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2026-04-27 - 22:26
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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 20 highest latencies:
System rackcslot8.osadl.org (updated Mon Apr 27, 2026 12:49:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273913200,312ptp4l0-21swapper/107:06:391
215369925720,44cyclictest151rcu_preempt10:32:251
21586991730,168cyclictest151rcu_preempt10:14:435
203182165158,6sleep290-21swapper/2907:09:1822
215869915934,92cyclictest0-21swapper/1312:01:375
21622991565,123cyclictest151rcu_preempt10:25:5313
21586991540,148cyclictest151rcu_preempt07:28:005
21586991540,148cyclictest151rcu_preempt07:28:005
215699914352,61cyclictest0-21swapper/911:26:1731
215869914230,83cyclictest0-21swapper/1311:28:295
21639991400,81cyclictest0-21swapper/2412:21:0517
215699914053,56cyclictest0-21swapper/912:15:5931
215699914048,62cyclictest0-21swapper/911:19:5931
21639991390,86cyclictest0-21swapper/2411:45:1617
215869913931,79cyclictest0-21swapper/1310:08:065
216399913824,72cyclictest0-21swapper/2409:52:1317
21626991380,88cyclictest0-21swapper/2111:22:4414
215869913825,70cyclictest0-21swapper/1309:58:415
215699913843,59cyclictest0-21swapper/910:02:2231
216399913723,70cyclictest0-21swapper/2409:19:5317
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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