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2026-04-22 - 05:37
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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 Wed Apr 22, 2026 00:49:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273912700,263ptp4l0-21swapper/119:08:471
28448991735,168cyclictest0-21swapper/2623:25:1519
283649917131,93cyclictest0-21swapper/1300:32:225
283649916931,100cyclictest0-21swapper/1322:30:185
283649916931,100cyclictest0-21swapper/1322:30:185
283649916829,94cyclictest0-21swapper/1322:48:095
283649916829,94cyclictest0-21swapper/1322:48:095
2842599166124,1cyclictest151rcu_preempt23:28:5515
2837099163163,0cyclictest100-21ksoftirqd/1423:30:256
28448991625,112cyclictest0-21swapper/2623:02:1519
28448991625,112cyclictest0-21swapper/2623:02:1519
283649915932,70cyclictest0-21swapper/1322:10:125
283649915932,70cyclictest0-21swapper/1322:10:125
28448991502,120cyclictest0-21swapper/2600:26:4319
284579914913,119cyclictest0-21swapper/2823:44:5021
283899914919,90cyclictest2777-21/usr/sbin/munin23:35:148
282949914811,102cyclictest0-21swapper/122:32:411
282949914811,102cyclictest0-21swapper/122:32:411
284579914713,104cyclictest27277-21grep20:25:1321
254172147139,6sleep290-21swapper/2919:05:1922
284579914613,81cyclictest0-21swapper/2822:45:0021
284579914613,81cyclictest0-21swapper/2822:45:0021
283649914522,70cyclictest18671-21sed21:55:015
284579914313,78cyclictest0-21swapper/2823:05:0221
284579914313,104cyclictest0-21swapper/2819:50:0121
269342141134,6sleep270-21swapper/2719:06:5420
283899914021,99cyclictest0-21swapper/1623:15:228
283899914021,99cyclictest0-21swapper/1623:15:228
284579913914,74cyclictest0-21swapper/2800:32:5921
284129913941,60cyclictest137-21ksoftirqd/2022:09:3613
284129913941,60cyclictest137-21ksoftirqd/2022:09:3613
284349913819,84cyclictest4937-21timerandwakeup22:05:2517
284349913819,84cyclictest4937-21timerandwakeup22:05:2517
283899913722,106cyclictest0-21swapper/1621:31:018
283649913745,57cyclictest0-21swapper/1321:35:285
283649913730,59cyclictest0-21swapper/1300:10:315
28448991352,105cyclictest0-21swapper/2622:53:4319
28448991352,105cyclictest0-21swapper/2622:53:4319
284129913511,112cyclictest151rcu_preempt22:13:5213
284129913511,112cyclictest151rcu_preempt22:13:5213
2829499135131,1cyclictest22-21ksoftirqd/100:17:461
28294991350,82cyclictest0-21swapper/120:20:591
284489913454,63cyclictest0-21swapper/2621:24:1019
283899913422,48cyclictest0-21swapper/1621:45:438
283649913426,74cyclictest0-21swapper/1323:34:105
28318991345,128cyclictest0-21swapper/522:09:3327
28318991345,128cyclictest0-21swapper/522:09:3227
284489913331,63cyclictest0-21swapper/2619:25:1819
284349913344,54cyclictest0-21swapper/2421:32:4717
28389991330,77cyclictest0-21swapper/1622:59:568
28389991330,77cyclictest0-21swapper/1622:59:568
283649913346,55cyclictest0-21swapper/1323:14:535
283649913346,55cyclictest0-21swapper/1323:14:535
283649913328,70cyclictest0-21swapper/1320:23:225
283649913327,63cyclictest0-21swapper/1319:40:025
28318991335,76cyclictest0-21swapper/522:40:3227
28318991335,76cyclictest0-21swapper/522:40:3227
28318991335,121cyclictest0-21swapper/521:15:1827
284489913231,65cyclictest0-21swapper/2620:05:2219
284489913231,62cyclictest0-21swapper/2600:21:2219
284489913229,63cyclictest0-21swapper/2622:15:1419
284489913229,63cyclictest0-21swapper/2622:15:1419
284349913226,64cyclictest0-21swapper/2421:25:1717
283899913246,55cyclictest0-21swapper/1623:07:168
283649913231,66cyclictest0-21swapper/1323:52:175
28318991325,74cyclictest0-21swapper/522:22:5427
28318991325,74cyclictest0-21swapper/522:22:5427
28318991325,117cyclictest0-21swapper/523:31:1927
330891131123,6phc2sys0-21swapper/219:05:1612
284489913130,62cyclictest0-21swapper/2619:10:2119
283649913130,66cyclictest0-21swapper/1323:48:335
283649913129,70cyclictest0-21swapper/1320:30:165
283649913128,69cyclictest0-21swapper/1320:50:205
283649913127,64cyclictest0-21swapper/1321:11:255
283649913126,61cyclictest0-21swapper/1320:35:055
284579913013,91cyclictest0-21swapper/2821:40:1921
284579913013,85cyclictest0-21swapper/2823:32:1821
284349913027,63cyclictest0-21swapper/2400:01:2217
283899913047,48cyclictest0-21swapper/1619:30:168
283899913041,57cyclictest0-21swapper/1620:45:388
283899913021,67cyclictest0-21swapper/1622:50:588
283899913021,67cyclictest0-21swapper/1622:50:588
283649913028,72cyclictest0-21swapper/1321:58:275
283649913028,72cyclictest0-21swapper/1321:58:275
283649913028,70cyclictest0-21swapper/1323:29:505
283649913028,68cyclictest0-21swapper/1323:19:415
283649913028,68cyclictest0-21swapper/1323:19:415
283649913028,67cyclictest0-21swapper/1323:42:085
283649913028,67cyclictest0-21swapper/1322:50:175
283649913028,67cyclictest0-21swapper/1322:50:175
283649913027,65cyclictest0-21swapper/1320:16:265
284489912928,64cyclictest0-21swapper/2622:55:1919
284489912928,64cyclictest0-21swapper/2622:55:1919
284349912946,55cyclictest0-21swapper/2421:10:1917
283899912937,59cyclictest0-21swapper/1623:44:178
283649912960,62cyclictest0-21swapper/1322:01:075
283649912929,62cyclictest0-21swapper/1321:05:325
283649912928,68cyclictest0-21swapper/1319:34:105
283649912927,66cyclictest0-21swapper/1323:21:175
28318991295,121cyclictest27750-21taskset21:38:1727
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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