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2026-07-06 - 02:55
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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 Mon Jul 06, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1178024534,0sleep00-21swapper/019:24:320
1188823727,0sleep20-21swapper/219:25:502
1187823727,0sleep30-21swapper/319:25:433
1173023324,0sleep10-21swapper/119:24:011
339960,0migration/36696-21taskset23:44:523
339960,0migration/310737-21munin-node00:07:113
29815060,0irq/29-eth0-tx-0-21swapper/223:29:172
29815060,0irq/29-eth0-tx-0-21swapper/020:57:080
29805060,0irq/28-eth0-rx-7294-21nfs_client00:02:183
29805060,0irq/28-eth0-rx-23679-21perl00:52:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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