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2026-09-17 - 00:38
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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 Sep 16, 2026 12:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2023329718,37sleep10-21swapper/107:08:491
2053299896,18cyclictest16326-21apt-get11:30:140
205172890,8chrt20515-21munin-run08:40:000
1879828432,40sleep00-21swapper/007:05:170
2053299789,33cyclictest0-21swapper/010:30:250
20532997831,17cyclictest22752-21cat08:45:190
164962780,7sleep1251rcuc/111:30:171
20535997750,15cyclictest26-21ksoftirqd/112:30:221
20535997744,17cyclictest26-21ksoftirqd/108:05:141
20535997744,17cyclictest26-21ksoftirqd/108:05:141
2053299773,17cyclictest19875-21apt-get11:40:150
20532997634,10cyclictest26578-21df08:55:300
2053299762,39cyclictest24917-21cron11:55:000
2053299762,15cyclictest562-21runrttasks09:16:160
20535997545,19cyclictest26-21ksoftirqd/107:15:111
36312740,7chrt151rcu_preempt09:20:300
20535997443,22cyclictest26-21ksoftirqd/111:15:141
20532997441,18cyclictest14-21ksoftirqd/008:30:110
69862730,9sleep0171rcuc/009:30:280
20535997346,17cyclictest26-21ksoftirqd/111:00:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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