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2025-12-18 - 08:51
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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 rack3slot6.osadl.org (updated Thu Dec 18, 2025 00:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31858999116,59cyclictest0-21swapper/122:10:141
99892900,4sleep19991-21sh00:10:171
31858998914,60cyclictest0-21swapper/123:10:111
3185299894,61cyclictest0-21swapper/021:49:060
3086328934,38sleep00-21swapper/019:05:230
31858998814,59cyclictest0-21swapper/123:20:161
3185899873,19cyclictest10545-21latency21:10:261
31858998615,58cyclictest0-21swapper/123:30:141
31858998614,61cyclictest0-21swapper/123:35:151
3185299864,62cyclictest0-21swapper/021:06:010
31858998515,58cyclictest0-21swapper/120:00:151
31858998515,57cyclictest0-21swapper/119:40:241
31858998515,56cyclictest0-21swapper/119:20:151
31858998514,59cyclictest0-21swapper/121:25:141
31858998514,58cyclictest0-21swapper/123:15:151
31858998514,58cyclictest0-21swapper/100:30:231
31858998511,18cyclictest20983-21aten2.4-expect21:40:271
31858998416,56cyclictest0-21swapper/122:50:131
31858998416,53cyclictest0-21swapper/120:10:101
31858998415,55cyclictest0-21swapper/100:20:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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