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2026-09-15 - 04:23
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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.osadl.org (updated Tue Sep 15, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
348965299149136,10cyclictest1213033-21systemd-journal00:00:000
3489652991391,134cyclictest1-21systemd00:04:000
348965299135129,4cyclictest3555926-21kworker/u8:1+events_unbound22:35:000
348965399133122,8cyclictest3585178-21latency_hist00:05:011
348965399131117,10cyclictest1213033-21systemd-journal21:05:001
348965399130120,7cyclictest1213033-21systemd-journal20:55:001
348965299126117,7cyclictest3596716-21gpgv00:40:010
348965299125115,7cyclictest3594984-21latency_hist00:35:010
348965299121117,2cyclictest1-21systemd23:00:000
348965299121114,5cyclictest3578992-21kworker/u8:3+flush-179:000:15:160
348965399118104,9cyclictest3562437-21gpgv22:55:001
348965299118110,5cyclictest3508949-21kworker/u8:0+flush-179:020:45:190
348965299117108,5cyclictest3515106-21kworker/u8:4+flush-179:020:35:210
348965299117105,9cyclictest3528595-21apt-get21:08:560
348965299115108,5cyclictest3571465-21kworker/u8:1+flush-179:023:40:210
348965299115106,6cyclictest3495436-21kworker/u8:2+events_unbound19:35:000
348965299113107,5cyclictest3581901-21kworker/u8:1+flush-179:000:10:010
348965399112100,9cyclictest2335894-21kworker/u8:0+flush-179:019:15:001
348965299112103,7cyclictest3559179-21kworker/u8:0+events_unbound23:30:010
348965299112101,9cyclictest3591671-21gpgv00:25:010
34896539911086,21cyclictest3551188-21latency_hist22:20:011
348965399110100,7cyclictest3543249-21kworker/u8:2+events_unbound22:10:251
348965299109102,5cyclictest3578992-21kworker/u8:3+flush-179:000:25:010
348965299108101,5cyclictest3557523-21kworker/u8:2+events_unbound22:40:230
34896529910799,7cyclictest3543249-21kworker/u8:2+flush-179:022:00:000
34896539910693,9cyclictest3492762-21kworker/u8:1+flush-179:020:20:001
34896529910699,5cyclictest3559179-21kworker/u8:0+flush-179:022:45:210
348965299106100,4cyclictest3559179-21kworker/u8:0+flush-179:023:35:220
34896529910598,5cyclictest3508949-21kworker/u8:0+flush-179:020:25:210
34896529910586,5cyclictest3520421-21kworker/u8:2+events_unbound21:00:010
34896539910492,8cyclictest3508949-21kworker/u8:0+flush-179:020:45:161
34896539910489,11cyclictest1213033-21systemd-journal23:20:001
34896529910498,4cyclictest3543249-21kworker/u8:2+flush-179:022:25:230
34896529910497,5cyclictest3580340-21latency_hist23:50:010
34896529910494,7cyclictest3555926-21kworker/u8:1+flush-179:022:35:210
34896539910397,4cyclictest3593654-21apt-get00:30:131
34896539910394,6cyclictest3589925-21kworker/u8:0+events_unbound00:25:191
34896529910399,3cyclictest3492762-21kworker/u8:1+flush-179:020:05:240
34896529910397,5cyclictest3562806-21kworker/u8:2+flush-179:023:00:240
34896529910396,5cyclictest3536830-21kworker/u8:0+flush-179:022:00:240
34896529910390,4cyclictest2335894-21kworker/u8:0+flush-179:019:25:210
34896529910297,3cyclictest3559179-21kworker/u8:0+events_unbound23:10:000
34896529910291,5cyclictest3536830-21kworker/u8:0+events_unbound21:45:220
34896529910191,7cyclictest3532046-21kworker/u8:3+flush-179:021:30:180
34896529910094,4cyclictest3536830-21kworker/u8:0+flush-179:022:05:240
34896529910094,4cyclictest3536830-21kworker/u8:0+flush-179:022:05:240
34896529910091,6cyclictest3496025-21kworker/u8:3+events_unbound19:40:260
3489652999992,5cyclictest3511866-21kworker/u8:3+events_unbound20:20:220
3489652999991,5cyclictest2335894-21kworker/u8:0+flush-179:019:20:210
3489652999991,5cyclictest2335894-21kworker/u8:0+flush-179:019:20:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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