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2025-07-17 - 05:06
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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 rackdslot1.osadl.org (updated Thu Jul 17, 2025 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
318822710,4sleep30-21swapper/322:20:213
2847191710,30ptp4l20161-21iostat_ios21:55:200
2847191620,5ptp4l0-21swapper/319:50:143
2847191610,4ptp4l0-21swapper/000:35:220
272472600,5sleep10-21swapper/121:00:221
2847191590,3ptp4l0-21swapper/223:05:152
2847191590,3ptp4l0-21swapper/219:05:242
2847191590,3ptp4l0-21swapper/123:31:161
2847191580,4ptp4l0-21swapper/219:12:412
2847191580,3ptp4l0-21swapper/320:56:163
2847191570,4ptp4l0-21swapper/321:14:583
2847191570,3ptp4l0-21swapper/220:24:422
2847191570,3ptp4l0-21swapper/022:20:000
2847191570,16ptp4l12367-21rt-features23:55:253
2847191560,3ptp4l0-21swapper/221:49:112
2847191560,3ptp4l0-21swapper/221:10:172
86032550,5sleep0732699cyclictest22:40:140
2847191550,3ptp4l0-21swapper/200:19:042
2847191550,3ptp4l0-21swapper/200:19:042
2847191540,3ptp4l0-21swapper/322:38:093
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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