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2026-05-23 - 14:02
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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 rackfslot7.osadl.org (updated Sat May 23, 2026 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1859477991078,98cyclictest0-21swapper/523:00:155
1859455999475,19cyclictest0-21swapper/122:05:151
1859472998749,38cyclictest1908347-21kworker/0:220:48:264
1859489997838,40cyclictest30750irq/60-ahci[0000:00:07.0]21:20:377
1859489997436,38cyclictest2010190-21latency23:40:177
1859489997335,19cyclictest2027826-21runrttasks00:14:417
1859489997133,38cyclictest0-21swapper/719:50:477
1859462997113,19cyclictest191rcu_preempt00:05:162
1859489997032,38cyclictest0-21swapper/721:32:437
1859489997030,39cyclictest0-21swapper/723:03:117
1859489996930,39cyclictest0-21swapper/700:29:357
1859477996930,39cyclictest681rcuc/522:50:145
1859489996830,38cyclictest0-21swapper/721:40:397
1859472996628,38cyclictest2022180-21kworker/0:000:12:414
1859489996222,39cyclictest0-21swapper/720:10:037
1859489996017,19cyclictest1973344-21munin-run22:35:017
185948999580,39cyclictest1987005-21cat23:00:017
1859451995839,19cyclictest0-21swapper/023:30:160
1859489995737,20cyclictest1086-21runrttasks19:46:037
1859489995637,19cyclictest1086-21runrttasks21:15:317
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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