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2026-03-14 - 09:53
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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 rackdslot4.osadl.org (updated Sat Mar 14, 2026 00:45:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591208163,34phc2sys0-21swapper/319:06:513
297212203171,22sleep20-21swapper/219:07:422
296052203170,22sleep10-21swapper/119:06:121
295862200166,22sleep00-21swapper/019:06:040
3212721670,5sleep13019199cyclictest20:15:241
1704621660,6sleep03019099cyclictest19:45:230
3019299604,16cyclictest26237-21/usr/sbin/munin20:05:162
138491580,1ptp4l401ktimersoftd/320:56:473
3019299574,16cyclictest23577-21/usr/sbin/munin21:05:122
3019299573,16cyclictest19967-21unixbench_singl20:55:262
86462560,4sleep20-21swapper/223:50:152
3019299564,16cyclictest15123-21sh21:55:002
3019299562,16cyclictest0-21swapper/220:20:212
3019299543,16cyclictest6853-21ls22:40:202
3019299535,10cyclictest20918-21dpkg00:15:012
30190995346,4cyclictest27860-21sh20:10:000
138491530,1ptp4l401ktimersoftd/321:04:393
3019299523,16cyclictest0-21swapper/222:10:222
3019299515,15cyclictest2315-21gnome-shell20:13:582
169232510,2sleep30-21swapper/319:45:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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