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2026-03-28 - 18:50
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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 rackdslot4.osadl.org (updated Sat Mar 28, 2026 12:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591204170,23phc2sys0-21swapper/307:09:463
216412202168,22sleep10-21swapper/107:08:391
214342202170,21sleep20-21swapper/207:06:002
214642199166,22sleep00-21swapper/007:06:220
138491760,1ptp4l391rcuc/309:55:163
239192660,3sleep20-21swapper/207:10:292
2204099560,16cyclictest223-21systemd-journal07:27:372
2204099540,15cyclictest16228-21/usr/sbin/munin11:15:232
2204099530,16cyclictest0-21swapper/207:55:212
2204099510,11cyclictest1982-21sshd08:38:152
138491500,1ptp4l401ktimersoftd/310:00:143
2204099490,11cyclictest2741-21df_abs09:45:152
22039994943,4cyclictest7103-21cron08:50:001
2204099480,18cyclictest29853-21apt-get08:30:132
2204099480,17cyclictest6108-21/usr/sbin/munin09:50:212
2204099480,12cyclictest16395-21switchtime08:00:262
46292450,3sleep0111rcuc/009:50:000
323432450,1sleep00-21swapper/010:45:130
138491430,0ptp4l401ktimersoftd/308:08:193
138491420,0ptp4l401ktimersoftd/309:32:173
138491410,0ptp4l401ktimersoftd/311:08:273
138491410,0ptp4l401ktimersoftd/311:08:273
138491410,0ptp4l401ktimersoftd/310:55:163
138491410,0ptp4l401ktimersoftd/309:00:193
22038994035,3cyclictest9-21ksoftirqd/009:21:290
2204099390,7cyclictest7354-21apt-get08:50:122
2204099390,16cyclictest12292-21/usr/sbin/munin12:15:272
22039993934,3cyclictest25-21ksoftirqd/108:40:011
22040993832,3cyclictest33-21ksoftirqd/207:49:592
2204099380,9cyclictest0-21swapper/211:31:292
2204099380,8cyclictest17960-21iostat_ios12:25:182
2204099380,7cyclictest30874-21memory09:35:192
2204099380,7cyclictest27593-21df10:35:132
2204099380,7cyclictest27593-21df10:35:132
22041993732,3cyclictest41-21ksoftirqd/308:18:163
22041993731,4cyclictest41-21ksoftirqd/309:15:293
22041993731,4cyclictest41-21ksoftirqd/308:40:113
22041993730,4cyclictest41-21ksoftirqd/312:06:113
22041993723,12cyclictest41-21ksoftirqd/308:20:113
22040993730,4cyclictest33-21ksoftirqd/207:23:242
2204099370,8cyclictest3511-21memory11:55:202
2204099370,8cyclictest3511-21memory11:55:202
2204099370,7cyclictest30416-21perl11:45:162
2204099370,7cyclictest21096-21memory11:25:222
22039993731,4cyclictest25-21ksoftirqd/110:45:541
22038993732,4cyclictest9-21ksoftirqd/007:20:160
22038993732,3cyclictest9-21ksoftirqd/010:40:000
22038993732,3cyclictest9-21ksoftirqd/010:40:000
22038993732,3cyclictest9-21ksoftirqd/007:40:000
22038993731,4cyclictest9-21ksoftirqd/012:06:580
138491370,9ptp4l2204199cyclictest12:35:263
2204199367,28cyclictest29356-21kworker/3:008:45:433
22041993621,12cyclictest41-21ksoftirqd/308:00:193
22040993630,4cyclictest33-21ksoftirqd/207:34:082
2204099360,7cyclictest20721-21iostat08:10:202
2204099360,17cyclictest23036-21perl08:15:152
22039993630,4cyclictest25-21ksoftirqd/112:32:171
22039993630,4cyclictest25-21ksoftirqd/112:16:041
22039993630,4cyclictest25-21ksoftirqd/109:47:011
22038993630,4cyclictest9-21ksoftirqd/011:57:540
22038993630,4cyclictest9-21ksoftirqd/011:57:540
22041993530,3cyclictest41-21ksoftirqd/307:28:023
22041993529,4cyclictest41-21ksoftirqd/311:13:363
22041993529,4cyclictest41-21ksoftirqd/307:39:453
22041993529,3cyclictest41-21ksoftirqd/310:05:103
22041993528,4cyclictest41-21ksoftirqd/308:11:043
22040993529,4cyclictest33-21ksoftirqd/210:44:022
22040993529,4cyclictest33-21ksoftirqd/209:57:292
22040993528,4cyclictest33-21ksoftirqd/210:21:122
22040993528,4cyclictest33-21ksoftirqd/208:20:052
2204099350,7cyclictest25485-21hddtemp_smartct11:35:162
2204099350,16cyclictest2315-21gnome-shell10:16:592
2204099350,15cyclictest15250-21diskstats12:20:172
22039993529,4cyclictest25-21ksoftirqd/111:31:311
22039993529,4cyclictest25-21ksoftirqd/110:35:311
22039993529,4cyclictest25-21ksoftirqd/110:35:311
22039993529,4cyclictest25-21ksoftirqd/110:19:181
22039993529,4cyclictest25-21ksoftirqd/110:08:041
22039993529,4cyclictest25-21ksoftirqd/107:29:451
22039993528,4cyclictest25-21ksoftirqd/112:09:061
22039993528,4cyclictest25-21ksoftirqd/110:27:241
22038993531,3cyclictest9-21ksoftirqd/012:20:010
22038993530,3cyclictest9-21ksoftirqd/007:20:000
22038993530,3cyclictest9-21ksoftirqd/007:20:000
22038993529,4cyclictest9-21ksoftirqd/012:29:430
22038993529,4cyclictest9-21ksoftirqd/009:26:260
22041993429,3cyclictest41-21ksoftirqd/309:25:083
22041993428,4cyclictest41-21ksoftirqd/312:34:113
22041993428,4cyclictest41-21ksoftirqd/312:17:013
22041993428,4cyclictest41-21ksoftirqd/311:27:163
22041993428,4cyclictest41-21ksoftirqd/311:04:453
22041993428,4cyclictest41-21ksoftirqd/310:49:573
22041993428,4cyclictest41-21ksoftirqd/307:54:303
22041993428,4cyclictest41-21ksoftirqd/307:21:293
22040993428,4cyclictest33-21ksoftirqd/211:23:022
22040993427,4cyclictest33-21ksoftirqd/209:40:362
2204099340,7cyclictest1592-21users10:45:272
2203999346,26cyclictest0-21swapper/108:25:231
22039993429,3cyclictest25-21ksoftirqd/110:32:391
22039993429,3cyclictest25-21ksoftirqd/109:30:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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