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2026-03-25 - 07:10
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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 rackdslot0.osadl.org (updated Wed Mar 25, 2026 00:46:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3252899246,13cyclictest0-21swapper/019:56:260
3253499220,21cyclictest843-21systemd-network23:04:192
3252899223,11cyclictest0-21swapper/020:56:320
32534992118,2cyclictest9085-21mailstats20:20:222
3253499210,2cyclictest17341-21perf23:30:002
3253499202,15cyclictest0-21swapper/220:35:112
3252899200,17cyclictest0-21swapper/019:45:170
3253499192,16cyclictest0-21swapper/222:44:372
32534991917,1cyclictest0-21swapper/223:55:092
3253499191,2cyclictest20937-21python320:45:012
3253499190,5cyclictest0-21swapper/200:25:002
3253099192,3cyclictest0-21swapper/121:48:391
3253099191,17cyclictest16744-21snapd23:42:591
3252899192,2cyclictest26334-21chrt23:42:070
32528991917,1cyclictest0-21swapper/023:20:000
3253499182,15cyclictest2135-21readlink19:10:212
3253499182,15cyclictest0-21swapper/200:35:002
32534991816,1cyclictest0-21swapper/221:15:172
32534991816,1cyclictest0-21swapper/219:15:052
32534991816,1cyclictest0-21swapper/219:15:052
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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