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2026-04-12 - 11:24
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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 Sun Apr 12, 2026 00:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491610,4ptp4l26053-21diskstats20:15:170
134491590,4ptp4l0-21swapper/122:34:061
134491580,17ptp4l0-21swapper/119:25:011
134491570,4ptp4l0-21swapper/300:21:383
134491570,4ptp4l0-21swapper/122:10:231
134491570,4ptp4l0-21swapper/120:05:591
134491570,3ptp4l0-21swapper/000:35:260
134491560,4ptp4l0-21swapper/220:46:472
134491560,16ptp4l0-21swapper/119:40:271
134491550,5ptp4l0-21swapper/021:00:260
134491550,4ptp4l0-21swapper/120:12:271
134491550,3ptp4l24039-21fschecks_time21:20:171
134491550,20ptp4l0-21swapper/119:27:501
134491540,3ptp4l0-21swapper/322:37:413
134491540,3ptp4l0-21swapper/222:30:452
134491540,3ptp4l0-21swapper/120:57:121
134491540,3ptp4l0-21swapper/023:26:280
134491540,13ptp4l0-21swapper/023:55:280
134491530,5ptp4l0-21swapper/022:15:130
134491520,4ptp4l0-21swapper/323:15:573
134491520,4ptp4l0-21swapper/223:09:232
134491520,4ptp4l0-21swapper/223:09:232
134491520,4ptp4l0-21swapper/000:24:310
134491520,12ptp4l0-21swapper/023:05:280
134491520,12ptp4l0-21swapper/023:05:270
134491520,11ptp4l26553-21ls19:05:200
316352510,6sleep3401ktimersoftd/322:45:153
134491500,9ptp4l25743-21df19:05:141
134491500,4ptp4l0-21swapper/122:18:161
134491500,3ptp4l8706-21proc_pri20:45:260
134491490,4ptp4l0-21swapper/120:30:191
134491490,4ptp4l0-21swapper/119:39:301
134491490,4ptp4l0-21swapper/022:58:470
134491480,4ptp4l0-21swapper/223:26:132
134491480,4ptp4l0-21swapper/121:07:201
134491480,4ptp4l0-21swapper/119:17:121
134491480,4ptp4l0-21swapper/023:54:060
134491480,4ptp4l0-21swapper/020:35:500
134491480,4ptp4l0-21swapper/019:15:590
134491480,3ptp4l0-21swapper/019:53:520
134491480,3ptp4l0-21swapper/019:20:580
134491480,11ptp4l0-21swapper/122:52:031
134491470,8ptp4l0-21swapper/200:07:342
134491470,3ptp4l0-21swapper/223:58:132
134491470,3ptp4l0-21swapper/221:51:122
134491470,3ptp4l0-21swapper/100:34:121
134491470,3ptp4l0-21swapper/019:13:580
134491460,7ptp4l0-21swapper/122:45:251
134491460,4ptp4l0-21swapper/121:10:101
134491460,4ptp4l0-21swapper/121:10:101
134491460,3ptp4l0-21swapper/322:19:253
134491460,3ptp4l0-21swapper/021:14:190
134491460,3ptp4l0-21swapper/021:14:190
2792999450,3cyclictest121rcu_preempt20:26:293
2792999450,3cyclictest121rcu_preempt00:34:593
134491450,4ptp4l0-21swapper/222:00:252
134491450,3ptp4l0-21swapper/223:40:302
134491450,3ptp4l0-21swapper/222:44:332
134491450,3ptp4l0-21swapper/022:43:180
134491450,3ptp4l0-21swapper/020:20:230
134491450,3ptp4l0-21swapper/020:05:290
134491450,11ptp4l0-21swapper/220:56:522
2792999441,3cyclictest121rcu_preempt20:53:003
2792999440,2cyclictest121rcu_preempt20:33:073
27927994439,3cyclictest25-21ksoftirqd/120:29:591
134491440,9ptp4l0-21swapper/220:06:502
134491440,4ptp4l0-21swapper/023:02:550
134491440,3ptp4l0-21swapper/219:54:532
134491440,3ptp4l0-21swapper/020:53:420
134491440,3ptp4l0-21swapper/020:26:140
134491440,10ptp4l0-21swapper/122:59:181
2792999432,3cyclictest0-21swapper/321:43:543
2792999430,3cyclictest121rcu_preempt22:22:473
2792999430,3cyclictest121rcu_preempt20:22:203
2792999430,3cyclictest121rcu_preempt19:45:543
2792999430,2cyclictest121rcu_preempt21:33:333
27927994337,3cyclictest25-21ksoftirqd/123:00:131
134491430,9ptp4l0-21swapper/223:15:532
134491430,4ptp4l16724-21ls00:30:220
134491430,4ptp4l0-21swapper/321:55:553
134491430,4ptp4l0-21swapper/321:38:173
134491430,4ptp4l0-21swapper/023:41:580
134491430,2ptp4l17563-21kworker/2:122:53:162
134491430,2ptp4l0-21swapper/319:50:133
134491430,2ptp4l0-21swapper/023:30:270
27929994236,3cyclictest41-21ksoftirqd/320:05:003
2792999421,2cyclictest121rcu_preempt22:09:403
2792999420,3cyclictest121rcu_preempt23:53:263
2792999420,3cyclictest121rcu_preempt19:23:033
27927994237,3cyclictest25-21ksoftirqd/122:25:001
27927994237,3cyclictest25-21ksoftirqd/121:55:011
27927994235,3cyclictest25-21ksoftirqd/121:30:011
134491420,9ptp4l0-21swapper/221:32:422
134491420,9ptp4l0-21swapper/220:31:402
134491420,5ptp4l24174-21apt-get23:40:041
134491420,4ptp4l0-21swapper/323:30:253
134491420,4ptp4l0-21swapper/022:13:410
134491420,3ptp4l0-21swapper/123:45:141
134491420,3ptp4l0-21swapper/000:28:330
134491420,1ptp4l311rcuc/222:25:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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