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rk+REN+rC1OsiBbThr6ghIiwHazQGDwogTWhzh94ZIplEa2x6tnqc6mbUM1oaqngJfv4irjqqCYB3JVzy3gUVQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR11MB4753 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 97.8% regression of will-it-scale.per_thread_ops on: commit: 99b9906f6cb6c689ccccef3b8e0a7a5af7f80960 ("futex: Allow automatic allocation of process wide futex hash.") https://git.kernel.org/cgit/linux/kernel/git/bigeasy/staging.git futex_local_v6 testcase: will-it-scale config: x86_64-rhel-9.4 compiler: gcc-12 test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 512G memory parameters: nr_task: 100% mode: thread test: futex4 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/202412311453.4232da5f-lkp@intel.com Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241231/202412311453.4232da5f-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase: gcc-12/performance/x86_64-rhel-9.4/thread/100%/debian-12-x86_64-20240206.cgz/lkp-spr-2sp4/futex4/will-it-scale commit: 1cb2a2d0d7 ("futex: Add basic infrastructure for local task local hash.") 99b9906f6c ("futex: Allow automatic allocation of process wide futex hash.") 1cb2a2d0d7bad8ea 99b9906f6cb6c689ccccef3b8e0 ---------------- --------------------------- %stddev %change %stddev \ | \ 137104 ± 4% +32.0% 181042 ± 5% meminfo.Mapped 1181264 +11.2% 1314118 meminfo.Shmem 72.61 +34.8% 97.86 vmstat.cpu.sy 25.61 -96.1% 0.99 vmstat.cpu.us 1.156e+09 -97.8% 25626505 will-it-scale.224.threads 5159474 -97.8% 114403 will-it-scale.per_thread_ops 1.156e+09 -97.8% 25626505 will-it-scale.workload 0.42 ± 4% -0.1 0.34 mpstat.cpu.all.irq% 0.01 ± 6% -0.0 0.00 ± 10% mpstat.cpu.all.soft% 72.43 +25.9 98.35 mpstat.cpu.all.sys% 25.90 -25.2 0.67 mpstat.cpu.all.usr% 14.50 ± 21% +1918.4% 292.67 ± 10% perf-c2c.DRAM.local 712.67 ± 49% +25244.0% 180618 ± 3% perf-c2c.DRAM.remote 575.17 ± 27% +41178.0% 237417 ± 2% perf-c2c.HITM.local 677.50 ± 51% +25438.2% 173021 ± 3% perf-c2c.HITM.remote 1252 ± 28% +32665.2% 410438 ± 3% perf-c2c.HITM.total 229056 ± 66% +168.1% 614175 ± 21% numa-meminfo.node0.Active 229056 ± 66% +168.1% 614175 ± 21% numa-meminfo.node0.Active(anon) 1731085 ± 8% -14.4% 1481532 ± 9% numa-meminfo.node1.Active 1731085 ± 8% -14.4% 1481532 ± 9% numa-meminfo.node1.Active(anon) 169873 ± 56% -54.8% 76863 ±135% numa-meminfo.node1.AnonHugePages 69383 ± 52% +82.5% 126612 ± 27% numa-meminfo.node1.Mapped 57260 ± 66% +168.2% 153546 ± 21% numa-vmstat.node0.nr_active_anon 57259 ± 66% +168.2% 153546 ± 21% numa-vmstat.node0.nr_zone_active_anon 432835 ± 8% -14.4% 370456 ± 9% numa-vmstat.node1.nr_active_anon 82.98 ± 56% -54.7% 37.56 ±135% numa-vmstat.node1.nr_anon_transparent_hugepages 17168 ± 53% +85.9% 31921 ± 27% numa-vmstat.node1.nr_mapped 432834 ± 8% -14.4% 370456 ± 9% numa-vmstat.node1.nr_zone_active_anon 63231066 ± 14% -23.1% 48613348 ± 3% sched_debug.cfs_rq:/.avg_vruntime.max 63231066 ± 14% -23.1% 48613348 ± 3% sched_debug.cfs_rq:/.min_vruntime.max 2363398 ± 76% -48.5% 1217003 ± 12% sched_debug.cpu.avg_idle.max 152445 ± 64% -40.5% 90724 ± 13% sched_debug.cpu.avg_idle.stddev 680860 ± 33% -21.7% 532874 ± 3% sched_debug.cpu.max_idle_balance_cost.max 13728 ±103% -74.6% 3490 ± 69% sched_debug.cpu.max_idle_balance_cost.stddev 490095 +6.9% 524105 proc-vmstat.nr_active_anon 1171706 +2.8% 1204774 proc-vmstat.nr_file_pages 34114 ± 4% +32.9% 45347 ± 5% proc-vmstat.nr_mapped 295322 +11.2% 328395 proc-vmstat.nr_shmem 490095 +6.9% 524105 proc-vmstat.nr_zone_active_anon 1714481 +2.8% 1761991 proc-vmstat.numa_hit 1482692 +3.2% 1530183 proc-vmstat.numa_local 38309 ± 18% -44.4% 21282 ± 29% proc-vmstat.numa_pages_migrated 38309 ± 18% -44.4% 21282 ± 29% proc-vmstat.pgmigrate_success 0.00 ± 20% +95.5% 0.01 ± 23% perf-sched.sch_delay.avg.ms.ipmi_thread.kthread.ret_from_fork.ret_from_fork_asm 0.09 ± 58% -96.7% 0.00 ±180% perf-sched.sch_delay.avg.ms.irqentry_exit_to_user_mode.asm_sysvec_call_function_single.[unknown].[unknown] 0.00 +54.2% 0.01 ± 17% perf-sched.sch_delay.avg.ms.schedule_timeout.kcompactd.kthread.ret_from_fork 0.00 +66.7% 0.01 ± 7% perf-sched.sch_delay.avg.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 0.01 ± 7% +6803.4% 0.67 ± 69% perf-sched.sch_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm 0.00 ± 27% +139.1% 0.01 ± 26% perf-sched.sch_delay.max.ms.ipmi_thread.kthread.ret_from_fork.ret_from_fork_asm 5.59 ± 30% -39.8% 3.36 ± 42% perf-sched.sch_delay.max.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown] 1.81 ± 75% -99.7% 0.00 ±187% perf-sched.sch_delay.max.ms.irqentry_exit_to_user_mode.asm_sysvec_call_function_single.[unknown].[unknown] 0.01 ± 7% +151.6% 0.01 ± 15% perf-sched.sch_delay.max.ms.schedule_timeout.kcompactd.kthread.ret_from_fork 2.93 ± 4% -100.0% 0.00 perf-sched.wait_and_delay.avg.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown] 12.18 ± 7% -46.2% 6.55 ± 4% perf-sched.wait_and_delay.avg.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 613.33 ± 4% -100.0% 0.00 perf-sched.wait_and_delay.count.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown] 391.67 ± 5% +95.9% 767.17 ± 4% perf-sched.wait_and_delay.count.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 863.81 +110.2% 1815 ± 37% perf-sched.wait_and_delay.max.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call 11.17 ± 30% -100.0% 0.00 perf-sched.wait_and_delay.max.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown] 454.33 ± 6% -28.3% 325.83 ± 10% perf-sched.wait_and_delay.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 0.09 ± 58% -96.7% 0.00 ±180% perf-sched.wait_time.avg.ms.irqentry_exit_to_user_mode.asm_sysvec_call_function_single.[unknown].[unknown] 2.86 ± 10% -30.5% 1.99 perf-sched.wait_time.avg.ms.rcu_gp_kthread.kthread.ret_from_fork.ret_from_fork_asm 12.17 ± 7% -46.2% 6.55 ± 4% perf-sched.wait_time.avg.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 863.81 +110.2% 1815 ± 37% perf-sched.wait_time.max.ms.do_task_dead.do_exit.do_group_exit.__x64_sys_exit_group.x64_sys_call 5.59 ± 30% -39.8% 3.36 ± 42% perf-sched.wait_time.max.ms.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt.[unknown].[unknown] 1.81 ± 75% -99.7% 0.00 ±187% perf-sched.wait_time.max.ms.irqentry_exit_to_user_mode.asm_sysvec_call_function_single.[unknown].[unknown] 5.00 -53.4% 2.33 ± 32% perf-sched.wait_time.max.ms.rcu_gp_kthread.kthread.ret_from_fork.ret_from_fork_asm 454.32 ± 6% -28.3% 325.82 ± 10% perf-sched.wait_time.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 0.02 ±108% +5957.2% 1.40 perf-stat.i.MPKI 1.092e+11 -87.4% 1.373e+10 perf-stat.i.branch-instructions 0.03 ± 72% +0.2 0.26 perf-stat.i.branch-miss-rate% 8332453 +314.7% 34555257 perf-stat.i.branch-misses 2840046 ± 77% +2954.6% 86752119 perf-stat.i.cache-misses 9562648 ± 32% +1852.1% 1.867e+08 perf-stat.i.cache-references 0.89 +1072.3% 10.39 perf-stat.i.cpi 294.53 -4.9% 280.02 perf-stat.i.cpu-migrations 560955 ± 57% -98.7% 7456 perf-stat.i.cycles-between-cache-misses 7.327e+11 -91.5% 6.224e+10 perf-stat.i.instructions 1.13 -91.3% 0.10 perf-stat.i.ipc 0.00 ± 77% +35611.7% 1.39 perf-stat.overall.MPKI 0.01 ± 2% +0.2 0.25 perf-stat.overall.branch-miss-rate% 0.88 +1083.5% 10.40 perf-stat.overall.cpi 367727 ± 50% -98.0% 7462 perf-stat.overall.cycles-between-cache-misses 1.14 -91.6% 0.10 perf-stat.overall.ipc 192321 +280.7% 732210 perf-stat.overall.path-length 1.088e+11 -87.4% 1.369e+10 perf-stat.ps.branch-instructions 8267617 +316.3% 34415093 perf-stat.ps.branch-misses 2845099 ± 77% +2939.7% 86483187 perf-stat.ps.cache-misses 9576433 ± 32% +1844.0% 1.862e+08 perf-stat.ps.cache-references 292.67 -4.8% 278.67 perf-stat.ps.cpu-migrations 7.301e+11 -91.5% 6.204e+10 perf-stat.ps.instructions 2.223e+14 -91.6% 1.876e+13 perf-stat.total.instructions 30.26 -30.3 0.00 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall 9.36 -9.4 0.00 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall 4.89 -2.7 2.21 ± 4% perf-profile.calltrace.cycles-pp.futex_q_unlock.futex_wait_setup.__futex_wait.futex_wait.do_futex 91.58 +7.8 99.41 perf-profile.calltrace.cycles-pp.syscall 66.02 +33.0 98.98 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall 63.05 +35.9 98.92 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall 46.61 +52.0 98.58 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall 43.11 +55.4 98.51 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall 40.51 +57.9 98.45 perf-profile.calltrace.cycles-pp.futex_wait.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe 36.03 +62.3 98.37 perf-profile.calltrace.cycles-pp.__futex_wait.futex_wait.do_futex.__x64_sys_futex.do_syscall_64 30.30 +67.9 98.25 perf-profile.calltrace.cycles-pp.futex_wait_setup.__futex_wait.futex_wait.do_futex.__x64_sys_futex 10.94 +84.8 95.72 perf-profile.calltrace.cycles-pp.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait.do_futex 3.54 +91.2 94.70 perf-profile.calltrace.cycles-pp._raw_spin_lock.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait 0.00 +94.5 94.51 perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.futex_q_lock.futex_wait_setup.__futex_wait 16.73 -16.4 0.37 perf-profile.children.cycles-pp.entry_SYSCALL_64 9.92 -9.7 0.22 perf-profile.children.cycles-pp.syscall_exit_to_user_mode 7.78 -7.6 0.19 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack 3.81 -3.7 0.08 perf-profile.children.cycles-pp.futex_hash 5.09 -2.9 2.21 ± 4% perf-profile.children.cycles-pp.futex_q_unlock 2.80 -2.7 0.07 perf-profile.children.cycles-pp.get_futex_key 2.64 -2.6 0.05 perf-profile.children.cycles-pp.x64_sys_call 2.38 -2.3 0.06 perf-profile.children.cycles-pp.syscall_return_via_sysret 0.36 ± 4% -0.1 0.24 ± 11% perf-profile.children.cycles-pp.__cmd_record 0.36 ± 4% -0.1 0.24 ± 11% perf-profile.children.cycles-pp.cmd_record 0.36 ± 4% -0.1 0.24 ± 11% perf-profile.children.cycles-pp.record__mmap_read_evlist 0.36 ± 4% -0.1 0.24 ± 10% perf-profile.children.cycles-pp.handle_internal_command 0.36 ± 4% -0.1 0.24 ± 10% perf-profile.children.cycles-pp.main 0.36 ± 4% -0.1 0.24 ± 10% perf-profile.children.cycles-pp.run_builtin 0.34 ± 5% -0.1 0.23 ± 11% perf-profile.children.cycles-pp.perf_mmap__push 0.22 ± 4% -0.1 0.12 ± 7% perf-profile.children.cycles-pp.record__pushfn 0.22 ± 5% -0.1 0.13 ± 10% perf-profile.children.cycles-pp.writen 0.22 ± 4% -0.1 0.13 ± 10% perf-profile.children.cycles-pp.write 0.47 ± 6% -0.1 0.39 ± 2% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt 0.19 ± 5% -0.1 0.11 ± 11% perf-profile.children.cycles-pp.ksys_write 0.44 ± 6% -0.1 0.36 ± 3% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt 0.42 ± 6% -0.1 0.34 ± 3% perf-profile.children.cycles-pp.hrtimer_interrupt 0.43 ± 6% -0.1 0.35 ± 3% perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt 0.18 ± 5% -0.1 0.10 ± 9% perf-profile.children.cycles-pp.vfs_write 0.17 ± 6% -0.1 0.10 ± 11% perf-profile.children.cycles-pp.shmem_file_write_iter 0.16 ± 6% -0.1 0.09 ± 9% perf-profile.children.cycles-pp.generic_perform_write 0.11 ± 11% -0.0 0.07 ± 10% perf-profile.children.cycles-pp.ktime_get 0.11 ± 14% -0.0 0.08 ± 7% perf-profile.children.cycles-pp.clockevents_program_event 0.24 ± 5% -0.0 0.22 ± 3% perf-profile.children.cycles-pp.tick_nohz_handler 0.25 ± 4% -0.0 0.22 ± 3% perf-profile.children.cycles-pp.__hrtimer_run_queues 0.07 ± 5% -0.0 0.04 ± 45% perf-profile.children.cycles-pp.ring_buffer_read_head 0.09 ± 4% -0.0 0.06 ± 7% perf-profile.children.cycles-pp.get_jiffies_update 0.09 ± 4% -0.0 0.06 ± 7% perf-profile.children.cycles-pp.tmigr_requires_handle_remote 0.08 ± 6% -0.0 0.06 ± 13% perf-profile.children.cycles-pp.perf_mmap__read_head 0.21 ± 3% -0.0 0.19 ± 3% perf-profile.children.cycles-pp.update_process_times 98.27 +1.4 99.72 perf-profile.children.cycles-pp.syscall 66.44 +32.7 99.11 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe 64.06 +35.0 99.06 perf-profile.children.cycles-pp.do_syscall_64 47.21 +51.4 98.59 perf-profile.children.cycles-pp.__x64_sys_futex 43.97 +54.6 98.53 perf-profile.children.cycles-pp.do_futex 40.72 +57.7 98.46 perf-profile.children.cycles-pp.futex_wait 36.50 +61.9 98.38 perf-profile.children.cycles-pp.__futex_wait 31.35 +66.9 98.27 perf-profile.children.cycles-pp.futex_wait_setup 11.59 +84.1 95.73 perf-profile.children.cycles-pp.futex_q_lock 3.73 +91.0 94.73 perf-profile.children.cycles-pp._raw_spin_lock 0.03 ±147% +94.5 94.54 perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath 17.41 -17.0 0.38 perf-profile.self.cycles-pp.syscall 12.41 -12.1 0.28 perf-profile.self.cycles-pp.futex_wait_setup 8.53 -8.3 0.19 perf-profile.self.cycles-pp.syscall_exit_to_user_mode 7.57 -7.4 0.18 ± 2% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack 5.08 -5.0 0.10 ± 4% perf-profile.self.cycles-pp.__futex_wait 4.61 -4.5 0.10 perf-profile.self.cycles-pp.do_syscall_64 3.60 -3.5 0.08 perf-profile.self.cycles-pp.futex_hash 3.54 -3.5 0.07 perf-profile.self.cycles-pp.do_futex 3.55 -3.3 0.20 ± 3% perf-profile.self.cycles-pp._raw_spin_lock 3.31 -3.2 0.07 perf-profile.self.cycles-pp.futex_wait 3.24 -3.2 0.06 perf-profile.self.cycles-pp.__x64_sys_futex 3.19 -3.1 0.07 perf-profile.self.cycles-pp.entry_SYSCALL_64 3.97 ± 3% -3.1 0.92 ± 2% perf-profile.self.cycles-pp.futex_q_lock 4.82 -2.6 2.20 ± 4% perf-profile.self.cycles-pp.futex_q_unlock 2.56 -2.5 0.06 perf-profile.self.cycles-pp.get_futex_key 2.55 -2.5 0.05 ± 7% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe 2.38 -2.3 0.06 perf-profile.self.cycles-pp.syscall_return_via_sysret 2.34 -2.3 0.02 ± 99% perf-profile.self.cycles-pp.x64_sys_call 0.06 ± 7% -0.0 0.03 ±100% perf-profile.self.cycles-pp.ring_buffer_read_head 0.10 ± 15% -0.0 0.07 ± 8% perf-profile.self.cycles-pp.ktime_get 0.09 ± 4% -0.0 0.06 ± 7% perf-profile.self.cycles-pp.get_jiffies_update 0.03 ±147% +94.1 94.18 perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath 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