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2025-11-16 - 06:40
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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 Nov 16, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1736069910093,4cyclictest173523-21kworker/u8:3+flush-179:019:20:001
173606999685,8cyclictest273311-21latency_hist00:15:001
173604999683,10cyclictest183053-21apt-get19:40:000
173606999588,4cyclictest173523-21kworker/u8:3+events_unbound19:15:011
173606998780,5cyclictest224480-21kworker/u8:1+flush-179:022:30:011
173606998175,5cyclictest240152-21kworker/u8:0+events_unbound22:40:011
173606998069,8cyclictest223947-21latency_hist21:45:011
173604998073,5cyclictest207747-21kworker/u8:2+events_unbound21:00:240
173606997973,4cyclictest240152-21kworker/u8:0+events_unbound23:00:261
173604997972,5cyclictest207747-21kworker/u8:2+flush-179:021:15:010
173604997870,6cyclictest246488-21apt-get22:55:030
173606997770,5cyclictest198251-21kworker/u8:3+flush-179:021:10:011
173604997769,6cyclictest271-21systemd-journal20:29:590
173604997665,9cyclictest275178-21apt-get00:20:130
173606997569,4cyclictest219141-21kworker/u8:0+flush-179:021:40:001
173606997568,5cyclictest272391-21kworker/u8:2+flush-179:000:20:001
173604997567,6cyclictest258667-21latency_hist23:30:010
173606997467,5cyclictest228685-21kworker/u8:2+flush-179:022:00:001
173606997368,4cyclictest198251-21kworker/u8:3+flush-179:020:45:011
173606997368,4cyclictest160810-21kworker/u8:1+flush-179:019:55:271
173604997362,8cyclictest250197-21latency_hist23:05:020
173606997267,4cyclictest198194-21kworker/u8:1+flush-179:020:25:001
173606997266,4cyclictest227097-21kworker/u8:0+events_unbound22:10:001
173606997265,6cyclictest220732-21kworker/u8:2+flush-179:021:45:221
173606997165,4cyclictest189953-21kworker/u8:2+flush-179:020:35:011
173606997164,5cyclictest224480-21kworker/u8:1+flush-179:022:10:161
173606997162,6cyclictest260297-21kworker/u8:3+flush-179:023:45:211
173606997161,7cyclictest202975-21latency_hist20:40:001
173606997156,11cyclictest188144-21apt-get19:55:011
173604997165,4cyclictest201424-21kworker/u8:0+flush-179:021:10:000
173604997057,5cyclictest264244-21kworker/u8:1+events_unbound00:00:000
173606996963,4cyclictest227097-21kworker/u8:0+flush-179:022:05:011
173606996862,4cyclictest173523-21kworker/u8:3+flush-179:019:40:001
173606996858,8cyclictest195018-21latency_hist20:15:011
173604996861,4cyclictest227097-21kworker/u8:0+flush-179:021:55:220
173604996857,8cyclictest186546-21latency_hist19:50:000
173606996659,5cyclictest252024-21kworker/u8:1+events_unbound23:10:001
173606996558,5cyclictest240152-21kworker/u8:0+flush-179:023:20:011
173606996558,5cyclictest214156-21kworker/u8:1+flush-179:021:25:211
173604996554,8cyclictest271-21systemd-journal22:15:000
173606996459,4cyclictest160810-21kworker/u8:1+events_unbound19:45:171
173606996458,5cyclictest268540-21kworker/u8:3+flush-179:000:35:001
173604996459,4cyclictest220732-21kworker/u8:2+flush-179:021:40:010
173604996459,3cyclictest214156-21kworker/u8:1+flush-179:021:15:230
173606996358,4cyclictest198251-21kworker/u8:3+flush-179:020:59:541
173606996357,3cyclictest201424-21kworker/u8:0+events_unbound21:10:171
173604996355,6cyclictest189953-21kworker/u8:2+flush-179:020:20:250
173604996354,6cyclictest253642-21apt-get23:15:000
173604996353,8cyclictest188644-21apt-get19:55:150
173604996253,6cyclictest235084-21latency_hist22:20:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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