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2026-04-08 - 00:28
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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 Tue Apr 07, 2026 12:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17899996932,9cyclictest25-21ksoftirqd/110:05:271
32162660,4sleep30-21swapper/310:05:233
17901996524,5cyclictest41-21ksoftirqd/307:21:023
17901996432,4cyclictest41-21ksoftirqd/307:40:363
17901996421,7cyclictest41-21ksoftirqd/308:41:423
17899996317,7cyclictest25-21ksoftirqd/111:30:151
1789899611,8cyclictest9-21ksoftirqd/007:36:150
193872600,4sleep00-21swapper/008:20:260
17899996022,3cyclictest121rcu_preempt11:05:211
134491600,4ptp4l4222-21apt-get09:00:122
17899995920,5cyclictest25-21ksoftirqd/112:30:241
17899995920,5cyclictest25-21ksoftirqd/112:30:241
134491590,4ptp4l17788-21chrt08:19:312
17899995828,9cyclictest25-21ksoftirqd/111:16:031
17899995826,8cyclictest25-21ksoftirqd/110:10:181
134491580,5ptp4l0-21swapper/207:08:252
134491580,4ptp4l0-21swapper/008:36:040
17901995724,7cyclictest41-21ksoftirqd/309:25:223
134491570,3ptp4l3203-21ls12:25:232
134491570,3ptp4l0-21swapper/311:05:133
17901995620,9cyclictest41-21ksoftirqd/309:50:143
134491560,4ptp4l0-21swapper/211:08:312
134491560,3ptp4l0-21swapper/312:05:173
17901995521,4cyclictest41-21ksoftirqd/307:13:483
17901995517,9cyclictest41-21ksoftirqd/311:15:183
17901995517,10cyclictest41-21ksoftirqd/307:55:003
17899995526,8cyclictest25-21ksoftirqd/110:30:181
17899995520,7cyclictest25-21ksoftirqd/111:35:251
17899995520,6cyclictest25-21ksoftirqd/109:05:001
17899995518,9cyclictest25-21ksoftirqd/107:20:161
134491550,4ptp4l0-21swapper/310:29:423
134491550,4ptp4l0-21swapper/007:55:110
134491550,4ptp4l0-21swapper/007:55:110
134491550,3ptp4l0-21swapper/212:00:452
134491550,3ptp4l0-21swapper/209:28:172
134491550,3ptp4l0-21swapper/109:25:251
134491550,3ptp4l0-21swapper/010:59:200
134491550,3ptp4l0-21swapper/009:44:400
17901995419,9cyclictest41-21ksoftirqd/310:57:163
17899995442,3cyclictest25-21ksoftirqd/109:55:261
17899995434,5cyclictest25-21ksoftirqd/110:45:131
134491540,4ptp4l32448-21df_abs12:20:150
134491540,4ptp4l0-21swapper/011:41:140
134491540,4ptp4l0-21swapper/011:41:140
134491540,3ptp4l0-21swapper/310:01:383
134491540,3ptp4l0-21swapper/208:40:362
134491540,3ptp4l0-21swapper/009:16:520
134491540,2ptp4l0-21swapper/010:50:150
17901995321,9cyclictest41-21ksoftirqd/308:30:213
17901995316,4cyclictest41-21ksoftirqd/312:04:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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