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2025-10-31 - 04:16
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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 31, 2025 00:46:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2333699250,0cyclictest0-21swapper/123:35:131
2333699230,5cyclictest0-21swapper/122:10:201
2333099231,18cyclictest29673-21cat23:10:010
2333099230,22cyclictest0-21swapper/021:39:450
2333699224,3cyclictest0-21swapper/120:37:301
2333699220,6cyclictest0-21swapper/119:28:261
2333699220,18cyclictest0-21swapper/120:27:461
23330992113,4cyclictest0-21swapper/023:19:240
23336992017,2cyclictest998-21gmain20:10:341
2333699201,18cyclictest414-20systemd-journal21:30:001
2333699200,2cyclictest12948-21apache_accesses20:45:131
2333699200,0cyclictest0-21swapper/121:00:241
2334099192,16cyclictest18219-21cpuspeed_turbos23:45:142
2334099192,16cyclictest14536-21mailstats20:45:222
23340991917,1cyclictest0-21swapper/220:25:542
2334099191,17cyclictest0-21swapper/222:40:182
2334099190,2cyclictest8619-21apt-key21:35:012
2334099190,2cyclictest4532-21H212:26:332
2334099190,2cyclictest4528-21H212:26:332
2334099190,18cyclictest0-21swapper/200:15:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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