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2026-09-16 - 02:37
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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 Tue Sep 15, 2026 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89246399130128,1cyclictest0-21swapper/112:40:021
892466997416,39cyclictest976359-21sed09:40:184
892466997335,19cyclictest1-21systemd07:35:024
892466997214,39cyclictest1044147-21taskset11:45:134
892466997032,19cyclictest898419-21aten2.4-expect07:20:144
892466997012,39cyclictest236199-21snmpd09:00:324
892466997012,39cyclictest1039213-21idleruntime11:35:164
892466996729,19cyclictest601ktimers/408:30:224
892466996729,18cyclictest0-21swapper/412:19:224
892466996728,20cyclictest0-21swapper/411:08:104
892466996728,19cyclictest0-21swapper/409:52:304
892466996728,19cyclictest0-21swapper/409:52:304
892466996527,38cyclictest1069831-21grep12:30:224
892466996425,19cyclictest0-21swapper/411:02:224
892466996324,19cyclictest0-21swapper/408:36:144
892466995718,18cyclictest971027-21ntpq09:30:204
892466995638,18cyclictest601ktimers/412:36:144
892466995518,18cyclictest1063646-21diskstats12:20:144
892467995412,18cyclictest0-21swapper/510:50:165
892466995434,19cyclictest1011175-21cut10:45:024
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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