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2026-09-06 - 02:15
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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 rack0slot5.osadl.org (updated Sun Sep 06, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
364496699749329,419cyclictest0-21swapper/120:16:201
364496699747328,418cyclictest0-21swapper/120:41:231
36449709956817,29cyclictest0-21swapper/221:45:388
364497899502499,2cyclictest3775197-21kworker/4:0+i915-unordered21:46:3810
364501699495494,1cyclictest3770290-21kworker/13:0+i915-unordered21:55:385
364499799485484,1cyclictest0-21swapper/923:00:3815
364499799483482,1cyclictest0-21swapper/921:03:3815
364496699482481,1cyclictest3662586-21kworker/1:0+i915-unordered19:26:381
364496699482481,1cyclictest3662586-21kworker/1:0+i915-unordered19:26:381
364500099477476,1cyclictest3770245-21kworker/10:0+i915-unordered21:45:382
364500099475474,1cyclictest0-21swapper/1021:06:382
364501699473473,0cyclictest0-21swapper/1323:35:385
36449839947323,30cyclictest0-21swapper/521:24:2411
364497899471471,0cyclictest3742040-21kworker/4:1+i915-unordered22:01:3810
36449839947022,30cyclictest0-21swapper/520:22:5911
36449649947022,29cyclictest0-21swapper/021:02:010
364497899467466,1cyclictest3742040-21kworker/4:1+i915-unordered23:11:3810
364499399465465,0cyclictest0-21swapper/822:32:3814
3644993994620,461cyclictest0-21swapper/821:45:3814
364500099460458,2cyclictest1818-21snmpd19:53:352
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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