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2025-12-30 - 10:22
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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 10 highest latencies:
System rackfslot7.osadl.org (updated Tue Dec 30, 2025 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3985857991060,105cyclictest0-21swapper/219:47:412
3985862998080,0cyclictest0-21swapper/722:50:177
3985856997314,20cyclictest876-21mta-sts-daemon21:04:331
3985856997133,19cyclictest4137559-21diskstats23:35:151
3985856997113,19cyclictest4092475-21ntpq22:15:181
3985856997032,19cyclictest1-21systemd20:35:011
3985862996932,18cyclictest871ktimers/719:30:167
3985856996931,19cyclictest4057641-21df_inode21:15:151
398585899657,19cyclictest0-21swapper/323:45:163
3985858996426,19cyclictest4077572-21kworker/u32:1+events_unbound00:05:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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