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2026-07-08 - 13:09
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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 rackfslot7.osadl.org (updated Wed Jul 08, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
203988999111110,0cyclictest2196223-21sed23:55:012
20398899910769,19cyclictest2205968-21ntpq00:10:192
2039889999355,38cyclictest874-21mta-sts-daemon19:52:432
2039889998426,39cyclictest2127840-21aten2.4_rfpower21:50:122
2039889997856,19cyclictest421ktimers/219:55:182
2039889997636,39cyclictest2216928-21ldconfig00:30:202
2039889997556,19cyclictest411rcuc/220:55:312
2039889997537,20cyclictest2203964-21vmstat00:05:242
2039889997537,19cyclictest2144010-21munin-run22:19:592
2039890997474,0cyclictest776-21dbus-daemon00:00:003
2039889997416,58cyclictest2147648-21expr22:25:132
2039889997235,18cyclictest421ktimers/220:02:402
2039889997214,39cyclictest2117168-21awk21:30:132
2039888997253,19cyclictest331ktimers/123:35:161
2039889997031,39cyclictest2170214-21ntpq23:05:202
2039889997031,39cyclictest2097779-21kworker/u32:0+flush-8:000:15:522
2039889996911,39cyclictest2188103-21sed23:40:012
2039889996829,19cyclictest0-21swapper/219:13:242
2039889996829,19cyclictest0-21swapper/219:13:242
2039889996728,39cyclictest0-21swapper/221:07:402
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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