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2026-05-22 - 10:09
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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
Characteristics of the 100 highest latencies:
System rackdslot1.osadl.org (updated Fri May 22, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1925921510,7sleep02814599cyclictest21:10:040
1297521370,6sleep22814799cyclictest19:45:212
2814899732,29cyclictest0-21swapper/323:00:183
134491700,6ptp4l33-21ksoftirqd/221:26:092
134491700,4ptp4l1301-21snmpd19:40:062
134491690,30ptp4l17900-21sh21:05:242
28146996813,12cyclictest32691-21chrt22:46:011
2814699677,58cyclictest0-21swapper/119:45:251
28146996713,11cyclictest23897-21chrt23:36:441
134491660,4ptp4l26646-21date23:45:010
2814699659,16cyclictest0-21swapper/123:55:161
28146996513,12cyclictest4612-21chrt20:35:511
28146996513,11cyclictest26176-21taskset21:25:091
28146996413,12cyclictest25689-21taskset22:32:331
28146996413,11cyclictest21105-21taskset22:22:381
28146996413,10cyclictest21110-21chrt21:12:131
28146996413,10cyclictest13944-21taskset20:57:231
28146996314,10cyclictest5335-21taskset21:50:051
28146996313,11cyclictest19058-21chrt23:26:171
28146996313,11cyclictest18517-21taskset19:55:431
28146996213,11cyclictest27933-21chrt20:18:141
28146996213,11cyclictest14286-21chrt22:09:381
134491620,4ptp4l24291-21iostat20:10:160
134491610,9ptp4l0-21swapper/319:05:243
134491610,5ptp4l0-21swapper/219:09:252
2814699601,57cyclictest21025-21kworker/1:020:23:091
2814699597,15cyclictest9181-21timerwakeupswit21:55:301
28146995914,11cyclictest2717-21chrt22:51:551
28146995914,10cyclictest16212-21chrt19:53:581
143432590,2sleep314336-21awk22:10:013
134491590,5ptp4l25-21ksoftirqd/123:22:331
134491590,4ptp4l0-21swapper/222:28:572
134491590,3ptp4l0-21swapper/000:05:290
2814899585,9cyclictest13408-21grep20:55:243
28148995827,8cyclictest41-21ksoftirqd/322:50:243
2814899582,23cyclictest0-21swapper/321:35:203
28146995814,9cyclictest19729-21chrt00:38:231
28146995810,15cyclictest11711-21latency_hist19:45:001
272992580,7sleep02814599cyclictest23:45:180
134491580,4ptp4l0-21swapper/020:56:440
134491580,3ptp4l0-21swapper/322:25:293
134491580,3ptp4l0-21swapper/021:25:380
2814699579,17cyclictest14901-21cat21:00:171
134491570,4ptp4l0-21swapper/320:43:443
134491570,4ptp4l0-21swapper/023:50:170
134491570,3ptp4l0-21swapper/223:59:352
134491570,3ptp4l0-21swapper/220:44:392
134491570,3ptp4l0-21swapper/021:15:170
28146995614,38cyclictest32375-21seq20:26:031
134491560,4ptp4l0-21swapper/122:10:201
134491560,4ptp4l0-21swapper/021:34:190
134491560,3ptp4l0-21swapper/323:17:263
134491560,3ptp4l0-21swapper/020:50:140
2814699558,10cyclictest0-21swapper/119:15:581
28146995513,9cyclictest12825-21taskset00:23:101
134491550,4ptp4l0-21swapper/200:14:062
134491550,4ptp4l0-21swapper/020:20:380
134491550,4ptp4l0-21swapper/000:36:410
134491550,3ptp4l0-21swapper/000:00:140
2814899544,9cyclictest41-21ksoftirqd/319:30:273
2814699543,49cyclictest7476-21kworker/1:100:00:481
28146995410,11cyclictest4829-21cat00:05:221
134491540,4ptp4l0-21swapper/219:18:432
134491540,4ptp4l0-21swapper/021:22:200
134491540,4ptp4l0-21swapper/019:30:550
2814699536,5cyclictest0-21swapper/120:06:411
2814699532,49cyclictest20803-21kworker/1:119:29:091
134491530,4ptp4l0-21swapper/021:52:240
134491530,4ptp4l0-21swapper/020:03:320
134491530,11ptp4l25809-21apt-get19:05:120
2814899526,6cyclictest41-21ksoftirqd/322:45:273
2814899523,6cyclictest41-21ksoftirqd/323:45:233
28148995227,9cyclictest41-21ksoftirqd/322:35:183
2814899522,10cyclictest0-21swapper/323:25:263
2814899520,6cyclictest41-21ksoftirqd/320:10:153
28146995216,10cyclictest28672-21seq23:48:391
28146995215,12cyclictest2555-21seq20:33:531
28146995214,11cyclictest30360-21seq21:32:431
134491520,3ptp4l0-21swapper/220:00:122
134491520,11ptp4l0-21swapper/023:05:400
2814899515,4cyclictest41-21ksoftirqd/320:25:243
2814899514,8cyclictest41-21ksoftirqd/321:40:283
2814899514,6cyclictest0-21swapper/323:50:173
2814899513,7cyclictest0-21swapper/322:10:223
2814899513,6cyclictest41-21ksoftirqd/322:20:243
2814899513,6cyclictest41-21ksoftirqd/300:35:163
2814899513,6cyclictest41-21ksoftirqd/300:15:193
2814899512,7cyclictest0-21swapper/323:35:173
2814899512,7cyclictest0-21swapper/321:50:123
2814899512,7cyclictest0-21swapper/300:10:173
2814899512,6cyclictest41-21ksoftirqd/319:40:113
2814899512,6cyclictest17274-21if_enp4s019:55:183
2814899512,11cyclictest0-21swapper/300:29:013
2814899512,10cyclictest0-21swapper/322:15:203
2814899511,8cyclictest0-21swapper/320:35:183
2814899511,6cyclictest41-21ksoftirqd/320:50:263
2814899511,6cyclictest0-21swapper/323:40:273
2814899510,6cyclictest41-21ksoftirqd/323:05:243
2814699519,7cyclictest24107-21df21:20:131
134491510,9ptp4l26123-21diskstats19:05:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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