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2026-06-19 - 14:28
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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 Fri Jun 19, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2430687997537,38cyclictest601ktimers/420:02:454
2430687997416,39cyclictest2549415-21/usr/sbin/munin22:45:174
2430687997315,39cyclictest2508644-21tail21:30:134
2430687997012,39cyclictest2528084-21diskstats22:05:134
2430687997012,39cyclictest2497301-21munin-run21:10:014
2430689996867,1cyclictest0-21swapper/600:10:166
243068799689,59cyclictest0-21swapper/420:54:314
243068799679,0cyclictest2473956-21ld20:25:194
243068799679,0cyclictest2473956-21ld20:25:194
2430687996527,38cyclictest0-21swapper/400:32:294
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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