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2026-09-19 - 09:33
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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 Sat Sep 19, 2026 00:49:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273913330,324ptp4l0-21swapper/119:09:001
20089922020,199cyclictest151rcu_preempt22:20:1430
330891209201,6phc2sys0-21swapper/219:05:2512
20949918020,113cyclictest0-21swapper/1920:20:5211
20949918020,113cyclictest0-21swapper/1920:20:5211
21329917913,148cyclictest0-21swapper/2423:50:1817
21329917212,108cyclictest0-21swapper/2422:10:2117
20949917019,121cyclictest0-21swapper/1921:30:2311
20949915817,107cyclictest4940-21latency_hist21:40:0011
21329915313,90cyclictest0-21swapper/2420:40:1817
21329915313,90cyclictest0-21swapper/2420:40:1817
199999153151,1cyclictest151rcu_preempt22:51:5729
21169915020,96cyclictest0-21swapper/2200:04:0615
19549914986,63cyclictest13-21ksoftirqd/022:26:190
19999914815,131cyclictest0-21swapper/722:05:1429
21729914632,109cyclictest0-21swapper/2923:10:1622
19999914615,125cyclictest0-21swapper/723:04:4729
1984991450,86cyclictest0-21swapper/520:50:0427
1984991450,86cyclictest0-21swapper/520:50:0427
21729914431,84cyclictest0-21swapper/2900:21:3522
21729914431,112cyclictest0-21swapper/2922:40:2122
21169914474,49cyclictest1947-21cyclictest22:27:3715
20949914418,94cyclictest0-21swapper/1922:37:0811
19999914415,77cyclictest0-21swapper/700:23:5229
21729914328,114cyclictest0-21swapper/2900:12:3322
21729914227,84cyclictest0-21swapper/2900:03:5722
20949914218,94cyclictest0-21swapper/1923:16:0911
20949914218,100cyclictest0-21swapper/1923:35:2411
19999914015,76cyclictest0-21swapper/723:40:3629
21729913926,91cyclictest0-21swapper/2921:27:3922
21329913913,61cyclictest0-21swapper/2420:45:2117
21329913913,61cyclictest0-21swapper/2420:45:2117
19999913915,69cyclictest0-21swapper/719:35:0129
1984991390,86cyclictest0-21swapper/523:37:2127
2181991380,88cyclictest0-21swapper/3020:10:2524
2181991380,88cyclictest0-21swapper/3020:10:2524
1984991380,84cyclictest0-21swapper/522:46:4627
21329913712,83cyclictest0-21swapper/2400:21:5017
21169913745,55cyclictest0-21swapper/2223:23:4415
21169913736,69cyclictest0-21swapper/2220:36:1315
21169913736,69cyclictest0-21swapper/2220:36:1315
20949913743,61cyclictest0-21swapper/1920:05:0811
20949913743,61cyclictest0-21swapper/1920:05:0811
20949913726,66cyclictest0-21swapper/1923:12:2811
1984991370,83cyclictest0-21swapper/521:18:5527
21169913651,58cyclictest0-21swapper/2221:27:1315
21169913629,70cyclictest0-21swapper/2219:21:0715
20189913625,64cyclictest0-21swapper/919:31:0331
21329913512,78cyclictest0-21swapper/2423:45:0017
21169913547,54cyclictest0-21swapper/2219:38:3815
21169913532,76cyclictest0-21swapper/2200:33:0715
21169913529,67cyclictest0-21swapper/2222:09:4415
21169913528,76cyclictest0-21swapper/2200:39:3715
21169913528,75cyclictest0-21swapper/2223:42:5915
20949913522,76cyclictest0-21swapper/1900:34:4511
20949913519,82cyclictest0-21swapper/1900:02:0711
20949913518,74cyclictest0-21swapper/1923:44:0011
21169913443,61cyclictest0-21swapper/2223:05:1815
21169913429,69cyclictest0-21swapper/2221:49:0815
21169913428,68cyclictest0-21swapper/2200:23:0315
21169913427,69cyclictest0-21swapper/2221:10:0615
21169913427,69cyclictest0-21swapper/2221:10:0615
21169913427,67cyclictest0-21swapper/2223:46:1115
21169913427,67cyclictest0-21swapper/2222:31:5415
21169913426,67cyclictest0-21swapper/2222:04:0515
21169913425,65cyclictest0-21swapper/2219:43:0115
20189913443,61cyclictest0-21swapper/922:19:1431
2172991330,78cyclictest0-21swapper/2923:39:0722
21169913353,62cyclictest0-21swapper/2223:10:2315
20949913330,71cyclictest0-21swapper/1900:27:4911
2086991330,85cyclictest0-21swapper/1823:41:1910
20189913348,62cyclictest0-21swapper/920:46:2431
20189913348,62cyclictest0-21swapper/920:46:2431
20189913348,54cyclictest0-21swapper/922:40:4631
2018991331,79cyclictest0-21swapper/923:40:0631
19999913315,63cyclictest0-21swapper/700:00:2229
21729913219,109cyclictest191-21ksoftirqd/2921:50:3922
21169913231,70cyclictest0-21swapper/2200:11:5115
21169913230,71cyclictest0-21swapper/2223:31:1315
20949913231,75cyclictest0-21swapper/1900:21:2211
20949913228,67cyclictest0-21swapper/1921:21:1711
20949913227,71cyclictest0-21swapper/1900:19:1711
21329913125,65cyclictest0-21swapper/2400:03:4017
21329913113,57cyclictest0-21swapper/2420:10:2117
21329913113,57cyclictest0-21swapper/2420:10:2117
21169913154,65cyclictest0-21swapper/2222:45:4815
20949913137,63cyclictest0-21swapper/1920:47:3811
20949913137,63cyclictest0-21swapper/1920:47:3811
20949913128,67cyclictest0-21swapper/1923:30:3811
20949913128,67cyclictest0-21swapper/1922:58:0211
20949913127,72cyclictest0-21swapper/1923:50:2511
20949913127,70cyclictest0-21swapper/1922:14:1111
20949913127,69cyclictest0-21swapper/1920:50:1811
20949913127,69cyclictest0-21swapper/1920:50:1711
20189913146,56cyclictest0-21swapper/923:34:4531
20189913128,67cyclictest0-21swapper/921:22:1231
21169913030,72cyclictest0-21swapper/2223:00:1315
21169913029,76cyclictest0-21swapper/2219:26:5415
21169913026,61cyclictest0-21swapper/2222:15:5215
20949913047,62cyclictest0-21swapper/1922:22:4511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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