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2026-04-23 - 19:19
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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 Apr 23, 2026 12:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
162232760,5sleep20-21swapper/207:30:242
569299743,3cyclictest0-21swapper/209:55:142
134491710,4ptp4l0-21swapper/007:39:540
255792690,6sleep1569199cyclictest12:30:131
102832620,3sleep20-21swapper/211:55:202
134491610,25ptp4l25-21ksoftirqd/110:45:221
134491610,18ptp4l13580-21latency_hist10:55:000
134491600,4ptp4l0-21swapper/310:20:243
134491600,4ptp4l0-21swapper/307:12:443
134491600,4ptp4l0-21swapper/307:12:443
134491590,4ptp4l0-21swapper/108:45:191
134491580,3ptp4l0-21swapper/108:50:251
134491570,3ptp4l0-21swapper/312:17:213
134491570,3ptp4l0-21swapper/310:00:163
134491560,4ptp4l0-21swapper/009:44:000
134491550,4ptp4l0-21swapper/008:16:390
134491550,4ptp4l0-21swapper/007:48:360
134491550,3ptp4l0-21swapper/208:11:572
134491540,4ptp4l0-21swapper/012:15:160
134491540,3ptp4l0-21swapper/212:00:012
134491530,4ptp4l0-21swapper/011:23:570
134491530,4ptp4l0-21swapper/009:55:030
134491520,3ptp4l0-21swapper/008:29:550
134491520,2ptp4l0-21swapper/010:19:500
134491500,4ptp4l569099cyclictest08:00:270
134491500,3ptp4l0-21swapper/012:25:140
569299491,3cyclictest18248-21hddtemp_smartct08:45:172
134491490,5ptp4l0-21swapper/107:05:401
134491490,5ptp4l0-21swapper/007:05:120
134491490,3ptp4l0-21swapper/011:25:240
134491480,8ptp4l0-21swapper/311:05:073
134491480,4ptp4l0-21swapper/211:09:012
134491480,3ptp4l121rcu_preempt07:57:143
134491480,3ptp4l0-21swapper/007:20:230
134491480,10ptp4l0-21swapper/012:20:140
5692994729,15cyclictest33-21ksoftirqd/210:05:112
134691470,12getstats0-21swapper/109:09:271
134491470,4ptp4l23164-21apt-get12:25:122
134491470,4ptp4l0-21swapper/011:46:590
134491470,3ptp4l0-21swapper/209:05:062
5693994641,3cyclictest17575-21cron08:45:013
134491460,5ptp4l0-21swapper/308:05:203
134491460,5ptp4l0-21swapper/107:45:181
134491460,4ptp4l0-21swapper/208:50:042
134491460,4ptp4l0-21swapper/108:03:591
134491460,3ptp4l0-21swapper/212:21:082
134491460,3ptp4l0-21swapper/211:51:372
134491460,3ptp4l0-21swapper/109:34:091
5692994527,16cyclictest33-21ksoftirqd/211:20:112
134491450,5ptp4l0-21swapper/308:35:193
134491450,4ptp4l16193-21apt-get12:10:100
134491450,4ptp4l0-21swapper/007:10:250
134491450,4ptp4l0-21swapper/007:10:250
134491450,3ptp4l0-21swapper/308:53:163
134491450,3ptp4l0-21swapper/111:23:321
134491450,3ptp4l0-21swapper/108:43:421
134491440,9ptp4l0-21swapper/108:25:161
134491440,5ptp4l0-21swapper/309:20:213
134491440,5ptp4l0-21swapper/008:05:150
134491440,4ptp4l2318-21gnome-shell11:42:590
134491440,4ptp4l0-21swapper/010:08:380
134491440,4ptp4l0-21swapper/007:50:290
134491440,3ptp4l0-21swapper/207:24:282
569299431,4cyclictest16990-21ntp_states09:50:232
46198430,4rtkit-daemon0-21swapper/009:29:510
134491430,9ptp4l0-21swapper/112:14:191
134491430,7ptp4l2325-21llvmpipe-210:41:590
134491430,6ptp4l1301-21snmpd07:37:353
134491430,5ptp4l8578-21/usr/sbin/munin07:15:190
134491430,5ptp4l18025-21df08:45:140
134491430,5ptp4l0-21swapper/310:30:133
134491430,5ptp4l0-21swapper/309:45:233
134491430,5ptp4l0-21swapper/308:10:203
134491430,5ptp4l0-21swapper/210:20:202
134491430,5ptp4l0-21swapper/011:10:100
134491430,5ptp4l0-21swapper/007:30:140
134491430,4ptp4l3990-21apt-get08:15:152
134491430,4ptp4l2781-21iostat10:30:160
134491430,4ptp4l26696-21apt-get07:55:121
134491430,3ptp4l26287-21ls10:10:182
134491430,3ptp4l10907-21apt-get08:30:113
134491430,3ptp4l0-21swapper/209:19:402
134491430,3ptp4l0-21swapper/208:00:182
134491430,3ptp4l0-21swapper/107:51:041
134491420,7ptp4l12188-21wc09:40:203
134491420,5ptp4l5454-21ls07:10:001
134491420,5ptp4l5454-21ls07:10:001
134491420,5ptp4l14519-21ls09:45:200
134491420,5ptp4l0-21swapper/311:40:033
134491420,5ptp4l0-21swapper/309:50:193
134491420,5ptp4l0-21swapper/308:15:023
134491420,5ptp4l0-21swapper/207:35:192
134491420,5ptp4l0-21swapper/010:45:140
134491420,5ptp4l0-21swapper/009:50:180
134491420,4ptp4l7957-21ntp_states10:40:223
134491420,4ptp4l7224-21ls07:10:272
134491420,4ptp4l7224-21ls07:10:272
134491420,4ptp4l5636-21meminfo11:45:211
134491420,4ptp4l31834-21diskstats08:05:152
134491420,4ptp4l27003-21diskstats07:55:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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