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2026-09-20 - 02:58
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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 Sat Sep 19, 2026 12:49:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273913350,327ptp4l0-21swapper/107:09:191
130339932916,116cyclictest151rcu_preempt09:14:3017
130489929599,0cyclictest151rcu_preempt09:34:4719
1306199251116,1cyclictest151rcu_preempt11:45:4921
1306199251116,1cyclictest151rcu_preempt11:45:4921
111462247236,8sleep90-21swapper/907:05:2531
130129918832,152cyclictest0-21swapper/2111:56:0314
130129918832,152cyclictest0-21swapper/2111:56:0314
130129918332,150cyclictest0-21swapper/2112:31:5214
130289918222,120cyclictest0-21swapper/2307:35:1816
130129918232,115cyclictest0-21swapper/2109:35:3014
130129918131,100cyclictest0-21swapper/2110:10:1414
130129918029,140cyclictest0-21swapper/2110:24:2614
1303399175172,1cyclictest151rcu_preempt11:15:1417
1303399175172,1cyclictest151rcu_preempt11:15:1417
130129917528,98cyclictest0-21swapper/2110:00:0514
130289917122,96cyclictest0-21swapper/2310:45:0016
130289917122,96cyclictest0-21swapper/2310:45:0016
13033991688,149cyclictest0-21swapper/2407:45:1617
13033991688,130cyclictest0-21swapper/2407:20:2317
13033991688,121cyclictest0-21swapper/2412:37:2017
130129916832,90cyclictest0-21swapper/2110:38:3014
130129916832,90cyclictest0-21swapper/2110:38:2914
13033991678,126cyclictest0-21swapper/2411:12:1917
13033991678,126cyclictest0-21swapper/2411:12:1917
130289916522,125cyclictest0-21swapper/2311:00:3016
130829916323,126cyclictest0-21swapper/3112:20:3425
130129916330,77cyclictest0-21swapper/2109:22:0914
130129916125,27cyclictest0-21swapper/2112:35:2314
13033991569,134cyclictest0-21swapper/2408:55:1817
130129915633,90cyclictest0-21swapper/2109:04:5714
130829915527,93cyclictest0-21swapper/3107:55:2925
129119915542,101cyclictest0-21swapper/612:17:5328
129119915542,101cyclictest0-21swapper/612:17:5328
130829915222,127cyclictest151rcu_preempt11:46:0425
130829915222,127cyclictest151rcu_preempt11:46:0425
130129915228,79cyclictest0-21swapper/2112:07:1814
130129915228,79cyclictest0-21swapper/2112:07:1714
130129915226,83cyclictest0-21swapper/2111:01:3314
130129915222,96cyclictest0-21swapper/2111:09:3414
13033991488,94cyclictest0-21swapper/2411:05:1217
13033991488,84cyclictest0-21swapper/2409:35:2217
130129914532,70cyclictest0-21swapper/2112:20:3914
130419914480,23cyclictest167-21ksoftirqd/2510:07:3918
13041991440,87cyclictest0-21swapper/2508:51:4418
130289914420,94cyclictest0-21swapper/2310:12:3916
130289914222,80cyclictest0-21swapper/2308:52:4616
129119914227,113cyclictest0-21swapper/609:50:4528
130829914157,78cyclictest0-21swapper/3108:58:3225
130829914137,76cyclictest0-21swapper/3110:01:1825
130829914122,87cyclictest0-21swapper/3107:10:1925
129119914131,102cyclictest0-21swapper/610:51:0828
129119914131,102cyclictest0-21swapper/610:51:0828
130829914056,63cyclictest0-21swapper/3108:13:2225
130829913953,68cyclictest0-21swapper/3111:30:0225
130829913953,68cyclictest0-21swapper/3111:30:0225
130129913828,56cyclictest0-21swapper/2112:16:2314
130129913828,56cyclictest0-21swapper/2112:16:2214
130829913760,77cyclictest0-21swapper/3111:36:5925
130829913760,77cyclictest0-21swapper/3111:36:5925
130829913726,79cyclictest0-21swapper/3110:49:1125
130829913726,79cyclictest0-21swapper/3110:49:1025
129639913716,36cyclictest0-21swapper/1407:52:476
13033991368,95cyclictest0-21swapper/2411:33:2917
13033991368,95cyclictest0-21swapper/2411:33:2917
130129913644,62cyclictest0-21swapper/2110:17:4414
128819913640,95cyclictest0-21swapper/209:53:5312
130129913544,61cyclictest0-21swapper/2110:42:0414
130129913544,61cyclictest0-21swapper/2110:42:0414
13041991340,82cyclictest0-21swapper/2511:21:5618
13041991340,82cyclictest0-21swapper/2511:21:5518
130129913442,60cyclictest0-21swapper/2111:17:3514
130129913442,60cyclictest0-21swapper/2111:17:3514
130129913441,62cyclictest0-21swapper/2109:32:4914
130829913348,53cyclictest0-21swapper/3111:52:2925
130829913348,53cyclictest0-21swapper/3111:52:2925
13033991338,95cyclictest0-21swapper/2410:28:2017
13033991338,77cyclictest0-21swapper/2410:35:1517
13033991338,77cyclictest0-21swapper/2410:35:1517
13033991338,75cyclictest0-21swapper/2409:50:2217
130129913228,64cyclictest0-21swapper/2111:51:1814
130129913228,64cyclictest0-21swapper/2111:51:1814
128819913223,71cyclictest0-21swapper/211:43:2712
128819913223,71cyclictest0-21swapper/211:43:2712
130829913141,54cyclictest0-21swapper/3109:28:4425
130289913142,56cyclictest0-21swapper/2310:35:2316
130289913142,56cyclictest0-21swapper/2310:35:2316
130289913129,60cyclictest0-21swapper/2309:20:0216
130129913147,53cyclictest0-21swapper/2108:05:1114
130129913141,55cyclictest0-21swapper/2110:30:3314
130129913129,63cyclictest0-21swapper/2109:25:2014
130129913127,67cyclictest0-21swapper/2107:30:5514
130829913026,60cyclictest0-21swapper/3110:08:4825
130829913025,62cyclictest0-21swapper/3112:12:4925
13033991308,37cyclictest0-21swapper/2409:34:1617
130289913028,60cyclictest0-21swapper/2312:06:1516
130289913028,60cyclictest0-21swapper/2312:06:1516
130289913027,69cyclictest0-21swapper/2308:27:0816
130289913018,78cyclictest0-21swapper/2309:32:1916
130129913029,69cyclictest0-21swapper/2110:06:2514
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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