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2026-05-19 - 17:51
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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 Tue May 19, 2026 12:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
768021720,6sleep02854799cyclictest11:00:170
255421530,6sleep02854799cyclictest10:50:140
28547997626,5cyclictest9-21ksoftirqd/009:40:010
2854999694,63cyclictest0-21swapper/211:45:292
134491620,4ptp4l11218-21meminfo07:40:180
134491600,4ptp4l0-21swapper/112:15:171
134491600,3ptp4l29364-21df09:30:140
134491600,3ptp4l29364-21df09:30:140
134491600,2ptp4l30010-21ssh07:10:273
134491600,16ptp4l0-21swapper/308:35:263
134491590,4ptp4l0-21swapper/310:49:193
134491590,4ptp4l0-21swapper/209:23:162
134491590,3ptp4l0-21swapper/108:43:321
28547995828,4cyclictest9-21ksoftirqd/007:39:590
28547995828,3cyclictest9-21ksoftirqd/007:24:590
134491580,5ptp4l0-21swapper/007:55:020
134491580,4ptp4l0-21swapper/012:26:040
134491580,3ptp4l0-21swapper/211:24:432
134491570,4ptp4l0-21swapper/107:43:021
134491570,4ptp4l0-21swapper/011:52:020
134491570,3ptp4l4368-21processes07:25:263
134491570,3ptp4l0-21swapper/211:18:262
134491570,3ptp4l0-21swapper/110:39:151
134491570,3ptp4l0-21swapper/012:20:270
134491570,3ptp4l0-21swapper/011:41:250
73282560,5sleep00-21swapper/009:50:240
28547995629,6cyclictest9-21ksoftirqd/010:20:000
134491560,6ptp4l0-21swapper/107:07:561
134491560,4ptp4l0-21swapper/011:09:250
134491560,3ptp4l0-21swapper/111:06:561
134491560,16ptp4l0-21swapper/110:46:421
87972550,4sleep30-21swapper/312:10:293
134491550,4ptp4l0-21swapper/311:55:523
28547995425,3cyclictest9-21ksoftirqd/010:00:180
28547995424,5cyclictest9-21ksoftirqd/008:11:270
28547995424,3cyclictest9-21ksoftirqd/007:47:390
28547995424,3cyclictest9-21ksoftirqd/007:47:390
28547995423,4cyclictest9-21ksoftirqd/008:50:260
134491540,4ptp4l0-21swapper/108:13:531
28547995316,5cyclictest9-21ksoftirqd/011:00:000
134491530,4ptp4l0-21swapper/311:19:203
134491530,4ptp4l0-21swapper/012:36:520
134491530,3ptp4l0-21swapper/011:16:470
28547995217,4cyclictest9-21ksoftirqd/010:25:250
134491520,4ptp4l0-21swapper/012:15:460
134491520,3ptp4l0-21swapper/012:10:230
28547995120,5cyclictest9-21ksoftirqd/009:25:270
134491510,4ptp4l0-21swapper/307:55:123
134491510,4ptp4l0-21swapper/107:56:341
134491510,3ptp4l0-21swapper/112:35:271
134491510,3ptp4l0-21swapper/012:04:510
28547995025,7cyclictest9-21ksoftirqd/010:41:510
28547995022,7cyclictest9-21ksoftirqd/007:27:020
28547995019,3cyclictest9-21ksoftirqd/007:10:180
28547995018,3cyclictest9-21ksoftirqd/010:10:170
28547995013,7cyclictest9-21ksoftirqd/008:25:250
134491500,8ptp4l0-21swapper/307:35:013
134491500,5ptp4l0-21swapper/207:05:322
134491500,4ptp4l0-21swapper/310:50:333
28547994919,3cyclictest9-21ksoftirqd/008:17:450
28547994917,3cyclictest9-21ksoftirqd/008:31:410
28547994917,3cyclictest9-21ksoftirqd/007:19:080
134491490,4ptp4l0-21swapper/111:57:071
134491490,3ptp4l0-21swapper/109:05:501
134491490,3ptp4l0-21swapper/011:59:440
134491490,3ptp4l0-21swapper/010:49:270
28547994820,7cyclictest9-21ksoftirqd/011:39:030
28547994814,5cyclictest9-21ksoftirqd/011:25:140
28547994813,6cyclictest9-21ksoftirqd/009:55:200
28547994811,6cyclictest9-21ksoftirqd/009:15:180
134491480,5ptp4l0-21swapper/307:05:483
134491480,4ptp4l0-21swapper/009:10:160
134491480,3ptp4l0-21swapper/110:22:281
134491480,3ptp4l0-21swapper/108:52:001
134491480,3ptp4l0-21swapper/108:15:081
134491480,3ptp4l0-21swapper/011:21:490
2854799473,3cyclictest121rcu_preempt08:48:040
28547994721,6cyclictest9-21ksoftirqd/007:32:230
28547994720,6cyclictest9-21ksoftirqd/007:51:360
28547994719,7cyclictest9-21ksoftirqd/008:22:460
28547994714,6cyclictest9-21ksoftirqd/009:45:010
134491470,3ptp4l0-21swapper/008:38:180
28547994620,7cyclictest9-21ksoftirqd/010:35:000
28547994617,3cyclictest9-21ksoftirqd/008:05:000
28547994614,6cyclictest9-21ksoftirqd/009:05:170
134491460,8ptp4l0-21swapper/310:11:023
134491460,4ptp4l0-21swapper/009:45:120
134491460,3ptp4l0-21swapper/310:05:043
2854799455,3cyclictest9-21ksoftirqd/008:55:270
28547994519,6cyclictest9-21ksoftirqd/010:32:480
28547994519,4cyclictest9-21ksoftirqd/010:20:210
28547994513,6cyclictest9-21ksoftirqd/008:40:140
134491450,9ptp4l0-21swapper/209:16:002
134491450,4ptp4l0-21swapper/310:21:523
134491450,10ptp4l0-21swapper/209:29:572
134491450,10ptp4l0-21swapper/208:30:322
28547994411,7cyclictest9-21ksoftirqd/011:45:170
134491440,9ptp4l0-21swapper/207:53:242
134491440,5ptp4l0-21swapper/307:50:133
134491440,5ptp4l0-21swapper/208:50:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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