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2026-08-14 - 04:24
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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 Aug 14, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
46383899156127,25cyclictest2029130-21cupsd00:00:021
46383899150138,8cyclictest555342-21latency_hist23:55:011
46383799137125,9cyclictest508908-21latency_hist21:30:010
46383899131116,11cyclictest1213033-21systemd-journal22:50:001
46383799126119,5cyclictest471215-21kworker/u8:0+flush-179:020:10:240
46383899123108,11cyclictest1213033-21systemd-journal20:40:001
46383799123114,5cyclictest526412-21kworker/u8:0+events_unbound22:25:230
46383899121109,8cyclictest526465-21kworker/u8:3+flush-179:022:25:251
46383899121103,5cyclictest492701-21kworker/u8:0+flush-179:020:40:211
46383899120109,8cyclictest486409-21kworker/u8:3+flush-179:020:25:211
46383799118112,4cyclictest518517-21kworker/u8:1+flush-179:022:15:230
46383799118110,6cyclictest542588-21kworker/u8:2+flush-179:000:35:000
46383899117106,8cyclictest471215-21kworker/u8:0+flush-179:020:10:221
46383899115104,8cyclictest478435-21kworker/u8:2+flush-179:019:55:211
46383799115102,10cyclictest1213033-21systemd-journal00:00:010
46383799113106,5cyclictest526412-21kworker/u8:0+flush-179:022:25:010
46383899112104,6cyclictest504361-21kworker/u8:1+flush-179:021:30:181
4638379911284,20cyclictest471749-21kworker/u8:2+flush-179:019:40:210
46383899111101,7cyclictest489586-21kworker/u8:2+flush-179:021:05:241
46383899110101,6cyclictest515277-21latency_hist21:50:011
46383799110103,5cyclictest507310-21kworker/u8:0+flush-179:021:40:170
46383799108101,5cyclictest460473-21kworker/u8:3+flush-179:019:20:220
4638379910799,5cyclictest542588-21kworker/u8:2+flush-179:000:00:170
4638389910595,7cyclictest539429-21latency_hist23:05:021
4638389910595,7cyclictest529582-21kworker/u8:2+flush-179:022:50:231
4638379910598,4cyclictest537541-21kworker/u8:1+events_unbound00:10:000
4638389910495,5cyclictest542588-21kworker/u8:2+flush-179:000:15:011
4638389910489,12cyclictest483206-21kworker/u8:1+flush-179:020:15:181
4638379910497,5cyclictest537541-21kworker/u8:1+flush-179:023:45:170
4638379910396,5cyclictest483206-21kworker/u8:1+flush-179:020:35:220
4638379910295,5cyclictest564969-21latency_hist00:25:000
4638379910295,5cyclictest564969-21latency_hist00:25:000
4638379910194,5cyclictest494357-21kworker/u8:1+flush-179:020:50:250
463837999992,5cyclictest561770-21latency_hist00:15:010
463837999991,5cyclictest494357-21kworker/u8:1+flush-179:020:45:230
463837999988,9cyclictest537573-21latency_hist23:00:010
463838999890,5cyclictest471215-21kworker/u8:0+flush-179:019:50:241
463838999887,8cyclictest489586-21kworker/u8:2+flush-179:021:15:221
463838999684,9cyclictest474956-21latency_hist19:45:011
463837999690,4cyclictest539411-21kworker/u8:0+flush-179:023:05:210
463837999682,11cyclictest1213033-21systemd-journal21:20:010
463838999586,6cyclictest542588-21kworker/u8:2+flush-179:000:30:221
463838999489,4cyclictest494357-21kworker/u8:1+flush-179:020:45:261
463837999488,4cyclictest515313-21kworker/u8:3+flush-179:022:10:190
463837999487,5cyclictest537541-21kworker/u8:1+flush-179:023:40:270
463837999487,5cyclictest515313-21kworker/u8:3+flush-179:021:55:180
463837999487,5cyclictest471215-21kworker/u8:0+flush-179:019:55:010
463837999486,5cyclictest537583-21apt-get23:00:020
463838999385,6cyclictest518517-21kworker/u8:1+flush-179:022:05:231
463837999385,5cyclictest542588-21kworker/u8:2+flush-179:023:35:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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