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2025-12-11 - 00:38
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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 10 highest latencies:
System rackcslot8.osadl.org (updated Wed Dec 10, 2025 12:49:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2503699360163,1cyclictest151rcu_preempt09:31:5419
2482912990,291ptp4l0-21swapper/107:05:391
2505499273111,2cyclictest151rcu_preempt11:36:4721
234662237230,6sleep90-21swapper/907:07:0631
205542202192,7sleep270-21swapper/2707:05:1620
24863991810,133cyclictest31564-21awk12:20:1226
248869917421,107cyclictest0-21swapper/709:20:2229
248869917221,149cyclictest0-21swapper/709:05:2429
248869916721,114cyclictest0-21swapper/711:50:0029
249479916332,103cyclictest0-21swapper/1510:51:537
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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