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2026-06-20 - 01:04
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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 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
92692999209196,9cyclictest1012104-21dpkg11:30:461
92692899208201,5cyclictest69-21kswapd011:30:440
92692999124115,6cyclictest952580-21latency_hist08:30:011
92692999116104,9cyclictest1028461-21latency_hist12:25:001
92692899112102,6cyclictest971691-21latency_hist09:30:010
9269289910692,10cyclictest1213033-21systemd-journal07:45:000
9269299910192,7cyclictest1213033-21systemd-journal09:50:011
9269289910188,9cyclictest1017058-21latency_hist11:50:020
9269289910188,9cyclictest1017058-21latency_hist11:50:010
9269299910093,5cyclictest952558-21kworker/u8:0+events_unbound09:00:251
9269299910090,7cyclictest963728-21kworker/u8:3+flush-179:009:10:221
9269289910091,6cyclictest934777-21latency_hist07:35:000
9269289910090,7cyclictest1025266-21latency_hist12:15:010
926929999993,4cyclictest979574-21kworker/u8:0+flush-179:009:50:231
926928999989,6cyclictest1030047-21latency_hist12:30:000
926929999890,6cyclictest1010426-21latency_hist11:30:011
926929999791,4cyclictest931581-21kworker/u8:0+flush-179:007:50:011
926928999690,4cyclictest979574-21kworker/u8:0+events_unbound10:10:010
926929999586,7cyclictest936410-21latency_hist07:40:011
926929999586,6cyclictest1023683-21latency_hist12:10:011
926929999386,5cyclictest934812-21kworker/u8:2+flush-179:008:05:251
926929999382,8cyclictest991317-21latency_hist10:30:001
926929999284,6cyclictest997941-21apt-get10:50:111
926929999284,6cyclictest991573-21apt-get10:30:121
926929999283,7cyclictest971675-21kworker/u8:0+flush-179:009:40:201
926928999180,8cyclictest510-21rs:main0
926929998879,6cyclictest984981-21kworker/u8:3+flush-179:010:40:211
926929998780,4cyclictest1020467-21kworker/u8:2+flush-179:012:00:231
926929998678,5cyclictest952558-21kworker/u8:0+flush-179:008:30:251
926928998576,7cyclictest968771-21apt-get09:20:120
926928998574,8cyclictest1213033-21systemd-journal09:55:010
926929998476,6cyclictest945985-21kworker/u8:1+flush-179:008:20:231
926929998473,10cyclictest1011106-21kworker/u8:1+flush-179:011:55:001
926929998377,4cyclictest934812-21kworker/u8:2+flush-179:008:50:221
926929998276,5cyclictest975182-21kworker/u8:2+flush-179:010:20:191
926928998275,5cyclictest1033226-21latency_hist12:40:010
926928998272,7cyclictest947536-21latency_hist08:15:010
926929998172,7cyclictest997687-21latency_hist10:50:011
926929998171,8cyclictest1213033-21systemd-journal09:35:001
926928998074,4cyclictest930003-21latency_hist07:20:010
926928997970,7cyclictest991292-21kworker/u8:1+flush-179:010:35:000
926929997871,5cyclictest942732-21kworker/u8:0+flush-179:008:00:011
926929997773,2cyclictest1020546-21kworker/u8:3+flush-179:012:35:241
926928997737,19cyclictest1213033-21systemd-journal11:35:010
926928997667,7cyclictest510-21rs:main0
926928997462,9cyclictest973288-21apt-get09:35:000
926929997368,4cyclictest979574-21kworker/u8:0+events_unbound10:05:231
926929997368,4cyclictest942732-21kworker/u8:0+flush-179:008:00:261
926929997365,7cyclictest947551-21apt-get08:15:001
926928997370,2cyclictest991292-21kworker/u8:1+events_unbound10:35:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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