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2026-08-12 - 22:09
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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 50 highest latencies:
System rackdslot4.osadl.org (updated Wed Aug 12, 2026 12:45:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591205171,23phc2sys0-21swapper/307:06:143
189582204171,22sleep20-21swapper/207:07:102
188752203169,22sleep10-21swapper/107:06:041
190122200167,22sleep00-21swapper/007:07:450
1409421690,4sleep125-21ksoftirqd/110:14:551
1385918263,10phc2sys0-21swapper/307:10:003
1385918263,10phc2sys0-21swapper/307:10:003
138491650,1ptp4l401ktimersoftd/312:36:273
76592610,4sleep21948199cyclictest07:50:142
150222590,2sleep20-21swapper/208:05:142
138491530,1ptp4l401ktimersoftd/308:43:383
19480994943,3cyclictest16654-21latency_hist09:15:001
19482994641,3cyclictest3904-21cron12:05:003
138491430,1ptp4l391rcuc/309:05:563
138491430,0ptp4l401ktimersoftd/312:10:033
19481994236,3cyclictest33-21ksoftirqd/211:00:012
19479994237,3cyclictest12752-21fschecks_count08:00:170
138491420,0ptp4l401ktimersoftd/308:21:453
19481994130,9cyclictest33-21ksoftirqd/210:10:232
1948199412,36cyclictest23556-21switchtime09:25:242
138491410,0ptp4l401ktimersoftd/311:18:233
19480994035,3cyclictest25-21ksoftirqd/108:20:001
19481993934,3cyclictest33-21ksoftirqd/211:25:012
19480993933,3cyclictest25-21ksoftirqd/108:10:011
138491390,0ptp4l401ktimersoftd/308:26:393
19481993834,3cyclictest33-21ksoftirqd/211:10:002
19481993833,3cyclictest33-21ksoftirqd/208:50:002
19481993832,4cyclictest33-21ksoftirqd/211:16:462
19481993832,3cyclictest33-21ksoftirqd/209:45:002
138491380,0ptp4l401ktimersoftd/309:36:473
19482993731,4cyclictest41-21ksoftirqd/310:31:423
19482993731,4cyclictest41-21ksoftirqd/309:47:173
19481993733,3cyclictest33-21ksoftirqd/209:00:012
19481993733,2cyclictest33-21ksoftirqd/212:30:002
19481993732,2cyclictest33-21ksoftirqd/207:40:002
19481993731,4cyclictest33-21ksoftirqd/212:30:432
19481993730,4cyclictest33-21ksoftirqd/210:31:492
19481993727,9cyclictest33-21ksoftirqd/210:35:242
19481993726,9cyclictest33-21ksoftirqd/209:55:192
19480993732,3cyclictest25-21ksoftirqd/108:40:001
19480993731,4cyclictest25-21ksoftirqd/112:09:161
19480993731,4cyclictest25-21ksoftirqd/110:01:581
19480993731,3cyclictest25-21ksoftirqd/107:35:001
138491370,0ptp4l401ktimersoftd/309:25:113
19482993631,3cyclictest41-21ksoftirqd/308:31:383
19482993630,4cyclictest41-21ksoftirqd/311:05:113
19482993630,4cyclictest41-21ksoftirqd/307:20:473
19481993631,3cyclictest33-21ksoftirqd/209:15:002
19481993631,2cyclictest33-21ksoftirqd/208:40:002
19481993630,4cyclictest33-21ksoftirqd/211:40:372
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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