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2026-06-11 - 12:45
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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 Thu Jun 11, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1844495997535,39cyclictest876-21mta-sts-daemon23:05:267
1844495997333,39cyclictest0-21swapper/721:39:277
1844495997234,19cyclictest1987967-21munin-run23:30:017
1844495997232,39cyclictest0-21swapper/720:11:517
1844495997232,39cyclictest0-21swapper/719:23:437
1844495997012,19cyclictest0-21swapper/723:40:207
1844495996930,39cyclictest0-21swapper/722:32:597
1844495996626,39cyclictest0-21swapper/721:45:077
184449599635,39cyclictest2009906-21taskset00:06:057
1844495995921,19cyclictest1993033-21unixbench_multi23:35:237
1844495995855,2cyclictest1921980-21/usr/sbin/munin21:30:177
1844495995719,19cyclictest871ktimers/721:52:097
1844495995613,19cyclictest0-21swapper/722:05:157
184449599560,55cyclictest0-21swapper/723:30:217
1844495995516,38cyclictest101550irq/39-eno2-TxRx-020:09:417
1844495995512,19cyclictest0-21swapper/723:50:147
1844495995512,19cyclictest0-21swapper/720:45:167
184449599550,54cyclictest0-21swapper/700:35:217
1844495995436,18cyclictest1959567-21unixbench_singl22:35:227
1844495995419,35cyclictest0-21swapper/723:17:517
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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