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2023-12-10 - 08:29
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6 (updated Sun Dec 10, 2023 00:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35632379910998,8cyclictest3642147-21latency_hist23:15:010
35632419910395,6cyclictest3582776-21kworker/u8:2+flush-179:020:30:011
35632419910394,6cyclictest3667728-21kworker/u8:0+flush-179:000:35:421
35632419910191,7cyclictest3582191-21kworker/u8:1+flush-179:020:40:301
3563241999991,5cyclictest3598632-21kworker/u8:0+flush-179:021:15:361
3563237999879,9cyclictest3634452-21apt-get22:50:210
3563237999680,12cyclictest3667691-21apt-get00:35:000
3563241999586,6cyclictest3622794-21latency_hist22:15:001
3563237999583,10cyclictest3623050-21apt-get22:15:190
3563241999483,9cyclictest2158010-21systemd-journal00:05:011
3563241999481,9cyclictest2158010-21systemd-journal22:30:021
3563241999481,9cyclictest2158010-21systemd-journal22:30:021
3563241999386,5cyclictest3595517-21kworker/u8:2+events_unbound20:50:331
3563237999382,8cyclictest3594137-21/usr/sbin/munin20:45:330
3563241999180,9cyclictest3624451-21kworker/u8:2+flush-179:022:55:321
3563241999180,9cyclictest3624451-21kworker/u8:2+flush-179:022:55:311
3563241999178,10cyclictest2158010-21systemd-journal21:00:011
3563241998978,9cyclictest3598632-21kworker/u8:0+flush-179:022:20:001
3563241998880,6cyclictest3667728-21kworker/u8:0+flush-179:000:35:021
3563241998878,6cyclictest3587568-21kworker/u8:3+flush-179:020:45:311
3563237998880,6cyclictest3616430-21latency_hist21:55:010
3563237998875,9cyclictest529-21rs:main0
3563241998776,9cyclictest3613149-21gpgv21:45:011
3563241998776,9cyclictest3613149-21gpgv21:45:001
3563237998777,8cyclictest3595739-21apt-get20:50:190
3563241998680,4cyclictest3632023-21kworker/u8:3+flush-179:022:49:561
3563237998676,8cyclictest3661560-21apt-get00:15:200
3563241998477,4cyclictest3573096-21kworker/u8:3+flush-179:020:05:321
3563241998377,4cyclictest3629408-21kworker/u8:1+flush-179:023:00:301
3563237998377,4cyclictest3603466-21kworker/u8:3+flush-179:021:20:310
3563237998377,4cyclictest3603466-21kworker/u8:3+flush-179:021:20:300
3563241998271,8cyclictest3646961-21kworker/u8:2+flush-179:023:40:001
3563237998171,7cyclictest3614843-21latency_hist21:50:000
3563241997971,6cyclictest3646961-21kworker/u8:2+flush-179:023:50:011
3563237997870,6cyclictest3595517-21kworker/u8:2+flush-179:021:30:350
3563237997870,6cyclictest3400221-21kworker/u8:3+flush-179:019:15:350
3563241997770,5cyclictest3634231-21kworker/u8:0+flush-179:022:55:001
3563241997769,6cyclictest3624451-21kworker/u8:2+flush-179:022:25:011
3563241997769,6cyclictest3585030-21kworker/u8:0+flush-179:020:15:321
3563241997670,4cyclictest3635826-21kworker/u8:4+flush-179:023:25:321
3563241997669,5cyclictest3598632-21kworker/u8:0+events_unbound21:30:001
3563241997669,5cyclictest3573096-21kworker/u8:3+events_unbound19:55:351
3563241997468,5cyclictest3656550-21kworker/u8:1+flush-179:000:14:561
3563241997468,5cyclictest3656550-21kworker/u8:1+flush-179:000:14:561
3563241997367,4cyclictest3598632-21kworker/u8:0+flush-179:021:55:301
3563241997366,5cyclictest3629408-21kworker/u8:1+flush-179:023:05:301
3563237997367,4cyclictest3582776-21kworker/u8:2+flush-179:020:25:310
3563241997263,7cyclictest3598632-21kworker/u8:0+flush-179:022:40:311
3563241997159,10cyclictest3626530-21diskstats22:25:281
3563241997159,10cyclictest3626530-21diskstats22:25:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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