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2026-03-19 - 23:50
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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 19, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1467887991200,118cyclictest0-21swapper/007:55:110
1467894997876,1cyclictest876-21mta-sts-daemon12:10:117
1467890997739,19cyclictest511ktimers/308:42:493
1467887997355,18cyclictest171ktimers/012:30:140
1467890996930,39cyclictest0-21swapper/309:21:463
1467890996728,39cyclictest0-21swapper/311:26:423
1467890996627,39cyclictest0-21swapper/308:46:543
1467890996627,39cyclictest0-21swapper/307:25:403
1467890996627,39cyclictest0-21swapper/307:25:403
1467890996622,40cyclictest1504853-21if_err_eno608:15:163
1467894996528,18cyclictest88-21ksoftirqd/707:20:157
1467893996427,19cyclictest1467473-21kworker/6:0+events_power_efficient11:33:556
1467890996426,38cyclictest0-21swapper/309:40:283
1467890996426,38cyclictest0-21swapper/308:03:403
1467890996425,39cyclictest0-21swapper/311:46:043
1467890996425,39cyclictest0-21swapper/310:58:443
1467890996425,39cyclictest0-21swapper/310:01:123
1467890996425,39cyclictest0-21swapper/309:34:443
1467890996425,39cyclictest0-21swapper/308:11:443
1467890996425,18cyclictest1558898-21grep09:55:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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