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2026-04-17 - 05:59
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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 Fri Apr 17, 2026 00:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
786421720,2sleep2265699cyclictest19:20:172
134491740,5ptp4l0-21swapper/219:07:402
134491640,4ptp4l0-21swapper/221:30:132
134491640,10ptp4l241ktimersoftd/119:26:241
265599613,22cyclictest134491ptp4l19:20:191
134491600,3ptp4l0-21swapper/122:29:111
249182590,6sleep1265599cyclictest23:25:141
134491580,4ptp4l0-21swapper/323:41:393
134491570,4ptp4l0-21swapper/323:56:403
134491570,3ptp4l0-21swapper/200:05:072
134491560,4ptp4l0-21swapper/200:12:172
134491560,2ptp4l0-21swapper/019:45:190
265499555,8cyclictest24513-21df_abs22:15:150
134491550,5ptp4l0-21swapper/223:55:152
134491550,4ptp4l0-21swapper/323:27:123
134491550,4ptp4l0-21swapper/319:40:143
134491550,3ptp4l0-21swapper/300:09:373
134491550,3ptp4l0-21swapper/123:07:051
134491550,3ptp4l0-21swapper/120:36:421
134491550,3ptp4l0-21swapper/000:37:560
134491550,15ptp4l32204-21apt-get19:05:013
265499545,7cyclictest0-21swapper/020:50:250
265499544,7cyclictest9-21ksoftirqd/000:00:250
2654995428,5cyclictest9-21ksoftirqd/021:37:380
134491540,4ptp4l0-21swapper/321:34:093
134491540,3ptp4l0-21swapper/200:37:352
265499533,11cyclictest9-21ksoftirqd/020:30:250
265499532,5cyclictest9-21ksoftirqd/021:15:130
134491530,4ptp4l0-21swapper/322:47:053
134491530,4ptp4l0-21swapper/020:55:070
134491530,3ptp4l0-21swapper/200:20:092
134491530,2ptp4l0-21swapper/223:15:282
265499525,7cyclictest9-21ksoftirqd/000:10:270
2654995249,2cyclictest111rcuc/022:35:200
265499520,7cyclictest9-21ksoftirqd/000:00:000
134491520,4ptp4l0-21swapper/323:36:283
134491520,4ptp4l0-21swapper/322:44:443
265499514,9cyclictest0-21swapper/021:00:000
2654995127,4cyclictest9-21ksoftirqd/023:20:400
265499512,6cyclictest9-21ksoftirqd/021:53:240
265499512,6cyclictest9-21ksoftirqd/021:40:260
265499512,5cyclictest9-21ksoftirqd/022:55:020
265499512,5cyclictest7093-21awk19:20:010
265499512,5cyclictest0-21swapper/020:40:150
265499510,6cyclictest9-21ksoftirqd/000:15:260
134491510,9ptp4l0-21swapper/219:31:342
134491510,4ptp4l0-21swapper/319:34:443
134491510,4ptp4l0-21swapper/121:15:171
134491510,4ptp4l0-21swapper/023:48:240
265499507,3cyclictest121rcu_preempt20:45:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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