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2025-07-09 - 08:46
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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 Wed Jul 09, 2025 00:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
733421000,6chrt7339-21unixbench_multi20:45:380
4486999463,18cyclictest26-21ksoftirqd/123:20:181
4486999369,15cyclictest26-21ksoftirqd/100:00:121
4486999364,16cyclictest26-21ksoftirqd/120:25:171
4486999363,20cyclictest26-21ksoftirqd/122:35:161
4486999268,16cyclictest26-21ksoftirqd/122:40:161
4486999264,18cyclictest26-21ksoftirqd/120:50:161
4486999060,20cyclictest26-21ksoftirqd/119:25:121
4486998963,17cyclictest26-21ksoftirqd/122:45:161
4484998935,36cyclictest14-21ksoftirqd/019:40:140
4486998863,16cyclictest26-21ksoftirqd/121:25:241
4486998859,19cyclictest26-21ksoftirqd/122:20:131
4486998858,19cyclictest26-21ksoftirqd/119:10:131
4486998758,19cyclictest26-21ksoftirqd/120:05:131
4484998746,21cyclictest14-21ksoftirqd/023:30:140
4486998654,21cyclictest26-21ksoftirqd/121:10:121
321902860,4chrt0-21swapper/020:25:270
4486998555,20cyclictest26-21ksoftirqd/100:30:131
4486998553,18cyclictest26-21ksoftirqd/122:55:131
4486998551,19cyclictest26-21ksoftirqd/119:45:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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