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2025-10-29 - 01:58
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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 Tue Oct 28, 2025 12:49:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26062311302,7sleep210-21swapper/2107:05:3514
38142187180,6sleep80-21swapper/807:07:3030
5213991725,114cyclictest0-21swapper/2112:30:1114
52119917016,100cyclictest0-21swapper/2010:45:1413
5254991699,128cyclictest0-21swapper/3010:01:4524
5254991699,128cyclictest0-21swapper/3010:01:4524
52119916916,103cyclictest0-21swapper/2007:25:2413
5254991679,147cyclictest0-21swapper/3010:18:2124
5254991669,115cyclictest0-21swapper/3010:30:0624
52119916038,47cyclictest137-21ksoftirqd/2012:28:5413
52269915932,92cyclictest151rcu_preempt12:09:0617
5179991584,153cyclictest0-21swapper/1307:20:425
5197991579,139cyclictest0-21swapper/1711:05:419
5226991560,151cyclictest0-21swapper/2412:20:0717
5179991565,139cyclictest0-21swapper/1311:44:385
5254991559,102cyclictest0-21swapper/3011:58:1724
52119915516,102cyclictest0-21swapper/2010:27:2013
5179991555,110cyclictest0-21swapper/1310:36:305
5179991554,110cyclictest0-21swapper/1309:15:315
5179991554,110cyclictest0-21swapper/1309:15:315
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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