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2026-05-15 - 08:56
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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 rackdslot1.osadl.org (updated Fri May 15, 2026 00:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26248997410,62cyclictest29576-21kworker/1:200:31:491
26249997337,4cyclictest33-21ksoftirqd/200:00:002
101302690,4sleep110134-21timerandwakeup20:50:261
26249996834,4cyclictest33-21ksoftirqd/200:40:012
26249996828,7cyclictest33-21ksoftirqd/223:19:442
26249996733,7cyclictest33-21ksoftirqd/222:16:192
26249996729,4cyclictest33-21ksoftirqd/200:25:142
2624899670,24cyclictest2844-21hddtemp_smartct00:05:201
2624899670,22cyclictest5635-21cut00:10:191
134491670,3ptp4l9850-21ntp_states23:10:263
26249996626,6cyclictest33-21ksoftirqd/223:05:002
2624899660,27cyclictest10241-21awk22:00:281
2624899660,26cyclictest32079-21cat00:00:001
149412660,6sleep02624799cyclictest19:55:130
26249996530,4cyclictest33-21ksoftirqd/219:36:262
26249996530,4cyclictest33-21ksoftirqd/219:36:262
2624899652,26cyclictest0-21swapper/100:37:121
2624899650,24cyclictest14608-21ls21:00:261
26249996434,3cyclictest33-21ksoftirqd/220:05:002
26249996430,4cyclictest33-21ksoftirqd/223:43:282
26249996425,4cyclictest33-21ksoftirqd/220:30:002
2624899641,60cyclictest8041-21irqstats00:15:191
26249996333,4cyclictest33-21ksoftirqd/200:00:352
26249996333,3cyclictest33-21ksoftirqd/223:40:002
2624899632,19cyclictest0-21swapper/119:35:271
2624899632,19cyclictest0-21swapper/119:35:271
2624899630,30cyclictest31412-21seq21:39:371
2624899630,24cyclictest21490-21switchtime22:25:231
26249996233,4cyclictest33-21ksoftirqd/219:44:522
26249996230,5cyclictest33-21ksoftirqd/200:15:162
2624899621,22cyclictest12779-21expr00:25:221
134491620,3ptp4l28177-21ntp_states22:40:233
134491620,3ptp4l28177-21ntp_states22:40:233
26249996132,7cyclictest33-21ksoftirqd/220:39:172
26249996132,7cyclictest33-21ksoftirqd/220:39:172
26249996130,4cyclictest33-21ksoftirqd/222:54:022
26249996130,4cyclictest33-21ksoftirqd/219:45:152
26249996130,4cyclictest33-21ksoftirqd/219:22:082
26249996129,5cyclictest33-21ksoftirqd/221:20:162
26249996128,5cyclictest33-21ksoftirqd/221:45:282
26249996122,6cyclictest33-21ksoftirqd/222:40:002
2624899612,25cyclictest0-21swapper/120:35:181
2624899612,25cyclictest0-21swapper/120:35:181
2624899610,58cyclictest13650-21diskstats23:20:151
2624899610,25cyclictest21058-21timerwakeupswit20:05:291
2624899610,25cyclictest21058-21timerwakeupswit20:05:291
26249996029,4cyclictest33-21ksoftirqd/221:06:182
26249996028,4cyclictest33-21ksoftirqd/221:39:482
26249996025,7cyclictest33-21ksoftirqd/220:43:452
2624899602,18cyclictest0-21swapper/100:20:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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