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2026-07-05 - 20:26
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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 Sun Jul 05, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
235911199130123,5cyclictest2422005-21kworker/u8:2+events_unbound10:50:011
235910899123115,5cyclictest2452482-21latency_hist12:00:010
235911199115108,5cyclictest2433333-21kworker/u8:1+events_unbound11:15:011
235910899114107,4cyclictest2449289-21latency_hist11:50:010
235911199113107,4cyclictest2385001-21kworker/u8:1+events_unbound08:35:251
23591089911393,17cyclictest2462031-21latency_hist12:30:000
235910899113107,4cyclictest2370146-21kworker/u8:3+flush-179:007:55:240
235911199112105,4cyclictest2413198-21kworker/u8:0+events_unbound10:00:231
235911199112102,6cyclictest2404177-21kworker/u8:0+flush-179:009:40:261
235910899111101,7cyclictest1213033-21systemd-journal10:45:000
23591119911099,8cyclictest2393011-21kworker/u8:0+flush-179:009:05:211
23591119911097,10cyclictest2385305-21apt-get08:30:121
23591089911098,9cyclictest2372024-21latency_hist07:50:010
235910899110101,6cyclictest2441335-21latency_hist11:25:010
23591119910993,13cyclictest2385001-21kworker/u8:1+flush-179:008:50:191
235911199109102,5cyclictest2405812-21kworker/u8:1+flush-179:010:10:261
235911199109100,7cyclictest2370146-21kworker/u8:3+events_unbound07:50:171
235911199108102,4cyclictest2355939-21kworker/u8:3+flush-179:007:30:211
235911199108100,5cyclictest2439986-21kworker/u8:1+events_unbound11:20:151
235911199107100,5cyclictest2455285-21kworker/u8:0+events_unbound12:10:171
23591119910599,4cyclictest2355939-21kworker/u8:3+events_unbound07:15:191
23591119910595,7cyclictest2422005-21kworker/u8:2+events_unbound10:30:131
23591119910499,4cyclictest2399393-21kworker/u8:3+events_unbound09:20:231
23591119910492,8cyclictest2370146-21kworker/u8:3+events_unbound08:10:151
23591119910492,8cyclictest2370146-21kworker/u8:3+events_unbound08:10:141
23591119910389,11cyclictest2399393-21kworker/u8:3+flush-179:009:34:591
23591089910391,9cyclictest1213033-21systemd-journal12:10:000
23591119910295,4cyclictest2441319-21kworker/u8:2+flush-179:011:40:211
23591119910295,4cyclictest2441319-21kworker/u8:2+flush-179:011:40:201
23591119910293,6cyclictest2370146-21kworker/u8:3+flush-179:008:00:251
23591119910194,5cyclictest2365354-21kworker/u8:0+flush-179:008:15:231
23591119910192,6cyclictest2459898-21kworker/u8:1+flush-179:012:25:211
23591119910192,6cyclictest2441319-21kworker/u8:2+events_unbound11:45:151
23591089910192,6cyclictest2365354-21kworker/u8:0+flush-179:007:30:250
23591119910094,4cyclictest2449260-21kworker/u8:0+flush-179:011:55:241
23591119910094,4cyclictest2422005-21kworker/u8:2+flush-179:010:40:011
23591089910091,6cyclictest2401016-21latency_hist09:20:010
23591089910088,8cyclictest2397808-21kworker/u8:2+flush-179:009:15:000
2359111999990,5cyclictest2438172-21kworker/u8:3+events_unbound11:30:251
2359111999989,7cyclictest2413198-21kworker/u8:0+flush-179:009:55:261
2359111999987,7cyclictest2399393-21kworker/u8:3+flush-179:009:50:201
2359111999986,9cyclictest2459898-21kworker/u8:1+events_unbound12:30:211
2359108999989,7cyclictest2438172-21kworker/u8:3+flush-179:011:35:270
2359111999888,6cyclictest2366966-21kworker/u8:2+events_unbound07:35:241
2359111999884,6cyclictest2397808-21kworker/u8:2+events_unbound09:10:201
2359111999790,5cyclictest2399393-21kworker/u8:3+flush-179:009:45:151
2359111999789,6cyclictest2386694-21kworker/u8:3+events_unbound08:45:221
2359111999789,5cyclictest2452529-21kworker/u8:3+flush-179:012:00:211
2359108999786,7cyclictest2404177-21kworker/u8:0+flush-179:009:35:220
2359111999690,4cyclictest2399393-21kworker/u8:3+flush-179:009:25:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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