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2026-08-14 - 10:27
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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 Fri Aug 14, 2026 00:45:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491230164,22phc2sys0-21swapper/319:07:323
178432206173,22sleep10-21swapper/119:09:411
177822203170,22sleep20-21swapper/219:08:542
157282201168,22sleep00-21swapper/019:05:020
1590221330,6sleep11816199cyclictest20:10:221
139391680,1ptp4l391rcuc/320:40:233
1816199670,65cyclictest0-21swapper/121:36:521
1816099641,29cyclictest616-21gdbus20:15:240
1816099601,19cyclictest21560-21unixbench_multi22:35:280
1816099560,21cyclictest8470-21mailstats21:00:250
139391550,0ptp4l391rcuc/323:09:513
1816399540,15cyclictest1300-21snmpd21:50:163
1816299544,48cyclictest18959-21kworker/2:122:25:342
1816099530,18cyclictest28367-21latency_hist00:00:000
139391530,1ptp4l391rcuc/323:10:043
1816099510,23cyclictest29402-21ssh19:30:250
134491510,7getstats1816399cyclictest22:07:203
1816399487,6cyclictest12365-21/usr/sbin/munin20:05:163
1816399460,17cyclictest22463-21cat23:45:203
57898440,14rtkit-daemon1453-21gpm21:10:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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