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2026-04-11 - 13:26
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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 Sat Apr 11, 2026 00:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1794099630,61cyclictest0-21swapper/321:00:483
1793799638,51cyclictest5359-21awk21:00:220
17937996314,11cyclictest15395-21seq20:12:540
17937996216,9cyclictest7941-21python19:55:240
17937996115,10cyclictest25009-21taskset00:01:510
1793799606,17cyclictest0-21swapper/000:30:150
134491600,3ptp4l0-21swapper/219:55:182
265732590,6sleep21793999cyclictest00:05:202
1793899597,6cyclictest0-21swapper/121:10:241
134491580,4ptp4l0-21swapper/221:10:162
134491580,4ptp4l0-21swapper/023:50:210
1793899577,6cyclictest0-21swapper/122:20:161
1793899575,17cyclictest6152-21chrt19:52:301
1793899574,15cyclictest22394-21chrt21:37:091
1793899573,16cyclictest8527-21chrt19:58:321
17937995710,17cyclictest0-21swapper/023:59:250
17937995710,17cyclictest0-21swapper/023:30:040
134491570,4ptp4l0-21swapper/323:59:203
134491570,4ptp4l0-21swapper/222:20:332
1794099568,6cyclictest0-21swapper/319:35:293
1794099565,6cyclictest0-21swapper/321:15:263
1793899567,7cyclictest0-21swapper/121:30:191
17937995610,18cyclictest0-21swapper/020:53:350
134491560,4ptp4l1317-21runrttasks20:35:082
134491560,4ptp4l0-21swapper/220:33:582
134491560,3ptp4l0-21swapper/221:40:242
134491560,21ptp4l0-21swapper/219:30:292
134491560,21ptp4l0-21swapper/219:30:292
134491560,13ptp4l0-21swapper/222:55:152
1794099556,6cyclictest0-21swapper/319:20:243
1794099555,6cyclictest0-21swapper/323:20:173
1793899558,5cyclictest0-21swapper/120:50:231
17937995515,16cyclictest25745-21seq21:45:170
17937995513,9cyclictest28646-21/usr/sbin/munin21:50:220
17937995511,18cyclictest0-21swapper/019:27:500
17937995510,17cyclictest0-21swapper/020:49:580
17937995510,17cyclictest0-21swapper/019:32:030
17937995510,17cyclictest0-21swapper/019:32:030
17937995510,16cyclictest0-21swapper/023:04:160
134491550,4ptp4l0-21swapper/223:34:152
134491550,3ptp4l0-21swapper/223:22:532
134491550,3ptp4l0-21swapper/220:10:232
134491550,3ptp4l0-21swapper/219:45:272
134491550,13ptp4l16716-21ntp_states19:05:211
134491550,12ptp4l0-21swapper/220:50:142
134491550,11ptp4l0-21swapper/221:05:212
1794099545,6cyclictest0-21swapper/322:40:253
1794099545,6cyclictest0-21swapper/321:45:233
1794099544,5cyclictest0-21swapper/322:15:253
17937995410,17cyclictest0-21swapper/022:47:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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