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2025-12-16 - 15:22
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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 rack3slot6.osadl.org (updated Tue Dec 16, 2025 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
971221100,5chrt9331-21/usr/sbin/munin07:25:331
3205999821,20cyclictest0-21swapper/012:05:140
3205999513,19cyclictest0-21swapper/010:45:140
3205999318,18cyclictest0-21swapper/009:10:130
265329324,25sleep00-21swapper/007:06:100
3205999215,21cyclictest0-21swapper/012:35:110
228829251,29sleep10-21swapper/107:05:261
321099917,26cyclictest30550-21apt-get11:25:161
3205999118,18cyclictest0-21swapper/008:10:130
321099886,22cyclictest30506-21apt-get09:55:141
321099886,22cyclictest30506-21apt-get09:55:141
3205998815,23cyclictest23182-21apt-get09:35:140
3210998738,34cyclictest26-21ksoftirqd/110:45:131
320599877,28cyclictest0-21swapper/011:25:170
321099826,20cyclictest25558-21apt-get08:10:131
3205998215,25cyclictest0-21swapper/012:30:140
3205998056,14cyclictest0-21swapper/011:00:120
321099786,20cyclictest21505-21apt-get12:30:131
321099785,21cyclictest8875-21apt-get08:55:141
3210997827,15cyclictest11566-21sed09:00:351
3210997821,18cyclictest12256-21cron12:05:001
320599789,31cyclictest8880-21taskset08:55:140
3205997861,9cyclictest14-21ksoftirqd/007:10:150
321099773,28cyclictest13993-21diskmemload09:10:151
3210997718,20cyclictest448-21dbus-daemon09:09:001
3210997627,15cyclictest22146-21sed09:30:371
3210997623,19cyclictest448-21dbus-daemon09:30:001
3210997529,14cyclictest10650-21apt-get10:30:121
321099752,15cyclictest23043-21sh11:09:561
3210997518,17cyclictest6111-21grep08:45:291
3210997420,15cyclictest13267-21cut12:05:331
3205997416,52cyclictest0-21swapper/010:50:130
3210997321,15cyclictest2121-21wc08:35:191
3210997321,15cyclictest2121-21wc08:35:191
3210997321,13cyclictest23946-21open_files09:35:441
3210997321,13cyclictest23676-21latency_hist08:05:011
321099727,22cyclictest23240-21apt-get12:35:111
3210997218,18cyclictest32540-21gdbus10:00:051
3210997120,14cyclictest2521-21head10:05:291
3205997115,50cyclictest0-21swapper/012:00:140
3210997019,15cyclictest6327-21/usr/sbin/munin10:15:361
3205997013,16cyclictest0-21swapper/011:50:150
3205997012,51cyclictest0-21swapper/008:20:140
3210996928,8cyclictest0-21swapper/109:20:131
3210996923,13cyclictest27858-21processes11:15:341
3210996921,15cyclictest18197-21seq07:48:211
3210996822,14cyclictest9150-21sort10:25:201
3210996822,14cyclictest24087-21expr08:05:191
3210996820,15cyclictest6791-21seq11:47:401
3210996819,17cyclictest28861-21cron08:20:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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