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2026-07-24 - 09:21
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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 Jul 24, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1314221460,6sleep12563899cyclictest21:00:211
2563899708,24cyclictest134491ptp4l21:30:261
265132680,3sleep20-21swapper/219:10:182
25637996227,5cyclictest9-21ksoftirqd/023:45:000
2563899610,24cyclictest26166-21if_enp1s019:10:161
25637996131,6cyclictest9-21ksoftirqd/020:05:180
134491600,4ptp4l0-21swapper/221:30:292
134491600,4ptp4l0-21swapper/022:00:450
134491600,17ptp4l0-21swapper/220:15:162
25637995930,4cyclictest9-21ksoftirqd/019:55:200
25637995927,6cyclictest9-21ksoftirqd/022:55:170
25637995826,7cyclictest9-21ksoftirqd/021:00:260
25637995825,5cyclictest9-21ksoftirqd/000:30:140
134491580,4ptp4l0-21swapper/121:58:031
134491580,3ptp4l0-21swapper/320:55:313
134491580,3ptp4l0-21swapper/019:06:270
25637995624,5cyclictest9-21ksoftirqd/019:45:000
25637995621,5cyclictest9-21ksoftirqd/019:50:280
25637995618,4cyclictest9-21ksoftirqd/019:45:160
25637995618,4cyclictest9-21ksoftirqd/019:45:160
25637995616,7cyclictest9-21ksoftirqd/020:10:260
134491560,4ptp4l0-21swapper/322:20:123
134491560,4ptp4l0-21swapper/219:51:232
134491560,3ptp4l0-21swapper/319:59:203
134491560,3ptp4l0-21swapper/122:17:251
134491560,3ptp4l0-21swapper/119:25:231
134491560,3ptp4l0-21swapper/023:45:150
25637995526,4cyclictest9-21ksoftirqd/023:25:260
25637995521,4cyclictest9-21ksoftirqd/022:14:070
134491550,4ptp4l0-21swapper/220:21:362
134491550,4ptp4l0-21swapper/200:31:122
134491550,4ptp4l0-21swapper/122:25:411
134491550,4ptp4l0-21swapper/121:27:041
134491550,3ptp4l0-21swapper/222:21:392
25637995427,4cyclictest9-21ksoftirqd/023:35:170
25637995424,5cyclictest9-21ksoftirqd/019:15:280
25637995420,5cyclictest9-21ksoftirqd/020:44:130
25637995419,6cyclictest9-21ksoftirqd/022:15:300
25637995419,6cyclictest9-21ksoftirqd/019:20:180
25637995418,4cyclictest9-21ksoftirqd/023:30:140
25637995417,3cyclictest9-21ksoftirqd/021:50:240
25637995417,3cyclictest9-21ksoftirqd/021:50:240
25637995416,6cyclictest9-21ksoftirqd/019:25:190
134491540,4ptp4l2563899cyclictest00:05:161
134491540,4ptp4l0-21swapper/200:14:332
134491540,3ptp4l0-21swapper/000:17:430
2563799534,5cyclictest121rcu_preempt21:00:000
25637995323,6cyclictest9-21ksoftirqd/000:20:180
25637995321,6cyclictest9-21ksoftirqd/021:25:270
25637995320,6cyclictest9-21ksoftirqd/019:15:000
134491530,5ptp4l0-21swapper/221:13:132
134491530,4ptp4l0-21swapper/222:52:212
134491530,3ptp4l0-21swapper/219:35:232
134491530,3ptp4l0-21swapper/100:28:181
2563899520,50cyclictest5203-21kworker/1:223:22:291
25637995223,4cyclictest9-21ksoftirqd/021:31:130
25637995218,5cyclictest9-21ksoftirqd/023:10:000
25637995216,6cyclictest9-21ksoftirqd/020:45:240
134491520,4ptp4l0-21swapper/221:26:112
134491520,3ptp4l9058-21processes23:10:262
25637995125,6cyclictest9-21ksoftirqd/020:35:270
25637995123,3cyclictest9-21ksoftirqd/022:25:180
25637995112,5cyclictest9-21ksoftirqd/020:15:220
134491510,4ptp4l0-21swapper/223:17:032
134491510,4ptp4l0-21swapper/222:14:582
134491510,4ptp4l0-21swapper/023:59:540
134491510,3ptp4l0-21swapper/223:28:552
134491510,3ptp4l0-21swapper/122:43:401
134491510,3ptp4l0-21swapper/122:08:261
25637995023,3cyclictest9-21ksoftirqd/021:44:290
25637995021,6cyclictest9-21ksoftirqd/000:40:000
25637995020,8cyclictest9-21ksoftirqd/020:28:080
25637995015,6cyclictest9-21ksoftirqd/000:00:240
25637995010,6cyclictest9-21ksoftirqd/000:10:270
134491500,4ptp4l0-21swapper/123:56:461
25639994937,3cyclictest33-21ksoftirqd/221:45:202
2563799492,6cyclictest9-21ksoftirqd/021:15:250
25637994920,9cyclictest9-21ksoftirqd/022:42:270
25637994920,8cyclictest9-21ksoftirqd/022:08:410
2563799491,2cyclictest121rcu_preempt22:40:000
134491490,9ptp4l0-21swapper/320:25:233
134491490,5ptp4l0-21swapper/119:05:311
134491490,3ptp4l0-21swapper/021:09:200
2563899481,45cyclictest21939-21kworker/1:122:51:091
25637994818,5cyclictest9-21ksoftirqd/021:45:280
134491480,4ptp4l0-21swapper/220:40:482
134491480,4ptp4l0-21swapper/219:23:422
134491480,4ptp4l0-21swapper/000:27:540
134491480,3ptp4l0-21swapper/123:52:451
25639994735,9cyclictest33-21ksoftirqd/219:25:292
25639994717,13cyclictest33-21ksoftirqd/221:00:002
2563799473,1cyclictest0-21swapper/023:55:000
2563799472,3cyclictest121rcu_preempt20:34:590
25637994723,6cyclictest9-21ksoftirqd/020:03:140
25637994717,4cyclictest9-21ksoftirqd/022:50:200
134491470,8ptp4l0-21swapper/321:23:263
134491470,7ptp4l0-21swapper/320:45:243
134491470,6ptp4l0-21swapper/023:10:210
134491470,4ptp4l0-21swapper/223:22:112
25639994634,10cyclictest33-21ksoftirqd/219:55:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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