/proc/<PID>/schedLinux 파일의 측정항목에 대한 측정 단위가 무엇인지 아는 사람이 있습니까?
cat /proc/1277/sched
flush-202:32 (1277, #threads: 1)
---------------------------------------------------------
se.exec_start : 7969759448.265086
se.vruntime : 282810360.009524
se.sum_exec_runtime : 121710.613450
se.statistics.wait_start : 0.000000
se.statistics.sleep_start : 7969759448.265086
se.statistics.block_start : 0.000000
se.statistics.sleep_max : 5005.885001
se.statistics.block_max : 9270.821298
se.statistics.exec_max : 3.988085
se.statistics.slice_max : 12.407345
se.statistics.wait_max : 12.008414
se.statistics.wait_sum : 11067.153244
se.statistics.wait_count : 1611854
se.statistics.iowait_sum : 12593.039209
se.statistics.iowait_count : 2
se.nr_migrations : 17755
se.statistics.nr_migrations_cold : 0
se.statistics.nr_failed_migrations_affine: 0
se.statistics.nr_failed_migrations_running: 58593
se.statistics.nr_failed_migrations_hot: 2
se.statistics.nr_forced_migrations : 0
se.statistics.nr_wakeups : 1593915
se.statistics.nr_wakeups_sync : 0
se.statistics.nr_wakeups_migrate : 0
se.statistics.nr_wakeups_local : 1593912
se.statistics.nr_wakeups_remote : 3
se.statistics.nr_wakeups_affine : 0
se.statistics.nr_wakeups_affine_attempts: 3
se.statistics.nr_wakeups_passive : 0
se.statistics.nr_wakeups_idle : 0
avg_atom : 0.076350
avg_per_cpu : 6.855004
nr_switches : 1594100
nr_voluntary_switches : 1593916
nr_involuntary_switches : 184
se.load.weight : 1024
policy : 0
prio : 120
clock-delta : 129
계산은 거의 자명하지만 시간은 그렇지 않습니다. 초, 밀리초, 마이크로초인가요? 특히 관심이 있어요
se.statistics.iowait_sum : 12593.039209
감사해요!
답변1
값은 밀리초 단위로 표시되며 나노초 단위로 추적되며 수백만 단위로 확장됩니다(참조).kernel/sched/debug.c). 그래서
se.statistics.iowait_sum : 12593.039209
프로세스가 I/O를 기다리는 데 12.5초가 조금 넘게 소요되었음을 나타냅니다.