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2026-05-09 - 01:21
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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 Fri May 08, 2026 12:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26632880,4sleep00-21swapper/011:20:170
1532099738,62cyclictest0-21swapper/212:15:302
1532099738,62cyclictest0-21swapper/212:15:292
15320996233,9cyclictest33-21ksoftirqd/208:10:232
15320996123,5cyclictest33-21ksoftirqd/209:00:132
134491610,4ptp4l0-21swapper/110:50:151
134491610,17ptp4l0-21swapper/112:15:141
134491610,17ptp4l0-21swapper/112:15:141
212212600,6sleep21532099cyclictest08:30:172
15320996028,5cyclictest33-21ksoftirqd/210:57:372
15320996023,9cyclictest33-21ksoftirqd/207:10:142
146812600,5sleep30-21swapper/309:25:183
146812600,5sleep30-21swapper/309:25:183
134491600,4ptp4l19508-21ntp_states09:35:221
134491600,4ptp4l0-21swapper/010:25:180
134491590,5ptp4l0-21swapper/309:32:443
134491590,4ptp4l0-21swapper/012:11:460
134491590,3ptp4l0-21swapper/112:10:101
134491580,4ptp4l31434-21latency_hist07:44:590
1532099576,8cyclictest33-21ksoftirqd/210:45:142
134491570,5ptp4l0-21swapper/012:18:150
134491570,5ptp4l0-21swapper/012:18:140
134491570,4ptp4l0-21swapper/210:01:232
134491570,4ptp4l0-21swapper/107:05:041
134491570,3ptp4l0-21swapper/210:35:332
134491570,3ptp4l0-21swapper/207:18:022
134491570,3ptp4l0-21swapper/112:25:021
134491570,3ptp4l0-21swapper/108:00:171
134491570,3ptp4l0-21swapper/012:00:150
134491560,4ptp4l0-21swapper/209:48:182
134491560,3ptp4l0-21swapper/310:10:273
134491560,3ptp4l0-21swapper/011:47:420
1532099554,8cyclictest121rcu_preempt12:35:252
15320995523,5cyclictest33-21ksoftirqd/209:10:152
1532099550,13cyclictest33-21ksoftirqd/207:35:192
134491550,3ptp4l0-21swapper/011:11:080
134491550,3ptp4l0-21swapper/009:15:390
134491550,3ptp4l0-21swapper/008:45:130
1532099546,9cyclictest33-21ksoftirqd/208:50:182
1532099545,8cyclictest33-21ksoftirqd/209:35:132
1532099543,6cyclictest33-21ksoftirqd/210:25:002
1532099542,6cyclictest33-21ksoftirqd/209:55:232
1532099542,33cyclictest0-21swapper/211:52:172
1532099542,33cyclictest0-21swapper/209:16:272
1532099542,30cyclictest0-21swapper/212:04:082
1532099542,30cyclictest0-21swapper/208:55:282
1532099534,7cyclictest33-21ksoftirqd/209:30:262
1532099533,6cyclictest33-21ksoftirqd/210:10:252
15320995325,5cyclictest33-21ksoftirqd/212:20:012
134491530,4ptp4l0-21swapper/107:26:211
1532099525,10cyclictest33-21ksoftirqd/212:30:212
1532099524,8cyclictest33-21ksoftirqd/210:40:182
1532099522,6cyclictest33-21ksoftirqd/210:30:172
1532099522,30cyclictest0-21swapper/208:37:062
1532099520,6cyclictest33-21ksoftirqd/207:20:152
1532099520,5cyclictest0-21swapper/208:05:132
134491520,4ptp4l0-21swapper/110:59:181
134491520,4ptp4l0-21swapper/108:31:361
134491520,3ptp4l0-21swapper/010:55:180
1532099515,8cyclictest33-21ksoftirqd/211:30:252
1532099514,9cyclictest121rcu_preempt07:30:232
1532099514,10cyclictest33-21ksoftirqd/211:00:172
1532099513,7cyclictest0-21swapper/207:50:212
1532099513,5cyclictest33-21ksoftirqd/211:35:142
1532099512,7cyclictest33-21ksoftirqd/211:20:132
1532099512,6cyclictest33-21ksoftirqd/208:00:012
1532099512,30cyclictest0-21swapper/212:07:052
1532099511,8cyclictest0-21swapper/209:40:222
1532099510,7cyclictest0-21swapper/209:50:222
1532099510,6cyclictest33-21ksoftirqd/208:00:172
1532099510,6cyclictest0-21swapper/207:46:452
134491510,4ptp4l13390-21/usr/sbin/munin08:15:192
134491510,4ptp4l0-21swapper/308:30:143
134491510,4ptp4l0-21swapper/308:08:223
134491510,4ptp4l0-21swapper/109:30:171
134491510,4ptp4l0-21swapper/109:17:041
134491510,4ptp4l0-21swapper/108:41:211
134491510,4ptp4l0-21swapper/011:09:420
134491510,3ptp4l2003-21df07:50:111
134491510,3ptp4l0-21swapper/309:43:143
134491510,3ptp4l0-21swapper/011:51:150
134491510,13ptp4l0-21swapper/009:05:090
134491510,10ptp4l0-21swapper/008:21:500
1532099504,7cyclictest33-21ksoftirqd/209:05:182
1532099504,5cyclictest33-21ksoftirqd/211:40:142
1532099504,5cyclictest33-21ksoftirqd/208:25:132
1532099504,5cyclictest33-21ksoftirqd/207:25:192
1532099503,7cyclictest0-21swapper/209:22:292
1532099502,7cyclictest0-21swapper/211:10:222
1532099502,6cyclictest33-21ksoftirqd/212:25:232
1532099502,6cyclictest0-21swapper/212:10:232
1532099502,45cyclictest0-21swapper/208:45:182
134491500,4ptp4l0-21swapper/309:57:053
134491500,4ptp4l0-21swapper/111:43:441
134491500,3ptp4l0-21swapper/308:50:243
134491500,3ptp4l0-21swapper/012:25:320
134491500,3ptp4l0-21swapper/008:52:590
1532099495,8cyclictest33-21ksoftirqd/211:55:152
1532099495,7cyclictest33-21ksoftirqd/207:40:252
1532099493,5cyclictest33-21ksoftirqd/211:30:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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