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2025-12-13 - 08:42
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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 Sat Dec 13, 2025 00:48:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
330891192182,5phc2sys0-21swapper/219:05:1412
89529913967,71cyclictest0-21swapper/1719:51:059
89529913865,71cyclictest0-21swapper/1721:01:099
89529913865,71cyclictest0-21swapper/1721:01:099
89529913767,70cyclictest0-21swapper/1722:20:529
89529913660,75cyclictest0-21swapper/1722:57:199
89529913568,66cyclictest0-21swapper/1719:34:379
89529913563,72cyclictest0-21swapper/1721:29:149
89529913563,72cyclictest0-21swapper/1721:29:149
89529913562,72cyclictest0-21swapper/1721:50:319
89529913562,72cyclictest0-21swapper/1721:50:319
89529913561,73cyclictest0-21swapper/1721:32:559
89529913561,73cyclictest0-21swapper/1721:32:559
89529913561,73cyclictest0-21swapper/1721:11:229
89529913561,73cyclictest0-21swapper/1721:11:229
89529913561,73cyclictest0-21swapper/1720:13:129
2219521350,2sleep250-21swapper/2523:35:2418
89529913468,66cyclictest0-21swapper/1720:01:359
89529913468,66cyclictest0-21swapper/1719:24:259
89529913467,66cyclictest0-21swapper/1722:11:139
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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