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2026-06-22 - 08:03
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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 rack0slot5.osadl.org (updated Mon Jun 22, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39591199954423,520cyclictest0-21swapper/1421:44:026
395907899542542,0cyclictest0-21swapper/421:43:0210
39591199953613,522cyclictest0-21swapper/1421:50:026
39591149953630,505cyclictest0-21swapper/1221:35:024
39590729953431,503cyclictest0-21swapper/223:01:028
39590919951623,492cyclictest0-21swapper/719:28:0213
39590639951221,29cyclictest0-21swapper/021:33:020
395907899495495,0cyclictest4028060-21kworker/4:4+i915-unordered21:35:0210
395908699494492,2cyclictest4072407-21kworker/6:1+i915-unordered21:44:0212
39590639949030,459cyclictest0-21swapper/023:01:020
395911699486485,1cyclictest4116664-21kworker/13:2+i915-unordered22:38:025
395908699486484,2cyclictest4088371-21kworker/6:0+i915-unordered21:50:0212
395909799485484,1cyclictest0-21swapper/922:34:0215
39590639948421,462cyclictest0-21swapper/020:54:020
395911699482481,1cyclictest0-21swapper/1320:54:025
39590639948118,462cyclictest0-21swapper/021:44:020
39590919947729,28cyclictest0-21swapper/723:07:2413
39590639947727,29cyclictest0-21swapper/019:42:250
395911699473471,2cyclictest4077210-21kworker/13:1+i915-unordered21:36:025
39590919947223,31cyclictest0-21swapper/722:10:4513
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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