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2026-03-19 - 13:53
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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 Thu Mar 19, 2026 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
257952850,4sleep025798-21irqrtprio23:20:180
592699707,17cyclictest19668-21ntpq00:15:211
134491680,4ptp4l18674-21meminfo20:45:192
134491660,2ptp4l121rcu_preempt23:42:353
134491650,4ptp4l27271-21apt-get22:15:102
134491650,4ptp4l27271-21apt-get22:15:102
134491650,30ptp4l25-21ksoftirqd/119:05:221
71222640,4sleep30-21swapper/319:10:213
592699649,14cyclictest11944-21if_enp4s000:00:181
592599640,24cyclictest15089-21chrt00:05:220
592699619,15cyclictest15020-21chrt20:38:201
134491610,3ptp4l0-21swapper/222:41:462
592699609,15cyclictest5991-21timerandwakeup23:45:261
134491590,4ptp4l0-21swapper/323:53:423
134491590,4ptp4l0-21swapper/321:44:213
592599582,19cyclictest0-21swapper/021:20:120
134491580,4ptp4l0-21swapper/322:00:293
134491580,4ptp4l0-21swapper/222:13:152
134491580,3ptp4l0-21swapper/320:17:093
592599572,23cyclictest0-21swapper/019:14:000
134491570,5ptp4l0-21swapper/319:57:453
134491570,4ptp4l0-21swapper/321:57:273
134491570,4ptp4l0-21swapper/319:35:283
134491570,4ptp4l0-21swapper/319:35:283
134491570,4ptp4l0-21swapper/300:27:223
134491570,3ptp4l0-21swapper/223:43:202
134491570,15ptp4l0-21swapper/321:05:173
134491570,15ptp4l0-21swapper/321:05:173
134491560,4ptp4l0-21swapper/321:36:383
134491560,4ptp4l0-21swapper/220:21:522
134491560,4ptp4l0-21swapper/219:55:162
134491560,3ptp4l0-21swapper/221:58:222
134491560,3ptp4l0-21swapper/119:49:111
592599556,19cyclictest1317-21runrttasks23:42:370
134491550,5ptp4l0-21swapper/322:38:563
134491550,4ptp4l0-21swapper/322:13:583
134491550,4ptp4l0-21swapper/320:04:263
134491550,4ptp4l0-21swapper/222:23:582
134491550,3ptp4l0-21swapper/319:30:193
592599540,23cyclictest10285-21sed22:45:270
134491540,7ptp4l41-21ksoftirqd/319:25:193
134491540,4ptp4l0-21swapper/321:32:093
134491540,4ptp4l0-21swapper/221:13:402
134491540,3ptp4l0-21swapper/322:15:173
134491540,3ptp4l0-21swapper/322:15:173
134491540,3ptp4l0-21swapper/300:09:453
134491540,3ptp4l0-21swapper/223:36:212
134491540,3ptp4l0-21swapper/219:22:552
592699531,50cyclictest4929-21kworker/1:122:36:091
134491530,4ptp4l0-21swapper/320:47:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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