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2026-03-30 - 03:56
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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 50 highest latencies:
System rackdslot1.osadl.org (updated Sun Mar 29, 2026 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1980421480,6sleep0732799cyclictest09:55:150
289762720,5sleep30-21swapper/309:05:173
134491630,5ptp4l0-21swapper/211:00:122
7327996022,4cyclictest9-21ksoftirqd/009:05:010
134491590,4ptp4l13221-21iostat_ios10:50:181
134491590,3ptp4l30964-21diskstats08:00:151
134491590,3ptp4l0-21swapper/107:46:591
134491580,5ptp4l0-21swapper/207:15:112
134491580,4ptp4l12390-21users11:55:292
134491580,3ptp4l20171-21cstates12:15:140
134491580,3ptp4l0-21swapper/107:30:221
134491580,3ptp4l0-21swapper/107:15:151
202462570,5sleep10-21swapper/112:15:131
134491570,4ptp4l0-21swapper/210:55:192
134491570,3ptp4l0-21swapper/208:37:042
134491560,5ptp4l0-21swapper/107:06:051
134491560,4ptp4l0-21swapper/311:51:103
134491560,4ptp4l0-21swapper/307:13:433
134491560,4ptp4l0-21swapper/211:35:272
134491560,4ptp4l0-21swapper/011:50:350
134491560,3ptp4l0-21swapper/112:22:491
134491560,3ptp4l0-21swapper/109:05:191
134491550,5ptp4l0-21swapper/007:34:180
134491550,4ptp4l0-21swapper/208:26:452
134491550,3ptp4l0-21swapper/307:50:013
134491550,3ptp4l0-21swapper/212:35:242
134491550,3ptp4l0-21swapper/109:34:571
134491550,3ptp4l0-21swapper/107:50:131
134491550,3ptp4l0-21swapper/007:54:060
134491550,11ptp4l4994-21apt-get07:05:130
134491540,4ptp4l0-21swapper/009:15:280
134491540,3ptp4l0-21swapper/210:30:282
134491540,3ptp4l0-21swapper/210:17:442
134491530,4ptp4l0-21swapper/311:24:013
732799524,3cyclictest9-21ksoftirqd/009:44:590
134491520,4ptp4l0-21swapper/108:41:511
134491520,3ptp4l0-21swapper/211:20:142
134491520,3ptp4l0-21swapper/209:02:432
134491520,3ptp4l0-21swapper/207:24:082
134491510,5ptp4l0-21swapper/007:58:520
134491510,4ptp4l0-21swapper/208:03:552
134491510,4ptp4l0-21swapper/007:26:440
7327995019,6cyclictest9-21ksoftirqd/011:12:340
134491500,4ptp4l0-21swapper/311:36:483
134491500,4ptp4l0-21swapper/311:30:203
134491500,4ptp4l0-21swapper/212:31:552
134491500,4ptp4l0-21swapper/110:08:581
134491500,4ptp4l0-21swapper/010:45:120
134491500,3ptp4l0-21swapper/210:35:222
134491500,3ptp4l0-21swapper/111:46:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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