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2025-12-06 - 16:21
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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 Sat Dec 06, 2025 12:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1971299997335,19cyclictest1088-21runrttasks07:47:190
1971299997216,37cyclictest1994384-21/usr/sbin/munin07:50:240
1971299997216,37cyclictest1994384-21/usr/sbin/munin07:50:230
1971299997213,39cyclictest0-21swapper/008:56:270
1971299997113,40cyclictest0-21swapper/011:55:240
1971299997113,39cyclictest0-21swapper/009:36:230
1971299996930,39cyclictest0-21swapper/008:35:030
197130199688,40cyclictest1989636-21taskset07:40:162
197130399679,39cyclictest61-21ksoftirqd/409:40:174
1971299996727,39cyclictest0-21swapper/008:07:390
1971299996727,39cyclictest0-21swapper/008:07:390
1971301996222,39cyclictest0-21swapper/208:30:182
1971299996042,18cyclictest85250irq/35-eno1-TxRx-112:14:460
1971299995719,0cyclictest101850irq/40-eno2-TxRx-108:50:570
1971299995718,38cyclictest85250irq/35-eno1-TxRx-111:50:100
1971299995717,38cyclictest1974194-21sh07:15:010
1971303995618,19cyclictest0-21swapper/410:55:204
1971299995618,38cyclictest0-21swapper/007:17:330
1971299995618,0cyclictest101850irq/40-eno2-TxRx-111:48:520
1971299995617,39cyclictest2077685-21ntpq10:15:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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