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2026-03-21 - 18:50
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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 rackbslot7.osadl.org (updated Sat Mar 21, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23033991253,39cyclictest7781-21ssh09:20:450
230339912157,57cyclictest4040-21apt-key09:14:520
23033991174,51cyclictest6562-21latency_hist11:59:490
23033991174,51cyclictest6562-21latency_hist11:59:490
230339911641,19cyclictest26979-21latency_hist11:39:510
23033991153,53cyclictest21669-21cat12:24:490
23033991153,53cyclictest21669-21cat12:24:490
23033991134,48cyclictest27313-21ssh11:40:020
23033991134,48cyclictest27313-21ssh11:40:020
23033991133,49cyclictest0-21swapper/010:43:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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