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2026-08-21 - 22:33
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackcslot8.osadl.org (updated Fri Aug 21, 2026 12:48:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
240799929799,1cyclictest151rcu_preempt12:39:0327
3273912050,197ptp4l0-21swapper/107:08:021
3273912050,197ptp4l0-21swapper/107:08:021
330891176168,6phc2sys0-21swapper/207:09:0212
330891176168,6phc2sys0-21swapper/207:09:0112
24087991486,141cyclictest0-21swapper/611:13:3428
24087991486,141cyclictest0-21swapper/611:13:3328
24087991476,125cyclictest0-21swapper/607:50:2828
24087991455,87cyclictest0-21swapper/612:29:2628
24087991435,130cyclictest0-21swapper/610:43:4728
24175991410,85cyclictest0-21swapper/1810:37:5710
24087991416,135cyclictest0-21swapper/609:05:1728
241299913845,71cyclictest0-21swapper/1210:40:194
24065991370,84cyclictest0-21swapper/310:04:0123
24087991355,99cyclictest0-21swapper/609:13:1928
241539913342,37cyclictest0-21swapper/1508:48:537
24065991330,83cyclictest0-21swapper/309:28:1423
242539913251,58cyclictest0-21swapper/2911:04:1922
24065991328,68cyclictest0-21swapper/308:20:2123
240659913227,80cyclictest0-21swapper/309:12:4323
24253991310,82cyclictest0-21swapper/2910:08:1222
24253991310,77cyclictest0-21swapper/2910:46:1022
242539913048,60cyclictest0-21swapper/2911:44:2422
242539912947,55cyclictest0-21swapper/2910:03:2322
242539912924,104cyclictest0-21swapper/2909:16:1222
242539912739,56cyclictest0-21swapper/2910:19:5822
242539912722,63cyclictest0-21swapper/2907:54:0422
241299912730,71cyclictest0-21swapper/1208:20:204
242539912640,55cyclictest0-21swapper/2910:31:1122
242539912545,53cyclictest0-21swapper/2907:15:0322
242539912531,60cyclictest0-21swapper/2909:52:4222
242539912528,62cyclictest0-21swapper/2910:26:3922
242539912527,65cyclictest0-21swapper/2911:35:0322
242539912525,67cyclictest0-21swapper/2911:54:3322
241299912530,48cyclictest0-21swapper/1209:45:024
242539912454,55cyclictest0-21swapper/2910:43:1522
242539912433,65cyclictest0-21swapper/2912:29:5022
242539912426,64cyclictest0-21swapper/2911:45:2822
242539912425,67cyclictest0-21swapper/2911:34:4822
242539912425,65cyclictest0-21swapper/2911:07:3122
242539912425,65cyclictest0-21swapper/2911:07:3122
242539912424,63cyclictest0-21swapper/2912:00:2622
241539912444,56cyclictest0-21swapper/1507:51:407
241539912424,62cyclictest0-21swapper/1509:45:167
242539912331,63cyclictest0-21swapper/2909:13:3322
242539912328,71cyclictest0-21swapper/2912:23:5722
242539912327,63cyclictest0-21swapper/2910:38:0822
242539912327,59cyclictest0-21swapper/2908:35:2822
242539912326,62cyclictest0-21swapper/2910:50:5822
242539912325,66cyclictest0-21swapper/2911:15:0022
242539912325,66cyclictest0-21swapper/2911:15:0022
242539912324,65cyclictest0-21swapper/2911:59:5422
241299912327,71cyclictest0-21swapper/1211:20:254
242539912241,61cyclictest0-21swapper/2907:25:4422
242539912230,71cyclictest0-21swapper/2909:21:1022
242539912229,64cyclictest0-21swapper/2911:15:0722
242539912229,64cyclictest0-21swapper/2911:15:0622
242539912228,67cyclictest0-21swapper/2909:57:3022
242539912228,67cyclictest0-21swapper/2908:25:0422
242539912228,65cyclictest0-21swapper/2908:08:4622
242539912227,62cyclictest0-21swapper/2910:13:3222
242539912226,64cyclictest0-21swapper/2911:23:0122
242539912226,63cyclictest0-21swapper/2909:48:2522
242539912226,62cyclictest0-21swapper/2912:09:3122
242539912223,64cyclictest0-21swapper/2909:05:0822
241539912227,62cyclictest0-21swapper/1509:13:287
241539912223,63cyclictest0-21swapper/1510:55:007
241299912237,59cyclictest0-21swapper/1209:51:254
24108991220,66cyclictest0-21swapper/909:52:0731
240659912215,62cyclictest0-21swapper/310:33:2523
242539912127,62cyclictest0-21swapper/2909:30:1522
242539912127,60cyclictest0-21swapper/2908:52:1922
242539912126,63cyclictest0-21swapper/2909:27:0322
242539912125,63cyclictest0-21swapper/2907:13:1322
242539912121,56cyclictest0-21swapper/2908:42:4222
241539912125,52cyclictest0-21swapper/1511:45:147
242539912031,77cyclictest0-21swapper/2910:24:4722
242539912028,67cyclictest0-21swapper/2912:39:2722
242539912028,66cyclictest0-21swapper/2907:40:1022
241539912027,60cyclictest0-21swapper/1511:13:437
241539912027,60cyclictest0-21swapper/1511:13:427
241539912026,64cyclictest0-21swapper/1507:31:557
241539912026,58cyclictest0-21swapper/1507:45:177
241539912025,68cyclictest0-21swapper/1511:06:137
241539912025,68cyclictest0-21swapper/1511:06:137
241539912025,62cyclictest0-21swapper/1512:29:217
241539912024,61cyclictest0-21swapper/1510:49:407
241299912024,80cyclictest0-21swapper/1211:56:474
242539911942,61cyclictest0-21swapper/2907:55:4022
242539911928,70cyclictest0-21swapper/2907:20:2422
242539911927,59cyclictest0-21swapper/2908:55:3122
241759911919,65cyclictest0-21swapper/1811:26:0210
241539911927,61cyclictest0-21swapper/1510:00:297
241539911926,66cyclictest0-21swapper/1512:11:267
241539911924,64cyclictest0-21swapper/1511:20:067
241539911917,56cyclictest0-21swapper/1511:55:567
242539911825,60cyclictest0-21swapper/2908:34:4022
242189911825,27cyclictest0-21swapper/2409:45:1317
241539911828,65cyclictest0-21swapper/1509:32:417
241539911826,59cyclictest0-21swapper/1508:17:537
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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