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2026-04-23 - 00:03
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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 Wed Apr 22, 2026 12:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1011087991055,99cyclictest0-21swapper/209:40:172
1011090999475,19cyclictest0-21swapper/509:15:175
1011088997939,39cyclictest1175288-21grep12:05:193
1011088997537,19cyclictest1019782-21kworker/3:1+events11:47:183
1011088997417,38cyclictest870-21mta-sts-daemon10:35:583
1011088997416,39cyclictest1133766-21ntpq10:50:203
1011088997215,38cyclictest0-21swapper/312:10:093
1011088997131,39cyclictest0-21swapper/310:27:383
1011088997113,58cyclictest0-21swapper/308:20:173
1011088997032,19cyclictest362-21jbd2/sda2-812:21:223
1011088997012,39cyclictest1012704-21ntp_states07:10:213
1011088997011,59cyclictest0-21swapper/309:35:153
1011088996932,18cyclictest511ktimers/309:16:263
1011088996829,39cyclictest877-21mta-sts-daemon10:10:233
1011088996810,39cyclictest1153927-21taskset11:27:093
101108899656,40cyclictest1045341-21hddtemp_smartct08:10:143
1011088996425,19cyclictest0-21swapper/309:50:383
101108899630,59cyclictest1143021-21taskset11:07:163
101109299622,59cyclictest0-21swapper/709:35:157
1011088996243,19cyclictest0-21swapper/311:50:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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