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2026-04-24 - 15:28
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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 Apr 24, 2026 12:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2657699740,36cyclictest29694-21seq11:54:501
2657699652,61cyclictest6068-21kworker/1:008:21:091
134491640,5ptp4l32129-21gpgv12:00:003
284592630,4sleep20-21swapper/208:20:262
2657699630,28cyclictest4231-21chrt12:06:391
2657699620,25cyclictest12480-21mailstats10:05:241
134491620,3ptp4l27367-21fschecks_time08:20:143
134491610,3ptp4l0-21swapper/309:43:113
134491610,15ptp4l7859-21ls09:55:250
2657699600,3cyclictest7214-21sed09:55:171
2657699600,29cyclictest865-21seq08:30:511
134491600,20ptp4l0-21swapper/311:15:253
2657699592,18cyclictest0-21swapper/109:35:271
2657699591,29cyclictest22102-21chrt08:09:491
134491590,4ptp4l0-21swapper/311:50:373
134491590,4ptp4l0-21swapper/010:00:250
2657699580,29cyclictest31866-21taskset11:58:161
2657699580,26cyclictest28406-21taskset07:11:591
134491580,4ptp4l0-21swapper/107:40:261
134491580,3ptp4l4594-21df11:00:130
2657699572,19cyclictest134691getstats10:40:521
2657699571,26cyclictest7980-21chrt08:47:201
134491570,4ptp4l0-21swapper/211:23:592
134491570,4ptp4l0-21swapper/209:29:152
134491570,4ptp4l0-21swapper/209:23:322
134491570,4ptp4l0-21swapper/112:15:151
134491570,3ptp4l0-21swapper/010:05:230
2657699561,2cyclictest17440-21users10:15:261
2657699561,2cyclictest137891phc2sys10:10:131
2657699560,2cyclictest18201-21if_enp1s009:10:161
2657699560,27cyclictest11043-21taskset11:14:321
134491560,4ptp4l0-21swapper/210:13:232
134491560,4ptp4l0-21swapper/208:31:102
134491560,4ptp4l0-21swapper/208:03:512
2657699550,29cyclictest26337-21seq09:25:511
2657699550,29cyclictest13645-21taskset12:28:071
2657699550,27cyclictest807-21seq07:24:391
134491550,4ptp4l0-21swapper/309:11:293
134491550,4ptp4l0-21swapper/208:46:112
134491550,3ptp4l0-21swapper/209:52:142
134491550,3ptp4l0-21swapper/208:19:102
134491550,3ptp4l0-21swapper/208:19:102
134491550,3ptp4l0-21swapper/107:05:081
2657699540,28cyclictest31407-21chrt10:46:581
134491540,4ptp4l0-21swapper/311:34:323
134491540,4ptp4l0-21swapper/311:34:323
134491540,4ptp4l0-21swapper/310:15:553
134491540,4ptp4l0-21swapper/211:48:372
134491540,4ptp4l0-21swapper/211:06:222
134491540,4ptp4l0-21swapper/207:55:272
134491540,4ptp4l0-21swapper/207:40:052
134491540,3ptp4l9302-21kernelversion08:50:162
134491540,2ptp4l3285-21ssh10:55:253
134491530,4ptp4l0-21swapper/212:05:022
134491530,4ptp4l0-21swapper/209:58:032
134491530,4ptp4l0-21swapper/207:51:272
26577995222,4cyclictest33-21ksoftirqd/210:38:382
2657699520,29cyclictest19945-21taskset10:22:361
134491520,4ptp4l0-21swapper/210:06:552
134491520,4ptp4l0-21swapper/208:12:022
134491520,4ptp4l0-21swapper/207:23:472
134491520,4ptp4l0-21swapper/010:17:200
134491520,3ptp4l0-21swapper/310:23:533
134491520,12ptp4l0-21swapper/012:20:230
134491520,11ptp4l0-21swapper/312:37:063
26577995117,3cyclictest33-21ksoftirqd/212:35:002
2657699510,26cyclictest10840-21chrt10:03:591
2657699510,26cyclictest10146-21runrttasks08:50:401
134491510,4ptp4l0-21swapper/311:02:423
134491510,4ptp4l0-21swapper/310:13:283
134491510,3ptp4l0-21swapper/309:53:363
26577995022,7cyclictest33-21ksoftirqd/211:11:072
2657699503,17cyclictest134491ptp4l11:04:591
2657699500,28cyclictest6775-21taskset12:14:511
2657699500,27cyclictest20372-21seq10:25:081
134491500,4ptp4l0-21swapper/308:08:483
134491500,4ptp4l0-21swapper/307:26:433
134491500,4ptp4l0-21swapper/012:07:510
134491500,3ptp4l0-21swapper/312:19:073
134491500,2ptp4l0-21swapper/311:09:033
26577994921,8cyclictest33-21ksoftirqd/211:28:492
26577994920,7cyclictest33-21ksoftirqd/211:20:002
2657699491,27cyclictest26804-21seq10:37:061
134491490,3ptp4l0-21swapper/312:28:093
134491490,3ptp4l0-21swapper/309:39:393
2657799482,4cyclictest0-21swapper/210:52:122
2657799482,4cyclictest0-21swapper/208:41:062
26577994820,4cyclictest33-21ksoftirqd/211:40:042
26577994819,4cyclictest33-21ksoftirqd/211:35:002
26577994819,4cyclictest33-21ksoftirqd/211:35:002
26577994816,6cyclictest33-21ksoftirqd/208:30:012
26577994816,3cyclictest33-21ksoftirqd/209:04:252
134491480,3ptp4l0-21swapper/110:54:221
134491480,2ptp4l121rcu_preempt10:45:143
2657799472,4cyclictest0-21swapper/209:34:412
2657799472,4cyclictest0-21swapper/209:15:362
26577994719,7cyclictest33-21ksoftirqd/210:31:282
26577994716,4cyclictest33-21ksoftirqd/208:39:372
26577994713,4cyclictest33-21ksoftirqd/211:00:012
2657699470,27cyclictest21777-21seq09:16:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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