プロファイラ開発者と見る「推測するな、計測せよ」 - YAPC::Hakodate 2024

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PTZPZVc:"1$)BLPEBUF ϓϩϑΝΠϥ։ൃऀͱݟΔ ʮਪଌ͢ΔͳɺܭଌͤΑʯ

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Χʔωϧ͔Β΋औΕΔ৘ใ͍Ζ͍Ζ % ls /proc/sys/kernel acct hung_task_warnings ostype random softlockup_panic acpi_video_flags io_delay_type overflowgid randomize_va_space soft_watchdog arch io_uring_disabled overflowuid real-root-dev split_lock_mitigate auto_msgmni io_uring_group panic sched_autogroup_enabled stack_tracer_enabled bootloader_type kexec_load_disabled panic_on_io_nmi sched_cfs_bandwidth_slice_us sysctl_writes_strict bootloader_version kexec_load_limit_panic panic_on_oops sched_deadline_period_max_us sysrq bpf_stats_enabled kexec_load_limit_reboot panic_on_rcu_stall sched_deadline_period_min_us tainted cad_pid keys panic_on_unrecovered_nmi sched_energy_aware task_delayacct cap_last_cap kptr_restrict panic_on_warn sched_itmt_enabled threads-max core_pattern max_lock_depth panic_print sched_rr_timeslice_ms timer_migration core_pipe_limit max_rcu_stall_to_panic perf_cpu_time_max_percent sched_rt_period_us traceoff_on_warning core_uses_pid modprobe perf_event_max_contexts_per_stack sched_rt_runtime_us tracepoint_printk ctrl-alt-del modules_disabled perf_event_max_sample_rate sched_schedstats unknown_nmi_panic dmesg_restrict msgmax perf_event_max_stack sched_util_clamp_max unprivileged_bpf_disabled domainname msgmnb perf_event_mlock_kb sched_util_clamp_min unprivileged_userns_clone ftrace_dump_on_oops msgmni perf_event_paranoid sched_util_clamp_min_rt_default user_events_max ftrace_enabled msg_next_id pid_max seccomp usermodehelper hardlockup_all_cpu_backtrace ngroups_max poweroff_cmd sem version hardlockup_panic nmi_watchdog print-fatal-signals sem_next_id warn_limit hostname ns_last_pid printk shmall watchdog hung_task_all_cpu_backtrace numa_balancing printk_delay shmmax watchdog_cpumask hung_task_check_count numa_balancing_promote_rate_limit_MBps printk_devkmsg shmmni watchdog_thresh hung_task_check_interval_secs oops_all_cpu_backtrace printk_ratelimit shm_next_id yama hung_task_panic oops_limit printk_ratelimit_burst shm_rmid_forced hung_task_timeout_secs osrelease pty softlockup_all_cpu_backtrace

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