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2026-08-21 - 00:13
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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 Thu Aug 20, 2026 12:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1689721690,5sleep11418099cyclictest08:25:111
2250121170,3sleep21418199cyclictest09:45:202
134491750,7ptp4l121rcu_preempt11:05:013
134491750,7ptp4l121rcu_preempt11:05:013
134491680,3ptp4l121rcu_preempt09:50:173
134491680,3ptp4l121rcu_preempt08:50:293
134491620,4ptp4l0-21swapper/210:30:282
134491620,19ptp4l0-21swapper/311:30:263
134691600,5getstats0-21swapper/107:05:041
134491600,3ptp4l0-21swapper/208:35:282
134491590,3ptp4l0-21swapper/210:57:542
134491590,3ptp4l0-21swapper/010:35:300
134491590,2ptp4l9921-21apt-get09:20:123
134491580,4ptp4l0-21swapper/311:20:393
134491580,4ptp4l0-21swapper/207:16:362
134491580,18ptp4l0-21swapper/312:17:293
134491570,4ptp4l0-21swapper/209:52:402
134491570,4ptp4l0-21swapper/010:20:120
134491570,3ptp4l0-21swapper/211:15:072
134491570,3ptp4l0-21swapper/209:02:532
134491570,3ptp4l0-21swapper/207:35:272
134691560,3getstats0-21swapper/311:40:093
134491560,3ptp4l0-21swapper/312:10:303
134491560,3ptp4l0-21swapper/307:50:193
1417999556,7cyclictest0-21swapper/008:55:140
134491550,5ptp4l0-21swapper/312:28:473
134491550,3ptp4l0-21swapper/211:44:402
306032540,5sleep10-21swapper/112:20:241
14181995418,3cyclictest33-21ksoftirqd/210:35:212
1418099546,11cyclictest25551-21chrt08:43:251
1417999544,6cyclictest0-21swapper/012:35:260
1417999544,6cyclictest0-21swapper/012:35:260
134491540,4ptp4l0-21swapper/211:49:502
134491540,4ptp4l0-21swapper/211:27:042
134491540,3ptp4l0-21swapper/212:25:212
134491540,3ptp4l0-21swapper/012:10:130
134491540,12ptp4l0-21swapper/307:30:443
134491530,5ptp4l0-21swapper/007:05:050
134491530,4ptp4l0-21swapper/310:58:233
134491530,4ptp4l0-21swapper/308:29:183
134491530,4ptp4l0-21swapper/210:17:502
134491530,4ptp4l0-21swapper/210:07:462
134491530,3ptp4l0-21swapper/209:44:522
134491530,3ptp4l0-21swapper/208:51:142
134491530,2ptp4l0-21swapper/309:42:063
1418099526,12cyclictest30481-21taskset11:11:011
1418099521,12cyclictest4331-21cat09:05:281
134491520,4ptp4l0-21swapper/210:53:302
134491520,10ptp4l0-21swapper/307:58:303
1418099518,7cyclictest0-21swapper/111:35:161
1418099518,10cyclictest21231-21seq10:50:301
1418099512,16cyclictest722-21sendmail-msp11:20:001
1417999515,6cyclictest0-21swapper/007:40:120
134491510,3ptp4l0-21swapper/310:54:433
134491510,3ptp4l0-21swapper/307:37:323
1418099506,11cyclictest19572-21chrt11:58:581
1417999507,6cyclictest9-21ksoftirqd/011:25:240
1417999506,10cyclictest0-21swapper/008:52:060
134491500,3ptp4l0-21swapper/212:07:512
1418199493,3cyclictest121rcu_preempt12:12:062
1418099495,6cyclictest1661-21processes09:00:241
1418099494,10cyclictest0-21swapper/108:46:201
1417999492,6cyclictest0-21swapper/011:15:110
14179994917,6cyclictest9-21ksoftirqd/008:27:590
134491490,4ptp4l0-21swapper/011:02:320
134491490,4ptp4l0-21swapper/011:02:320
134491490,3ptp4l0-21swapper/212:15:342
134491490,3ptp4l0-21swapper/208:46:372
134491490,3ptp4l0-21swapper/208:22:472
1418199483,2cyclictest121rcu_preempt09:39:362
1418099488,6cyclictest0-21swapper/107:32:461
1418099487,6cyclictest0-21swapper/111:50:181
1418099487,12cyclictest25480-21seq09:50:401
1418099486,11cyclictest9565-21taskset10:29:431
1418099486,11cyclictest9565-21taskset10:29:431
1417999485,10cyclictest0-21swapper/010:34:510
1417999484,6cyclictest0-21swapper/010:00:230
1417999481,5cyclictest0-21swapper/009:50:110
134491480,3ptp4l0-21swapper/307:41:463
14181994735,9cyclictest33-21ksoftirqd/209:20:152
1418199472,2cyclictest121rcu_preempt08:56:202
1418099478,5cyclictest25-21ksoftirqd/107:10:231
1417999473,8cyclictest0-21swapper/010:19:210
1417999472,7cyclictest134491ptp4l09:35:240
134491470,5ptp4l2318-21gnome-shell10:05:593
134491470,4ptp4l0-21swapper/212:32:072
134491470,4ptp4l0-21swapper/210:49:432
134491470,4ptp4l0-21swapper/207:26:452
134491470,3ptp4l0-21swapper/210:42:382
1418099468,11cyclictest0-21swapper/107:50:231
1418099467,6cyclictest0-21swapper/107:37:481
1418099467,6cyclictest0-21swapper/107:15:181
1418099466,12cyclictest23572-21runrttasks10:55:591
1418099465,7cyclictest0-21swapper/109:20:261
1418099464,11cyclictest8447-21missed_timers08:05:221
1417999464,6cyclictest0-21swapper/008:35:250
1417999464,6cyclictest0-21swapper/008:10:280
1417999463,6cyclictest9-21ksoftirqd/008:05:210
1417999462,6cyclictest0-21swapper/012:19:570
1417999461,7cyclictest101ktimersoftd/011:10:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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