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pinned timers separate from the others") https://git.kernel.org/cgit/linux/kernel/git/frederic/linux-dynticks.git timers/anna testcase: unixbench test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-10980XE CPU @ 3.00GHz (Cascade Lake) with 128G memory parameters: runtime: 300s nr_task: 1 test: syscall cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240222/202402221047.8338ced3-oliver.sang@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase: gcc-12/performance/x86_64-rhel-8.3/1/debian-11.1-x86_64-20220510.cgz/300s/lkp-csl-d02/syscall/unixbench commit: f2234c1add ("timers: Split next timer interrupt logic") 5bbb5400a9 ("timers: Keep the pinned timers separate from the others") f2234c1add92fe1b 5bbb5400a9f70dae4069290b581 ---------------- --------------------------- %stddev %change %stddev \ | \ 3.99 ± 8% +14.4% 4.57 ± 8% perf-sched.wait_time.avg.ms.rcu_gp_kthread.kthread.ret_from_fork.ret_from_fork_asm 2744609 +2.1% 2801712 unixbench.throughput 1.071e+09 +2.0% 1.093e+09 unixbench.workload 2.65 ± 10% -0.5 2.12 ± 8% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.umask 0.29 ±100% +0.4 0.67 ± 7% perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.syscall 0.29 ±101% +0.4 0.70 ± 10% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.getuid 0.00 +0.2 0.21 ± 15% perf-profile.children.cycles-pp.__get_next_timer_interrupt 5.67 ± 12% -2.4 3.24 ± 6% perf-profile.self.cycles-pp.do_syscall_64 0.00 +0.1 0.09 ± 14% perf-profile.self.cycles-pp.__get_next_timer_interrupt 6.425e+08 +1.8% 6.539e+08 perf-stat.i.branch-instructions 9.814e+08 +1.9% 9.997e+08 perf-stat.i.dTLB-loads 6.276e+08 +1.9% 6.397e+08 perf-stat.i.dTLB-stores 325643 ± 2% +7.6% 350447 ± 3% perf-stat.i.iTLB-loads 3.314e+09 +1.8% 3.372e+09 perf-stat.i.instructions 555.44 +3.8% 576.68 perf-stat.i.instructions-per-iTLB-miss 0.75 +1.8% 0.76 perf-stat.i.ipc 62.51 +1.9% 63.67 perf-stat.i.metric.M/sec 1.25 -1.7% 1.22 perf-stat.overall.cpi 0.80 +1.7% 0.82 perf-stat.overall.ipc 6.408e+08 +1.8% 6.522e+08 perf-stat.ps.branch-instructions 9.789e+08 +1.9% 9.971e+08 perf-stat.ps.dTLB-loads 6.259e+08 +1.9% 6.381e+08 perf-stat.ps.dTLB-stores 324768 ± 2% +7.6% 349509 ± 3% perf-stat.ps.iTLB-loads 3.305e+09 +1.8% 3.363e+09 perf-stat.ps.instructions 1.292e+12 +1.8% 1.315e+12 perf-stat.total.instructions 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