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2026-05-20 - 03:31
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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 Wed May 20, 2026 00:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
108062232168,22sleep10-21swapper/119:08:431
105652212151,50sleep20-21swapper/219:05:352
139491207173,23phc2sys0-21swapper/319:05:453
108052202169,22sleep00-21swapper/019:08:420
2855921360,5sleep01119899cyclictest19:45:170
53652720,1sleep00-21swapper/022:15:240
163402710,1sleep00-21swapper/019:20:130
270342660,2sleep20-21swapper/221:55:162
226262600,4sleep222630-21irqrtprio21:45:202
139391590,1ptp4l28520-21ls20:50:203
71252580,2sleep20-21swapper/221:15:002
1120199550,53cyclictest17921-21kworker/3:221:43:133
1120199510,16cyclictest7373-21cat21:15:153
1120199490,16cyclictest18580-21/usr/sbin/munin22:45:263
1120199480,10cyclictest28081-21apt-get23:05:113
1120199466,5cyclictest41-21ksoftirqd/322:14:143
1120199466,5cyclictest41-21ksoftirqd/322:14:143
1120199460,17cyclictest15974-21/usr/sbin/munin19:20:243
139391430,0ptp4l401ktimersoftd/300:01:543
1120199430,15cyclictest31344-21ssh00:15:263
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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