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2026-07-20 - 12:36
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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 Mon Jul 20, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
187221630,7sleep01141899cyclictest22:15:260
111352760,8sleep0212-21systemd-journal19:09:590
144642710,5sleep10-21swapper/119:15:181
134491680,4ptp4l17224-21apt-get00:00:140
134491640,4ptp4l0-21swapper/023:05:240
134491640,4ptp4l0-21swapper/023:05:240
134491640,3ptp4l28993-21meminfo19:45:181
134491610,4ptp4l0-21swapper/021:20:300
1142099597,7cyclictest0-21swapper/200:20:252
134491570,3ptp4l0-21swapper/119:56:201
134491570,3ptp4l0-21swapper/100:13:511
134491560,5ptp4l0-21swapper/019:50:010
134491560,3ptp4l20952-21/usr/sbin/munin00:05:331
134491560,3ptp4l0-21swapper/120:35:161
1142099568,6cyclictest0-21swapper/220:50:232
1142099567,7cyclictest0-21swapper/223:05:142
1142099567,7cyclictest0-21swapper/223:05:142
134491550,4ptp4l0-21swapper/219:10:322
1142099557,7cyclictest0-21swapper/222:00:232
1142099556,6cyclictest0-21swapper/220:05:232
134491540,4ptp4l0-21swapper/121:34:281
134491540,3ptp4l0-21swapper/100:25:191
1142099547,7cyclictest0-21swapper/223:35:222
1142099547,7cyclictest0-21swapper/219:40:142
134491530,4ptp4l0-21swapper/323:29:593
134491530,4ptp4l0-21swapper/320:10:343
134491530,4ptp4l0-21swapper/121:41:111
134491530,3ptp4l0-21swapper/122:21:191
134491530,3ptp4l0-21swapper/121:20:431
134491530,14ptp4l0-21swapper/120:23:481
1142099536,13cyclictest0-21swapper/222:40:262
1142099530,13cyclictest15572-21awk19:15:292
134491520,4ptp4l0-21swapper/300:21:203
134491520,4ptp4l0-21swapper/121:07:341
134491520,4ptp4l0-21swapper/000:28:030
134491520,4ptp4l0-21swapper/000:06:560
134491520,3ptp4l0-21swapper/122:35:251
134491520,3ptp4l0-21swapper/121:15:261
134491520,3ptp4l0-21swapper/121:15:261
134491520,3ptp4l0-21swapper/100:20:141
134491520,3ptp4l0-21swapper/020:00:230
1142099527,12cyclictest0-21swapper/220:10:302
1142099523,11cyclictest31646-21ntpq19:50:222
134491510,9ptp4l10206-21ntp_states19:05:233
134491510,4ptp4l0-21swapper/319:12:063
134491510,4ptp4l0-21swapper/300:35:393
134491510,4ptp4l0-21swapper/120:25:041
134491510,3ptp4l0-21swapper/122:10:421
1142099518,7cyclictest0-21swapper/200:10:262
1142099518,6cyclictest0-21swapper/221:25:162
1142099512,6cyclictest33-21ksoftirqd/222:25:232
1142099512,6cyclictest0-21swapper/200:29:582
1142099512,16cyclictest21314-21grep20:40:122
259732500,4sleep20-21swapper/200:15:272
134491500,4ptp4l0-21swapper/321:17:583
134491500,4ptp4l0-21swapper/321:17:583
134491500,4ptp4l0-21swapper/121:02:221
134491500,3ptp4l0-21swapper/120:42:431
1142099509,7cyclictest0-21swapper/222:50:152
1142099502,5cyclictest0-21swapper/221:30:182
134491490,4ptp4l0-21swapper/121:52:261
134491490,4ptp4l0-21swapper/021:35:560
134491490,4ptp4l0-21swapper/019:22:120
134491490,11ptp4l0-21swapper/200:06:042
1142099497,7cyclictest0-21swapper/200:35:242
134491480,4ptp4l0-21swapper/323:08:123
134491480,4ptp4l0-21swapper/323:08:123
134491480,4ptp4l0-21swapper/122:51:041
134491480,4ptp4l0-21swapper/021:10:010
134491480,3ptp4l0-21swapper/123:01:341
134491480,3ptp4l0-21swapper/020:10:280
134491480,3ptp4l0-21swapper/019:19:360
1142099487,7cyclictest0-21swapper/221:40:282
1142099487,7cyclictest0-21swapper/219:45:252
134491470,4ptp4l0-21swapper/319:26:423
134491470,4ptp4l0-21swapper/319:26:423
134491470,4ptp4l0-21swapper/023:42:530
134491470,4ptp4l0-21swapper/021:15:250
134491470,4ptp4l0-21swapper/021:15:250
134491470,3ptp4l121rcu_preempt23:00:200
134491470,3ptp4l0-21swapper/220:20:132
134491470,3ptp4l0-21swapper/219:39:552
134491470,3ptp4l0-21swapper/120:18:281
1142099477,6cyclictest0-21swapper/223:40:152
1142099477,6cyclictest0-21swapper/220:00:132
1142099475,7cyclictest0-21swapper/221:00:522
134491460,4ptp4l0-21swapper/320:33:483
134491460,4ptp4l0-21swapper/122:09:291
134491460,4ptp4l0-21swapper/120:10:271
134491460,3ptp4l0-21swapper/119:44:041
134491460,3ptp4l0-21swapper/023:46:450
134491460,10ptp4l0-21swapper/200:01:442
1142099461,8cyclictest14319-21apt-get21:35:152
134491450,4ptp4l491-21ls00:30:272
134491450,4ptp4l26107-21apt-get22:00:110
134491450,4ptp4l0-21swapper/121:12:401
134491450,3ptp4l121rcu_preempt20:35:530
134491450,3ptp4l0-21swapper/022:34:070
134491450,11ptp4l0-21swapper/019:25:300
134491450,11ptp4l0-21swapper/019:25:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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