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2026-03-17 - 14:27
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7.osadl.org (updated Tue Mar 17, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
104969911948,41cyclictest10478-21cyclictest19:58:531
104969911941,35cyclictest0-21swapper/121:19:541
2213221050,7sleep10-21swapper/122:05:221
10496991054,78cyclictest30516-21ssh21:25:311
104969910538,36cyclictest0-21swapper/120:00:191
10496991053,70cyclictest8100-21ssh22:35:271
861121030,8sleep1301ktimers/100:25:031
10496991033,83cyclictest20641-21apt-get21:10:211
10496991002,29cyclictest19689-21sh21:07:271
10496999925,43cyclictest0-21swapper/123:55:161
10496999925,43cyclictest0-21swapper/123:55:161
1049699992,33cyclictest352-21runrttasks22:16:351
10487999971,21cyclictest0-21swapper/000:30:330
10496999645,40cyclictest0-21swapper/123:50:091
10496999645,40cyclictest0-21swapper/123:50:091
1049699943,7cyclictest0-21swapper/121:40:191
1049699943,7cyclictest0-21swapper/121:40:191
10487999465,19cyclictest0-21swapper/021:00:070
10487999254,7cyclictest181rcu_preempt21:40:170
10487999254,7cyclictest181rcu_preempt21:40:170
10508999175,10cyclictest16139-21kworker/u17:2-rpciod22:50:282
1049699913,8cyclictest0-21swapper/123:40:211
1049699912,32cyclictest13530-21diskmemload23:38:291
10508999069,12cyclictest0-21swapper/219:40:082
1049699902,28cyclictest352-21runrttasks19:22:231
1049699902,28cyclictest352-21runrttasks19:22:231
10487999066,9cyclictest181rcu_preempt20:35:280
10508998969,10cyclictest0-21swapper/221:45:312
1049699898,66cyclictest4780-21apt-get22:30:211
1049699898,66cyclictest4780-21apt-get22:30:211
1049699893,27cyclictest352-21runrttasks19:30:491
10487998951,29cyclictest7919-21modprobe20:35:050
10508998866,16cyclictest544-21cron21:15:062
10508998866,16cyclictest450-21sh22:22:542
10496998841,40cyclictest0-21swapper/122:00:211
1049699882,39cyclictest32616-21ssh23:15:341
1049699882,39cyclictest32616-21ssh23:15:341
10508998770,10cyclictest0-21swapper/223:56:382
10508998770,10cyclictest0-21swapper/223:56:382
10508998769,11cyclictest0-21swapper/222:31:252
10508998769,11cyclictest0-21swapper/222:31:252
1049699873,7cyclictest0-21swapper/120:35:191
1049699863,39cyclictest4181-21ssh21:35:241
1049699863,33cyclictest11168-21latency_hist20:45:081
1048799863,36cyclictest4241-21apt-get22:30:520
1048799863,36cyclictest4241-21apt-get22:30:520
10508998569,9cyclictest0-21swapper/219:25:072
10508998569,9cyclictest0-21swapper/219:25:072
10508998567,10cyclictest0-21swapper/219:15:082
10508998567,10cyclictest0-21swapper/219:15:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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