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2026-05-17 - 03:53
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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 May 17, 2026 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1865799763,31cyclictest0-21swapper/223:25:232
134491720,3ptp4l0-21swapper/120:44:561
134491700,22ptp4l17507-21/usr/sbin/munin22:35:160
1865799683,30cyclictest0-21swapper/222:50:152
134491660,5ptp4l4062-21phc2sys-jitter20:55:251
18657996535,6cyclictest33-21ksoftirqd/222:15:192
18657996531,9cyclictest33-21ksoftirqd/220:15:002
18657996531,9cyclictest33-21ksoftirqd/220:15:002
18657996128,4cyclictest33-21ksoftirqd/223:40:262
134491610,5ptp4l0-21swapper/220:29:002
101332610,5sleep11865699cyclictest21:10:161
134491590,3ptp4l0-21swapper/320:17:143
134491580,4ptp4l0-21swapper/021:07:580
134491580,3ptp4l0-21swapper/123:32:471
18657995723,5cyclictest33-21ksoftirqd/223:20:222
134491570,4ptp4l0-21swapper/323:07:423
134491560,5ptp4l1865599cyclictest00:10:580
134491560,3ptp4l0-21swapper/322:43:063
18657995511,2cyclictest121rcu_preempt20:20:012
134491550,4ptp4l0-21swapper/321:10:223
134491550,4ptp4l0-21swapper/022:50:140
134491550,4ptp4l0-21swapper/021:42:330
134491550,3ptp4l0-21swapper/220:45:202
134491550,2ptp4l22453-21ls21:35:201
1865799545,8cyclictest33-21ksoftirqd/200:10:252
18657995446,6cyclictest0-21swapper/223:15:272
18657995446,6cyclictest0-21swapper/223:15:272
18657995422,7cyclictest33-21ksoftirqd/223:05:302
134491540,5ptp4l0-21swapper/020:33:160
134491540,4ptp4l0-21swapper/020:54:070
134491540,3ptp4l0-21swapper/020:12:120
134491540,3ptp4l0-21swapper/020:12:120
18657995317,4cyclictest33-21ksoftirqd/220:40:132
134491530,4ptp4l15185-21irqrtprio22:30:181
134491530,4ptp4l0-21swapper/023:02:460
134491530,3ptp4l0-21swapper/322:14:023
1865799525,7cyclictest33-21ksoftirqd/220:25:012
1865799525,6cyclictest33-21ksoftirqd/219:15:222
1865799525,4cyclictest33-21ksoftirqd/200:30:012
1865799524,8cyclictest33-21ksoftirqd/221:40:002
1865799524,7cyclictest33-21ksoftirqd/222:30:182
18657995244,6cyclictest0-21swapper/222:35:262
1865799522,7cyclictest0-21swapper/223:35:142
1865799520,6cyclictest0-21swapper/200:00:222
134491520,4ptp4l0-21swapper/121:00:451
134491520,3ptp4l0-21swapper/120:30:361
1865799515,5cyclictest33-21ksoftirqd/200:05:272
1865799514,9cyclictest33-21ksoftirqd/221:00:222
1865799514,5cyclictest33-21ksoftirqd/220:30:152
1865799513,7cyclictest33-21ksoftirqd/220:05:262
1865799511,6cyclictest0-21swapper/220:00:222
1865799511,5cyclictest0-21swapper/221:20:272
134491510,5ptp4l0-21swapper/219:07:272
134491510,4ptp4l0-21swapper/323:22:323
134491510,4ptp4l0-21swapper/021:33:000
134491510,4ptp4l0-21swapper/019:17:500
134491510,4ptp4l0-21swapper/019:10:580
134491510,3ptp4l0-21swapper/000:02:130
1865799505,9cyclictest33-21ksoftirqd/221:25:142
1865799504,6cyclictest0-21swapper/200:35:292
1865799504,5cyclictest33-21ksoftirqd/221:45:212
1865799504,5cyclictest33-21ksoftirqd/220:40:002
1865799504,5cyclictest33-21ksoftirqd/219:55:162
1865799504,5cyclictest33-21ksoftirqd/219:45:132
1865799504,5cyclictest33-21ksoftirqd/219:30:292
1865799504,3cyclictest121rcu_preempt22:05:252
1865799502,7cyclictest0-21swapper/219:35:152
1865799502,6cyclictest33-21ksoftirqd/223:49:592
1865799502,6cyclictest33-21ksoftirqd/221:15:242
1865799502,6cyclictest0-21swapper/222:26:292
1865799501,5cyclictest0-21swapper/221:40:172
1865799500,6cyclictest33-21ksoftirqd/221:50:232
1865799500,6cyclictest33-21ksoftirqd/220:50:152
134491500,4ptp4l0-21swapper/323:45:153
134491500,4ptp4l0-21swapper/323:39:573
134491500,4ptp4l0-21swapper/319:23:313
134491500,4ptp4l0-21swapper/319:23:313
134491500,4ptp4l0-21swapper/122:55:141
134491500,4ptp4l0-21swapper/119:58:571
134491500,4ptp4l0-21swapper/100:04:581
134491500,4ptp4l0-21swapper/000:16:290
134491500,3ptp4l212-21systemd-journal00:14:591
1865799493,6cyclictest33-21ksoftirqd/222:40:252
1865799492,7cyclictest0-21swapper/223:50:242
1865799492,6cyclictest0-21swapper/223:00:152
1865799492,11cyclictest0-21swapper/219:25:182
1865799491,6cyclictest33-21ksoftirqd/222:20:182
1865799490,7cyclictest33-21ksoftirqd/223:10:152
1865799490,6cyclictest33-21ksoftirqd/200:15:292
1865799490,6cyclictest0-21swapper/219:40:262
134491490,4ptp4l0-21swapper/220:57:542
134491490,4ptp4l0-21swapper/121:50:001
134491490,4ptp4l0-21swapper/100:26:471
134491490,4ptp4l0-21swapper/100:08:481
134491490,4ptp4l0-21swapper/023:51:470
134491490,4ptp4l0-21swapper/022:16:070
134491490,4ptp4l0-21swapper/022:00:560
134491490,3ptp4l0-21swapper/300:32:293
134491490,3ptp4l0-21swapper/123:17:461
134491490,3ptp4l0-21swapper/123:17:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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