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X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 29.1% improvement of lmbench3.PIPE.bandwidth.MB/sec on: commit: 212ed884a1aeefda22d87c270d082e4b0a95821f ("fs/pipe: pre-allocate pages outside pipe->mutex in anon_pipe_write") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master testcase: lmbench3 config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 512G memory parameters: test_memory_size: 50% nr_threads: 20% mode: development test: PIPE cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260709/202607091015.c3936260-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/mode/nr_threads/rootfs/tbox_group/test/test_memory_size/testcase: gcc-14/performance/x86_64-rhel-9.4/development/20%/debian-13-x86_64-20250902.cgz/lkp-spr-2sp4/PIPE/50%/lmbench3 commit: d24576fddf ("fs: retire stale comment in fget_task_next()") 212ed884a1 ("fs/pipe: pre-allocate pages outside pipe->mutex in anon_pipe_write") d24576fddf645a84 212ed884a1aeefda22d87c270d0 ---------------- --------------------------- %stddev %change %stddev \ | \ 37316 +29.1% 48191 ± 2% lmbench3.PIPE.bandwidth.MB/sec 5690 ± 9% +153.5% 14426 ± 18% lmbench3.time.involuntary_context_switches 2190 ± 4% +80.9% 3962 ± 8% lmbench3.time.percent_of_cpu_this_job_got 3153 ± 8% +92.6% 6074 ± 17% lmbench3.time.system_time 3.564e+08 ± 2% -20.5% 2.835e+08 ± 3% lmbench3.time.voluntary_context_switches 3.599e+08 ± 2% -20.8% 2.851e+08 ± 3% cpuidle..usage 859014 ± 6% +12.6% 966825 ± 5% meminfo.Shmem 0.32 ± 72% +208.8% 0.98 ± 96% perf-sched.sch_delay.max.ms.perf_trace_sched_switch.schedule_hrtimeout_range_clock.poll_schedule_timeout.constprop.0 2.384e+08 ± 7% +34.9% 3.215e+08 ± 26% numa-numastat.node0.local_node 2.399e+08 ± 7% +34.7% 3.233e+08 ± 27% numa-numastat.node0.numa_hit 2.553e+08 ± 9% +35.9% 3.47e+08 ± 15% numa-numastat.node1.local_node 2.568e+08 ± 9% +35.9% 3.491e+08 ± 15% numa-numastat.node1.numa_hit 2.399e+08 ± 7% +34.7% 3.233e+08 ± 27% numa-vmstat.node0.numa_hit 2.384e+08 ± 7% +34.9% 3.215e+08 ± 26% numa-vmstat.node0.numa_local 2.568e+08 ± 9% +35.9% 3.491e+08 ± 15% numa-vmstat.node1.numa_hit 2.553e+08 ± 9% +35.9% 3.47e+08 ± 15% numa-vmstat.node1.numa_local 4944973 ± 2% -21.4% 3888342 ± 6% perf-stat.i.context-switches 376.79 -17.1% 312.47 perf-stat.i.cpu-migrations 4816826 ± 2% -23.7% 3676908 ± 6% perf-stat.ps.context-switches 373.27 -17.4% 308.16 ± 2% perf-stat.ps.cpu-migrations 90.49 -8.8% 82.53 vmstat.cpu.id 22.14 ± 3% +79.8% 39.80 ± 8% vmstat.procs.r 4741221 ± 2% -23.6% 3623691 ± 6% vmstat.system.cs 80532 +14.0% 91771 vmstat.system.in 90.21 -8.0 82.22 mpstat.cpu.all.idle% 0.07 ± 3% +0.0 0.08 ± 4% mpstat.cpu.all.irq% 0.03 ± 4% -0.0 0.02 ± 5% mpstat.cpu.all.soft% 9.31 ± 4% +8.0 17.31 ± 8% mpstat.cpu.all.sys% 146.33 ± 3% -21.0% 115.67 mpstat.max_utilization.seconds 20.10 +94.4% 39.08 mpstat.max_utilization_pct 1255045 +2.1% 1281940 proc-vmstat.nr_file_pages 214782 ± 6% +12.5% 241716 ± 5% proc-vmstat.nr_shmem 3725 ± 14% +33.6% 4975 ± 9% proc-vmstat.numa_hint_faults_local 4.968e+08 ± 8% +35.3% 6.723e+08 ± 19% proc-vmstat.numa_hit 4.937e+08 ± 8% +35.4% 6.686e+08 ± 19% proc-vmstat.numa_local 5.028e+08 ± 8% +35.0% 6.787e+08 ± 19% proc-vmstat.pgalloc_normal 5.025e+08 ± 8% +35.0% 6.783e+08 ± 19% proc-vmstat.pgfree 398.67 ± 3% +52.3% 607.33 ± 6% turbostat.Avg_MHz 12.58 ± 3% +7.1 19.67 ± 6% turbostat.Busy% 3167 -2.5% 3087 turbostat.Bzy_MHz 9.08 ± 4% -7.1 2.00 ± 2% turbostat.C1E% 19.36 ± 3% -57.8% 8.17 ± 3% turbostat.CPU%c1 57.00 ± 2% +6.4% 60.67 ± 2% turbostat.CoreTmp 11901244 ± 4% +19.5% 14217328 ± 8% turbostat.IRQ 1658105 +65.0% 2736250 turbostat.NMI 57.17 ± 3% +7.9% 61.67 turbostat.PkgTmp 443.04 +6.4% 471.36 turbostat.PkgWatt 172875 +216.1% 546498 ± 49% sched_debug.cfs_rq:/.avg_vruntime.avg 384315 ± 3% +234.2% 1284302 ± 38% sched_debug.cfs_rq:/.avg_vruntime.max 63545 ± 4% +295.8% 251542 ± 22% sched_debug.cfs_rq:/.avg_vruntime.stddev 0.09 ± 8% +80.7% 0.17 ± 15% sched_debug.cfs_rq:/.h_nr_queued.avg 0.25 ± 4% +18.9% 0.29 ± 8% sched_debug.cfs_rq:/.h_nr_queued.stddev 0.09 ± 8% +81.2% 0.17 ± 15% sched_debug.cfs_rq:/.h_nr_runnable.avg 0.25 ± 4% +19.0% 0.29 ± 8% sched_debug.cfs_rq:/.h_nr_runnable.stddev 28978 ± 3% -11.9% 25542 ± 10% sched_debug.cfs_rq:/.load_avg.max 0.09 ± 8% +81.7% 0.17 ± 15% sched_debug.cfs_rq:/.nr_queued.avg 0.25 ± 4% +19.0% 0.29 ± 8% sched_debug.cfs_rq:/.nr_queued.stddev 124.05 ± 3% +58.2% 196.23 ± 11% sched_debug.cfs_rq:/.runnable_avg.avg 199.58 ± 3% +39.1% 277.61 ± 7% sched_debug.cfs_rq:/.runnable_avg.stddev 123.65 ± 3% +57.7% 195.06 ± 12% sched_debug.cfs_rq:/.util_avg.avg 199.25 ± 3% +38.9% 276.76 ± 7% sched_debug.cfs_rq:/.util_avg.stddev 45.47 ± 8% +224.8% 147.70 ± 16% sched_debug.cfs_rq:/.util_est.avg 682.06 ± 13% +22.9% 838.38 ± 13% sched_debug.cfs_rq:/.util_est.max 121.50 ± 6% +80.7% 219.58 ± 11% sched_debug.cfs_rq:/.util_est.stddev 172875 +216.1% 546496 ± 49% sched_debug.cfs_rq:/.zero_vruntime.avg 384315 ± 3% +234.2% 1284302 ± 38% sched_debug.cfs_rq:/.zero_vruntime.max 63545 ± 4% +295.8% 251542 ± 22% sched_debug.cfs_rq:/.zero_vruntime.stddev 1064 ± 4% +95.3% 2079 ± 15% sched_debug.cpu.curr->pid.avg 2660 ± 3% +21.7% 3238 ± 10% sched_debug.cpu.curr->pid.stddev 0.09 ± 4% +86.4% 0.16 ± 14% sched_debug.cpu.nr_running.avg 0.23 ± 3% +19.0% 0.28 ± 8% sched_debug.cpu.nr_running.stddev 51512 ± 14% -92.4% 3890 ± 77% sched_debug.cpu.nr_switches.min 22.76 -15.8 6.97 ± 2% perf-profile.calltrace.cycles-pp.copy_page_to_iter.anon_pipe_read.vfs_read.ksys_read.do_syscall_64 22.64 -15.7 6.92 ± 2% perf-profile.calltrace.cycles-pp._copy_to_iter.copy_page_to_iter.anon_pipe_read.vfs_read.ksys_read 65.71 -14.8 50.87 perf-profile.calltrace.cycles-pp.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe 65.68 -14.8 50.85 perf-profile.calltrace.cycles-pp.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe 65.54 -14.7 50.81 perf-profile.calltrace.cycles-pp.anon_pipe_read.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe 16.60 ± 2% -10.5 6.10 perf-profile.calltrace.cycles-pp.alloc_pages_noprof.anon_pipe_write.vfs_write.ksys_write.do_syscall_64 16.47 ± 2% -10.4 6.04 perf-profile.calltrace.cycles-pp.alloc_pages_mpol.alloc_pages_noprof.anon_pipe_write.vfs_write.ksys_write 16.28 ± 2% -10.3 5.96 perf-profile.calltrace.cycles-pp.__alloc_frozen_pages_noprof.alloc_pages_mpol.alloc_pages_noprof.anon_pipe_write.vfs_write 12.41 -8.0 4.40 ± 2% perf-profile.calltrace.cycles-pp.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol.alloc_pages_noprof.anon_pipe_write 7.69 -7.5 0.17 ±141% perf-profile.calltrace.cycles-pp.start_secondary.common_startup_64 7.68 -7.5 0.17 ±141% perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.common_startup_64 7.65 -7.5 0.17 ±141% perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.common_startup_64 7.81 -7.4 0.44 ± 44% perf-profile.calltrace.cycles-pp.common_startup_64 35.69 ± 2% -6.4 29.28 perf-profile.calltrace.cycles-pp.__folio_put.anon_pipe_read.vfs_read.ksys_read.do_syscall_64 35.62 ± 2% -6.4 29.24 perf-profile.calltrace.cycles-pp.__mem_cgroup_uncharge.__folio_put.anon_pipe_read.vfs_read.ksys_read 35.49 ± 2% -6.3 29.14 perf-profile.calltrace.cycles-pp.uncharge_batch.__mem_cgroup_uncharge.__folio_put.anon_pipe_read.vfs_read 9.66 ± 2% -6.0 3.61 ± 2% perf-profile.calltrace.cycles-pp.rmqueue.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol.alloc_pages_noprof 5.65 -5.6 0.00 perf-profile.calltrace.cycles-pp.cpuidle_idle_call.do_idle.cpu_startup_entry.start_secondary.common_startup_64 5.13 -5.1 0.00 perf-profile.calltrace.cycles-pp.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry.start_secondary 33.74 ± 2% -5.1 28.62 perf-profile.calltrace.cycles-pp.page_counter_uncharge.uncharge_batch.__mem_cgroup_uncharge.__folio_put.anon_pipe_read 5.10 -5.1 0.00 perf-profile.calltrace.cycles-pp.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry 7.29 ± 2% -4.9 2.37 ± 2% perf-profile.calltrace.cycles-pp._raw_spin_trylock.rmqueue.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol 3.46 ± 13% -2.1 1.40 ± 3% perf-profile.calltrace.cycles-pp.__memcg_kmem_charge_page.__alloc_frozen_pages_noprof.alloc_pages_mpol.alloc_pages_noprof.anon_pipe_write 2.49 ± 2% -1.9 0.61 ± 9% perf-profile.calltrace.cycles-pp.propagate_protected_usage.page_counter_uncharge.uncharge_batch.__mem_cgroup_uncharge.__folio_put 2.78 ± 4% -0.5 2.31 ± 5% perf-profile.calltrace.cycles-pp.__free_frozen_pages.anon_pipe_read.vfs_read.ksys_read.do_syscall_64 2.40 ± 4% -0.3 2.06 ± 6% perf-profile.calltrace.cycles-pp.free_frozen_page_commit.__free_frozen_pages.anon_pipe_read.vfs_read.ksys_read 0.88 -0.3 0.61 ± 2% perf-profile.calltrace.cycles-pp.anon_pipe_buf_release.anon_pipe_read.vfs_read.ksys_read.do_syscall_64 1.18 ± 2% -0.2 0.98 perf-profile.calltrace.cycles-pp.try_charge_memcg.__memcg_kmem_charge_page.__alloc_frozen_pages_noprof.alloc_pages_mpol.alloc_pages_noprof 0.62 ± 3% -0.2 0.44 ± 44% perf-profile.calltrace.cycles-pp.rmqueue_bulk.__rmqueue_pcplist.rmqueue.get_page_from_freelist.__alloc_frozen_pages_noprof 0.75 ± 2% -0.1 0.62 perf-profile.calltrace.cycles-pp.mutex_unlock.anon_pipe_write.vfs_write.ksys_write.do_syscall_64 0.77 ± 2% -0.1 0.70 ± 3% perf-profile.calltrace.cycles-pp.__rmqueue_pcplist.rmqueue.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol 0.83 ± 7% +0.3 1.10 ± 9% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.free_pcppages_bulk.free_frozen_page_commit.__free_frozen_pages.anon_pipe_read 0.75 ± 8% +0.3 1.07 ± 9% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.free_pcppages_bulk.free_frozen_page_commit.__free_frozen_pages 3.81 ± 3% +2.6 6.39 ± 3% perf-profile.calltrace.cycles-pp._copy_from_iter.copy_page_from_iter.anon_pipe_write.vfs_write.ksys_write 3.86 ± 3% +2.6 6.46 ± 2% perf-profile.calltrace.cycles-pp.copy_page_from_iter.anon_pipe_write.vfs_write.ksys_write.do_syscall_64 91.54 +7.7 99.26 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe 91.53 +7.7 99.26 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe 0.69 ± 6% +10.3 10.96 ± 2% perf-profile.calltrace.cycles-pp.mutex_spin_on_owner.__mutex_lock.anon_pipe_read.vfs_read.ksys_read 0.70 ± 6% +10.4 11.07 ± 2% perf-profile.calltrace.cycles-pp.__mutex_lock.anon_pipe_read.vfs_read.ksys_read.do_syscall_64 25.66 +22.7 48.34 perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe 25.63 +22.7 48.33 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe 25.45 +22.8 48.29 perf-profile.calltrace.cycles-pp.anon_pipe_write.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe 1.56 ± 6% +32.9 34.49 perf-profile.calltrace.cycles-pp.mutex_spin_on_owner.__mutex_lock.anon_pipe_write.vfs_write.ksys_write 1.57 ± 7% +33.0 34.61 perf-profile.calltrace.cycles-pp.__mutex_lock.anon_pipe_write.vfs_write.ksys_write.do_syscall_64 22.78 -15.8 6.97 ± 2% perf-profile.children.cycles-pp.copy_page_to_iter 22.68 -15.8 6.92 ± 2% perf-profile.children.cycles-pp._copy_to_iter 65.72 -14.8 50.87 perf-profile.children.cycles-pp.ksys_read 65.69 -14.8 50.85 perf-profile.children.cycles-pp.vfs_read 65.56 -14.7 50.82 perf-profile.children.cycles-pp.anon_pipe_read 16.62 ± 2% -10.5 6.10 perf-profile.children.cycles-pp.alloc_pages_noprof 16.51 ± 2% -10.4 6.06 perf-profile.children.cycles-pp.alloc_pages_mpol 16.30 ± 2% -10.3 5.97 perf-profile.children.cycles-pp.__alloc_frozen_pages_noprof 12.44 -8.0 4.41 ± 2% perf-profile.children.cycles-pp.get_page_from_freelist 7.81 -7.3 0.52 ± 3% perf-profile.children.cycles-pp.common_startup_64 7.81 -7.3 0.52 ± 3% perf-profile.children.cycles-pp.cpu_startup_entry 7.79 -7.3 0.52 ± 4% perf-profile.children.cycles-pp.do_idle 7.69 -7.2 0.48 ± 5% perf-profile.children.cycles-pp.start_secondary 35.70 ± 2% -6.4 29.29 perf-profile.children.cycles-pp.__folio_put 35.64 ± 2% -6.4 29.25 perf-profile.children.cycles-pp.__mem_cgroup_uncharge 35.50 ± 2% -6.3 29.16 perf-profile.children.cycles-pp.uncharge_batch 9.69 ± 2% -6.1 3.63 ± 2% perf-profile.children.cycles-pp.rmqueue 5.70 -5.3 0.36 ± 4% perf-profile.children.cycles-pp.cpuidle_idle_call 33.79 ± 2% -5.1 28.65 perf-profile.children.cycles-pp.page_counter_uncharge 7.58 ± 2% -5.1 2.51 ± 2% perf-profile.children.cycles-pp._raw_spin_trylock 5.18 -4.8 0.33 ± 5% perf-profile.children.cycles-pp.cpuidle_enter 5.16 -4.8 0.33 ± 5% perf-profile.children.cycles-pp.cpuidle_enter_state 4.50 -4.2 0.25 ± 6% perf-profile.children.cycles-pp.intel_idle 2.56 ± 2% -2.4 0.14 ± 6% perf-profile.children.cycles-pp.__wake_up_common 2.60 ± 2% -2.4 0.23 ± 4% perf-profile.children.cycles-pp.__wake_up_sync_key 3.48 ± 13% -2.1 1.41 ± 3% perf-profile.children.cycles-pp.__memcg_kmem_charge_page 2.20 -2.0 0.20 ± 4% perf-profile.children.cycles-pp.__schedule 2.06 ± 2% -2.0 0.09 ± 6% perf-profile.children.cycles-pp.autoremove_wake_function 2.06 ± 2% -2.0 0.09 ± 6% perf-profile.children.cycles-pp.try_to_wake_up 2.54 ± 37% -1.9 0.60 ± 22% perf-profile.children.cycles-pp.__mod_memcg_state 2.55 ± 2% -1.9 0.63 ± 9% perf-profile.children.cycles-pp.propagate_protected_usage 1.60 -1.4 0.16 ± 5% perf-profile.children.cycles-pp.schedule 1.07 -1.0 0.09 ± 5% perf-profile.children.cycles-pp.flush_smp_call_function_queue 0.90 -0.9 0.02 ± 99% perf-profile.children.cycles-pp.__flush_smp_call_function_queue 0.80 -0.7 0.10 ± 4% perf-profile.children.cycles-pp.__pick_next_task 0.72 ± 2% -0.6 0.10 ± 8% perf-profile.children.cycles-pp.pick_next_task_fair 0.84 ± 15% -0.6 0.28 ± 50% perf-profile.children.cycles-pp.css_rstat_updated 2.81 ± 4% -0.5 2.33 ± 5% perf-profile.children.cycles-pp.__free_frozen_pages 0.48 ± 2% -0.4 0.11 ± 4% perf-profile.children.cycles-pp.sched_balance_rq 0.44 ± 3% -0.4 0.08 ± 5% perf-profile.children.cycles-pp.sched_balance_newidle 2.42 ± 4% -0.4 2.07 ± 6% perf-profile.children.cycles-pp.free_frozen_page_commit 0.42 ± 3% -0.3 0.10 ± 3% perf-profile.children.cycles-pp.sched_balance_find_src_group 0.42 ± 3% -0.3 0.10 ± 5% perf-profile.children.cycles-pp.update_sd_lb_stats 0.76 ± 2% -0.3 0.45 ± 3% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt 0.39 ± 3% -0.3 0.09 ± 4% perf-profile.children.cycles-pp.update_sg_lb_stats 0.89 -0.3 0.61 ± 2% perf-profile.children.cycles-pp.anon_pipe_buf_release 0.65 -0.3 0.39 ± 3% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt 1.18 ± 2% -0.2 0.99 perf-profile.children.cycles-pp.try_charge_memcg 0.54 ± 3% -0.1 0.40 ± 3% perf-profile.children.cycles-pp.__free_one_page 0.48 -0.1 0.35 ± 3% perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt 0.47 -0.1 0.34 ± 3% perf-profile.children.cycles-pp.hrtimer_interrupt 0.22 ± 2% -0.1 0.08 ± 5% perf-profile.children.cycles-pp.handle_softirqs 0.78 -0.1 0.67 ± 2% perf-profile.children.cycles-pp.mutex_unlock 0.13 ± 7% -0.1 0.03 ±102% perf-profile.children.cycles-pp.rest_init 0.13 ± 7% -0.1 0.03 ±102% perf-profile.children.cycles-pp.start_kernel 0.13 ± 7% -0.1 0.03 ±102% perf-profile.children.cycles-pp.x86_64_start_kernel 0.13 ± 7% -0.1 0.03 ±102% perf-profile.children.cycles-pp.x86_64_start_reservations 0.18 ± 5% -0.1 0.09 ± 5% perf-profile.children.cycles-pp.ktime_get_update_offsets_now 0.56 ± 3% -0.1 0.46 perf-profile.children.cycles-pp.page_counter_try_charge 0.13 ± 2% -0.1 0.03 ± 70% perf-profile.children.cycles-pp.__irq_exit_rcu 0.63 ± 3% -0.1 0.54 ± 4% perf-profile.children.cycles-pp.rmqueue_bulk 0.16 ± 3% -0.1 0.07 ± 7% perf-profile.children.cycles-pp.__mod_zone_page_state 0.14 ± 3% -0.1 0.06 ± 19% perf-profile.children.cycles-pp.policy_nodemask 0.10 ± 4% -0.1 0.02 ± 99% perf-profile.children.cycles-pp.do_softirq 0.14 ± 3% -0.1 0.06 ± 6% perf-profile.children.cycles-pp._nohz_idle_balance 0.78 ± 2% -0.1 0.70 ± 3% perf-profile.children.cycles-pp.__rmqueue_pcplist 0.17 ± 4% -0.1 0.10 ± 8% perf-profile.children.cycles-pp.mutex_lock 0.28 ± 2% -0.0 0.24 ± 3% perf-profile.children.cycles-pp.__hrtimer_run_queues 0.27 ± 2% -0.0 0.24 ± 3% perf-profile.children.cycles-pp.tick_nohz_handler 0.11 ± 4% -0.0 0.07 ± 6% perf-profile.children.cycles-pp.uncharge_folio 0.00 +0.1 0.06 ± 6% perf-profile.children.cycles-pp.task_tick_fair 0.91 ± 7% +0.3 1.18 ± 9% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath 3.88 ± 3% +2.6 6.47 ± 3% perf-profile.children.cycles-pp.copy_page_from_iter 3.82 ± 3% +2.6 6.40 ± 3% perf-profile.children.cycles-pp._copy_from_iter 91.63 +7.7 99.34 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe 91.62 +7.7 99.33 perf-profile.children.cycles-pp.do_syscall_64 25.69 +22.7 48.38 perf-profile.children.cycles-pp.ksys_write 25.66 +22.7 48.36 perf-profile.children.cycles-pp.vfs_write 25.48 +22.8 48.30 perf-profile.children.cycles-pp.anon_pipe_write 2.25 ± 6% +43.2 45.46 perf-profile.children.cycles-pp.mutex_spin_on_owner 2.26 ± 6% +43.4 45.68 perf-profile.children.cycles-pp.__mutex_lock 22.59 -15.7 6.89 ± 2% perf-profile.self.cycles-pp._copy_to_iter 7.53 ± 2% -5.1 2.48 ± 2% perf-profile.self.cycles-pp._raw_spin_trylock 4.50 -4.2 0.25 ± 6% perf-profile.self.cycles-pp.intel_idle 31.19 ± 3% -3.3 27.93 perf-profile.self.cycles-pp.page_counter_uncharge 2.76 ± 2% -2.0 0.78 ± 3% perf-profile.self.cycles-pp.get_page_from_freelist 2.50 ± 2% -1.9 0.60 ± 9% perf-profile.self.cycles-pp.propagate_protected_usage 1.38 ± 11% -1.1 0.26 ± 28% perf-profile.self.cycles-pp.__memcg_kmem_charge_page 1.58 ± 3% -1.0 0.55 ± 3% perf-profile.self.cycles-pp.rmqueue 0.83 ± 15% -0.6 0.27 ± 52% perf-profile.self.cycles-pp.css_rstat_updated 0.50 ± 2% -0.4 0.05 perf-profile.self.cycles-pp.__wake_up_common 0.64 ± 5% -0.4 0.24 ± 5% perf-profile.self.cycles-pp.free_frozen_page_commit 0.88 -0.3 0.60 ± 3% perf-profile.self.cycles-pp.anon_pipe_buf_release 0.33 ± 4% -0.3 0.07 perf-profile.self.cycles-pp.update_sg_lb_stats 0.48 -0.2 0.23 ± 3% perf-profile.self.cycles-pp.anon_pipe_read 0.38 ± 9% -0.2 0.15 ± 7% perf-profile.self.cycles-pp.__alloc_frozen_pages_noprof 0.28 -0.1 0.13 ± 3% perf-profile.self.cycles-pp._raw_spin_lock_irqsave 0.39 ± 2% -0.1 0.28 ± 2% perf-profile.self.cycles-pp.anon_pipe_write 0.77 -0.1 0.67 ± 2% perf-profile.self.cycles-pp.mutex_unlock 0.46 ± 3% -0.1 0.36 ± 4% perf-profile.self.cycles-pp.__free_one_page 0.18 ± 5% -0.1 0.09 ± 5% perf-profile.self.cycles-pp.ktime_get_update_offsets_now 0.61 ± 2% -0.1 0.52 perf-profile.self.cycles-pp.try_charge_memcg 0.14 ± 3% -0.1 0.06 ± 8% perf-profile.self.cycles-pp.__mod_zone_page_state 0.31 ± 2% -0.1 0.23 ± 2% perf-profile.self.cycles-pp.rmqueue_bulk 0.10 ± 4% -0.1 0.02 ± 99% perf-profile.self.cycles-pp.policy_nodemask 0.17 ± 4% -0.1 0.10 ± 8% perf-profile.self.cycles-pp.mutex_lock 0.10 ± 3% -0.1 0.03 ± 70% perf-profile.self.cycles-pp.alloc_pages_noprof 0.52 ± 4% -0.1 0.45 perf-profile.self.cycles-pp.page_counter_try_charge 0.19 -0.1 0.13 perf-profile.self.cycles-pp.__free_frozen_pages 0.09 ± 4% -0.1 0.03 ± 70% perf-profile.self.cycles-pp.copy_page_to_iter 0.10 ± 4% -0.0 0.06 ± 7% perf-profile.self.cycles-pp.uncharge_folio 0.08 -0.0 0.06 ± 6% perf-profile.self.cycles-pp.uncharge_batch 0.14 ± 4% +0.0 0.17 ± 2% perf-profile.self.cycles-pp.__rmqueue_pcplist 0.00 +0.2 0.17 ± 2% perf-profile.self.cycles-pp.__mutex_lock 0.91 ± 7% +0.3 1.18 ± 9% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath 3.79 ± 3% +2.6 6.37 ± 2% perf-profile.self.cycles-pp._copy_from_iter 2.24 ± 6% +43.1 45.30 perf-profile.self.cycles-pp.mutex_spin_on_owner 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