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2026-03-12 - 15:40
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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 Thu Mar 12, 2026 12:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
110807199940,15cyclictest0-21swapper/409:45:154
1108067998911,19cyclictest0-21swapper/012:00:140
1108073997638,19cyclictest781ktimers/610:19:366
1108073997618,39cyclictest1282730-21ntp_states12:25:196
1108073997435,38cyclictest1187987-21kworker/u32:2+events_unbound10:30:126
1108073997214,19cyclictest0-21swapper/612:15:546
1108073997210,39cyclictest1136635-21/usr/sbin/munin08:00:146
110807399708,59cyclictest0-21swapper/610:29:296
110807399699,40cyclictest1113423-21grep07:19:596
110807399687,39cyclictest1086-21runrttasks08:40:486
1108073996828,39cyclictest0-21swapper/609:20:426
1108073996826,39cyclictest1086-21runrttasks09:00:516
110807399678,39cyclictest781ktimers/611:10:356
1108073996730,18cyclictest0-21swapper/608:05:166
110807399666,19cyclictest0-21swapper/608:39:386
110807399663,40cyclictest1150105-21latency_hist08:25:026
110807399646,39cyclictest1279704-21cat12:20:186
110807399646,39cyclictest1279704-21cat12:20:176
1108073996426,19cyclictest1131824-21sh07:50:196
1108073996426,18cyclictest0-21swapper/611:30:586
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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