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2026-04-10 - 17:44
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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 rackeslot6.osadl.org (updated Fri Apr 10, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
12361739910598,5cyclictest1291742-21kworker/u8:2+events_unbound11:50:220
12361779910090,7cyclictest1334421-21latency_hist12:15:021
1236177999586,7cyclictest1236065-21kworker/u8:3+flush-179:007:30:141
1236173999587,7cyclictest1258576-21kworker/u8:1+events_unbound09:00:010
1236173999587,7cyclictest1258576-21kworker/u8:1+events_unbound09:00:010
1236173999283,7cyclictest1295454-21latency_hist10:15:010
1236177998980,6cyclictest1316372-21kworker/u8:1+flush-179:011:45:231
1236177998872,14cyclictest1281140-21latency_hist09:30:011
1236177998477,4cyclictest1316372-21kworker/u8:1+flush-179:011:25:261
1236173998375,6cyclictest1287504-21latency_hist09:50:010
1236177998071,7cyclictest1282968-21/usr/sbin/munin09:35:231
1236177997866,8cyclictest266-21systemd-journal10:50:141
1236173997871,5cyclictest1282167-21kworker/u8:2+flush-179:009:30:230
1236173997764,11cyclictest1312969-21apt-get11:10:000
1236177997566,7cyclictest1336022-21latency_hist12:20:021
1236173997565,7cyclictest1291742-21kworker/u8:2+flush-179:010:45:130
1236173997366,4cyclictest1265032-21kworker/u8:3+flush-179:008:45:250
1236177997249,20cyclictest1295709-21apt-get10:15:101
4577091710,17ptp4l441ktimers/307:05:513
1236173997165,4cyclictest1277026-21kworker/u8:0+events_unbound09:20:230
1236173997164,5cyclictest1282167-21kworker/u8:2+flush-179:009:50:250
1236173997062,6cyclictest1258657-21kworker/u8:2+events_unbound08:30:190
1236173997062,6cyclictest1258657-21kworker/u8:2+events_unbound08:30:190
1236173996963,4cyclictest1282771-21kworker/u8:3+flush-179:010:00:160
1236173996963,4cyclictest1244240-21kworker/u8:2+events_unbound08:00:140
1236173996962,6cyclictest1316372-21kworker/u8:1+flush-179:011:35:240
1236173996962,4cyclictest1265032-21kworker/u8:3+flush-179:009:05:020
1236177996858,8cyclictest1247729-21apt-get07:45:111
1236173996854,12cyclictest266-21systemd-journal08:00:000
1236173996760,5cyclictest1236065-21kworker/u8:3+events_unbound07:20:020
1236173996760,5cyclictest1236065-21kworker/u8:3+events_unbound07:20:010
1236177996659,5cyclictest1282771-21kworker/u8:3+flush-179:010:25:171
1236173996658,5cyclictest1241321-21kworker/u8:1+events_unbound07:30:230
1236173996656,7cyclictest1282771-21kworker/u8:3+events_unbound10:40:190
1236177996557,6cyclictest1282167-21kworker/u8:2+flush-179:009:30:251
1236177996556,6cyclictest1291742-21kworker/u8:2+flush-179:012:05:141
1236173996557,4cyclictest1291742-21kworker/u8:2+events_unbound11:15:160
1236177996455,6cyclictest1261793-21latency_hist08:30:011
1236173996456,5cyclictest1282771-21kworker/u8:3+flush-179:010:30:160
1236177996354,7cyclictest266-21systemd-journal07:40:001
1236173996355,4cyclictest1231548-21kworker/u8:1+flush-179:007:15:000
1236173996354,6cyclictest1260746-21kworker/u8:0+flush-179:008:25:200
1236173996353,7cyclictest1291742-21kworker/u8:2+events_unbound10:35:150
1236177996255,4cyclictest1244240-21kworker/u8:2+flush-179:007:40:211
1236177996247,14cyclictest1258576-21kworker/u8:1+flush-179:008:40:001
1236173996256,3cyclictest1316372-21kworker/u8:1+flush-179:011:20:200
1236173996255,5cyclictest1328033-21kworker/u8:3+flush-179:011:55:190
1236173996255,4cyclictest1316372-21kworker/u8:1+events_unbound11:25:250
1236173996253,5cyclictest1252298-21kworker/u8:3+flush-179:008:05:200
1236173996154,4cyclictest1316372-21kworker/u8:1+events_unbound11:45:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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