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2026-03-23 - 15:48
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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 Mon Mar 23, 2026 12:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16720996535,9cyclictest33-21ksoftirqd/211:50:152
134491610,3ptp4l0-21swapper/309:55:183
134491610,3ptp4l0-21swapper/011:45:150
134491610,20ptp4l0-21swapper/108:02:131
134491600,4ptp4l0-21swapper/208:05:202
134491590,3ptp4l1301-21snmpd10:23:123
134491580,4ptp4l0-21swapper/209:05:272
134491580,4ptp4l0-21swapper/109:55:281
134491580,3ptp4l0-21swapper/109:15:301
134491580,17ptp4l0-21swapper/109:10:261
134491570,4ptp4l0-21swapper/311:51:483
1672099566,5cyclictest33-21ksoftirqd/212:25:152
16720995627,4cyclictest33-21ksoftirqd/209:40:252
134491560,5ptp4l0-21swapper/112:20:111
1672099554,7cyclictest0-21swapper/211:30:222
1672099554,7cyclictest0-21swapper/208:50:262
1672099554,7cyclictest0-21swapper/208:00:262
1672099554,6cyclictest0-21swapper/207:50:242
215282540,2sleep3391rcuc/307:20:123
1672099543,9cyclictest0-21swapper/209:28:012
1672099543,7cyclictest0-21swapper/212:05:222
1672099543,7cyclictest0-21swapper/212:05:212
1672099534,7cyclictest0-21swapper/210:48:272
1672099534,7cyclictest0-21swapper/207:25:152
1672099534,6cyclictest0-21swapper/210:05:012
1672099534,6cyclictest0-21swapper/208:10:212
1672099533,6cyclictest0-21swapper/210:10:162
1672099533,6cyclictest0-21swapper/207:30:262
134491530,3ptp4l0-21swapper/009:18:400
134491530,10ptp4l0-21swapper/010:25:180
1672099525,5cyclictest0-21swapper/209:45:112
1672099524,6cyclictest0-21swapper/207:15:172
1672099522,6cyclictest33-21ksoftirqd/211:59:592
1672099521,5cyclictest0-21swapper/208:40:162
134491520,4ptp4l0-21swapper/310:30:203
134491520,4ptp4l0-21swapper/307:55:163
134491520,4ptp4l0-21swapper/009:35:290
1672099517,6cyclictest0-21swapper/210:43:132
1672099515,5cyclictest0-21swapper/207:45:222
1672099514,6cyclictest0-21swapper/209:32:532
1672099514,11cyclictest0-21swapper/211:10:262
1672099513,6cyclictest0-21swapper/207:37:352
1672099512,6cyclictest0-21swapper/211:00:252
1672099512,14cyclictest0-21swapper/208:22:502
134491510,4ptp4l0-21swapper/008:20:170
1672099505,11cyclictest0-21swapper/212:00:242
1672099504,6cyclictest0-21swapper/211:05:182
1672099504,11cyclictest0-21swapper/207:20:232
1672099503,6cyclictest33-21ksoftirqd/209:15:292
1672099502,7cyclictest0-21swapper/207:55:172
134491500,9ptp4l15140-21memory07:05:212
134491500,4ptp4l0-21swapper/108:19:001
134491500,11ptp4l14174-21/usr/sbin/munin07:05:263
1672099496,6cyclictest0-21swapper/210:51:282
1672099495,6cyclictest0-21swapper/209:35:162
1672099494,5cyclictest0-21swapper/209:50:282
1672099494,12cyclictest0-21swapper/210:15:272
1672099493,10cyclictest0-21swapper/210:00:232
1672099492,6cyclictest0-21swapper/211:28:592
1672099492,6cyclictest0-21swapper/208:16:582
1672099491,6cyclictest33-21ksoftirqd/210:40:012
134491490,4ptp4l0-21swapper/307:51:293
134491490,3ptp4l0-21swapper/012:25:520
1672099487,5cyclictest0-21swapper/211:18:112
1672099485,5cyclictest0-21swapper/211:43:112
1672099485,10cyclictest0-21swapper/209:55:162
1672099483,6cyclictest33-21ksoftirqd/212:20:262
1672099482,6cyclictest33-21ksoftirqd/212:35:262
1672099482,6cyclictest33-21ksoftirqd/212:35:262
134491480,4ptp4l0-21swapper/110:57:011
134491480,4ptp4l0-21swapper/009:25:090
134491480,3ptp4l0-21swapper/012:09:090
134491480,3ptp4l0-21swapper/012:09:080
1672099476,5cyclictest0-21swapper/209:21:212
1672099475,7cyclictest0-21swapper/212:14:162
1672099475,6cyclictest33-21ksoftirqd/208:45:252
1672099474,6cyclictest0-21swapper/211:37:052
1672099474,6cyclictest0-21swapper/209:02:362
1672099474,11cyclictest0-21swapper/207:40:232
1672099473,6cyclictest0-21swapper/210:30:172
1672099472,39cyclictest0-21swapper/208:29:432
134491470,7ptp4l0-21swapper/108:10:271
134491470,15ptp4l1317-21runrttasks07:34:271
134491470,12ptp4l0-21swapper/210:25:162
1672099465,5cyclictest0-21swapper/209:12:552
1672099464,6cyclictest33-21ksoftirqd/211:00:002
134491460,4ptp4l0-21swapper/110:01:581
134491460,3ptp4l0-21swapper/312:10:203
134491460,3ptp4l0-21swapper/311:20:173
134491460,3ptp4l0-21swapper/311:00:193
134491460,3ptp4l0-21swapper/112:36:271
134491460,3ptp4l0-21swapper/112:36:271
134491460,3ptp4l0-21swapper/111:34:211
134491460,3ptp4l0-21swapper/109:23:591
134491460,3ptp4l0-21swapper/011:30:390
1672099455,6cyclictest0-21swapper/212:19:252
1672099454,6cyclictest0-21swapper/211:21:482
1672099450,5cyclictest33-21ksoftirqd/212:30:282
134491450,3ptp4l0-21swapper/109:40:361
134491450,3ptp4l0-21swapper/108:52:391
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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