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2026-05-23 - 11:32
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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 23, 2026 00:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1910621540,6sleep1255199cyclictest22:00:131
255399682,63cyclictest0-21swapper/321:48:263
255399670,21cyclictest17256-21/usr/sbin/munin00:15:283
255399660,21cyclictest17643-21fschecks_time20:50:253
255399660,21cyclictest17643-21fschecks_time20:50:253
134491630,4ptp4l0-21swapper/121:35:271
255399601,27cyclictest25536-21taskset23:20:463
255399600,27cyclictest21488-21taskset00:23:163
134491600,4ptp4l0-21swapper/120:50:081
134491600,4ptp4l0-21swapper/120:50:081
134491590,4ptp4l0-21swapper/221:30:182
134491590,15ptp4l32564-21apt-get19:05:122
255399580,29cyclictest14469-21man-db00:07:063
134491580,4ptp4l0-21swapper/123:53:101
134491580,3ptp4l0-21swapper/219:37:112
134491580,3ptp4l0-21swapper/023:25:160
255399570,27cyclictest23184-21taskset19:53:213
134491570,4ptp4l0-21swapper/221:51:592
255399560,28cyclictest21185-21seq23:14:063
134491560,4ptp4l0-21swapper/319:10:393
134491560,4ptp4l0-21swapper/123:14:551
134491560,3ptp4l0-21swapper/221:24:412
134491560,3ptp4l0-21swapper/200:05:232
134491560,3ptp4l0-21swapper/123:29:331
134491560,3ptp4l0-21swapper/121:00:231
134491560,3ptp4l0-21swapper/120:25:121
134491560,3ptp4l0-21swapper/022:50:080
134491550,4ptp4l0-21swapper/223:42:182
134491550,4ptp4l0-21swapper/219:47:462
255399540,28cyclictest32584-21taskset20:13:063
134491540,4ptp4l0-21swapper/220:09:242
134491540,4ptp4l0-21swapper/022:31:130
134491540,4ptp4l0-21swapper/022:12:120
134491540,3ptp4l0-21swapper/320:45:193
134491540,3ptp4l0-21swapper/119:57:591
134491540,3ptp4l0-21swapper/020:56:380
134491540,2ptp4l0-21swapper/000:15:220
69922530,4sleep00-21swapper/020:25:290
134491530,5ptp4l0-21swapper/222:23:002
134491530,4ptp4l0-21swapper/100:00:391
134491530,4ptp4l0-21swapper/019:19:070
134491520,4ptp4l0-21swapper/123:44:521
134491520,4ptp4l0-21swapper/022:55:140
134491520,3ptp4l0-21swapper/319:07:473
134491520,3ptp4l0-21swapper/219:15:102
134491520,2ptp4l0-21swapper/021:51:380
134491520,1ptp4l0-21swapper/019:13:580
255399511,29cyclictest5553-21seq21:31:443
255399511,18cyclictest15181-21df00:10:133
255399510,26cyclictest3311-21runrttasks21:27:273
134491510,4ptp4l0-21swapper/223:37:042
134491510,4ptp4l0-21swapper/221:10:392
134491510,4ptp4l0-21swapper/220:57:302
134491510,3ptp4l0-21swapper/220:17:152
134491510,3ptp4l0-21swapper/123:19:091
134491510,2ptp4l0-21swapper/022:36:390
255399500,29cyclictest32581-21seq23:37:413
255399500,27cyclictest2489-21taskset23:41:493
134491500,4ptp4l0-21swapper/223:52:412
134491500,4ptp4l0-21swapper/120:56:361
134491500,3ptp4l0-21swapper/022:16:120
255399493,22cyclictest0-21swapper/323:07:413
134491490,3ptp4l0-21swapper/121:34:031
134491490,3ptp4l0-21swapper/020:49:580
134491490,11ptp4l0-21swapper/023:02:000
134491480,8ptp4l0-21swapper/121:46:301
134491480,4ptp4l0-21swapper/100:16:451
134491480,3ptp4l0-21swapper/119:45:131
134491480,2ptp4l0-21swapper/320:00:113
134491470,4ptp4l0-21swapper/220:53:182
134491470,4ptp4l0-21swapper/220:53:182
134491470,4ptp4l0-21swapper/023:07:200
134491470,3ptp4l0-21swapper/319:57:093
134491470,3ptp4l0-21swapper/122:23:311
255399460,28cyclictest28421-21chrt21:11:093
255399460,26cyclictest23780-21taskset21:00:413
134491460,4ptp4l0-21swapper/119:52:501
134491460,3ptp4l0-21swapper/122:44:441
134491460,3ptp4l0-21swapper/122:34:551
134491460,3ptp4l0-21swapper/021:06:270
134491460,13ptp4l0-21swapper/122:17:151
134491450,4ptp4l0-21swapper/219:34:542
134491450,4ptp4l0-21swapper/123:30:151
134491450,4ptp4l0-21swapper/119:31:311
134491450,3ptp4l0-21swapper/019:21:210
255399443,39cyclictest0-21swapper/323:18:293
255399442,23cyclictest0-21swapper/300:03:283
255399440,15cyclictest134491ptp4l00:33:543
134491440,9ptp4l0-21swapper/221:49:492
134491440,9ptp4l0-21swapper/219:41:232
134491440,9ptp4l0-21swapper/023:46:100
134491440,5ptp4l0-21swapper/200:20:192
134491440,4ptp4l25885-21apt-get20:00:112
134491440,4ptp4l0-21swapper/119:11:211
134491440,4ptp4l0-21swapper/000:11:220
134491440,3ptp4l0-21swapper/119:42:331
134491440,3ptp4l0-21swapper/020:00:470
255399430,26cyclictest21271-21taskset20:55:563
134491430,9ptp4l0-21swapper/223:00:512
134491430,5ptp4l0-21swapper/221:25:102
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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