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2026-09-18 - 02:49
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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 20 highest latencies:
System rackeslot3.osadl.org (updated Thu Sep 17, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3427503996935,32cyclictest3453099-21kworker/1:108:35:151
3427503996737,29cyclictest3437376-21kworker/1:207:50:111
3427503996535,28cyclictest3431613-1kworker/1:0H07:40:121
3427503996534,29cyclictest3570528-21kworker/1:011:05:161
342750399650,63cyclictest0-21swapper/107:32:451
3427503996462,1cyclictest0-21swapper/110:31:311
3427503996424,38cyclictest3546533-21kworker/1:110:50:151
342750399640,63cyclictest0-21swapper/108:11:391
3427503996333,29cyclictest3512376-21kworker/1:010:05:141
3427503996333,28cyclictest3464412-21kworker/1:009:05:141
342750399625,54cyclictest954417-21systemd-journal11:55:011
3427503996242,18cyclictest3437376-21kworker/1:207:45:131
3427503996239,21cyclictest3453099-21kworker/1:108:45:141
3427503996233,28cyclictest3620910-21kworker/1:112:05:151
342750399620,61cyclictest0-21swapper/109:23:091
342750399620,1cyclictest3465728-21diskmemload11:39:381
342750399620,1cyclictest0-21swapper/110:19:551
342750399620,1cyclictest0-21swapper/108:18:391
3427503996142,17cyclictest3431613-1kworker/1:0H10:10:151
3427503996140,20cyclictest3431613-1kworker/1:0H09:25:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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