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2026-03-26 - 12:45
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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 Thu Mar 26, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211959953332,500cyclictest0-21swapper/122:38:441
211959952314,45cyclictest0-21swapper/122:31:441
212099951924,494cyclictest0-21swapper/520:35:4411
2119599508495,0cyclictest191rcu_preempt22:51:441
2120999506504,2cyclictest29769-21kworker/5:0+i915-unordered19:26:4511
2120999506504,2cyclictest29769-21kworker/5:0+i915-unordered19:26:4511
2121799498498,0cyclictest0-21swapper/700:21:4413
212439948110,468cyclictest0-21swapper/1319:55:455
2119899481479,1cyclictest102199-21kworker/2:0+i915-unordered20:47:448
212399947423,450cyclictest0-21swapper/1222:31:444
212399947416,454cyclictest0-21swapper/1223:10:444
212179947024,29cyclictest0-21swapper/721:33:4413
212399946421,442cyclictest0-21swapper/1220:35:444
212399945915,440cyclictest133-21ksoftirqd/1200:21:444
21239994520,451cyclictest0-21swapper/1221:20:444
21239994510,450cyclictest0-21swapper/1222:38:444
21203994502,445cyclictest0-21swapper/320:33:289
211959944924,30cyclictest34-21ksoftirqd/123:31:441
2123999446445,1cyclictest1311rcuc/1222:51:444
212179944623,29cyclictest0-21swapper/700:27:4413
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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