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2026-04-29 - 02:37
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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 Tue Apr 28, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
814260999891,4cyclictest868780-21kworker/u8:0+events_unbound10:10:250
814263999784,10cyclictest900563-21kworker/u8:1+flush-179:012:00:001
814260999786,8cyclictest877231-21latency_hist10:25:020
814263999178,9cyclictest1213033-21systemd-journal10:30:011
814263999178,9cyclictest1213033-21systemd-journal10:30:001
814260998777,7cyclictest872451-21latency_hist10:10:000
814263998581,3cyclictest886747-21kworker/u8:0+flush-179:011:05:161
814260998578,5cyclictest900563-21kworker/u8:1+flush-179:011:55:220
814260998572,9cyclictest1213033-21systemd-journal08:40:000
814263998378,4cyclictest886747-21kworker/u8:0+events_unbound11:00:241
814263998277,4cyclictest909858-21kworker/u8:0+flush-179:012:15:211
814260998270,9cyclictest1213033-21systemd-journal07:40:010
814263998176,3cyclictest840346-21kworker/u8:1+events_unbound08:50:171
814263998168,9cyclictest1213033-21systemd-journal09:00:001
814260998171,7cyclictest859462-21latency_hist09:30:020
814263997971,6cyclictest794725-21kworker/u8:0+events_unbound07:10:041
814260997968,8cyclictest814012-21latency_hist07:10:030
814263997873,4cyclictest886809-21kworker/u8:2+flush-179:011:15:231
814260997751,24cyclictest1213033-21systemd-journal11:00:000
814263997671,3cyclictest860525-21kworker/u8:0+events_unbound09:35:151
814263997571,3cyclictest853073-21kworker/u8:2+events_unbound09:25:171
814263997563,9cyclictest1213033-21systemd-journal12:40:001
814260997564,9cyclictest869535-21apt-get10:00:130
814263997468,4cyclictest830867-21kworker/u8:2+events_unbound08:45:211
814263997466,7cyclictest868780-21kworker/u8:0+flush-179:010:00:241
814263997466,6cyclictest830788-21kworker/u8:0+flush-179:008:20:231
814271997371,1cyclictest0-21swapper/307:11:593
814263997367,4cyclictest828277-21kworker/u8:3+events_unbound07:55:181
814260997365,6cyclictest904536-21latency_hist11:50:010
814260997362,9cyclictest880657-21apt-get10:35:130
814268997268,2cyclictest0-21swapper/207:11:592
814260997263,6cyclictest826027-21kworker/u8:1+flush-179:007:50:180
814260997263,6cyclictest826027-21kworker/u8:1+flush-179:007:50:170
814263997167,3cyclictest850182-21kworker/u8:0+events_unbound09:05:261
814263997166,4cyclictest886747-21kworker/u8:0+events_unbound10:55:251
814263997153,13cyclictest864539-21kworker/u8:2+events_unbound09:55:151
81426099710,67cyclictest1-21systemd12:32:470
814263997060,8cyclictest886809-21kworker/u8:2+events_unbound11:45:001
814263996965,3cyclictest886809-21kworker/u8:2+events_unbound11:10:201
814260996945,8cyclictest814555-21apt-get07:10:140
814263996864,3cyclictest882024-21kworker/u8:3+flush-179:010:44:551
814263996864,3cyclictest880933-21kworker/u8:1+events_unbound10:35:231
814263996864,3cyclictest830788-21kworker/u8:0+events_unbound08:03:471
814263996863,4cyclictest826031-21kworker/u8:2+events_unbound07:45:201
814263996762,4cyclictest910889-21kworker/u8:2+events_unbound12:10:231
814263996762,3cyclictest840346-21kworker/u8:1+events_unbound09:20:181
814263996662,3cyclictest862881-21kworker/u8:1+flush-179:009:50:231
814263996661,4cyclictest840346-21kworker/u8:1+flush-179:008:40:251
814260996653,10cyclictest1213033-21systemd-journal09:15:000
814268996562,2cyclictest0-21swapper/208:48:582
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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