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2026-04-22 - 01:02
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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 Apr 21, 2026 12:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2271021540,4sleep2651099cyclictest07:45:122
6509997612,62cyclictest11819-21kworker/1:111:25:491
134491620,3ptp4l0-21swapper/010:40:290
650999601,57cyclictest11819-21kworker/1:109:31:091
134491580,22ptp4l9-21ksoftirqd/012:20:190
164082570,3sleep10-21swapper/108:40:151
134491570,4ptp4l0-21swapper/208:47:062
134491570,4ptp4l0-21swapper/108:05:191
134491570,3ptp4l0-21swapper/011:20:130
134491570,3ptp4l0-21swapper/010:20:210
134491560,3ptp4l0-21swapper/311:50:213
134491560,12ptp4l4175-21apt-get07:05:121
134491550,4ptp4l0-21swapper/211:43:352
134491540,4ptp4l0-21swapper/012:04:590
134491530,5ptp4l0-21swapper/209:08:282
134491530,4ptp4l0-21swapper/011:39:350
134491530,4ptp4l0-21swapper/010:06:190
134491530,4ptp4l0-21swapper/007:57:270
134491530,3ptp4l832-21irqrtprio10:25:192
134491530,3ptp4l13875-21perl07:25:160
134491530,3ptp4l0-21swapper/210:57:122
134491530,13ptp4l0-21swapper/008:15:270
134491530,13ptp4l0-21swapper/008:15:270
134491520,4ptp4l0-21swapper/212:01:222
134491520,4ptp4l0-21swapper/211:31:492
134491520,4ptp4l0-21swapper/210:16:332
134491520,4ptp4l0-21swapper/012:30:210
134491520,3ptp4l0-21swapper/207:44:552
134491520,3ptp4l0-21swapper/010:10:140
134491510,5ptp4l0-21swapper/007:07:220
134491510,4ptp4l0-21swapper/010:32:520
134491510,13ptp4l24006-21df12:25:150
134491500,4ptp4l0-21swapper/209:54:322
134491500,4ptp4l0-21swapper/009:45:380
134491500,4ptp4l0-21swapper/009:26:110
134491500,4ptp4l0-21swapper/009:17:220
134491500,4ptp4l0-21swapper/008:55:520
134491500,3ptp4l0-21swapper/012:07:290
134491500,3ptp4l0-21swapper/008:35:310
134491500,3ptp4l0-21swapper/007:22:380
651199493,44cyclictest0-21swapper/309:16:293
134491490,4ptp4l0-21swapper/209:32:172
134491490,3ptp4l0-21swapper/110:54:341
134491490,3ptp4l0-21swapper/009:40:020
134491490,3ptp4l0-21swapper/008:53:180
134491480,4ptp4l0-21swapper/309:08:173
134491480,4ptp4l0-21swapper/010:29:040
134491480,4ptp4l0-21swapper/007:12:170
134491480,3ptp4l0-21swapper/308:29:373
134491480,3ptp4l0-21swapper/211:16:222
134491470,5ptp4l0-21swapper/110:40:181
134491470,4ptp4l0-21swapper/011:45:070
134491470,3ptp4l0-21swapper/210:09:002
134491470,3ptp4l0-21swapper/109:42:471
134491470,10ptp4l0-21swapper/009:04:430
650999460,7cyclictest23622-21apt-get11:15:131
650999460,44cyclictest11819-21kworker/1:109:20:091
134491460,4ptp4l0-21swapper/009:58:510
134491460,4ptp4l0-21swapper/008:44:280
134491460,3ptp4l23778-21diskstats10:05:141
134491460,3ptp4l0-21swapper/011:19:080
651099452,2cyclictest0-21swapper/209:14:382
134491450,5ptp4l0-21swapper/207:09:542
134491450,4ptp4l0-21swapper/110:56:541
134491450,3ptp4l0-21swapper/111:47:531
134491450,3ptp4l0-21swapper/107:16:241
651099441,40cyclictest0-21swapper/208:00:192
134491440,9ptp4l0-21swapper/207:17:192
134491440,4ptp4l0-21swapper/112:12:581
134491440,4ptp4l0-21swapper/007:18:420
134491440,3ptp4l651199cyclictest08:46:563
134491440,3ptp4l0-21swapper/010:56:130
134491440,10ptp4l0-21swapper/208:28:082
134491430,7ptp4l33-21ksoftirqd/211:57:172
134491430,4ptp4l24411-21ntp_states08:55:231
134491430,4ptp4l21326-21apt-get11:10:133
134491430,4ptp4l0-21swapper/108:54:171
134491430,3ptp4l0-21swapper/209:43:482
134491420,5ptp4l6317-21date07:10:003
134491420,5ptp4l22344-21/usr/sbin/munin12:20:191
134491420,5ptp4l0-21swapper/108:30:231
134491420,5ptp4l0-21swapper/108:25:151
134491420,5ptp4l0-21swapper/008:45:130
134491420,5ptp4l0-21swapper/008:05:120
134491420,4ptp4l27056-21ntp_states11:20:222
134491420,4ptp4l25942-21apt-get11:20:123
134491420,4ptp4l25614-21apt-get09:00:122
134491420,4ptp4l22723-21apt-get07:45:131
134491420,4ptp4l22345-21ls11:10:221
134491420,4ptp4l17390-21iostat12:10:170
134491420,4ptp4l16886-21df11:00:141
134491420,4ptp4l12063-21apt-get10:50:130
134491420,4ptp4l0-21swapper/208:20:252
134491420,3ptp4l4774-21apt-get09:25:111
134491420,3ptp4l0-21swapper/112:19:101
134491420,3ptp4l0-21swapper/112:02:331
134491420,3ptp4l0-21swapper/010:45:330
134491410,4ptp4l8595-21users08:20:271
134491410,4ptp4l7647-21iostat_ios09:30:160
134491410,4ptp4l3106-21df_inode11:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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