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2026-04-19 - 01:13
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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
Characteristics of the 20 highest latencies:
System rackdslot3.osadl.org (updated Sat Apr 18, 2026 12:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491222155,22phc2sys0-21swapper/307:06:593
101232204170,23sleep00-21swapper/007:07:480
101242203169,22sleep10-21swapper/107:07:491
101252202169,22sleep20-21swapper/207:07:502
10592997334,8cyclictest25-21ksoftirqd/108:20:001
10592996731,8cyclictest25-21ksoftirqd/108:40:001
10592996629,4cyclictest25-21ksoftirqd/108:30:171
10592996429,9cyclictest25-21ksoftirqd/109:15:201
10592996131,4cyclictest25-21ksoftirqd/109:10:241
10592996130,8cyclictest25-21ksoftirqd/108:40:111
10592996026,4cyclictest25-21ksoftirqd/112:00:181
10591996029,3cyclictest9-21ksoftirqd/008:50:160
10592995922,4cyclictest25-21ksoftirqd/111:10:161
10591995928,3cyclictest9-21ksoftirqd/012:30:150
10592995826,4cyclictest25-21ksoftirqd/111:30:151
10592995825,7cyclictest25-21ksoftirqd/109:45:001
10592995822,3cyclictest25-21ksoftirqd/109:25:151
10591995831,3cyclictest9-21ksoftirqd/010:35:240
171942570,4sleep2321ktimersoftd/208:30:172
10592995720,4cyclictest25-21ksoftirqd/109:35:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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