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2026-04-02 - 00:15
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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 Wed Apr 01, 2026 12:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491610,4ptp4l15260-21/usr/sbin/munin10:25:200
134491600,5ptp4l0-21swapper/209:15:232
134491600,3ptp4l0-21swapper/109:00:181
134491590,10ptp4l18866-21iostat_ios07:05:180
134491580,4ptp4l21979-21mailstats07:10:250
134491570,4ptp4l0-21swapper/312:16:083
134491570,3ptp4l0-21swapper/009:30:250
134491560,3ptp4l0-21swapper/311:51:253
134491560,3ptp4l0-21swapper/110:45:261
134491550,4ptp4l0-21swapper/312:36:323
134491550,4ptp4l0-21swapper/008:00:020
134491550,3ptp4l0-21swapper/207:45:132
134491550,13ptp4l0-21swapper/012:25:210
134491540,6ptp4l0-21swapper/107:08:001
134491540,4ptp4l0-21swapper/011:13:480
134491530,4ptp4l0-21swapper/011:09:570
134491520,4ptp4l0-21swapper/107:36:081
134491520,3ptp4l0-21swapper/010:20:150
134491520,3ptp4l0-21swapper/009:48:180
134491520,3ptp4l0-21swapper/007:25:530
134491510,4ptp4l0-21swapper/308:14:053
134491510,4ptp4l0-21swapper/012:22:450
134491510,4ptp4l0-21swapper/011:36:290
134491510,4ptp4l0-21swapper/010:50:170
134491510,3ptp4l0-21swapper/210:24:112
134491510,3ptp4l0-21swapper/008:45:260
134491500,4ptp4l0-21swapper/309:23:403
134491500,4ptp4l0-21swapper/110:59:261
134491500,3ptp4l0-21swapper/011:20:230
134491490,5ptp4l33-21ksoftirqd/208:42:232
134491490,4ptp4l0-21swapper/211:51:422
134491490,4ptp4l0-21swapper/209:14:102
134491490,4ptp4l0-21swapper/010:40:570
134491490,4ptp4l0-21swapper/007:18:130
134491490,3ptp4l0-21swapper/011:41:310
2062899481,3cyclictest121rcu_preempt08:39:033
134491480,4ptp4l0-21swapper/208:25:232
134491480,4ptp4l0-21swapper/109:33:211
134491480,4ptp4l0-21swapper/107:22:011
134491480,4ptp4l0-21swapper/009:50:580
134491480,3ptp4l0-21swapper/210:55:282
134491480,3ptp4l0-21swapper/210:12:422
134491480,12ptp4l0-21swapper/207:50:072
134491470,4ptp4l20834-21apt-get08:20:132
134491470,4ptp4l0-21swapper/309:57:003
134491470,4ptp4l0-21swapper/308:06:193
134491470,4ptp4l0-21swapper/109:12:531
134491470,4ptp4l0-21swapper/011:16:260
134491470,3ptp4l0-21swapper/211:47:302
134491470,3ptp4l0-21swapper/208:49:192
134491460,4ptp4l0-21swapper/208:17:462
134491460,4ptp4l0-21swapper/007:32:250
134491460,3ptp4l0-21swapper/308:20:193
134491460,3ptp4l0-21swapper/212:22:542
134491460,3ptp4l0-21swapper/212:09:202
134491460,12ptp4l15219-21fschecks_time11:35:161
2062899452,2cyclictest121rcu_preempt07:41:463
2062899452,2cyclictest121rcu_preempt07:41:463
2062899450,3cyclictest121rcu_preempt12:07:563
2062899450,2cyclictest121rcu_preempt12:30:593
20626994539,3cyclictest25-21ksoftirqd/110:20:011
134491450,9ptp4l0-21swapper/210:29:562
134491450,5ptp4l0-21swapper/209:35:122
134491450,4ptp4l0-21swapper/310:16:263
134491450,4ptp4l0-21swapper/110:04:581
134491450,4ptp4l0-21swapper/008:30:140
134491450,3ptp4l0-21swapper/308:40:513
134491450,3ptp4l0-21swapper/110:31:441
134491450,3ptp4l0-21swapper/012:30:170
134491450,11ptp4l0-21swapper/109:29:471
134491450,10ptp4l0-21swapper/212:28:542
134491450,10ptp4l0-21swapper/009:23:210
2062899441,3cyclictest121rcu_preempt10:48:243
2062899441,3cyclictest121rcu_preempt10:12:473
2062899440,2cyclictest121rcu_preempt08:02:013
134491440,9ptp4l0-21swapper/211:10:462
134491440,9ptp4l0-21swapper/111:48:201
134491440,4ptp4l0-21swapper/307:26:123
134491440,4ptp4l0-21swapper/208:57:352
134491440,4ptp4l0-21swapper/207:58:492
134491440,4ptp4l0-21swapper/009:38:310
134491440,10ptp4l0-21swapper/308:34:123
134491440,10ptp4l0-21swapper/112:11:311
134491440,10ptp4l0-21swapper/112:11:311
2062899431,3cyclictest121rcu_preempt10:32:483
2062899430,3cyclictest121rcu_preempt11:14:283
2062899430,3cyclictest121rcu_preempt09:03:313
2062899430,2cyclictest121rcu_preempt11:09:363
134491430,9ptp4l0-21swapper/211:25:342
134491430,4ptp4l0-21swapper/308:26:393
134491430,4ptp4l0-21swapper/208:39:412
134491430,4ptp4l0-21swapper/008:50:320
134491430,2ptp4l12922-21memory09:10:210
134491430,10ptp4l0-21swapper/008:20:380
2062899421,3cyclictest121rcu_preempt07:21:323
2062899421,2cyclictest121rcu_preempt09:29:453
2062899420,2cyclictest121rcu_preempt07:54:313
134491420,9ptp4l0-21swapper/211:02:262
134491420,9ptp4l0-21swapper/209:41:192
134491420,9ptp4l0-21swapper/209:30:342
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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