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2026-05-24 - 08:53
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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 rack0slot2.osadl.org (updated Sun May 24, 2026 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2657195996057,2cyclictest3206822-21kworker/u16:3+events_unbound23:42:425
2657195995553,2cyclictest3253568-21kworker/u16:1+events_unbound23:47:535
2657191995250,2cyclictest3353890-21kworker/u16:1+events_unbound00:22:504
2657191995250,2cyclictest3024421-21kworker/u16:4+events_unbound22:27:554
2657200995147,3cyclictest124-21kswapd000:32:197
2657195995149,2cyclictest3253568-21kworker/u16:1+events_unbound23:37:515
2657191994947,2cyclictest3094646-21kworker/u16:0+events_unbound23:47:554
2657191994643,2cyclictest3149631-21kworker/u16:1+events_unbound22:57:414
265675624433,8sleep40-21swapper/419:05:124
2657195994341,2cyclictest3094646-21kworker/u16:0+events_unbound23:02:565
2657195994341,2cyclictest3046412-21kworker/u16:1+flush-8:022:37:545
2657195994240,2cyclictest3094646-21kworker/u16:0+events_unbound23:30:575
265668824232,7sleep50-21swapper/519:04:175
2657195994139,2cyclictest3302409-21kworker/u16:4+events_unbound00:01:185
2657195994139,2cyclictest3133441-21kworker/u16:5+events_unbound22:57:555
2657195994139,2cyclictest3024421-21kworker/u16:4+events_unbound22:32:415
2657191994139,2cyclictest2619044-21kworker/u16:1+flush-8:019:42:524
26477692415,30sleep70-21swapper/719:02:347
2657195994038,2cyclictest3121105-21kworker/u16:4+events_unbound22:52:405
2657191994038,2cyclictest3206822-21kworker/u16:3+events_unbound00:01:104
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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