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2026-04-28 - 17:29
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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 10 highest latencies:
System rack1slot2.osadl.org (updated Tue Apr 28, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
609529493,0sleep00-21swapper/007:19:200
593725655,0sleep10-21swapper/107:17:371
6348995353,0cyclictest2689-21md0_resync08:45:381
6349994747,0cyclictest2688-21md1_resync08:45:382
616224132,0sleep20-21swapper/207:20:022
3151723927,0sleep30-21swapper/307:16:233
6347993535,0cyclictest5517-21kworker/0:008:45:380
329970,0watchdog/319341-21processes10:11:443
8305060,0irq/26-0000:00:7345-21perl07:21:373
8305060,0irq/26-0000:00:26123-21munin-node08:36:433
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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