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2026-05-08 - 22:45
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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 rackfslot7.osadl.org (updated Fri May 08, 2026 12:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3599767991500,148cyclictest0-21swapper/607:20:016
359976499667,39cyclictest0-21swapper/312:15:153
3599764996159,1cyclictest0-21swapper/307:35:163
3599765995838,19cyclictest3691740-21df09:55:124
359976599580,57cyclictest0-21swapper/411:07:104
3599765995737,19cyclictest601ktimers/412:02:314
3599765995715,40cyclictest3645216-21irqstats08:30:174
3599765995617,19cyclictest3718780-21munin-run10:45:014
3599765995614,40cyclictest3720922-21taskset10:47:074
359976599560,54cyclictest0-21swapper/410:55:304
3599765995537,18cyclictest601ktimers/408:17:244
3599765995519,35cyclictest0-21swapper/408:07:004
3599765995519,35cyclictest0-21swapper/407:55:054
3599765995517,19cyclictest3709113-21sendmail_mailst10:25:194
359976899540,35cyclictest3677361-21kworker/u32:2+events_unbound11:15:157
3599765995436,18cyclictest1214924-21munin-node12:39:394
3599765995435,19cyclictest601ktimers/408:53:054
3599765995435,19cyclictest601ktimers/408:53:044
3599765995434,19cyclictest3653028-21/usr/sbin/munin08:45:154
3599765995419,34cyclictest0-21swapper/411:51:184
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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