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2026-05-18 - 10:52
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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
Characteristics of the 20 highest latencies:
System rackdslot3.osadl.org (updated Mon May 18, 2026 00:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
116012206173,22sleep10-21swapper/119:05:391
139491205170,23phc2sys0-21swapper/319:05:093
116022203170,22sleep20-21swapper/219:05:402
117952202169,22sleep00-21swapper/019:08:040
139491163123,13phc2sys0-21swapper/319:10:023
290602750,1sleep20-21swapper/219:45:002
325942650,4sleep20-21swapper/221:00:132
12240996210,12cyclictest616-21gdbus21:20:253
12240996111,9cyclictest353-21mailstats22:05:243
1224099609,11cyclictest20352-21ls19:25:193
1224099608,16cyclictest23237-21cat21:45:283
1224099607,11cyclictest5350-21/usr/sbin/munin21:10:143
1224099598,10cyclictest7041-21cut20:05:203
1224099588,16cyclictest14567-21apt-get21:30:123
1224099579,9cyclictest15104-21sed22:35:243
1224099577,11cyclictest9154-21awk21:15:313
1224099577,11cyclictest28346-21grep23:05:173
1224099577,11cyclictest20841-21cat21:40:253
139391550,1ptp4l391rcuc/323:50:483
1224099557,17cyclictest23982-21/usr/sbin/munin00:05:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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