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2026-03-06 - 22:50
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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 rack3slot6.osadl.org (updated Fri Mar 06, 2026 12:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
680121070,6sleep10-21swapper/108:50:231
2595999669,17cyclictest14-21ksoftirqd/010:10:120
2595999668,18cyclictest14-21ksoftirqd/011:50:110
2595998755,18cyclictest14-21ksoftirqd/007:30:130
259599863,75cyclictest16676-21sendmail09:20:010
2595998613,60cyclictest0-21swapper/010:30:120
259599858,66cyclictest28828-21apt-get11:25:110
2595998532,48cyclictest250-21systemd-journal09:39:590
259599846,18cyclictest1003-21apt-get08:35:140
2595998429,50cyclictest4295-21seq11:45:260
2595998415,15cyclictest8106-21aten2.4-expect08:55:150
2595998314,54cyclictest0-21swapper/008:20:120
2595998222,53cyclictest21403-21date12:35:000
259599813,71cyclictest548-21runrttasks10:45:390
259599807,19cyclictest14550-21apt-get12:15:120
259599807,17cyclictest414-21apt-get10:05:150
2595998020,50cyclictest13319-31find07:35:390
2595998013,55cyclictest0-21swapper/009:05:130
20462805,63sleep00-21swapper/007:06:090
259599789,20cyclictest17637-21apt-get07:50:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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