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2026-04-04 - 21:29
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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 04, 2026 12:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1113899670,25cyclictest18657-21egrep09:45:111
1113899666,19cyclictest12335-21irqrtprio09:30:181
238412650,5sleep11113899cyclictest12:10:241
238412650,5sleep11113899cyclictest12:10:231
1113899650,26cyclictest22900-21cat08:45:131
1113899650,26cyclictest22900-21cat08:45:121
1113899650,23cyclictest9926-21date10:35:011
134491640,4ptp4l0-21swapper/311:25:283
11139996336,3cyclictest33-21ksoftirqd/211:50:152
11139996327,6cyclictest33-21ksoftirqd/208:03:222
1113899630,25cyclictest12665-21uptime11:45:271
11139996227,6cyclictest33-21ksoftirqd/208:33:502
11139996225,6cyclictest33-21ksoftirqd/208:14:012
11139996225,6cyclictest33-21ksoftirqd/208:14:012
11139996225,6cyclictest33-21ksoftirqd/207:50:232
1113899622,20cyclictest0-21swapper/110:25:181
1113899621,28cyclictest26578-21taskset12:16:321
1113899620,28cyclictest8943-21chrt09:22:321
1113899620,28cyclictest17941-21chrt08:34:411
1113899620,24cyclictest28433-21mailstats12:20:241
1113899612,25cyclictest0-21swapper/112:05:211
11139996028,7cyclictest33-21ksoftirqd/207:45:162
11139996027,4cyclictest33-21ksoftirqd/210:12:262
11139996026,5cyclictest33-21ksoftirqd/211:45:252
11139996025,3cyclictest33-21ksoftirqd/209:55:002
1113899600,30cyclictest29905-21taskset10:07:481
1113899600,30cyclictest29117-21seq07:47:231
1113899600,27cyclictest31496-21chrt12:29:411
11139995932,3cyclictest33-21ksoftirqd/211:22:102
11139995928,4cyclictest33-21ksoftirqd/211:11:172
11139995927,6cyclictest33-21ksoftirqd/209:35:232
11139995927,4cyclictest33-21ksoftirqd/207:30:002
1113899590,29cyclictest27706-21seq10:04:061
1113899590,29cyclictest27706-21seq10:04:061
1113899590,29cyclictest10712-21chrt08:15:431
134491580,4ptp4l0-21swapper/107:12:431
134491580,4ptp4l0-21swapper/012:12:170
134491580,4ptp4l0-21swapper/012:12:160
134491580,3ptp4l1301-21snmpd11:48:193
11139995830,4cyclictest33-21ksoftirqd/210:26:442
11139995828,17cyclictest33-21ksoftirqd/210:55:152
11139995827,4cyclictest33-21ksoftirqd/207:19:032
11139995825,4cyclictest33-21ksoftirqd/211:30:132
11139995825,4cyclictest33-21ksoftirqd/208:45:092
11139995825,4cyclictest33-21ksoftirqd/208:45:092
11139995824,6cyclictest33-21ksoftirqd/209:00:232
11139995823,3cyclictest33-21ksoftirqd/209:44:392
1113899581,30cyclictest862-21seq11:22:581
1113899581,29cyclictest3509-21taskset12:36:371
1113899581,29cyclictest15110-21seq11:52:021
1113899580,30cyclictest28676-21taskset11:13:381
1113899580,30cyclictest24639-21seq07:39:081
1113899580,30cyclictest20134-21seq08:38:211
1113899580,29cyclictest19839-21seq07:26:281
1113899580,28cyclictest1284-21seq07:56:381
134491570,4ptp4l0-21swapper/310:06:303
134491570,4ptp4l0-21swapper/107:20:221
134491570,4ptp4l0-21swapper/107:20:221
11139995730,6cyclictest33-21ksoftirqd/207:55:522
11139995729,6cyclictest33-21ksoftirqd/211:38:322
11139995725,7cyclictest33-21ksoftirqd/211:55:202
11139995725,6cyclictest33-21ksoftirqd/209:55:272
11139995725,4cyclictest33-21ksoftirqd/211:15:132
11139995725,4cyclictest33-21ksoftirqd/210:51:492
11139995725,4cyclictest33-21ksoftirqd/208:40:192
11139995724,4cyclictest33-21ksoftirqd/211:03:542
11139995720,6cyclictest33-21ksoftirqd/208:30:002
1113899571,19cyclictest23410-21df09:55:131
1113899570,54cyclictest16407-21cut11:55:181
1113899570,29cyclictest6019-21seq08:07:131
1113899570,29cyclictest19951-21seq12:04:571
1113899570,29cyclictest18057-21seq09:41:111
1113899570,28cyclictest3608-21taskset08:00:421
1113899570,28cyclictest13219-21taskset08:23:011
1113899570,27cyclictest5570-21chrt11:30:361
134491560,4ptp4l0-21swapper/310:33:133
11139995628,7cyclictest33-21ksoftirqd/212:18:232
11139995627,7cyclictest33-21ksoftirqd/210:16:272
11139995627,6cyclictest33-21ksoftirqd/210:10:002
11139995627,4cyclictest33-21ksoftirqd/208:38:302
11139995626,6cyclictest33-21ksoftirqd/212:40:002
11139995626,3cyclictest33-21ksoftirqd/212:33:542
11139995625,6cyclictest33-21ksoftirqd/208:53:122
11139995624,9cyclictest33-21ksoftirqd/212:21:442
11139995624,4cyclictest33-21ksoftirqd/210:00:302
11139995624,4cyclictest33-21ksoftirqd/210:00:302
1113899560,30cyclictest32637-21seq10:14:581
1113899560,30cyclictest26298-21taskset11:07:321
1113899560,29cyclictest31833-21seq09:02:091
1113899560,29cyclictest1222-21taskset12:32:481
1113899560,28cyclictest19068-21seq10:51:111
1113899560,26cyclictest24003-21taskset11:02:331
134491550,4ptp4l0-21swapper/311:40:333
134491550,4ptp4l0-21swapper/311:40:333
11139995530,6cyclictest33-21ksoftirqd/208:16:372
11139995526,4cyclictest33-21ksoftirqd/210:36:582
11139995525,3cyclictest33-21ksoftirqd/211:44:562
11139995525,3cyclictest33-21ksoftirqd/211:44:562
11139995524,7cyclictest33-21ksoftirqd/209:46:522
11139995523,4cyclictest33-21ksoftirqd/207:20:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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