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2026-09-06 - 01:13
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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 05, 2026 12:49:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2477199319121,1cyclictest151rcu_preempt11:52:1411
3273913140,306ptp4l0-21swapper/107:07:081
247959928287,4cyclictest155-21ksoftirqd/2310:41:0616
247959928287,4cyclictest155-21ksoftirqd/2310:41:0516
330891279271,6phc2sys0-21swapper/207:05:3712
24675991885,168cyclictest151rcu_preempt09:16:1227
2481599181178,2cyclictest0-21swapper/2609:47:3919
24675991756,143cyclictest151rcu_preempt12:03:1227
24764991670,146cyclictest0-21swapper/1811:27:0610
24764991670,146cyclictest0-21swapper/1811:27:0610
24764991660,144cyclictest0-21swapper/1812:17:2110
24764991651,121cyclictest0-21swapper/1810:43:1710
24764991651,121cyclictest0-21swapper/1810:43:1710
2484699158155,2cyclictest31587-21latency_hist10:05:0125
24764991500,97cyclictest0-21swapper/1810:35:1510
24764991500,97cyclictest0-21swapper/1810:35:1510
246759914816,83cyclictest0-21swapper/511:48:4827
24675991460,85cyclictest0-21swapper/510:15:4827
24707991420,83cyclictest0-21swapper/1009:01:422
246759914213,81cyclictest0-21swapper/510:32:2227
246759914213,81cyclictest0-21swapper/510:32:2227
246759914212,126cyclictest151rcu_preempt10:44:0827
246759914212,126cyclictest151rcu_preempt10:44:0827
24764991410,93cyclictest0-21swapper/1809:45:0110
24839991400,83cyclictest0-21swapper/3007:30:0024
24839991390,83cyclictest0-21swapper/3012:21:1724
246699913927,107cyclictest0-21swapper/408:55:1726
248399913850,64cyclictest0-21swapper/3010:40:4824
248399913850,64cyclictest0-21swapper/3010:40:4824
248399913825,65cyclictest0-21swapper/3010:25:1824
248399913825,65cyclictest0-21swapper/3010:25:1724
248399913822,74cyclictest0-21swapper/3009:46:4924
24839991380,82cyclictest0-21swapper/3011:47:3724
248399913743,63cyclictest0-21swapper/3009:17:2524
248399913743,54cyclictest0-21swapper/3010:10:5224
248399913743,54cyclictest0-21swapper/3010:10:5224
248399913627,68cyclictest0-21swapper/3009:34:0024
24839991360,84cyclictest0-21swapper/3010:09:4724
24839991360,84cyclictest0-21swapper/3010:09:4724
24764991360,97cyclictest0-21swapper/1811:31:5510
24764991360,97cyclictest0-21swapper/1811:31:5510
248399913551,63cyclictest0-21swapper/3011:28:2224
248399913551,63cyclictest0-21swapper/3011:28:2224
248399913542,57cyclictest0-21swapper/3010:46:0924
248399913542,57cyclictest0-21swapper/3010:46:0924
24679991350,87cyclictest0-21swapper/609:37:2028
246699913527,107cyclictest0-21swapper/410:58:0326
246699913527,107cyclictest0-21swapper/410:58:0326
248399913443,56cyclictest0-21swapper/3011:14:1424
248399913443,56cyclictest0-21swapper/3011:14:1424
248399913442,60cyclictest0-21swapper/3009:29:4324
24839991340,78cyclictest0-21swapper/3012:10:3624
24839991340,75cyclictest0-21swapper/3010:15:4124
246759913465,52cyclictest0-21swapper/509:05:1527
246699913427,106cyclictest0-21swapper/411:05:1726
246699913427,106cyclictest0-21swapper/411:05:1726
246699913425,17cyclictest0-21swapper/411:33:0526
246699913425,17cyclictest0-21swapper/411:33:0526
248399913353,71cyclictest0-21swapper/3011:07:3224
248399913353,71cyclictest0-21swapper/3011:07:3224
248399913342,71cyclictest0-21swapper/3010:02:1924
248399913331,66cyclictest0-21swapper/3010:38:0824
248399913331,66cyclictest0-21swapper/3010:38:0824
248399913328,71cyclictest0-21swapper/3010:31:1124
248399913328,71cyclictest0-21swapper/3010:31:1124
248399913328,65cyclictest0-21swapper/3011:40:2524
246759913321,83cyclictest0-21swapper/511:37:4627
24675991330,83cyclictest0-21swapper/510:51:0427
24675991330,83cyclictest0-21swapper/510:51:0427
246699913326,73cyclictest0-21swapper/409:10:2426
246699913326,64cyclictest0-21swapper/410:25:1426
246699913326,64cyclictest0-21swapper/410:25:1426
248399913230,68cyclictest0-21swapper/3010:54:4224
248399913230,68cyclictest0-21swapper/3010:54:4224
248399913230,67cyclictest0-21swapper/3008:35:1324
248399913226,62cyclictest0-21swapper/3008:46:5824
246759913243,59cyclictest0-21swapper/512:08:4527
248399913129,65cyclictest0-21swapper/3007:15:2224
248399913126,69cyclictest0-21swapper/3008:20:3324
248399913124,75cyclictest0-21swapper/3011:38:3224
248399913122,76cyclictest0-21swapper/3007:46:2124
246759913127,62cyclictest0-21swapper/507:16:1527
24675991310,81cyclictest0-21swapper/512:18:4427
246699913127,90cyclictest0-21swapper/409:32:3326
248399913030,70cyclictest0-21swapper/3008:51:3224
248399913030,68cyclictest0-21swapper/3008:05:1724
248399913025,62cyclictest0-21swapper/3008:16:4924
248399912929,55cyclictest0-21swapper/3012:02:3524
248399912928,72cyclictest0-21swapper/3008:57:3824
248399912928,64cyclictest0-21swapper/3009:59:5724
248399912928,64cyclictest0-21swapper/3009:59:5724
24839991292,81cyclictest0-21swapper/3007:41:3324
24839991292,78cyclictest0-21swapper/3007:35:2224
248399912927,66cyclictest0-21swapper/3008:33:5424
248399912926,65cyclictest0-21swapper/3007:33:4524
248399912925,76cyclictest0-21swapper/3011:23:0224
248399912925,76cyclictest0-21swapper/3011:23:0224
248399912915,75cyclictest0-21swapper/3011:59:5424
247079912952,60cyclictest0-21swapper/1011:45:412
246759912957,55cyclictest0-21swapper/511:14:0327
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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