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2026-05-16 - 15:09
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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 Sat May 16, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1336121610,4sleep313363-21latency_hist19:55:013
2803521250,7sleep02500799cyclictest22:45:150
134491640,5ptp4l27895-21latency_hist23:55:011
134491620,4ptp4l3230-21irqstats23:00:182
134491620,4ptp4l0-21swapper/123:02:481
134491610,17ptp4l10530-21sed19:45:293
134491600,5ptp4l0-21swapper/220:30:142
134491590,3ptp4l0-21swapper/023:50:130
134491590,3ptp4l0-21swapper/000:20:190
134491570,3ptp4l0-21swapper/121:30:141
134491560,3ptp4l0-21swapper/223:40:232
134491560,3ptp4l0-21swapper/223:40:232
134491560,3ptp4l0-21swapper/200:33:392
25007995529,8cyclictest9-21ksoftirqd/000:00:000
134491550,3ptp4l22148-21phc2sys21:20:240
134491550,3ptp4l0-21swapper/222:24:202
134491550,3ptp4l0-21swapper/019:05:170
184002540,4sleep10-21swapper/120:05:131
134491540,6ptp4l0-21swapper/119:05:291
134491540,4ptp4l0-21swapper/221:09:042
134491520,5ptp4l0-21swapper/320:21:003
134491520,4ptp4l0-21swapper/322:55:123
134491520,4ptp4l0-21swapper/221:31:242
134491520,4ptp4l0-21swapper/120:42:031
134491520,3ptp4l20359-21runrttasks22:26:132
134491520,3ptp4l0-21swapper/219:39:472
134491520,3ptp4l0-21swapper/219:15:262
134491520,3ptp4l0-21swapper/219:15:262
134491520,3ptp4l0-21swapper/119:35:211
134491510,4ptp4l0-21swapper/123:59:591
134491510,13ptp4l0-21swapper/120:51:281
134491500,4ptp4l0-21swapper/319:29:183
134491500,4ptp4l0-21swapper/300:22:443
134491500,4ptp4l0-21swapper/022:12:430
134491500,4ptp4l0-21swapper/021:11:360
134491500,4ptp4l0-21swapper/020:54:090
134491500,3ptp4l0-21swapper/122:52:361
134491500,13ptp4l0-21swapper/021:35:200
134491500,10ptp4l0-21swapper/223:46:072
138432490,4sleep20-21swapper/222:15:002
134491490,4ptp4l0-21swapper/300:18:533
134491490,4ptp4l0-21swapper/300:06:133
134491490,4ptp4l0-21swapper/221:19:062
134491490,4ptp4l0-21swapper/219:53:112
134491490,4ptp4l0-21swapper/219:14:432
134491490,4ptp4l0-21swapper/200:26:392
134491490,4ptp4l0-21swapper/123:44:451
134491490,4ptp4l0-21swapper/123:44:441
134491490,4ptp4l0-21swapper/122:57:481
134491490,4ptp4l0-21swapper/121:46:221
134491490,4ptp4l0-21swapper/100:36:511
134491490,4ptp4l0-21swapper/019:25:160
134491490,3ptp4l0-21swapper/000:11:380
134491480,7ptp4l33-21ksoftirqd/223:51:152
134491480,4ptp4l0-21swapper/220:58:582
134491480,4ptp4l0-21swapper/123:28:371
134491480,4ptp4l0-21swapper/122:04:021
134491480,4ptp4l0-21swapper/121:29:081
134491480,4ptp4l0-21swapper/100:09:511
134491480,3ptp4l0-21swapper/322:31:523
134491480,3ptp4l0-21swapper/200:16:512
134491480,3ptp4l0-21swapper/200:02:292
134491470,4ptp4l0-21swapper/322:06:343
134491470,4ptp4l0-21swapper/320:38:143
134491470,4ptp4l0-21swapper/120:48:491
134491470,4ptp4l0-21swapper/023:13:020
134491470,4ptp4l0-21swapper/023:13:020
134491470,3ptp4l0-21swapper/100:16:171
134491460,4ptp4l0-21swapper/020:41:160
134491460,3ptp4l0-21swapper/119:57:061
134491460,10ptp4l0-21swapper/020:14:210
134491450,4ptp4l0-21swapper/120:38:441
134491450,4ptp4l0-21swapper/120:20:521
134491450,3ptp4l0-21swapper/319:40:233
134491450,12ptp4l0-21swapper/222:55:192
134491450,10ptp4l0-21swapper/122:19:151
2501099441,40cyclictest14845-21uname22:15:203
134491440,9ptp4l0-21swapper/023:17:100
134491440,5ptp4l0-21swapper/023:45:270
134491440,4ptp4l12151-21apt-get00:30:113
134491440,4ptp4l0-21swapper/222:39:562
134491440,3ptp4l0-21swapper/121:18:431
134491440,3ptp4l0-21swapper/120:33:441
134491440,3ptp4l0-21swapper/100:30:291
134491430,9ptp4l0-21swapper/223:07:102
134491430,8ptp4l0-21swapper/200:38:232
134491430,6ptp4l5383-21/usr/sbin/munin19:35:223
134491430,4ptp4l4952-21apt-get23:05:101
134491430,4ptp4l25524-21apt-get22:40:133
134491430,4ptp4l0-21swapper/321:46:583
134491430,4ptp4l0-21swapper/021:55:140
134491430,3ptp4l11865-21apt-get23:20:122
134491430,3ptp4l0-21swapper/219:22:292
134491430,10ptp4l0-21swapper/221:10:462
134491420,9ptp4l0-21swapper/221:59:322
134491420,9ptp4l0-21swapper/219:41:242
134491420,8ptp4l0-21swapper/222:40:262
134491420,8ptp4l0-21swapper/219:56:242
134491420,6ptp4l15726-21find00:35:263
134491420,5ptp4l0-21swapper/019:55:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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