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2026-05-10 - 09:33
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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 rackcslot4.osadl.org (updated Sun May 10, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26240042276184,78sleep00-21swapper/019:09:330
26236412265205,46sleep10-21swapper/119:05:391
27402352700,5sleep00-21swapper/022:40:130
2624169995516,9cyclictest2706370-21latency_hist21:55:011
26857322540,4sleep1251rcuc/121:27:021
2624169995419,12cyclictest2699945-21cut21:45:201
179699540,3rtkit-daemon1795-21rtkit-daemon23:55:420
2624169995317,13cyclictest2817904-21apt-get00:25:151
2624169995317,10cyclictest2672020-21diskmemload23:00:231
2624169995316,12cyclictest2801282-21ntpq00:00:211
2624169995315,12cyclictest2683441-21sed21:25:011
2624169995315,11cyclictest2813869-21latency_hist00:20:011
2624169995216,14cyclictest2672979-21ls21:10:211
2624169995216,10cyclictest1-21systemd22:32:591
2624169995214,17cyclictest2639324-21grep19:45:211
2624169995214,11cyclictest26260942chrt19:15:011
179699520,3rtkit-daemon1795-21rtkit-daemon00:38:241
2624169995119,16cyclictest2744789-21/usr/sbin/munin22:45:241
2624169995118,11cyclictest2643251-21sh19:55:211
2624169995117,11cyclictest2672020-21diskmemload22:40:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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