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2026-04-26 - 20:31
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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 10 highest latencies:
System rackfslot7.osadl.org (updated Sun Apr 26, 2026 12:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1699269999537,39cyclictest1737629-21latency_hist08:20:001
1699269997513,40cyclictest1834234-21aten2.4-expect11:15:131
1699268997533,23cyclictest0-21swapper/010:55:160
1699269997435,38cyclictest236199-21snmpd10:08:491
1699269997112,58cyclictest0-21swapper/107:35:111
1699268997133,38cyclictest0-21swapper/009:25:150
1699269996911,58cyclictest1758839-21kworker/u32:2+rpciod09:16:091
1699269996020,39cyclictest331ktimers/109:48:261
169927599590,59cyclictest0-21swapper/708:20:177
169926999590,40cyclictest1793983-21lpstat10:00:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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