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2026-04-15 - 17:57
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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 Wed Apr 15, 2026 12:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
113132228163,22sleep10-21swapper/107:09:251
112852202167,23sleep00-21swapper/007:09:040
112572200167,22sleep20-21swapper/207:08:412
111672200165,23sleep30-21swapper/307:07:343
2762921790,5sleep31165399cyclictest09:50:163
3194021540,2sleep21165299cyclictest07:50:132
134991620,7getstats1165399cyclictest09:07:533
1165299564,10cyclictest1817-21cat10:05:002
1165299552,11cyclictest223-21systemd-journal12:10:002
1165299541,11cyclictest1-21systemd10:30:242
1165299530,12cyclictest23882-21latency_hist08:40:002
1165099534,5cyclictest0-21swapper/007:10:260
1165299526,7cyclictest28955-21cpuspeed08:50:102
1165099525,5cyclictest0-21swapper/012:25:000
1165299514,10cyclictest19335-21cstates07:25:122
1165299513,10cyclictest31927-21cpuspeed_turbos11:05:132
1165299512,17cyclictest1319-21snmpd10:57:202
1165299511,11cyclictest23214-21cat07:30:242
1165099501,11cyclictest7648-21sed09:10:190
1165299494,11cyclictest4953-21/usr/sbin/munin10:10:142
11651994929,17cyclictest25-21ksoftirqd/109:51:581
1165099495,7cyclictest20346-21kernelversion09:35:180
1165099494,6cyclictest0-21swapper/011:20:170
1165299482,9cyclictest5268-21sed09:05:212
1165299481,11cyclictest9383-21expr08:10:132
1165299480,16cyclictest22068-21apt-get09:40:102
1165299480,10cyclictest19323-21apt-get09:35:112
11652994741,4cyclictest36092irq/128-enp1s0-08:21:502
1165299471,10cyclictest14023-21latency_hist08:20:012
1165099472,17cyclictest836-21cat07:50:250
1165099472,17cyclictest4535-21awk10:10:110
1165099472,16cyclictest6646-21date08:05:000
1165099471,17cyclictest22781-21sed11:50:190
1165099471,11cyclictest510-21sed08:55:260
1165299460,8cyclictest21199-21ls10:40:252
1165299460,10cyclictest0-21swapper/212:35:142
1165099462,7cyclictest17033-21fschecks_count08:25:160
1165099460,11cyclictest16773-21latency_hist10:35:000
138491450,1ptp4l401ktimersoftd/308:57:113
1165299450,7cyclictest1812-21apt-get12:15:112
1165299450,7cyclictest1628-21apt-get09:00:112
1165299450,14cyclictest6880-21apt-get11:20:102
1165199450,43cyclictest0-21swapper/108:01:031
1165099451,17cyclictest14065-21/usr/sbin/munin08:20:210
1165099451,15cyclictest24373-21df_abs08:40:140
1165099451,14cyclictest2315-21gnome-shell07:38:580
138491440,0ptp4l401ktimersoftd/308:31:503
1165299444,7cyclictest18367-21sensors_temp09:30:232
1165299443,9cyclictest12746-21cat10:25:172
1165299441,9cyclictest9334-21apt-get11:25:102
1165299440,8cyclictest16534-21apt-get08:25:122
1165299440,7cyclictest21695-21apt-get11:50:112
1165199440,42cyclictest0-21swapper/108:40:331
1165099441,16cyclictest21820-21expr07:30:120
1165099440,9cyclictest7333-21cat08:05:170
138491430,9ptp4l0-21swapper/311:48:013
1165399430,2cyclictest121rcu_preempt12:30:093
1165299433,7cyclictest32330-21irqstats08:55:192
1165299430,8cyclictest8176-21ls09:10:242
11651994336,4cyclictest11624-21cron10:25:011
1165199430,1cyclictest0-21swapper/107:36:431
138491420,0ptp4l401ktimersoftd/312:02:523
138491420,0ptp4l401ktimersoftd/309:59:563
1165299422,7cyclictest15241-21memory07:15:192
1165299420,7cyclictest6684-21apt-get08:05:122
1165199420,41cyclictest0-21swapper/110:06:031
1165099422,10cyclictest30772-21sed12:05:260
1165399415,2cyclictest121rcu_preempt11:55:003
11652994135,3cyclictest26452-21cron07:40:002
1165099412,17cyclictest29181-21apt-get07:45:120
1165099411,7cyclictest10927-21ssh11:25:250
11653994035,3cyclictest41-21ksoftirqd/309:25:013
11653994035,3cyclictest41-21ksoftirqd/307:20:003
1165299401,7cyclictest24557-21hddtemp_smartct08:40:172
1165299400,17cyclictest1319-21snmpd11:00:142
11651994032,5cyclictest25-21ksoftirqd/110:20:001
1165099401,7cyclictest24995-21forks09:45:150
1165099400,8cyclictest28492-21ssh10:55:240
11653993934,3cyclictest41-21ksoftirqd/311:30:013
11653993934,3cyclictest41-21ksoftirqd/308:10:003
11653993934,3cyclictest41-21ksoftirqd/307:30:163
11653993934,3cyclictest21337-21dump-pmu-power07:30:013
11653993933,4cyclictest41-21ksoftirqd/312:25:013
11653993933,3cyclictest41-21ksoftirqd/310:25:013
11651993910,27cyclictest0-21swapper/110:41:031
1165099392,18cyclictest9912-21tune2fs10:20:130
1165099390,6cyclictest18457-21ssh09:30:240
11653993834,3cyclictest41-21ksoftirqd/310:30:193
11653993833,3cyclictest41-21ksoftirqd/311:40:003
11653993833,3cyclictest41-21ksoftirqd/309:00:123
11652993833,3cyclictest33-21ksoftirqd/212:20:102
1165099380,7cyclictest29435-21apt-get09:55:130
1165099380,11cyclictest19170-21/usr/sbin/munin11:45:160
11653993733,3cyclictest41-21ksoftirqd/308:50:123
11653993733,2cyclictest41-21ksoftirqd/308:45:183
11653993732,3cyclictest41-21ksoftirqd/310:55:013
11653993731,4cyclictest41-21ksoftirqd/312:26:553
11653993731,4cyclictest41-21ksoftirqd/309:40:003
1165299374,30cyclictest18252-21/usr/sbin/munin10:35:232
1165299371,10cyclictest38222sleep211:10:512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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