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2026-08-26 - 13:56
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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 100 highest latencies:
System rackdslot1.osadl.org (updated Wed Aug 26, 2026 00:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491700,6ptp4l25-21ksoftirqd/123:00:301
2089599663,61cyclictest0-21swapper/222:55:282
134491630,4ptp4l0-21swapper/019:05:150
134491600,3ptp4l0-21swapper/022:30:190
134491590,5ptp4l0-21swapper/022:53:370
134491580,4ptp4l0-21swapper/323:06:273
2089599574,7cyclictest0-21swapper/220:10:172
2089599574,7cyclictest0-21swapper/220:10:172
134491570,3ptp4l8224-21ls19:50:220
2089599565,6cyclictest0-21swapper/200:20:162
134491560,3ptp4l0-21swapper/123:25:241
134491560,3ptp4l0-21swapper/020:35:260
2089599555,7cyclictest0-21swapper/220:40:262
2089599555,6cyclictest0-21swapper/222:50:172
20895995528,5cyclictest33-21ksoftirqd/200:10:242
134491550,4ptp4l0-21swapper/122:41:211
134491550,4ptp4l0-21swapper/121:58:391
134491550,4ptp4l0-21swapper/120:42:471
134491550,3ptp4l0-21swapper/122:25:001
134491550,3ptp4l0-21swapper/023:35:240
2089599546,6cyclictest0-21swapper/223:45:262
2089599545,6cyclictest0-21swapper/222:08:092
2089599544,6cyclictest0-21swapper/223:10:202
2089599544,6cyclictest0-21swapper/219:55:172
2089599543,6cyclictest33-21ksoftirqd/220:30:252
2089599543,6cyclictest0-21swapper/219:10:182
2089599543,6cyclictest0-21swapper/219:10:182
134491540,6ptp4l19240-21diskstats21:25:150
134491540,4ptp4l0-21swapper/323:33:543
134491540,4ptp4l0-21swapper/120:29:031
134491540,4ptp4l0-21swapper/119:42:441
134491540,4ptp4l0-21swapper/119:42:441
2089599534,6cyclictest0-21swapper/223:35:212
2089599534,6cyclictest0-21swapper/222:30:192
2089599533,6cyclictest0-21swapper/220:00:252
134491530,4ptp4l0-21swapper/121:54:471
134491530,3ptp4l0-21swapper/119:50:281
2089599525,6cyclictest0-21swapper/200:02:022
2089599525,5cyclictest0-21swapper/222:35:252
2089599524,6cyclictest0-21swapper/223:40:262
2089599524,6cyclictest0-21swapper/223:00:242
2089599524,6cyclictest0-21swapper/222:15:232
2089599524,6cyclictest0-21swapper/220:50:272
2089599524,6cyclictest0-21swapper/220:35:172
2089599524,6cyclictest0-21swapper/220:05:252
2089599524,6cyclictest0-21swapper/200:05:302
2089599523,6cyclictest0-21swapper/223:30:282
2089599523,6cyclictest0-21swapper/221:40:142
2089599522,6cyclictest33-21ksoftirqd/221:10:282
2089599521,11cyclictest0-21swapper/223:55:272
134491520,4ptp4l0-21swapper/022:20:500
134491520,3ptp4l0-21swapper/100:00:151
2089599515,6cyclictest0-21swapper/221:55:112
2089599514,6cyclictest0-21swapper/222:10:252
2089599514,6cyclictest0-21swapper/221:05:362
2089599514,6cyclictest0-21swapper/220:20:182
2089599514,6cyclictest0-21swapper/220:15:172
2089599514,6cyclictest0-21swapper/219:30:282
2089599514,6cyclictest0-21swapper/200:35:272
2089599513,6cyclictest321ktimersoftd/223:10:002
2089599513,6cyclictest0-21swapper/221:25:282
2089599513,6cyclictest0-21swapper/221:00:142
2089599513,11cyclictest0-21swapper/221:15:262
134491510,9ptp4l2716-21apt-get22:00:142
134491510,4ptp4l0-21swapper/322:55:303
134491510,4ptp4l0-21swapper/120:55:301
134491510,4ptp4l0-21swapper/120:04:331
134491510,4ptp4l0-21swapper/020:59:280
134491510,3ptp4l0-21swapper/120:30:251
2089599507,3cyclictest9091-21cat23:20:222
2089599505,6cyclictest0-21swapper/220:25:362
2089599505,6cyclictest0-21swapper/219:28:022
2089599504,6cyclictest0-21swapper/222:26:432
2089599503,6cyclictest33-21ksoftirqd/223:20:002
2089599502,7cyclictest33-21ksoftirqd/221:20:212
2089599502,7cyclictest0-21swapper/220:55:272
2089599501,6cyclictest0-21swapper/222:45:232
134491500,4ptp4l0-21swapper/321:16:123
134491500,4ptp4l0-21swapper/021:20:060
134491500,4ptp4l0-21swapper/020:50:140
134491500,10ptp4l0-21swapper/022:55:050
2089599493,6cyclictest0-21swapper/219:15:272
2089599492,6cyclictest0-21swapper/220:45:172
2089599492,6cyclictest0-21swapper/220:45:172
2089599491,4cyclictest0-21swapper/200:15:162
134491490,4ptp4l0-21swapper/322:50:513
134491490,4ptp4l0-21swapper/023:46:470
134491490,4ptp4l0-21swapper/021:34:030
134491490,3ptp4l0-21swapper/123:36:091
2089599487,7cyclictest0-21swapper/221:35:232
2089599482,7cyclictest0-21swapper/222:20:142
134491480,4ptp4l0-21swapper/022:15:170
134491480,4ptp4l0-21swapper/019:43:430
134491480,4ptp4l0-21swapper/019:43:430
134491480,4ptp4l0-21swapper/000:34:090
134491480,3ptp4l0-21swapper/000:00:180
134491480,22ptp4l25-21ksoftirqd/120:35:401
2089599473,11cyclictest0-21swapper/221:50:252
2089599472,7cyclictest0-21swapper/221:30:292
2089599472,7cyclictest0-21swapper/219:20:562
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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