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2025-09-19 - 05:43
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot6.osadl.org (updated Fri Sep 19, 2025 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
804521040,96pltrace0-21swapper/119:05:221
3676521020,94pltrace0-21swapper/319:07:493
3676521010,93pltrace0-21swapper/719:05:277
368828549,10sleep20-21swapper/219:05:312
58102840,1sleep70-21swapper/719:10:177
80452760,67pltrace0-21swapper/519:05:175
369027242,10sleep40-21swapper/419:05:334
398926753,10sleep00-21swapper/019:09:470
374826042,13sleep60-21swapper/619:06:256
866452300,0pltrace0-21swapper/722:15:237
2429252270,2pltrace0-21swapper/721:45:177
421699230,16cyclictest0-21swapper/221:56:032
2208952230,7pltrace0-21swapper/720:35:447
1367752230,1pltrace1270-21pltrace-run00:15:286
420799220,1cyclictest0-21swapper/000:25:250
305552200,14pltrace4779-21http_loadtime22:05:191
569152190,8pltrace6014-21chrt20:09:547
3208352190,5pltrace0-21swapper/723:50:307
305552190,2pltrace0-21swapper/722:05:247
2929152190,0pltrace0-21swapper/723:45:567
4224991815,2cyclictest1697-21lldpd00:10:474
4224991815,2cyclictest1697-21lldpd00:10:474
4224991815,2cyclictest1524-21sed21:00:164
4224991815,2cyclictest10957-21sendmail_mailtr22:15:214
4207991811,4cyclictest15-21ksoftirqd/019:50:130
4207991810,4cyclictest15-21ksoftirqd/022:15:220
3079552180,0pltrace0-21swapper/720:55:217
3079552180,0pltrace0-21swapper/720:55:217
2429252180,3pltrace0-21swapper/721:40:317
2371352180,0pltrace0-21swapper/723:40:127
1424552180,5pltrace0-21swapper/722:25:087
1367752180,4pltrace0-21swapper/700:20:247
423399171,15cyclictest0-21swapper/619:51:126
4228991711,5cyclictest0-21swapper/520:56:015
4228991711,5cyclictest0-21swapper/520:56:015
4228991711,5cyclictest0-21swapper/520:48:555
422899171,8cyclictest0-21swapper/500:00:145
4224991714,2cyclictest23640-21unixbench_singl23:35:254
4224991714,2cyclictest12305-21ntpq19:20:204
4211991711,5cyclictest0-21swapper/122:48:471
4211991711,5cyclictest0-21swapper/100:08:391
420799179,4cyclictest15-21ksoftirqd/020:00:140
4207991712,1cyclictest191rcu_preempt19:30:200
4207991710,4cyclictest15-21ksoftirqd/021:05:240
2092852170,3pltrace0-21swapper/723:30:537
4237991611,3cyclictest0-21swapper/719:52:277
423799161,8cyclictest0-21swapper/719:36:247
423799161,14cyclictest0-21swapper/720:45:377
423799160,1cyclictest0-21swapper/721:05:237
4233991611,3cyclictest0-21swapper/622:22:386
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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