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X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 5.8% improvement of stress-ng.timermix.ops_per_sec on: commit: acc071343d29c2361619b05ad50ea3de9ef9a3ac ("posix-timers: Switch to hrtimer_start_expires_user()") https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git timers/core testcase: stress-ng config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory parameters: nr_threads: 100% testtime: 60s test: timermix cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260520/202605202152.78a82417-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: gcc-14/performance/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-icl-2sp8/timermix/stress-ng/60s commit: cfb7fe3fdd ("posix-timers: Handle the timer_[re]arm() return value") acc071343d ("posix-timers: Switch to hrtimer_start_expires_user()") cfb7fe3fdd4ca1d3 acc071343d29c2361619b05ad50 ---------------- --------------------------- %stddev %change %stddev \ | \ 5395 +2.2% 5514 stress-ng.time.percent_of_cpu_this_job_got 2972 +1.8% 3025 stress-ng.time.system_time 266.16 +7.3% 285.49 stress-ng.time.user_time 114645 +5.8% 121264 stress-ng.timermix.CLOCK_BOOTTIME_ticks_per_sec 114659 +5.8% 121273 stress-ng.timermix.CLOCK_MONOTONIC_ticks_per_sec 114862 +5.8% 121481 stress-ng.timermix.CLOCK_REALTIME_ticks_per_sec 114626 +5.8% 121249 stress-ng.timermix.CLOCK_TAI_ticks_per_sec 1.772e+09 +5.8% 1.874e+09 stress-ng.timermix.ops 29540557 +5.8% 31241504 stress-ng.timermix.ops_per_sec 11289 +3.8% 11723 ± 4% proc-vmstat.pgreuse 102.14 ± 7% -12.1% 89.82 ± 4% sched_debug.cfs_rq:/.util_est.stddev 1.764e+09 -14.2% 1.513e+09 turbostat.IRQ 27933279 -14.7% 23829084 vmstat.system.in 13.12 -1.9 11.25 mpstat.cpu.all.irq% 8.19 +0.5 8.66 mpstat.cpu.all.usr% 7349 ± 5% +11.8% 8217 ± 7% numa-meminfo.node0.KernelStack 8073 ± 3% -10.3% 7244 ± 8% numa-meminfo.node1.KernelStack 7350 ± 5% +11.8% 8217 ± 7% numa-vmstat.node0.nr_kernel_stack 8077 ± 3% -10.3% 7243 ± 8% numa-vmstat.node1.nr_kernel_stack 2.919e+10 +2.8% 2.999e+10 perf-stat.i.branch-instructions 0.37 +0.0 0.38 perf-stat.i.branch-miss-rate% 95526350 +8.1% 1.033e+08 perf-stat.i.branch-misses 1.65 -1.6% 1.63 perf-stat.i.cpi 1.332e+11 +1.8% 1.356e+11 perf-stat.i.instructions 0.61 +1.6% 0.62 perf-stat.i.ipc 0.32 +0.0 0.34 perf-stat.overall.branch-miss-rate% 1.66 -1.6% 1.64 perf-stat.overall.cpi 0.60 +1.6% 0.61 perf-stat.overall.ipc 2.873e+10 +2.8% 2.952e+10 perf-stat.ps.branch-instructions 92808849 +8.2% 1.004e+08 perf-stat.ps.branch-misses 1.311e+11 +1.8% 1.335e+11 perf-stat.ps.instructions 8.042e+12 +2.0% 8.206e+12 perf-stat.total.instructions 6.76 ± 2% -5.8 1.00 ± 4% perf-profile.calltrace.cycles-pp.common_hrtimer_rearm.posixtimer_deliver_signal.dequeue_signal.get_signal.arch_do_signal_or_restart 5.23 ± 2% -5.2 0.00 perf-profile.calltrace.cycles-pp.hrtimer_start_range_ns.common_hrtimer_rearm.posixtimer_deliver_signal.dequeue_signal.get_signal 16.47 ± 3% -3.6 12.86 ± 3% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt._raw_spin_unlock_irq.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop 13.31 ± 4% -3.1 10.25 ± 2% perf-profile.calltrace.cycles-pp._raw_spin_unlock_irq.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64 27.02 ± 2% -1.5 25.57 perf-profile.calltrace.cycles-pp.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe 6.74 ± 3% -1.4 5.32 ± 2% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt._raw_spin_unlock_irq.get_signal.arch_do_signal_or_restart 32.05 -1.3 30.80 perf-profile.calltrace.cycles-pp.x64_setup_rt_frame.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe 5.58 ± 3% -1.2 4.40 ± 2% perf-profile.calltrace.cycles-pp.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt._raw_spin_unlock_irq.get_signal 4.17 ± 3% -0.9 3.28 ± 2% perf-profile.calltrace.cycles-pp.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt._raw_spin_unlock_irq 2.23 ± 9% -0.6 1.64 ± 4% perf-profile.calltrace.cycles-pp.posix_timer_fn.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt 1.50 ± 14% -0.6 0.93 ± 4% perf-profile.calltrace.cycles-pp.__hrtimer_rearm_deferred.asm_sysvec_apic_timer_interrupt._raw_spin_unlock_irq.get_signal.arch_do_signal_or_restart 3.54 ± 6% -0.6 2.97 ± 2% perf-profile.calltrace.cycles-pp.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt 4.10 ± 2% -0.4 3.66 ± 3% perf-profile.calltrace.cycles-pp.save_xstate_epilog.get_sigframe.x64_setup_rt_frame.arch_do_signal_or_restart.exit_to_user_mode_loop 1.55 ± 14% -0.3 1.27 ± 16% perf-profile.calltrace.cycles-pp.__get_user_nocheck_8.copy_fpstate_to_sigframe.get_sigframe.x64_setup_rt_frame.arch_do_signal_or_restart 1.00 ± 19% -0.2 0.76 ± 4% perf-profile.calltrace.cycles-pp.clockevents_program_event.__hrtimer_rearm_deferred.asm_sysvec_apic_timer_interrupt._raw_spin_unlock_irq.get_signal 0.68 ± 6% -0.1 0.57 ± 4% perf-profile.calltrace.cycles-pp.native_apic_msr_eoi.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt._raw_spin_unlock_irq 0.70 ± 6% -0.1 0.60 ± 4% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.__get_user_nocheck_8.copy_fpstate_to_sigframe.get_sigframe.x64_setup_rt_frame 0.61 +0.0 0.65 perf-profile.calltrace.cycles-pp.fpregs_mark_activate.fpu__clear_user_states.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64 0.92 +0.0 0.97 perf-profile.calltrace.cycles-pp._copy_to_user.__x64_sys_rt_sigpending.do_syscall_64.entry_SYSCALL_64_after_hwframe.sigpending 1.08 +0.1 1.14 ± 2% perf-profile.calltrace.cycles-pp._copy_from_user.restore_sigcontext.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe 0.94 +0.1 1.00 ± 2% perf-profile.calltrace.cycles-pp._copy_from_user.restore_altstack.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe 0.95 +0.1 1.02 perf-profile.calltrace.cycles-pp.set_current_blocked.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe 1.58 +0.1 1.65 ± 2% perf-profile.calltrace.cycles-pp.__get_user_nocheck_8.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe 1.25 ± 2% +0.1 1.33 ± 2% perf-profile.calltrace.cycles-pp.signal_setup_done.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe 1.86 +0.1 1.96 perf-profile.calltrace.cycles-pp.clear_bhb_loop 1.50 +0.1 1.60 perf-profile.calltrace.cycles-pp.restore_altstack.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe 1.94 +0.1 2.04 perf-profile.calltrace.cycles-pp.clear_bhb_loop.sigpending 2.12 +0.1 2.24 perf-profile.calltrace.cycles-pp.__x64_sys_rt_sigpending.do_syscall_64.entry_SYSCALL_64_after_hwframe.sigpending 2.54 ± 2% +0.1 2.68 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.stress_timermix_timer_action 3.22 +0.2 3.38 perf-profile.calltrace.cycles-pp.fpu__clear_user_states.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe 4.06 ± 2% +0.3 4.33 ± 2% perf-profile.calltrace.cycles-pp.__restore_fpregs_from_user.restore_fpregs_from_user.fpu__restore_sig.restore_sigcontext.__x64_sys_rt_sigreturn 1.74 ± 13% +0.3 2.03 ± 2% perf-profile.calltrace.cycles-pp.check_xstate_in_sigframe.__fpu_restore_sig.fpu__restore_sig.restore_sigcontext.__x64_sys_rt_sigreturn 1.89 ± 13% +0.3 2.21 ± 2% perf-profile.calltrace.cycles-pp.__fpu_restore_sig.fpu__restore_sig.restore_sigcontext.__x64_sys_rt_sigreturn.do_syscall_64 4.88 ± 2% +0.3 5.20 ± 2% perf-profile.calltrace.cycles-pp.restore_fpregs_from_user.fpu__restore_sig.restore_sigcontext.__x64_sys_rt_sigreturn.do_syscall_64 6.14 ± 2% +0.3 6.47 ± 2% perf-profile.calltrace.cycles-pp.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe 0.09 ±223% +0.4 0.53 ± 4% perf-profile.calltrace.cycles-pp.__get_user_nocheck_4.check_xstate_in_sigframe.__fpu_restore_sig.fpu__restore_sig.restore_sigcontext 7.20 ± 2% +0.5 7.70 ± 2% perf-profile.calltrace.cycles-pp.fpu__restore_sig.restore_sigcontext.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe 5.08 ± 6% +0.6 5.71 ± 4% perf-profile.calltrace.cycles-pp.restore_sigcontext.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_timermix_itimer_action 5.16 ± 6% +0.6 5.80 ± 4% perf-profile.calltrace.cycles-pp.__x64_sys_rt_sigreturn.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_timermix_itimer_action 0.00 +0.7 0.73 ± 4% perf-profile.calltrace.cycles-pp.__hrtimer_start_range_ns.hrtimer_start_range_ns_user.posixtimer_deliver_signal.dequeue_signal.get_signal 8.33 ± 2% +1.4 9.75 ± 3% perf-profile.calltrace.cycles-pp.posixtimer_deliver_signal.dequeue_signal.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop 9.56 ± 2% +1.5 11.04 ± 3% perf-profile.calltrace.cycles-pp.dequeue_signal.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64 0.00 +2.5 2.55 ± 2% perf-profile.calltrace.cycles-pp.clockevents_program_event.hrtimer_start_range_ns_user.posixtimer_deliver_signal.dequeue_signal.get_signal 0.00 +5.9 5.88 ± 2% perf-profile.calltrace.cycles-pp.hrtimer_start_range_ns_user.posixtimer_deliver_signal.dequeue_signal.get_signal.arch_do_signal_or_restart 7.27 -5.7 1.56 perf-profile.children.cycles-pp.common_hrtimer_rearm 5.66 -5.7 0.00 perf-profile.children.cycles-pp.hrtimer_start_range_ns 28.66 -4.1 24.51 perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt 16.54 -3.2 13.29 perf-profile.children.cycles-pp._raw_spin_unlock_irq 15.41 -2.2 13.18 perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt 66.67 -2.0 64.63 perf-profile.children.cycles-pp.arch_do_signal_or_restart 67.05 -2.0 65.03 perf-profile.children.cycles-pp.exit_to_user_mode_loop 12.68 -1.8 10.85 perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt 28.28 -1.6 26.66 perf-profile.children.cycles-pp.get_signal 9.56 -1.4 8.18 perf-profile.children.cycles-pp.hrtimer_interrupt 6.42 -1.0 5.41 perf-profile.children.cycles-pp.clockevents_program_event 5.92 -0.8 5.06 perf-profile.children.cycles-pp.__hrtimer_run_queues 28.25 -0.8 27.44 perf-profile.children.cycles-pp.get_sigframe 86.00 -0.8 85.22 perf-profile.children.cycles-pp.do_syscall_64 86.55 -0.8 85.80 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe 32.54 -0.7 31.85 perf-profile.children.cycles-pp.x64_setup_rt_frame 4.02 -0.6 3.43 perf-profile.children.cycles-pp.posix_timer_fn 4.68 ± 3% -0.6 4.10 ± 2% perf-profile.children.cycles-pp.save_xstate_epilog 3.77 -0.5 3.24 perf-profile.children.cycles-pp.__hrtimer_rearm_deferred 19.59 -0.5 19.07 perf-profile.children.cycles-pp.copy_fpstate_to_sigframe 8.64 -0.4 8.24 perf-profile.children.cycles-pp.native_irq_return_iret 2.11 ± 3% -0.4 1.74 ± 2% perf-profile.children.cycles-pp.__put_user_nocheck_4 2.56 -0.4 2.20 perf-profile.children.cycles-pp.native_apic_msr_eoi 1.83 -0.3 1.56 perf-profile.children.cycles-pp.ktime_get_update_offsets_now 1.72 -0.3 1.46 perf-profile.children.cycles-pp.irqtime_account_irq 2.15 -0.3 1.90 perf-profile.children.cycles-pp.__put_user_nocheck_8 4.81 -0.2 4.57 perf-profile.children.cycles-pp.__get_user_nocheck_8 1.30 -0.2 1.11 perf-profile.children.cycles-pp.sched_clock_cpu 1.34 -0.2 1.14 perf-profile.children.cycles-pp.__irq_exit_rcu 1.13 -0.2 0.96 perf-profile.children.cycles-pp.sched_clock 0.90 -0.1 0.76 perf-profile.children.cycles-pp.native_sched_clock 0.65 -0.1 0.53 perf-profile.children.cycles-pp.ktime_expiry_to_cycles 0.88 ± 2% -0.1 0.78 perf-profile.children.cycles-pp.__local_bh_enable_ip 0.23 -0.1 0.13 perf-profile.children.cycles-pp.hrtimer_reprogram 0.53 -0.1 0.44 perf-profile.children.cycles-pp.hrtimer_update_next_event 0.53 ± 2% -0.1 0.45 ± 2% perf-profile.children.cycles-pp.irqentry_exit 0.34 -0.1 0.26 perf-profile.children.cycles-pp.tick_program_event 1.90 -0.1 1.82 perf-profile.children.cycles-pp._raw_spin_lock_irqsave 0.52 -0.1 0.45 perf-profile.children.cycles-pp.error_entry 0.63 -0.0 0.60 perf-profile.children.cycles-pp._raw_spin_unlock_irqrestore 0.20 -0.0 0.17 ± 2% perf-profile.children.cycles-pp.hrtimer_bases_first 0.17 ± 2% -0.0 0.15 ± 2% perf-profile.children.cycles-pp.irq_enter_rcu 0.10 ± 5% -0.0 0.07 ± 6% perf-profile.children.cycles-pp.__hrtimer_reprogram 0.13 ± 3% -0.0 0.12 ± 4% perf-profile.children.cycles-pp.sched_core_idle_cpu 0.16 -0.0 0.14 ± 2% perf-profile.children.cycles-pp.restore_regs_and_return_to_kernel 0.12 ± 4% -0.0 0.11 perf-profile.children.cycles-pp.irqentry_enter 0.21 +0.0 0.22 perf-profile.children.cycles-pp.__irqentry_text_end 0.41 +0.0 0.42 perf-profile.children.cycles-pp.hrtimer_forward 0.30 ± 2% +0.0 0.32 ± 2% perf-profile.children.cycles-pp.__check_object_size 0.14 ± 2% +0.0 0.16 ± 3% perf-profile.children.cycles-pp.rb_erase 0.29 +0.0 0.31 perf-profile.children.cycles-pp.try_to_wake_up 0.29 +0.0 0.31 perf-profile.children.cycles-pp.syscall_return_via_sysret 0.37 +0.0 0.39 perf-profile.children.cycles-pp.timerqueue_linked_add 0.26 +0.0 0.28 perf-profile.children.cycles-pp.do_sigaltstack 0.29 +0.0 0.31 ± 2% perf-profile.children.cycles-pp.posixtimer_queue_sigqueue 0.44 +0.0 0.47 perf-profile.children.cycles-pp.ktime_get_with_offset 0.37 +0.0 0.39 perf-profile.children.cycles-pp.x64_sys_call 0.37 +0.0 0.39 perf-profile.children.cycles-pp.prepare_signal 0.44 ± 3% +0.0 0.47 ± 4% perf-profile.children.cycles-pp.collect_signal 3.29 +0.0 3.32 perf-profile.children.cycles-pp.its_return_thunk 0.51 +0.0 0.54 perf-profile.children.cycles-pp.prandom_u32_state 0.65 +0.0 0.68 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack 2.06 +0.0 2.09 perf-profile.children.cycles-pp._raw_spin_lock_irq 0.74 +0.0 0.79 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack 0.60 ± 2% +0.1 0.65 perf-profile.children.cycles-pp.fpu__alloc_mathframe 1.09 +0.1 1.14 perf-profile.children.cycles-pp.__hrtimer_start_range_ns 0.31 +0.1 0.36 perf-profile.children.cycles-pp.rb_erase_linked 0.75 +0.1 0.81 perf-profile.children.cycles-pp.__get_user_nocheck_4 1.08 +0.1 1.14 perf-profile.children.cycles-pp.complete_signal 1.06 +0.1 1.13 perf-profile.children.cycles-pp.fpregs_mark_activate 1.96 +0.1 2.03 perf-profile.children.cycles-pp.copy_siginfo_to_user 1.04 +0.1 1.11 perf-profile.children.cycles-pp.set_current_blocked 1.91 +0.1 1.98 perf-profile.children.cycles-pp._copy_to_user 1.14 +0.1 1.22 perf-profile.children.cycles-pp.recalc_sigpending 1.23 ± 2% +0.1 1.31 ± 2% perf-profile.children.cycles-pp.rep_stos_alternative 1.36 +0.1 1.44 perf-profile.children.cycles-pp.signal_setup_done 0.57 +0.1 0.66 perf-profile.children.cycles-pp.__remove_hrtimer 1.59 +0.1 1.70 perf-profile.children.cycles-pp.restore_altstack 2.05 +0.1 2.17 perf-profile.children.cycles-pp.entry_SYSCALL_64 2.26 +0.1 2.38 perf-profile.children.cycles-pp.__x64_sys_rt_sigpending 2.10 +0.1 2.23 perf-profile.children.cycles-pp._copy_from_user 2.03 +0.2 2.20 perf-profile.children.cycles-pp.check_xstate_in_sigframe 2.21 +0.2 2.39 perf-profile.children.cycles-pp.__fpu_restore_sig 3.48 +0.2 3.66 perf-profile.children.cycles-pp.fpu__clear_user_states 3.88 +0.2 4.08 perf-profile.children.cycles-pp.clear_bhb_loop 3.27 +0.2 3.51 perf-profile.children.cycles-pp.posixtimer_send_sigqueue 4.34 +0.3 4.63 perf-profile.children.cycles-pp.__restore_fpregs_from_user 5.26 +0.4 5.61 perf-profile.children.cycles-pp.restore_fpregs_from_user 7.66 +0.5 8.21 perf-profile.children.cycles-pp.fpu__restore_sig 9.35 +0.7 10.00 perf-profile.children.cycles-pp.restore_sigcontext 0.41 +0.9 1.26 perf-profile.children.cycles-pp.ktime_get 14.28 +1.0 15.24 perf-profile.children.cycles-pp.__x64_sys_rt_sigreturn 8.99 +1.5 10.52 perf-profile.children.cycles-pp.posixtimer_deliver_signal 10.19 +1.6 11.81 perf-profile.children.cycles-pp.dequeue_signal 0.00 +6.4 6.40 perf-profile.children.cycles-pp.hrtimer_start_range_ns_user 5.78 -0.9 4.88 perf-profile.self.cycles-pp.clockevents_program_event 4.66 -0.8 3.84 perf-profile.self.cycles-pp._raw_spin_unlock_irq 8.64 -0.4 8.24 perf-profile.self.cycles-pp.native_irq_return_iret 2.54 -0.4 2.18 perf-profile.self.cycles-pp.native_apic_msr_eoi 1.78 -0.3 1.52 perf-profile.self.cycles-pp.ktime_get_update_offsets_now 0.86 -0.1 0.73 perf-profile.self.cycles-pp.native_sched_clock 0.85 -0.1 0.72 perf-profile.self.cycles-pp.hrtimer_interrupt 0.60 -0.1 0.49 perf-profile.self.cycles-pp.ktime_expiry_to_cycles 0.75 -0.1 0.65 perf-profile.self.cycles-pp.__hrtimer_run_queues 0.19 -0.1 0.11 ± 3% perf-profile.self.cycles-pp.hrtimer_reprogram 1.78 -0.1 1.71 perf-profile.self.cycles-pp._raw_spin_lock_irqsave 0.49 -0.1 0.42 perf-profile.self.cycles-pp.irqentry_exit 0.30 -0.1 0.23 ± 2% perf-profile.self.cycles-pp.tick_program_event 0.49 -0.1 0.43 perf-profile.self.cycles-pp.error_entry 0.45 -0.1 0.39 perf-profile.self.cycles-pp.asm_sysvec_apic_timer_interrupt 0.40 -0.1 0.34 perf-profile.self.cycles-pp.irqtime_account_irq 1.35 -0.1 1.30 perf-profile.self.cycles-pp.__put_user_nocheck_4 0.33 -0.1 0.28 perf-profile.self.cycles-pp.hrtimer_update_next_event 0.38 -0.1 0.33 perf-profile.self.cycles-pp.sysvec_apic_timer_interrupt 1.44 -0.0 1.39 perf-profile.self.cycles-pp.save_xstate_epilog 0.32 -0.0 0.28 perf-profile.self.cycles-pp.__sysvec_apic_timer_interrupt 0.26 -0.0 0.22 perf-profile.self.cycles-pp.__irq_exit_rcu 0.22 ± 2% -0.0 0.18 ± 2% perf-profile.self.cycles-pp.common_hrtimer_rearm 0.22 -0.0 0.19 ± 2% perf-profile.self.cycles-pp.posix_timer_fn 0.18 ± 2% -0.0 0.15 ± 3% perf-profile.self.cycles-pp.hrtimer_bases_first 0.49 -0.0 0.46 perf-profile.self.cycles-pp._raw_spin_unlock_irqrestore 0.19 -0.0 0.16 ± 2% perf-profile.self.cycles-pp.__hrtimer_rearm_deferred 0.18 ± 2% -0.0 0.15 perf-profile.self.cycles-pp.sched_clock_cpu 0.18 -0.0 0.16 ± 2% perf-profile.self.cycles-pp.sched_clock 0.12 ± 3% -0.0 0.10 perf-profile.self.cycles-pp.restore_regs_and_return_to_kernel 0.10 ± 4% -0.0 0.09 perf-profile.self.cycles-pp.irqentry_enter 0.10 ± 4% -0.0 0.09 perf-profile.self.cycles-pp.sched_core_idle_cpu 0.07 ± 5% -0.0 0.06 perf-profile.self.cycles-pp.__hrtimer_reprogram 0.09 -0.0 0.08 perf-profile.self.cycles-pp.irq_enter_rcu 0.19 +0.0 0.20 perf-profile.self.cycles-pp.__irqentry_text_end 0.18 +0.0 0.19 ± 2% perf-profile.self.cycles-pp.set_current_blocked 0.12 ± 4% +0.0 0.13 perf-profile.self.cycles-pp.rb_erase 0.18 ± 2% +0.0 0.19 perf-profile.self.cycles-pp.__fpu_restore_sig 0.16 ± 3% +0.0 0.17 perf-profile.self.cycles-pp.kick_process 0.28 +0.0 0.29 perf-profile.self.cycles-pp.restore_altstack 0.24 ± 2% +0.0 0.25 perf-profile.self.cycles-pp.do_sigaltstack 0.30 +0.0 0.32 perf-profile.self.cycles-pp.fpu__alloc_mathframe 0.21 +0.0 0.23 perf-profile.self.cycles-pp.fpu__restore_sig 0.36 +0.0 0.38 perf-profile.self.cycles-pp.hrtimer_forward 0.27 +0.0 0.29 perf-profile.self.cycles-pp.timerqueue_linked_add 0.27 +0.0 0.29 perf-profile.self.cycles-pp.try_to_wake_up 0.29 +0.0 0.31 perf-profile.self.cycles-pp.syscall_return_via_sysret 0.27 +0.0 0.29 perf-profile.self.cycles-pp.signal_setup_done 0.26 +0.0 0.28 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack 0.35 +0.0 0.37 perf-profile.self.cycles-pp.exit_to_user_mode_loop 0.12 +0.0 0.14 perf-profile.self.cycles-pp.sigismember 0.32 +0.0 0.34 perf-profile.self.cycles-pp.x64_sys_call 0.54 +0.0 0.56 perf-profile.self.cycles-pp.arch_do_signal_or_restart 0.39 +0.0 0.41 perf-profile.self.cycles-pp.dequeue_signal 0.25 +0.0 0.27 ± 2% perf-profile.self.cycles-pp.posixtimer_queue_sigqueue 0.44 +0.0 0.46 perf-profile.self.cycles-pp.ktime_get_with_offset 0.35 +0.0 0.37 perf-profile.self.cycles-pp.prepare_signal 0.65 +0.0 0.67 perf-profile.self.cycles-pp.__hrtimer_start_range_ns 0.47 +0.0 0.49 perf-profile.self.cycles-pp.prandom_u32_state 0.37 +0.0 0.40 perf-profile.self.cycles-pp.restore_fpregs_from_user 0.54 +0.0 0.57 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe 0.56 +0.0 0.59 perf-profile.self.cycles-pp.__x64_sys_rt_sigreturn 0.48 +0.0 0.52 perf-profile.self.cycles-pp.__x64_sys_rt_sigpending 0.42 ± 3% +0.0 0.45 ± 4% perf-profile.self.cycles-pp.collect_signal 0.16 +0.0 0.19 perf-profile.self.cycles-pp.rb_erase_linked 0.56 +0.0 0.59 perf-profile.self.cycles-pp.rep_stos_alternative 0.26 +0.0 0.30 perf-profile.self.cycles-pp.__remove_hrtimer 0.58 +0.0 0.61 perf-profile.self.cycles-pp.complete_signal 1.91 +0.0 1.94 perf-profile.self.cycles-pp._raw_spin_lock_irq 0.71 +0.0 0.75 perf-profile.self.cycles-pp.copy_siginfo_to_user 0.48 +0.0 0.52 perf-profile.self.cycles-pp.restore_sigcontext 0.72 +0.0 0.77 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack 0.88 +0.0 0.93 perf-profile.self.cycles-pp.entry_SYSCALL_64 1.36 +0.0 1.41 perf-profile.self.cycles-pp.get_signal 1.80 +0.1 1.86 perf-profile.self.cycles-pp.its_return_thunk 3.51 +0.1 3.56 perf-profile.self.cycles-pp.__get_user_nocheck_8 0.73 +0.1 0.79 perf-profile.self.cycles-pp.__get_user_nocheck_4 0.85 +0.1 0.91 perf-profile.self.cycles-pp.fpregs_mark_activate 1.28 +0.1 1.35 perf-profile.self.cycles-pp.do_syscall_64 0.79 +0.1 0.86 perf-profile.self.cycles-pp.posixtimer_deliver_signal 1.24 +0.1 1.31 perf-profile.self.cycles-pp.sigpending 0.79 +0.1 0.86 perf-profile.self.cycles-pp.posixtimer_send_sigqueue 1.08 +0.1 1.16 perf-profile.self.cycles-pp.recalc_sigpending 1.79 +0.1 1.87 perf-profile.self.cycles-pp._copy_to_user 1.18 +0.1 1.28 perf-profile.self.cycles-pp.check_xstate_in_sigframe 1.76 +0.1 1.87 perf-profile.self.cycles-pp.get_sigframe 2.05 +0.1 2.18 perf-profile.self.cycles-pp._copy_from_user 2.88 +0.2 3.04 perf-profile.self.cycles-pp.fpu__clear_user_states 3.84 +0.2 4.04 perf-profile.self.cycles-pp.clear_bhb_loop 6.77 +0.3 7.04 perf-profile.self.cycles-pp.copy_fpstate_to_sigframe 4.30 +0.3 4.59 perf-profile.self.cycles-pp.__restore_fpregs_from_user 0.00 +0.7 0.65 perf-profile.self.cycles-pp.hrtimer_start_range_ns_user 0.40 +0.8 1.23 perf-profile.self.cycles-pp.ktime_get 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