perf-profile.children.cycles-pp.find_vma_prev 0.45 ± 4% +0.0 0.49 perf-profile.children.cycles-pp.get_page_from_freelist 0.26 ± 9% +0.0 0.31 perf-profile.children.cycles-pp.lru_gen_add_folio 0.41 ± 3% +0.0 0.45 perf-profile.children.cycles-pp.mas_walk 0.00 +0.1 0.05 perf-profile.children.cycles-pp.get_vma_policy 0.52 ± 4% +0.1 0.57 perf-profile.children.cycles-pp.lock_vma_under_rcu 0.56 ± 4% +0.1 0.61 perf-profile.children.cycles-pp.__alloc_frozen_pages_noprof 0.63 ± 3% +0.1 0.69 perf-profile.children.cycles-pp.alloc_pages_mpol 0.68 ± 3% +0.1 0.75 perf-profile.children.cycles-pp.vma_alloc_folio_noprof 0.38 ± 9% +0.1 0.44 perf-profile.children.cycles-pp.lru_add 0.96 ± 4% +0.1 1.04 perf-profile.children.cycles-pp.unmap_page_range 0.94 ± 4% +0.1 1.04 perf-profile.children.cycles-pp.zap_page_range_single_batched 0.94 ± 4% +0.1 1.04 perf-profile.children.cycles-pp.alloc_anon_folio 1.01 ± 4% +0.1 1.11 perf-profile.children.cycles-pp.madvise_dontneed_free 1.06 ± 4% +0.1 1.17 perf-profile.children.cycles-pp.madvise_vma_behavior 0.01 ±223% +0.1 0.12 perf-profile.children.cycles-pp.mm_needs_global_asid 0.47 ± 5% +0.1 0.59 perf-profile.children.cycles-pp.native_flush_tlb_one_user 1.49 ± 4% +0.2 1.64 perf-profile.children.cycles-pp.madvise_do_behavior 0.62 ± 5% +0.4 0.97 perf-profile.children.cycles-pp.flush_tlb_func 0.79 ± 6% +0.4 1.17 perf-profile.children.cycles-pp.flush_tlb_mm_range 32.30 ± 2% +0.9 33.16 perf-profile.children.cycles-pp.__madvise 0.21 ± 10% -0.1 0.09 ± 5% perf-profile.self.cycles-pp.free_pages_and_swap_cache 0.13 ± 6% -0.1 0.07 ± 10% perf-profile.self.cycles-pp.css_rstat_updated 0.05 +0.0 0.06 perf-profile.self.cycles-pp._raw_spin_trylock 0.05 +0.0 0.06 perf-profile.self.cycles-pp.zap_page_range_single_batched 0.06 +0.0 0.07 perf-profile.self.cycles-pp.find_vma_prev 0.07 ± 6% +0.0 0.09 ± 4% perf-profile.self.cycles-pp.folio_batch_move_lru 0.14 ± 4% +0.0 0.16 ± 3% perf-profile.self.cycles-pp.unmap_page_range 0.12 ± 6% +0.0 0.14 perf-profile.self.cycles-pp.flush_tlb_mm_range 0.10 ± 8% +0.0 0.12 ± 3% perf-profile.self.cycles-pp.lru_add 0.21 ± 3% +0.0 0.23 ± 2% perf-profile.self.cycles-pp.handle_mm_fault 0.18 ± 9% +0.0 0.21 perf-profile.self.cycles-pp.lru_gen_add_folio 0.39 ± 3% +0.0 0.44 perf-profile.self.cycles-pp.mas_walk 0.00 +0.1 0.12 ± 4% perf-profile.self.cycles-pp.mm_needs_global_asid 0.46 ± 5% +0.1 0.58 perf-profile.self.cycles-pp.native_flush_tlb_one_user 0.11 ± 7% +0.2 0.27 perf-profile.self.cycles-pp.flush_tlb_func 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