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2025-10-24 - 10:55
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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 rackdslot0.osadl.org (updated Fri Oct 24, 2025 00:45:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2961899242,15cyclictest0-21swapper/219:50:232
2961899240,5cyclictest0-21swapper/200:21:272
2961899234,1cyclictest0-21swapper/200:00:532
2961899231,3cyclictest0-21swapper/220:55:202
2961899230,15cyclictest29297-21latency_hist23:55:012
2961899225,13cyclictest0-21swapper/200:39:322
29618992215,6cyclictest29455-21/usr/sbin/munin23:55:172
29618992214,7cyclictest17510-21grep20:40:242
29618992213,5cyclictest0-21swapper/219:40:182
2961899220,2cyclictest967-21thermald23:20:222
2961899220,21cyclictest28313-21expr20:05:162
2961899220,16cyclictest19975-21cstates22:40:152
2960899222,17cyclictest0-21swapper/021:34:340
29618992116,4cyclictest0-21swapper/200:33:052
2961899211,1cyclictest8505-21processes23:15:212
2961899210,2cyclictest31855-21taskset21:06:132
2961899210,2cyclictest25919-21apache_volume21:55:142
2961899210,2cyclictest17444-21grep22:35:152
2961899210,20cyclictest31445-21pzem_current19:10:242
2961899210,20cyclictest2658-21systemctl23:05:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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