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2026-04-04 - 01:58
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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 rackcslot4.osadl.org (updated Fri Apr 03, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1535002266190,28sleep10-21swapper/107:05:041
1551092256184,57sleep00-21swapper/007:08:240
2954012760,1chrt295402-21/usr/sbin/munin11:15:201
179699650,4rtkit-daemon1795-21rtkit-daemon07:56:551
15540099601,7cyclictest329640-21apt-get12:05:131
155400995613,27cyclictest317456-21sh11:46:521
15540099552,8cyclictest204395-21apt-get09:10:121
15540099552,3cyclictest208134-21apt-get09:15:131
179699540,3rtkit-daemon1795-21rtkit-daemon11:19:460
15540099542,8cyclictest336488-21apt-get12:15:141
15540099542,6cyclictest332983-21apt-get12:10:111
15540099542,6cyclictest188275-21apt-get08:30:131
179699530,4rtkit-daemon1795-21rtkit-daemon10:14:370
15540099532,6cyclictest269365-21apt-get10:40:131
15540099521,6cyclictest301542-21apt-get11:25:151
15540099520,9cyclictest287354-21perl11:05:151
2730282510,2sleep0161rcuc/010:45:160
2359682510,3chrt0-21swapper/009:52:420
179699510,3rtkit-daemon1795-21rtkit-daemon11:50:350
15540099512,7cyclictest350596-21apt-get12:35:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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