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2026-09-04 - 04:23
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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 rackeslot2.osadl.org (updated Fri Sep 04, 2026 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
322750521090,2sleep30-21swapper/320:39:413
331354921050,2sleep30-21swapper/321:34:443
33535402420,2sleep20-21swapper/221:54:522
34864152310,1sleep10-21swapper/123:09:591
31756832300,1sleep00-21swapper/019:59:460
36201302250,2sleep1191rcu_preempt00:26:441
310618899229,7cyclictest0-21swapper/000:29:250
310618899222,14cyclictest3233692-21apt-get20:44:230
3106188992214,5cyclictest3433607-21latency_hist22:40:010
3106188992212,6cyclictest3287080-21kthreadcore21:19:460
310618899214,16cyclictest0-21swapper/021:49:500
3106188992112,5cyclictest3631298-21irqcore00:34:450
3106188992111,6cyclictest3360728-21kthreadcore21:59:460
3106190992014,2cyclictest82050irq/121-eno122:54:421
3106190992014,2cyclictest82050irq/121-eno121:25:011
3106188992012,4cyclictest3310293-21kworker/u16:0-events_unbound21:53:490
3106188992011,4cyclictest3494985-21timerwakeupswit23:14:530
2447398200,4rtkit-daemon3274348-21diskmemload22:12:111
2447398200,3rtkit-daemon798-21mta-sts-daemon23:28:490
2447398200,3rtkit-daemon1415-21ntpd23:25:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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