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2025-12-28 - 10:58
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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 Sun Dec 28, 2025 00:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
128007299780,59cyclictest1086-21runrttasks22:26:294
1280072997718,58cyclictest1406241-21ntpq22:50:224
1280072997636,19cyclictest1426593-21taskset23:26:374
1280072997536,18cyclictest6050ktimers/422:35:004
1280072997416,39cyclictest1303365-21awk19:50:154
1280072997333,19cyclictest6050ktimers/423:45:464
1280072997333,19cyclictest0-21swapper/420:45:104
1280072997312,19cyclictest0-21swapper/421:12:034
1280072997233,39cyclictest0-21swapper/419:13:054
1280072997232,19cyclictest0-21swapper/423:36:364
1280072997232,19cyclictest0-21swapper/422:07:444
1280072997132,0cyclictest0-21swapper/400:00:054
1280072997032,18cyclictest0-21swapper/419:43:444
1280072997031,39cyclictest0-21swapper/421:41:004
1280072997031,19cyclictest0-21swapper/420:52:214
1280072997031,19cyclictest0-21swapper/419:47:334
1280072997031,18cyclictest0-21swapper/400:27:534
1280072997031,0cyclictest0-21swapper/422:04:534
1280072997030,19cyclictest0-21swapper/420:01:294
1280072997011,19cyclictest0-21swapper/422:47:054
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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