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2025-12-19 - 04:10
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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 Dec 19, 2025 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
79262870,3sleep07929-21processes19:10:230
667999801,77cyclictest0-21swapper/223:40:282
667999781,75cyclictest0-21swapper/220:40:282
134491730,32ptp4l25-21ksoftirqd/121:35:171
667999715,24cyclictest13498-21irqrtprio00:00:212
6679997110,18cyclictest18444-21df_abs19:35:142
667999690,29cyclictest11219-21date19:19:582
667999682,24cyclictest0-21swapper/220:25:162
134491670,4ptp4l9058-21/usr/sbin/munin22:40:281
667999661,26cyclictest19196-21taskset23:00:562
667999660,27cyclictest29281-21chrt19:57:402
667999660,26cyclictest24144-21chrt00:23:222
667999660,25cyclictest32387-21chrt21:14:412
667999660,25cyclictest28090-21cat21:05:132
667999660,20cyclictest134491ptp4l20:55:152
667999651,26cyclictest4911-21chrt21:25:002
667999651,21cyclictest15211-21timerandwakeup20:35:282
667999640,26cyclictest9192-21chrt21:33:482
667999640,24cyclictest24290-21timerandwakeup19:45:262
667999630,28cyclictest20332-21cat21:55:262
667999630,28cyclictest20332-21cat21:55:262
667999630,27cyclictest12288-21chrt23:56:452
667999630,26cyclictest7667-21chrt23:46:272
667999630,26cyclictest4679-21chrt22:32:572
667999630,26cyclictest4641-21chrt21:24:242
667999630,26cyclictest30985-21chrt23:28:452
667999620,29cyclictest2111-21taskset21:17:222
667999620,27cyclictest9350-21chrt22:40:552
667999620,27cyclictest25307-21chrt22:06:052
667999612,24cyclictest0-21swapper/223:15:522
667999610,38cyclictest8832-21cat19:14:582
667999610,27cyclictest22539-21chrt20:52:402
667999610,26cyclictest27283-21chrt21:01:412
667999610,25cyclictest3091-21chrt23:36:592
667999610,25cyclictest22356-21chrt19:42:152
667999600,27cyclictest19493-21taskset00:13:012
667999600,26cyclictest28695-21taskset23:24:322
667999600,26cyclictest2511-21chrt22:29:402
667999600,26cyclictest21865-21taskset00:18:512
667999600,26cyclictest1643-21chrt20:08:512
667999600,26cyclictest14554-21taskset22:53:112
667999600,25cyclictest31658-21taskset20:02:452
667999592,32cyclictest0-21swapper/220:15:132
667999591,29cyclictest15900-21taskset19:30:072
667999591,19cyclictest25645-21ntp_states00:25:242
667999590,26cyclictest27598-21chrt22:11:022
667999590,26cyclictest11450-21chrt21:38:172
667999590,25cyclictest11994-21chrt22:47:372
134491580,4ptp4l0-21swapper/100:15:261
667999570,26cyclictest28565-21taskset00:31:162
134491570,4ptp4l23094-21chrt22:02:111
134491570,3ptp4l0-21swapper/123:04:021
667999560,24cyclictest7298-21taskset22:39:152
134491560,4ptp4l0-21swapper/020:01:400
134491560,3ptp4l0-21swapper/120:32:241
134491560,3ptp4l0-21swapper/119:45:201
667999550,52cyclictest11477-21apt-get20:30:122
134491550,4ptp4l0-21swapper/119:59:141
134491550,3ptp4l0-21swapper/119:15:171
667999540,27cyclictest12081-21grep21:40:142
134491540,4ptp4l20152-21fschecks_time23:05:163
134491540,4ptp4l0-21swapper/320:44:313
134491540,4ptp4l0-21swapper/023:24:260
134491540,4ptp4l0-21swapper/000:10:040
134491530,4ptp4l0-21swapper/121:15:511
134491530,3ptp4l0-21swapper/121:00:271
134491530,3ptp4l0-21swapper/119:41:251
134491530,2ptp4l6706-21latency_hist20:19:590
667999520,49cyclictest18945-21interrupts20:45:172
134491520,6ptp4l0-21swapper/319:05:473
134491520,4ptp4l0-21swapper/123:34:241
134491520,4ptp4l0-21swapper/120:23:481
134491520,4ptp4l0-21swapper/120:12:451
134491520,4ptp4l0-21swapper/020:26:340
134491520,3ptp4l0-21swapper/123:40:181
134491520,3ptp4l0-21swapper/120:51:091
134491520,3ptp4l0-21swapper/019:44:050
134491510,4ptp4l0-21swapper/323:16:483
134491510,3ptp4l0-21swapper/119:21:071
134491500,5ptp4l0-21swapper/219:05:322
134491500,4ptp4l0-21swapper/319:38:513
134491500,4ptp4l0-21swapper/122:32:421
134491500,3ptp4l0-21swapper/320:55:053
134491500,3ptp4l0-21swapper/122:53:241
134491500,3ptp4l0-21swapper/022:05:140
134491500,12ptp4l0-21swapper/122:12:431
134491490,5ptp4l0-21swapper/019:08:330
134491490,4ptp4l0-21swapper/323:49:163
134491490,4ptp4l0-21swapper/121:25:381
134491490,4ptp4l0-21swapper/120:02:001
134491480,4ptp4l0-21swapper/322:45:323
134491480,4ptp4l0-21swapper/319:18:393
134491480,4ptp4l0-21swapper/300:38:243
134491480,4ptp4l0-21swapper/023:44:260
134491480,3ptp4l0-21swapper/119:52:121
134491470,4ptp4l0-21swapper/122:29:111
134491470,3ptp4l0-21swapper/319:33:463
134491470,3ptp4l0-21swapper/019:20:400
6680994614,4cyclictest41-21ksoftirqd/300:10:013
134491460,4ptp4l0-21swapper/123:11:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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