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2026-04-20 - 14:01
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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 rack3slot6.osadl.org (updated Mon Apr 20, 2026 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23756211035,59sleep10-21swapper/107:06:161
1196621030,7sleep0171rcuc/009:35:240
61222850,5chrt6124-21timerandwakeup07:45:351
24285998211,64cyclictest503-21snmpd07:50:120
232232818,56sleep023258-21/usr/sbin/munin07:05:250
24290997945,15cyclictest13463-21telnet09:40:151
24285997962,12cyclictest14-21ksoftirqd/011:45:260
24285997853,14cyclictest0-21swapper/007:25:150
24285997519,51cyclictest0-21swapper/010:15:130
24285997457,9cyclictest14-21ksoftirqd/009:50:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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