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2026-04-19 - 15:56
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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 rackdslot0.osadl.org (updated Sun Apr 19, 2026 12:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2322992323,0cyclictest0-21swapper/208:00:012
232299230,18cyclictest0-21swapper/210:25:192
231399234,18cyclictest0-21swapper/008:45:000
2322992222,0cyclictest0-21swapper/209:00:152
232299220,8cyclictest843-21systemd-network12:30:222
231799220,21cyclictest843-21systemd-network07:31:001
2322992118,2cyclictest16061-21dump-pmu-power08:30:012
2322991917,1cyclictest9612-21timerandwakeup08:15:212
2322991917,1cyclictest9612-21timerandwakeup08:15:202
2322991917,1cyclictest6075-21latency08:10:172
2322991917,1cyclictest0-21swapper/208:20:162
2322991916,2cyclictest0-21swapper/210:50:162
2322991916,1cyclictest0-21swapper/207:15:182
2322991915,3cyclictest0-21swapper/211:01:582
232299191,17cyclictest0-21swapper/208:05:172
232299190,3cyclictest0-21swapper/211:35:192
232299190,18cyclictest0-21swapper/209:35:012
231799193,2cyclictest9453-21perf11:10:011
231799192,1cyclictest0-21swapper/111:32:131
2317991912,3cyclictest0-21swapper/112:06:591
231799190,16cyclictest3983-21H222:10:211
231399193,1cyclictest22186-21timerandwakeup09:35:210
231399192,2cyclictest30807-21grep10:50:130
231399190,2cyclictest3987-21H222:10:210
232299182,15cyclictest20006-21if_enp1s008:35:162
2322991818,0cyclictest20083-21mii-tool10:30:162
2322991816,1cyclictest0-21swapper/211:15:142
2322991816,1cyclictest0-21swapper/209:55:162
2322991816,1cyclictest0-21swapper/208:45:332
2322991816,1cyclictest0-21swapper/207:40:142
2322991815,2cyclictest19399-21latency_hist12:25:002
2322991815,2cyclictest17690-21nfsd408:30:192
2322991814,3cyclictest23128-21basename11:35:012
2322991814,3cyclictest0-21swapper/212:07:012
2322991814,3cyclictest0-21swapper/211:20:162
2322991814,3cyclictest0-21swapper/208:02:162
232299181,16cyclictest0-21swapper/212:02:192
232299180,2cyclictest3991-21H222:10:212
232299180,17cyclictest3720-21tr10:00:152
232299180,17cyclictest15266-21cstates09:25:152
232299180,17cyclictest0-21swapper/207:10:122
232299180,15cyclictest3976-21H222:10:212
231799183,1cyclictest0-21swapper/110:30:251
2317991816,1cyclictest0-21swapper/107:15:141
2317991813,4cyclictest0-21swapper/110:09:031
2317991812,4cyclictest0-21swapper/108:07:281
231799180,3cyclictest14903-21dump-pmu-power11:20:001
231799180,2cyclictest3979-21H222:10:211
231799180,17cyclictest3979-21H222:10:211
231799180,15cyclictest3991-21H222:10:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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