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2026-01-01 - 18:09
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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 Jan 01, 2026 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
256521070,5chrt2566-21basename08:10:170
193712930,6chrt19370-21/usr/sbin/munin08:55:351
12775999218,66cyclictest0-21swapper/108:35:131
12775999114,62cyclictest0-21swapper/107:50:231
12775999018,63cyclictest0-21swapper/110:55:121
12775998815,58cyclictest0-21swapper/109:05:141
12775998813,59cyclictest0-21swapper/108:20:131
1277599875,15cyclictest27625-21diskstats09:20:221
12775998715,62cyclictest0-21swapper/107:35:131
12775998616,57cyclictest0-21swapper/112:30:151
12775998615,64cyclictest0-21swapper/112:00:151
12775998615,58cyclictest0-21swapper/111:55:151
12775998515,60cyclictest0-21swapper/112:25:131
12775998514,62cyclictest0-21swapper/107:20:121
12775998415,59cyclictest0-21swapper/112:15:131
12775998412,60cyclictest0-21swapper/110:05:141
1277599836,10cyclictest0-21swapper/107:45:011
12775998315,58cyclictest0-21swapper/108:30:151
12775998315,56cyclictest0-21swapper/109:30:131
12775998314,62cyclictest0-21swapper/109:55:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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