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2026-04-04 - 19:18
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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 Sat Apr 04, 2026 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
341128930,49sleep10-21swapper/107:06:591
3882998044,16cyclictest14-21ksoftirqd/011:05:170
3882998044,15cyclictest14-21ksoftirqd/012:05:170
351527922,45sleep00-21swapper/007:08:070
3882997332,20cyclictest4807-21python307:10:320
3882997332,20cyclictest4807-21python307:10:320
388299716,22cyclictest29193-21apt-get09:50:130
3885997026,39cyclictest26-21ksoftirqd/107:15:031
3882997041,15cyclictest14-21ksoftirqd/008:55:270
3882997032,11cyclictest14-21ksoftirqd/010:55:180
3885996937,23cyclictest15143-31frcode07:40:181
3882996930,16cyclictest10164-21aten2.4-expect07:25:270
3885996848,9cyclictest26-21ksoftirqd/107:30:131
3882996835,11cyclictest14-21ksoftirqd/007:39:250
3885996722,10cyclictest26-21ksoftirqd/112:03:391
3882996746,16cyclictest14-21ksoftirqd/009:35:330
3882996745,16cyclictest503-21snmpd08:10:340
3882996736,17cyclictest14-21ksoftirqd/009:30:160
3882996734,12cyclictest14-21ksoftirqd/011:55:260
3882996731,30cyclictest14-21ksoftirqd/007:55:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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