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2026-05-14 - 05:17
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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 Thu May 14, 2026 00:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591232168,22phc2sys0-21swapper/319:08:183
293502231167,23sleep10-21swapper/119:08:391
291542201168,22sleep20-21swapper/219:06:112
292422200165,23sleep00-21swapper/019:07:130
265332780,2sleep00-21swapper/021:10:290
138491720,0ptp4l401ktimersoftd/323:20:243
29906996410,18cyclictest29201-21taskset21:17:322
2990699629,16cyclictest8950-21switchtime20:35:252
2990699615,17cyclictest0-21swapper/219:10:202
138491610,1ptp4l401ktimersoftd/320:00:023
2990699609,17cyclictest31148-21mailstats21:20:252
2990699609,11cyclictest1493-21sed21:25:262
2990699599,16cyclictest25972-21phc2sys-jitter00:25:232
2990699599,16cyclictest1686-21taskset22:32:532
2990699595,16cyclictest0-21swapper/220:45:252
2990699589,7cyclictest15793-21open_files21:55:202
2990699589,7cyclictest10190-21if_enp1s022:50:152
2990699589,15cyclictest17017-21taskset19:49:112
2990699588,17cyclictest31746-21apt-get23:35:122
2990699587,16cyclictest0-21swapper/220:40:192
2990699579,45cyclictest21222sleep219:18:102
29906995710,17cyclictest15871-21sed20:50:182
83982560,2sleep00-21swapper/021:40:210
2990699566,14cyclictest0-21swapper/223:25:122
29906995611,11cyclictest13231-21awk00:00:232
2990699558,18cyclictest6105-21mailstats22:40:242
2990699558,18cyclictest6105-21mailstats22:40:242
2990699549,16cyclictest22706-21/usr/sbin/munin21:05:142
2990699544,16cyclictest0-21swapper/220:10:232
2990299542,16cyclictest29585-21apt-get22:25:110
2990699538,8cyclictest12693-21idleruntime21:50:152
2990699537,7cyclictest16128-21ls23:00:262
2990699537,17cyclictest19382-21apt-get23:10:102
2990699536,16cyclictest0-21swapper/219:24:482
29906995311,9cyclictest20069-21cat21:00:142
2990699528,17cyclictest23218-21ps23:15:222
2990699527,7cyclictest23919-21ls22:10:252
2990699527,18cyclictest0-21swapper/223:53:222
2990699527,16cyclictest26712-21ls20:05:252
2990699517,8cyclictest22205-21apt-get00:20:112
2990299512,14cyclictest22237-21apt-get21:05:110
2990699508,7cyclictest16595-21apt-get00:10:022
2990699498,6cyclictest7956-21diskstats19:30:152
2990699498,6cyclictest21419-21ls19:55:242
2990699498,17cyclictest3347-21meminfo21:30:202
2990699497,14cyclictest12000-21apt-get22:55:122
2990699488,7cyclictest22074-21apt-get20:00:022
2990699487,7cyclictest5868-21ls21:35:192
2990699487,7cyclictest29281-21apt-get23:30:102
2990699487,7cyclictest17742-21ps22:00:182
2990299482,14cyclictest12795-21df_inode20:45:150
2990699479,7cyclictest10348-21memory23:55:212
2990699477,7cyclictest21467-21ls22:05:262
2990699477,7cyclictest11357-21ls21:45:272
2990299472,13cyclictest30043-21df_inode00:35:140
2990699469,15cyclictest30266-21df20:15:152
2990699468,7cyclictest14760-21hddtemp_smartct00:05:152
2990699467,7cyclictest18585-21ls23:05:242
135191460,1getstats24227-1kworker/3:1H21:40:163
2990699459,7cyclictest25754-21memory22:15:212
2990699458,7cyclictest6036-21irqstats19:25:192
2990699458,7cyclictest6036-21irqstats19:25:192
2990699458,7cyclictest3074-21perl20:25:152
2990699458,7cyclictest27584-21diskstats00:30:152
2990699458,7cyclictest24835-21diskstats23:20:152
2990699456,7cyclictest18425-21ls19:50:182
2990699456,7cyclictest1319-21snmpd23:40:442
2990299452,14cyclictest27484-21df00:30:140
2990299452,14cyclictest19787-21apt-get19:55:110
29908994437,3cyclictest41-21ksoftirqd/321:39:593
2990699449,7cyclictest1065-21memory20:20:202
2990699449,13cyclictest19973-21diskstats00:15:142
2990699448,16cyclictest4321-21/usr/sbin/munin23:45:292
2990699446,6cyclictest13517-21ls19:40:192
29904994440,2cyclictest31812-21ls22:30:001
2990299443,15cyclictest17333-21apt-get19:50:100
2990299442,16cyclictest22194-21apt-get22:10:120
2990699439,16cyclictest27586-21diskstats22:20:142
138491430,0ptp4l401ktimersoftd/322:32:003
138491430,0ptp4l401ktimersoftd/320:40:083
135191430,2getstats0-21swapper/321:45:163
29908994226,14cyclictest41-21ksoftirqd/323:20:013
29904994221,4cyclictest11761-21turbostat.cron22:55:001
2990499420,1cyclictest0-21swapper/100:01:341
138491420,0ptp4l401ktimersoftd/322:45:203
138491420,0ptp4l401ktimersoftd/319:15:433
138491420,0ptp4l401ktimersoftd/300:35:203
138491420,0ptp4l401ktimersoftd/300:05:153
2990699418,7cyclictest8277-21meminfo21:40:202
2990299412,7cyclictest27490-21df22:20:130
2990299411,7cyclictest15260-21iostat_ios21:55:160
138491410,0ptp4l401ktimersoftd/323:30:203
138491410,0ptp4l401ktimersoftd/300:26:573
29908994035,3cyclictest14560-21cron20:50:003
29906994010,5cyclictest50798rtkit-daemon22:35:202
29904994033,4cyclictest25-21ksoftirqd/122:50:001
2990699398,7cyclictest7453-21df22:45:142
2990299392,7cyclictest15339-21df_inode19:45:150
29908993833,3cyclictest41-21ksoftirqd/321:20:203
29908993832,3cyclictest41-21ksoftirqd/322:40:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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