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2025-12-30 - 04:58
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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 10 highest latencies:
System rackbslot7.osadl.org (updated Tue Dec 30, 2025 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13953991356,44cyclictest13954-21latency_hist19:09:330
13953991073,32cyclictest9294-21latency_hist21:44:320
13953991053,28cyclictest16268-21grep21:55:070
13953991053,26cyclictest24260-21cat21:14:320
13953991052,28cyclictest21547-21ls23:00:070
139539910439,57cyclictest0-21swapper/023:20:060
13953991043,32cyclictest9037-21/usr/sbin/munin23:34:580
13953991042,28cyclictest3216-21fschecks_count00:19:510
139539910342,52cyclictest17944-21sh23:49:460
13953991032,30cyclictest346-21runrttasks21:14:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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