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2026-05-13 - 13:30
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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 Wed May 13, 2026 00:45:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491206172,22phc2sys0-21swapper/319:07:093
139491206172,22phc2sys0-21swapper/319:07:093
26992202169,22sleep20-21swapper/219:05:532
26992202169,22sleep20-21swapper/219:05:532
27312200168,21sleep10-21swapper/119:06:151
27312200168,21sleep10-21swapper/119:06:151
28822198165,22sleep00-21swapper/019:08:080
28822198165,22sleep00-21swapper/019:08:080
860721450,5sleep0346899cyclictest19:20:140
1394918161,10phc2sys0-21swapper/319:10:013
347299599,16cyclictest19642-21taskset21:57:303
347299579,16cyclictest5914-21/usr/sbin/munin19:15:223
347299579,15cyclictest28453-21ls20:00:213
347299568,17cyclictest13909-21/usr/sbin/munin22:55:263
117042550,2sleep10-21swapper/119:25:211
347299499,17cyclictest28275-21/usr/sbin/munin21:10:243
296632490,2sleep10-21swapper/120:05:011
347299488,17cyclictest0-21swapper/300:16:393
347299480,14cyclictest8240-21apt-get21:35:113
347299478,10cyclictest18665-21/usr/sbin/munin23:05:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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