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2026-06-10 - 07:01
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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 Wed Jun 10, 2026 00:43:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3899575995630,42cyclictest0-21swapper/1121:13:253
38995709955620,535cyclictest0-21swapper/1023:05:242
38995709955620,535cyclictest0-21swapper/1023:05:242
38995759955432,521cyclictest0-21swapper/1121:26:253
38995659954624,521cyclictest0-21swapper/920:23:2515
3899570995265,519cyclictest0-21swapper/1023:46:242
38995759952534,490cyclictest0-21swapper/1100:13:243
3899570995160,515cyclictest0-21swapper/1023:38:242
389955999515514,1cyclictest4009214-21kworker/7:2+i915-unordered21:33:2513
389956599508508,0cyclictest0-21swapper/919:30:2515
38995399950615,490cyclictest0-21swapper/221:53:258
3899575995031,498cyclictest0-21swapper/1121:06:253
38995889949318,0cyclictest0-21swapper/1420:54:256
38995709948914,59cyclictest0-21swapper/1000:02:202
389955999489486,1cyclictest0-21swapper/720:54:2513
38995889948630,454cyclictest0-21swapper/1423:38:246
389959399485484,1cyclictest0-21swapper/1521:44:257
3899588994856,0cyclictest0-21swapper/1422:35:256
3899575994809,59cyclictest0-21swapper/1121:08:253
389957099477475,2cyclictest4049409-21kworker/10:2+i915-unordered22:35:252
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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