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2026-05-01 - 17:57
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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 May 01, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
729604999887,9cyclictest822993-21apt-get12:00:000
729604999687,6cyclictest732754-21latency_hist07:20:010
729604999589,4cyclictest762000-21kworker/u8:2+events_unbound09:15:240
729604998980,7cyclictest715475-21kworker/u8:2+events_unbound07:30:000
729604998680,4cyclictest776582-21kworker/u8:1+events_unbound09:45:000
729604998579,4cyclictest794137-21kworker/u8:3+events_unbound11:24:590
729604998376,5cyclictest715475-21kworker/u8:2+flush-179:007:35:220
729604998375,6cyclictest750588-21kworker/u8:0+events_unbound08:20:000
729604998277,4cyclictest794137-21kworker/u8:3+flush-179:011:40:010
729604998273,6cyclictest826445-21latency_hist12:10:020
729606998169,10cyclictest821943-21diskstats11:55:151
729604998173,7cyclictest816883-21kworker/u8:0+events_unbound11:45:240
729606998072,6cyclictest749005-21kworker/u8:1+flush-179:008:30:201
729606997970,7cyclictest1213033-21systemd-journal10:55:001
729606997959,17cyclictest1213033-21systemd-journal12:37:561
729604997970,6cyclictest782504-21kworker/u8:1+flush-179:009:55:190
729606997868,8cyclictest754303-21/usr/sbin/munin08:25:231
729611997769,5cyclictest741093-21turbostat07:45:003
729604997772,3cyclictest807126-21unin-run11:10:010
729604997771,4cyclictest832799-21kworker/u8:3+flush-179:012:35:190
729604997770,6cyclictest792493-21kworker/u8:2+flush-179:011:05:000
729606997665,9cyclictest749279-21apt-get08:10:111
729604997670,5cyclictest753782-21kworker/u8:2+flush-179:008:40:010
729604997668,6cyclictest741120-21kworker/u8:1+events_unbound08:00:010
729606997567,6cyclictest776592-21latency_hist09:35:001
729604997570,4cyclictest794137-21kworker/u8:3+events_unbound10:55:240
729604997567,5cyclictest749005-21kworker/u8:1+events_unbound08:10:240
729606997468,4cyclictest787715-21kworker/u8:0+flush-179:010:20:011
729606997463,9cyclictest802565-21apt-get10:55:111
729604997463,5cyclictest794137-21kworker/u8:3+events_unbound11:40:230
729606997366,5cyclictest715475-21kworker/u8:2+events_unbound07:15:261
729604997366,5cyclictest773397-21kworker/u8:2+flush-179:009:40:000
729604997268,3cyclictest794137-21kworker/u8:3+flush-179:011:15:250
729606997059,9cyclictest1213033-21systemd-journal08:25:001
729604997063,5cyclictest763584-21kworker/u8:0+events_unbound09:00:210
729604997063,5cyclictest763584-21kworker/u8:0+events_unbound09:00:210
729606996960,6cyclictest1213033-21systemd-journal07:46:521
729604996964,4cyclictest715475-21kworker/u8:2+flush-179:007:40:020
729604996963,4cyclictest715475-21kworker/u8:2+flush-179:007:30:230
72960499692,64cyclictest1-21systemd10:32:550
729606996858,8cyclictest1213033-21systemd-journal08:40:001
729604996861,5cyclictest770201-21kworker/u8:0+events_unbound09:20:130
729604996857,9cyclictest797809-21apt-get10:40:100
729606996762,4cyclictest762000-21kworker/u8:2+flush-179:009:15:161
729606996758,6cyclictest834401-21latency_hist12:35:011
729606996660,5cyclictest794137-21kworker/u8:3+flush-179:012:00:161
729606996659,5cyclictest794137-21kworker/u8:3+flush-179:012:10:201
729606996657,7cyclictest749005-21kworker/u8:1+flush-179:008:15:171
729604996660,4cyclictest782504-21kworker/u8:1+flush-179:010:10:200
72961099650,62cyclictest0-21swapper/211:27:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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