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2026-04-11 - 04:47
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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 100 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
17937995410,17cyclictest0-21swapper/020:38:310
134491540,4ptp4l0-21swapper/220:17:162
134491540,4ptp4l0-21swapper/219:11:002
1794099535,6cyclictest0-21swapper/322:10:153
1794099535,10cyclictest0-21swapper/320:02:413
1794099534,6cyclictest0-21swapper/319:45:193
1794099534,13cyclictest0-21swapper/321:30:163
1793899537,11cyclictest0-21swapper/100:25:271
1793799536,16cyclictest0-21swapper/022:59:240
17937995314,8cyclictest19257-21ntp_states20:20:230
1794099524,6cyclictest0-21swapper/320:05:113
1794099524,6cyclictest0-21swapper/320:05:113
1794099523,6cyclictest5250-21cat00:30:113
1794099522,6cyclictest0-21swapper/322:50:103
1793799528,10cyclictest0-21swapper/022:05:000
17937995211,16cyclictest1865-21taskset23:11:080
134491520,4ptp4l0-21swapper/222:52:492
1794099514,11cyclictest0-21swapper/300:15:203
1793899518,7cyclictest0-21swapper/122:50:191
134491510,3ptp4l0-21swapper/221:27:362
134491510,11ptp4l0-21swapper/319:05:143
1794099502,6cyclictest0-21swapper/320:52:393
1793899507,6cyclictest0-21swapper/121:15:171
1793899507,6cyclictest0-21swapper/119:25:191
1793899506,5cyclictest0-21swapper/120:55:221
1793899505,7cyclictest0-21swapper/123:40:261
1793899505,16cyclictest3704-21chrt19:45:361
1793799500,10cyclictest0-21swapper/019:10:240
134491500,4ptp4l0-21swapper/322:28:143
134491500,3ptp4l0-21swapper/221:21:502
1794099495,6cyclictest0-21swapper/321:20:253
17940994932,5cyclictest41-21ksoftirqd/323:00:003
1794099492,7cyclictest0-21swapper/319:15:273
1794099492,10cyclictest0-21swapper/300:10:243
1793899496,6cyclictest0-21swapper/123:05:131
1793899496,6cyclictest0-21swapper/119:20:121
1793899495,7cyclictest0-21swapper/123:20:191
1793899494,11cyclictest2306-21chrt00:21:521
1793899494,11cyclictest2306-21chrt00:21:521
1793899493,6cyclictest0-21swapper/121:25:151
1793899492,10cyclictest1317-21runrttasks23:29:531
1793799498,39cyclictest0-21swapper/021:35:140
17937994912,34cyclictest6989-21/usr/sbin/munin21:05:150
134491490,4ptp4l0-21swapper/222:07:402
134491490,4ptp4l0-21swapper/220:56:132
134491490,4ptp4l0-21swapper/220:41:282
134491490,4ptp4l0-21swapper/219:20:312
134491490,4ptp4l0-21swapper/200:34:492
134491490,3ptp4l0-21swapper/219:16:092
1794099484,10cyclictest0-21swapper/320:15:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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