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2025-12-04 - 11:10
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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 Thu Dec 04, 2025 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
922504999436,39cyclictest1032102-21tune2fs22:20:145
922504997619,38cyclictest1090301-21timerandwakeup00:00:245
922504997437,18cyclictest691ktimers/520:10:075
922504997232,39cyclictest0-21swapper/519:21:515
922504997214,39cyclictest1024441-21ntpq22:05:225
922504997013,0cyclictest1087115-21ntpq23:55:205
922504996912,38cyclictest954726-21awk20:05:015
922504996810,39cyclictest951270-21users19:55:255
922504996628,38cyclictest0-21swapper/519:11:595
922504996021,39cyclictest982862-21sshd20:52:395
922504995921,19cyclictest691ktimers/520:44:475
922504995921,19cyclictest1036832-21/usr/sbin/munin22:30:015
922504995920,39cyclictest691ktimers/521:45:515
92250499591,39cyclictest973327-21collect220:35:225
92250499580,39cyclictest1060292-21cat23:10:155
922504995613,40cyclictest1021600-21ntpq22:00:185
922504995613,19cyclictest0-21swapper/520:20:195
92250499560,56cyclictest0-21swapper/521:54:175
92250499560,55cyclictest0-21swapper/521:35:055
92250499550,55cyclictest0-21swapper/523:38:415
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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