Current /proc/sched_debug can be improved by
- Improving the format of runnable tasks when CONFIG_SCHEDSTATS is not enabled.
- Adding sum_exec info even when CONFIG_SCHEDSTATS is not enabled.
- Removing duplicate information from runnable tasks.
- Adding wait-time info.
Further we could collect sum_sleep_time in /proc/<pid>/schedstat.
Current /proc/sched_debug when CONFIG_SCHEDSTATS is not enabled
runnable tasks:
task PID tree-key switches prio exec-runtime
sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
watchdog/31 223 -11.998676 211 0 0
0 0.000000 0.000000 0.000000 0 /
migration/31 224 0.000000 140 0 0
0 0.000000 0.000000 0.000000 0 /
ksoftirqd/31 225 -13.047772 3 120 0
0 0.000000 0.000000 0.000000 0 /
kworker/31:0H 227 3377.042323 9 100 0
0 0.000000 0.000000 0.000000 0 /
kworker/31:1 286 3306.213547 146 120 0
0 0.000000 0.000000 0.000000 0 /
kworker/u129:3 1476 3250.397029 2 100 0
0 0.000000 0.000000 0.000000 0 /
systemd-logind 1548 0.110774 182 120 0
0 0.000000 0.000000 0.000000 0
/autogroup-60
rtas_errd 1577 0.634662 3 120 0
0 0.000000 0.000000 0.000000 0
/autogroup-66
kworker/31:2 1646 10684.860325 110 120 0
0 0.000000 0.000000 0.000000 0 /
kworker/31:1H 1796 9096.988236 9 100 0
0 0.000000 0.000000 0.000000 0 /
Same after this patchset:
runnable tasks:
task PID tree-key switches prio wait-time
sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
watchdog/31 223 -11.998592 60 0 0.000000
0.944690 0.000000 0 /
migration/31 224 0.000000 161 0 0.000000
0.960574 0.000000 0 /
ksoftirqd/31 225 4907.154938 4 120 0.000000
0.005390 0.000000 0 /
kworker/31:0 226 31.071368 15 120 0.000000
0.089008 0.000000 0 /
kworker/31:0H 227 13566.695695 12 100 0.000000
0.080894 0.000000 0 /
kworker/31:1 467 13596.403449 316 120 0.000000
2.314132 0.000000 0 /
auditd 1513 0.256353 992 116 0.000000
20.936048 0.000000 0 /autogroup-46
kworker/31:1H 1804 13566.698706 10 100 0.000000
0.160330 0.000000 0 /
kworker/31:2H 14303 13589.006998 8 100 0.000000
0.085060 0.000000 0 /
Current /proc/sched_debug when CONFIG_SCHEDSTATS is set
runnable tasks:
task PID tree-key switches prio exec-runtime
sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
watchdog/159 805 -11.997308 68929 0 -11.997308
386.355640 0.001442 17 /
migration/159 806 0.000000 5 0 0.000000
0.541712 0.001364 17 /
ksoftirqd/159 807 -13.046724 3 120 -13.046724
0.003454 0.001356 17 /
kworker/159:0 808 -6.686082 42 120 -6.686082
2.364758 831990.032194 17 /
kworker/159:0H 809 -1.048310 4 100 -1.048310
0.024540 394.824356 17 /
kworker/159:1 6939 14.392296 836 120 14.392296
15.468298 273966793.171550 17 /
Same after this patchset:
runnable tasks:
task PID tree-key switches prio wait-time
sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
watchdog/31 223 -11.998730 29 0 0.016660
0.277190 0.001028 0 /
migration/31 224 0.000000 163 0 0.000530
1.089348 0.000994 0 /
ksoftirqd/31 225 -13.047768 3 120 0.014756
0.001952 0.001164 0 /
kworker/31:0 226 209.731324 17 120 0.755458
0.096596 17888.805854 0 /
kworker/31:0H 227 5556.434079 9 100 0.015650
0.083778 34507.103450 0 /
kworker/31:1 465 223.834529 21 120 0.012962
0.163522 17495.280072 0 /
kworker/31:2 712 10136.506903 158 120 5.358470
2.269444 81162.182416 0 /
kworker/31:1H 5904 10047.528224 6 100 0.028400
0.207288 20745.582406 0 /
Srikar Dronamraju (3):
sched:Properly format runnable tasks in /proc/sched_debug
sched:Replace vruntime with wait_sum in /proc/sched_debug
sched:Add sum_sleep_runtime to /proc/<pid>/sched
kernel/sched/debug.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
--
1.8.3.1
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