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2026-06-19 - 13:04
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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 Fri Jun 19, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
375957999155132,21cyclictest510-21rs:main1
375957999153144,6cyclictest3851804-21kworker/u8:1+events_unbound00:00:181
375957999139129,7cyclictest3785222-21latency_hist20:30:011
375957799128121,4cyclictest3829009-21kworker/u8:3+flush-179:023:20:000
375957999116103,11cyclictest3851804-21kworker/u8:1+flush-179:000:15:161
375957999112103,7cyclictest3767443-21kworker/u8:0+flush-179:019:40:001
375957999111102,6cyclictest3765866-21latency_hist19:30:001
375957999109103,4cyclictest3829009-21kworker/u8:3+flush-179:022:45:231
37595779910796,7cyclictest3854378-21kworker/u8:0+flush-179:000:00:310
37595799910695,8cyclictest3856597-21latency_hist00:10:001
37595779910698,6cyclictest3819153-21latency_hist22:15:010
37595779910694,9cyclictest1213033-21systemd-journal20:25:020
37595799910383,18cyclictest3796330-21kworker/u8:1+flush-179:021:35:211
37595799910383,18cyclictest3796330-21kworker/u8:1+flush-179:021:35:211
37595799910195,3cyclictest3847051-21kworker/u8:2+flush-179:023:45:161
37595799910092,6cyclictest3823921-21kworker/u8:0+flush-179:022:30:221
37595799910092,6cyclictest3802769-21kworker/u8:0+events_unbound21:35:011
3759579999992,5cyclictest3772218-21kworker/u8:2+flush-179:019:55:201
3759579999890,5cyclictest3851804-21kworker/u8:1+flush-179:000:30:221
3759579999791,4cyclictest3767443-21kworker/u8:0+flush-179:019:40:231
3759577999668,16cyclictest3851804-21kworker/u8:1+flush-179:000:10:230
3759579999388,4cyclictest3840346-21kworker/u8:1+events_unbound23:35:251
3759579999288,3cyclictest3773848-21kworker/u8:0+events_unbound20:05:241
3759579999288,3cyclictest3773848-21kworker/u8:0+events_unbound20:05:241
3759579999283,7cyclictest3822219-21kworker/u8:2+flush-179:023:10:011
3759577999279,9cyclictest3847051-21kworker/u8:2+flush-179:023:40:160
3759579999185,4cyclictest3788997-21kworker/u8:2+events_unbound20:50:241
3759579999185,4cyclictest3788997-21kworker/u8:2+events_unbound20:50:241
3759579999184,5cyclictest3767443-21kworker/u8:0+flush-179:019:45:201
3759579999179,10cyclictest1213033-21systemd-journal21:50:001
3759577999181,7cyclictest3845394-21latency_hist23:35:010
3759579998983,4cyclictest3823921-21kworker/u8:0+flush-179:022:30:001
3759579998982,5cyclictest3829009-21kworker/u8:3+flush-179:023:30:251
3759579998982,5cyclictest3805892-21kworker/u8:3+events_unbound21:40:191
3759579998981,6cyclictest3788997-21kworker/u8:2+events_unbound21:00:001
3759579998980,6cyclictest3810992-21kworker/u8:0+flush-179:022:05:011
3759579998980,6cyclictest3810992-21kworker/u8:0+flush-179:022:05:011
3759579998882,4cyclictest3817548-21kworker/u8:1+flush-179:022:20:001
3759579998880,5cyclictest3822219-21kworker/u8:2+flush-179:023:10:211
3759579998880,5cyclictest3822219-21kworker/u8:2+flush-179:023:10:201
3759579998879,7cyclictest3821017-21apt-get22:20:121
3759579998779,5cyclictest3796330-21kworker/u8:1+flush-179:021:20:201
3759577998778,6cyclictest3862964-21latency_hist00:30:010
3759579998678,5cyclictest3773848-21kworker/u8:0+events_unbound20:35:141
3759579998676,7cyclictest3833736-21latency_hist23:00:011
3759579998676,7cyclictest3756266-21kworker/u8:2+flush-179:019:15:201
3759577998670,11cyclictest3797995-21kworker/u8:2+events_unbound21:30:000
3759577998578,5cyclictest3854378-21kworker/u8:0+flush-179:000:05:220
3759577998576,6cyclictest3846998-21latency_hist23:40:010
3759579998478,4cyclictest3840346-21kworker/u8:1+flush-179:023:19:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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