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2026-08-05 - 01:20
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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 Tue Aug 04, 2026 12:45:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2841021740,3sleep12577199cyclictest09:35:131
3267821520,5sleep22577299cyclictest10:50:242
2494321420,6sleep02577099cyclictest08:15:280
134491700,4ptp4l11788-21ntp_states12:25:232
134491670,3ptp4l0-21swapper/212:35:592
134491640,4ptp4l5426-21users12:10:282
2577399628,8cyclictest0-21swapper/310:25:223
2577399627,7cyclictest0-21swapper/311:10:233
134491610,3ptp4l10018-21df_inode08:55:162
2577399609,7cyclictest0-21swapper/310:30:153
134491600,4ptp4l0-21swapper/210:20:212
134491600,3ptp4l29470-21df10:45:132
2577399591,10cyclictest28190-21perf09:35:003
2577399576,6cyclictest0-21swapper/309:20:223
2577399573,16cyclictest22407-21cpuspeed_turbos11:40:153
134491570,5ptp4l0-21swapper/210:40:232
134491570,5ptp4l0-21swapper/107:09:381
134491570,5ptp4l0-21swapper/007:14:390
134491560,4ptp4l0-21swapper/207:32:232
134491560,4ptp4l0-21swapper/207:18:232
134491560,3ptp4l0-21swapper/309:41:263
134491560,3ptp4l0-21swapper/211:55:262
134491560,3ptp4l0-21swapper/207:35:202
134491550,5ptp4l0-21swapper/007:07:200
134491550,4ptp4l0-21swapper/211:46:352
2577399540,11cyclictest1623-21mailstats07:25:263
134491530,4ptp4l0-21swapper/209:52:472
134491530,4ptp4l0-21swapper/207:20:592
2577399526,7cyclictest0-21swapper/311:55:173
2577399526,6cyclictest0-21swapper/307:35:193
134491520,5ptp4l0-21swapper/209:47:432
134491520,4ptp4l0-21swapper/212:32:142
134491520,4ptp4l0-21swapper/211:33:172
134491520,4ptp4l0-21swapper/211:23:192
134491520,4ptp4l0-21swapper/211:07:402
134491520,4ptp4l0-21swapper/209:02:462
134491520,4ptp4l0-21swapper/209:02:462
134491520,4ptp4l0-21swapper/011:29:370
134491520,3ptp4l0-21swapper/209:42:342
2577399516,5cyclictest7159-21sed11:05:223
134491510,4ptp4l0-21swapper/211:39:412
134491510,4ptp4l0-21swapper/211:27:022
134491510,4ptp4l0-21swapper/208:35:232
134491510,4ptp4l0-21swapper/108:52:301
134491510,3ptp4l0-21swapper/210:59:512
134491510,3ptp4l0-21swapper/208:29:542
134491510,12ptp4l0-21swapper/208:47:182
52582500,3sleep10-21swapper/108:45:141
2577399508,6cyclictest0-21swapper/307:20:223
2577399502,6cyclictest16348-21cat10:15:273
134491500,5ptp4l0-21swapper/210:12:062
134491500,4ptp4l0-21swapper/208:01:262
134491500,4ptp4l0-21swapper/207:45:512
134491500,4ptp4l0-21swapper/107:47:481
134491490,4ptp4l0-21swapper/209:07:362
2577399487,6cyclictest0-21swapper/311:35:253
2577399487,6cyclictest0-21swapper/309:35:173
2577399486,7cyclictest0-21swapper/310:45:183
2577399482,6cyclictest2002-21phc2sys09:45:233
2577099485,3cyclictest9-21ksoftirqd/009:55:000
134491480,4ptp4l0-21swapper/208:43:082
134491480,3ptp4l0-21swapper/210:27:532
134491480,3ptp4l0-21swapper/209:14:542
2577399478,6cyclictest0-21swapper/307:40:183
2577399477,6cyclictest0-21swapper/312:35:253
2577399477,6cyclictest0-21swapper/307:52:393
2577399476,7cyclictest0-21swapper/310:50:253
2577399476,7cyclictest0-21swapper/310:10:183
2577399472,5cyclictest0-21swapper/308:18:293
2577099476,3cyclictest121rcu_preempt11:35:000
2577099474,2cyclictest121rcu_preempt09:00:150
2577099474,2cyclictest121rcu_preempt09:00:150
134491470,4ptp4l16544-21apt-get08:00:143
134491470,4ptp4l0-21swapper/212:05:352
134491470,4ptp4l0-21swapper/211:00:592
134491470,4ptp4l0-21swapper/209:55:252
134491470,3ptp4l0-21swapper/208:53:532
2577399467,6cyclictest0-21swapper/310:20:193
2577399467,6cyclictest0-21swapper/308:10:193
2577399462,10cyclictest0-21swapper/311:17:363
2577099463,3cyclictest121rcu_preempt12:35:000
134491460,9ptp4l0-21swapper/009:14:380
134491460,3ptp4l0-21swapper/209:25:182
134491460,3ptp4l0-21swapper/207:10:452
2577399457,6cyclictest0-21swapper/311:50:153
2577399457,6cyclictest0-21swapper/307:45:163
2577399455,6cyclictest0-21swapper/311:00:153
2577399452,7cyclictest0-21swapper/312:00:273
2577399451,5cyclictest0-21swapper/310:08:103
2577399451,11cyclictest0-21swapper/309:59:443
25771994531,4cyclictest25-21ksoftirqd/111:01:001
2577199452,3cyclictest121rcu_preempt11:54:591
2577099454,3cyclictest9-21ksoftirqd/009:25:280
134491450,9ptp4l0-21swapper/009:19:000
134491450,6ptp4l9-21ksoftirqd/007:46:360
134491450,4ptp4l3756-21apt-get12:10:131
134491450,4ptp4l0-21swapper/209:20:012
2577399445,6cyclictest0-21swapper/310:00:173
2577099443,3cyclictest121rcu_preempt10:15:010
134491440,5ptp4l0-21swapper/010:25:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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