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2026-04-29 - 16:01
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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 20 highest latencies:
System rackfslot7.osadl.org (updated Wed Apr 29, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1125020991380,137cyclictest0-21swapper/608:35:106
112501899846,59cyclictest1271569-21lpstat11:35:184
1125018997336,18cyclictest1186971-21ntp_states09:00:204
1125018997235,18cyclictest1173339-21/usr/sbin/munin08:35:204
1125018997233,39cyclictest0-21swapper/411:55:254
1125018997214,39cyclictest1292804-21munin-run12:15:014
1125018997149,21cyclictest1145115-21fw_packets07:45:134
1125018997032,19cyclictest1280271-21ntpq11:50:204
1125018997012,19cyclictest0-21swapper/407:20:214
1125018996810,39cyclictest1159406-21ntpq08:10:204
112502199670,67cyclictest0-21swapper/711:20:157
1125018996627,39cyclictest0-21swapper/411:29:284
1125018996626,39cyclictest0-21swapper/407:19:064
1125018996425,39cyclictest0-21swapper/409:45:384
1125018996424,39cyclictest0-21swapper/410:53:324
112501699630,61cyclictest0-21swapper/208:35:102
112501899613,39cyclictest1158044-21unin-run08:10:014
1125018996122,39cyclictest0-21swapper/408:44:114
112501999602,39cyclictest0-21swapper/507:50:145
1125018996022,19cyclictest1165010-21/usr/sbin/munin08:20:194
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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