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2025-03-21 - 07:43
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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 Fri Mar 21, 2025 00:43:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16641026655,7sleep40-21swapper/403:39:294
16617725747,7sleep60-21swapper/603:36:106
16643925646,7sleep50-21swapper/503:39:545
16642225319,30sleep70-21swapper/703:39:407
166742993533,2cyclictest441605-21kworker/u16:3+flush-8:006:14:596
166737993432,2cyclictest666566-21kworker/u16:2+events_unbound08:43:075
166742993230,2cyclictest88903-21kworker/u16:2+flush-8:003:59:596
166737993230,2cyclictest622522-21kworker/u16:4+events_unbound08:18:065
166737993129,2cyclictest547326-21kworker/u16:0+events_unbound08:02:075
166737993128,2cyclictest552021-21kworker/u16:3+events_unbound07:36:275
16674799300,28cyclictest548215-21latency_hist07:09:597
166737993028,2cyclictest701521-21kworker/u16:0+events_unbound09:06:115
166737993028,2cyclictest655758-21kworker/u16:1+events_unbound08:23:195
166737993027,2cyclictest368222-21kworker/u16:0+events_unbound06:36:075
166733993028,2cyclictest165499-21kworker/u16:3+events_unbound05:25:014
166737992927,2cyclictest655758-21kworker/u16:1+events_unbound09:04:105
166737992927,2cyclictest560363-21kworker/u16:2+events_unbound07:44:065
166737992927,2cyclictest280417-21kworker/u16:4+events_unbound04:46:105
166737992927,2cyclictest165499-21kworker/u16:3+events_unbound05:36:065
166737992927,2cyclictest165499-21kworker/u16:3+events_unbound04:37:595
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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