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2026-06-29 - 03:05
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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 rackdslot3.osadl.org (updated Sun Jun 28, 2026 12:45:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491210175,23phc2sys0-21swapper/307:05:373
10992205170,24sleep20-21swapper/207:07:292
12902204171,22sleep10-21swapper/107:09:541
10652204171,22sleep00-21swapper/007:07:030
2937821410,4sleep2161699cyclictest09:15:142
139391830,2ptp4l391rcuc/307:40:183
139391760,1ptp4l4430-21cstates11:45:143
161699664,22cyclictest26633-21latency_hist11:25:002
161699590,24cyclictest9265-21sed10:45:262
161699590,23cyclictest25453-21dpkg10:15:012
161699590,22cyclictest3299-21sed07:10:272
159382590,4sleep10-21swapper/111:00:191
161699580,31cyclictest17433-21grep07:40:232
161699580,23cyclictest5579-21timerandwakeup07:15:262
134491580,5getstats161799cyclictest07:26:053
161699561,19cyclictest0-21swapper/212:20:252
139391550,1ptp4l401ktimersoftd/310:09:043
161699530,26cyclictest24714-21sort09:05:162
168902520,2sleep00-21swapper/012:10:190
161699520,23cyclictest207-21systemd-journal08:45:252
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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