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2026-03-20 - 18:26
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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 Fri Mar 20, 2026 12:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2999021350,4sleep3778699cyclictest09:05:223
134491770,12ptp4l5452-21apt-get07:05:110
121162760,5sleep20-21swapper/210:45:182
212732750,5sleep341-21ksoftirqd/311:05:173
778699650,3cyclictest2187-21missed_timers08:05:203
134491630,5ptp4l0-21swapper/207:35:162
134491620,4ptp4l0-21swapper/212:20:112
134491610,4ptp4l0-21swapper/009:55:250
778699580,29cyclictest6396-21taskset11:43:113
134491580,5ptp4l0-21swapper/008:42:560
213022570,4sleep00-21swapper/011:05:170
134491570,5ptp4l0-21swapper/107:08:111
134491570,3ptp4l0-21swapper/311:15:273
134491570,3ptp4l0-21swapper/209:05:152
778699560,3cyclictest14523-21irqrtprio10:50:173
134491560,4ptp4l0-21swapper/208:17:202
134491560,4ptp4l0-21swapper/207:40:122
134491560,4ptp4l0-21swapper/111:22:451
134491560,3ptp4l0-21swapper/310:05:183
778699551,16cyclictest134691getstats12:35:203
134491550,5ptp4l0-21swapper/209:45:172
134491550,4ptp4l0-21swapper/209:30:012
134491550,4ptp4l0-21swapper/011:50:170
134491550,3ptp4l0-21swapper/210:05:242
7786995415,37cyclictest0-21swapper/307:38:493
134491540,4ptp4l0-21swapper/212:19:342
134491540,4ptp4l0-21swapper/208:22:282
134491540,4ptp4l0-21swapper/207:15:252
134491540,3ptp4l0-21swapper/212:09:362
134491540,3ptp4l0-21swapper/208:25:312
778699530,3cyclictest10864-21tune2fs08:25:153
134491530,4ptp4l0-21swapper/009:43:150
134491530,10ptp4l0-21swapper/210:30:142
778699521,48cyclictest18614-21iostat_ios09:50:163
134491520,4ptp4l0-21swapper/208:51:422
134491520,4ptp4l0-21swapper/207:27:442
134491520,4ptp4l0-21swapper/109:38:491
134491520,4ptp4l0-21swapper/012:33:550
134491520,4ptp4l0-21swapper/012:29:300
134491520,4ptp4l0-21swapper/008:20:200
134491520,4ptp4l0-21swapper/008:11:240
134491520,10ptp4l0-21swapper/207:33:162
134491510,4ptp4l0-21swapper/209:28:422
134491510,4ptp4l0-21swapper/208:07:492
134491510,3ptp4l0-21swapper/210:23:452
134491500,4ptp4l0-21swapper/012:04:540
134491500,4ptp4l0-21swapper/011:31:270
134491500,4ptp4l0-21swapper/010:03:110
134491500,3ptp4l0-21swapper/209:52:522
134491500,3ptp4l0-21swapper/209:22:352
134491500,3ptp4l0-21swapper/209:17:152
134491500,3ptp4l0-21swapper/011:39:580
778699491,45cyclictest923-21ntp_states11:30:243
134491490,4ptp4l0-21swapper/107:55:521
134491490,4ptp4l0-21swapper/012:09:420
134491490,3ptp4l0-21swapper/208:04:012
134491490,3ptp4l0-21swapper/207:50:322
134491490,3ptp4l0-21swapper/008:15:090
778699480,45cyclictest31309-21/usr/sbin/munin08:00:143
778699480,3cyclictest28724-21apt09:05:003
134491480,4ptp4l0-21swapper/212:14:482
134491480,4ptp4l0-21swapper/212:00:002
134491480,4ptp4l0-21swapper/212:00:002
134491480,4ptp4l0-21swapper/207:57:172
134491480,3ptp4l0-21swapper/210:41:332
134491480,3ptp4l0-21swapper/008:53:340
134491480,12ptp4l0-21swapper/012:20:240
778699471,25cyclictest18859-21taskset07:31:433
134491470,4ptp4l0-21swapper/210:37:532
134491470,4ptp4l0-21swapper/010:49:160
134491470,3ptp4l0-21swapper/211:14:392
134491470,3ptp4l0-21swapper/109:40:371
134491460,3ptp4l0-21swapper/211:29:442
134491460,3ptp4l0-21swapper/210:51:052
134491460,12ptp4l0-21swapper/107:38:311
134491450,6ptp4l2318-21gnome-shell08:57:580
134491450,4ptp4l9379-21ls07:10:260
134491450,4ptp4l5255-21ls09:20:263
134491450,4ptp4l0-21swapper/307:15:253
134491450,4ptp4l0-21swapper/210:13:222
134491450,3ptp4l0-21swapper/211:37:192
134491450,15ptp4l0-21swapper/010:05:400
134491450,11ptp4l0-21swapper/110:25:151
134491450,11ptp4l0-21swapper/007:32:320
134491450,10ptp4l0-21swapper/011:04:290
778699440,2cyclictest29936-21apt-get11:25:123
134491440,9ptp4l0-21swapper/012:18:390
134491440,4ptp4l20342-21apt-get09:55:122
134491440,4ptp4l0-21swapper/212:39:252
134491440,4ptp4l0-21swapper/008:49:410
134491440,3ptp4l0-21swapper/211:00:242
134491440,3ptp4l0-21swapper/112:30:211
134491440,10ptp4l0-21swapper/011:40:020
778699433,23cyclictest0-21swapper/310:00:363
134491430,9ptp4l9-21ksoftirqd/009:02:420
134491430,9ptp4l0-21swapper/008:38:280
134491430,6ptp4l0-21swapper/312:10:263
134491430,6ptp4l0-21swapper/211:50:102
134491430,5ptp4l778699cyclictest10:30:173
134491430,4ptp4l6798-21apt-get11:45:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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