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2025-12-21 - 09:34
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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 Dec 21, 2025 00:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5827996132,4cyclictest41-21ksoftirqd/319:26:393
5827996124,10cyclictest41-21ksoftirqd/321:10:223
182442610,4sleep30-21swapper/320:45:203
134491600,4ptp4l1980-21iostat23:40:180
134491600,4ptp4l0-21swapper/122:05:211
134491590,4ptp4l0-21swapper/221:00:352
134491590,3ptp4l0-21swapper/200:03:472
134491580,3ptp4l0-21swapper/300:15:293
134491560,3ptp4l0-21swapper/219:15:022
134491560,3ptp4l0-21swapper/020:25:250
134491560,3ptp4l0-21swapper/020:05:220
134491560,3ptp4l0-21swapper/000:05:290
134491550,4ptp4l0-21swapper/023:10:280
134491550,3ptp4l0-21swapper/020:30:200
134491540,4ptp4l0-21swapper/222:20:122
134491540,14ptp4l0-21swapper/200:20:212
5827995310,8cyclictest41-21ksoftirqd/322:50:213
134491530,4ptp4l0-21swapper/321:42:193
134491530,4ptp4l0-21swapper/320:56:563
134491530,3ptp4l0-21swapper/021:25:280
134491530,10ptp4l0-21swapper/021:05:160
5827995217,5cyclictest41-21ksoftirqd/319:45:163
134491520,5ptp4l0-21swapper/119:09:491
134491520,4ptp4l0-21swapper/100:12:341
134491520,3ptp4l0-21swapper/122:25:261
134491520,3ptp4l0-21swapper/122:25:261
134491520,3ptp4l0-21swapper/100:34:551
582799518,10cyclictest41-21ksoftirqd/320:42:223
5827995116,6cyclictest41-21ksoftirqd/323:35:223
134491510,4ptp4l0-21swapper/023:20:040
134491510,4ptp4l0-21swapper/020:48:370
134491510,3ptp4l0-21swapper/221:27:462
134491510,3ptp4l0-21swapper/119:46:191
5827995018,9cyclictest41-21ksoftirqd/322:55:243
5827995018,9cyclictest41-21ksoftirqd/322:55:243
5827995015,9cyclictest41-21ksoftirqd/320:34:593
5827995012,7cyclictest41-21ksoftirqd/321:18:003
134491500,4ptp4l0-21swapper/222:19:302
134491500,4ptp4l0-21swapper/219:56:102
134491500,4ptp4l0-21swapper/119:17:331
134491500,4ptp4l0-21swapper/021:20:220
5827994933,4cyclictest41-21ksoftirqd/323:41:533
5827994912,6cyclictest41-21ksoftirqd/321:02:483
5825994919,7cyclictest25-21ksoftirqd/121:59:591
5825994918,4cyclictest25-21ksoftirqd/120:35:221
134491490,4ptp4l0-21swapper/322:44:263
134491490,4ptp4l0-21swapper/123:07:561
134491490,4ptp4l0-21swapper/120:29:491
134491490,4ptp4l0-21swapper/119:50:031
134491490,4ptp4l0-21swapper/119:50:031
134491490,4ptp4l0-21swapper/119:30:331
134491490,4ptp4l0-21swapper/119:25:371
134491490,4ptp4l0-21swapper/020:59:470
134491490,4ptp4l0-21swapper/019:53:560
134491490,4ptp4l0-21swapper/019:53:560
134491490,4ptp4l0-21swapper/000:28:080
134491490,3ptp4l0-21swapper/221:15:162
134491490,3ptp4l0-21swapper/123:44:231
134491490,3ptp4l0-21swapper/122:34:261
134491490,3ptp4l0-21swapper/022:55:000
582799486,9cyclictest41-21ksoftirqd/319:15:173
5827994834,3cyclictest41-21ksoftirqd/320:54:503
582799483,3cyclictest121rcu_preempt22:49:253
582799483,2cyclictest121rcu_preempt19:10:283
5827994816,4cyclictest41-21ksoftirqd/322:20:263
5826994835,10cyclictest321ktimersoftd/223:50:242
5826994811,7cyclictest33-21ksoftirqd/200:39:212
5825994812,9cyclictest25-21ksoftirqd/122:55:001
134491480,4ptp4l0-21swapper/321:52:033
134491480,4ptp4l0-21swapper/320:27:133
134491480,4ptp4l0-21swapper/120:32:401
134491480,4ptp4l0-21swapper/120:11:571
134491480,4ptp4l0-21swapper/023:05:180
134491480,3ptp4l0-21swapper/100:15:081
5827994737,3cyclictest41-21ksoftirqd/323:55:223
5826994714,4cyclictest33-21ksoftirqd/221:50:002
5825994717,7cyclictest25-21ksoftirqd/122:45:251
134491470,4ptp4l0-21swapper/221:51:512
134491470,4ptp4l0-21swapper/123:26:021
134491470,4ptp4l0-21swapper/021:58:310
134491470,4ptp4l0-21swapper/021:38:060
134491470,4ptp4l0-21swapper/019:12:010
134491470,11ptp4l0-21swapper/120:00:291
5827994610,7cyclictest41-21ksoftirqd/319:59:593
5825994613,4cyclictest25-21ksoftirqd/119:40:161
5825994613,3cyclictest25-21ksoftirqd/121:30:001
134491460,4ptp4l0-21swapper/322:02:133
134491460,4ptp4l0-21swapper/300:24:193
134491460,4ptp4l0-21swapper/123:59:501
134491460,4ptp4l0-21swapper/023:30:390
134491460,4ptp4l0-21swapper/022:24:160
134491460,3ptp4l0-21swapper/123:13:191
134491460,3ptp4l0-21swapper/023:48:190
134491460,3ptp4l0-21swapper/023:36:240
134491460,10ptp4l0-21swapper/020:16:200
582799453,6cyclictest41-21ksoftirqd/319:36:063
5827994533,3cyclictest41-21ksoftirqd/300:12:473
5827994529,13cyclictest41-21ksoftirqd/320:09:583
5827994527,5cyclictest41-21ksoftirqd/323:29:103
5827994515,8cyclictest41-21ksoftirqd/300:05:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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