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2026-03-18 - 04:49
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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 Wed Mar 18, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
350757199112104,6cyclictest3558645-21apt-get21:50:031
350756899109101,6cyclictest3515393-21kworker/u8:1+events_unbound20:00:000
35075719910283,13cyclictest266-21systemd-journal22:25:001
3507568999991,7cyclictest3570066-21kworker/u8:0+flush-179:023:30:240
3507571999785,10cyclictest3560451-21kworker/u8:1+flush-179:022:20:001
3507571999785,10cyclictest3560451-21kworker/u8:1+flush-179:022:20:001
3507568999782,11cyclictest266-21systemd-journal00:00:000
3507571999585,7cyclictest3510637-21latency_hist19:20:001
3507571999381,8cyclictest3587506-21kworker/u8:1+flush-179:023:25:001
3507571999281,8cyclictest3592534-21/usr/sbin/munin23:35:251
3507568999285,5cyclictest3592285-21kworker/u8:1+events_unbound00:05:240
3507568999070,13cyclictest3549131-21kworker/u8:3+events_unbound21:40:240
3507571998978,7cyclictest3545640-21latency_hist21:10:011
3507568998771,12cyclictest3593888-21apt-get23:40:000
3507571998662,21cyclictest3610118-21latency_hist00:30:011
3507568998577,5cyclictest3515393-21kworker/u8:1+flush-179:019:45:020
3507568998575,8cyclictest3537929-21kworker/u8:0+flush-179:021:00:010
3507568998575,7cyclictest3537929-21kworker/u8:0+flush-179:020:45:200
3507568998377,4cyclictest3576436-21kworker/u8:2+events_unbound22:45:010
3507568998377,4cyclictest3576436-21kworker/u8:2+events_unbound22:45:010
3507568998374,6cyclictest3570066-21kworker/u8:0+flush-179:023:00:000
3507568998374,6cyclictest3544104-21kworker/u8:2+flush-179:021:15:180
350756899830,81cyclictest3611751-21munin-run00:35:010
3507568998274,6cyclictest3528134-21latency_hist20:15:010
3507571998166,12cyclictest3526584-21kworker/u8:0+flush-179:020:15:011
3507568997869,7cyclictest3531364-21kworker/u8:1+events_unbound20:45:010
3507568997770,5cyclictest3570066-21kworker/u8:0+events_unbound22:35:230
3507571997666,7cyclictest266-21systemd-journal00:04:011
3507568997670,4cyclictest3544104-21kworker/u8:2+events_unbound21:50:020
3507568997664,5cyclictest3517059-21kworker/u8:3+events_unbound20:05:240
3507568997569,4cyclictest3521747-21kworker/u8:2+events_unbound19:55:000
3507568997469,3cyclictest3570066-21kworker/u8:0+events_unbound23:40:190
3507568997266,4cyclictest3587506-21kworker/u8:1+events_unbound23:20:240
3507568997262,7cyclictest3608534-21latency_hist00:25:010
3507568997166,4cyclictest3584378-21kworker/u8:2+events_unbound23:10:230
3507568997162,6cyclictest3507465-21kworker/u8:3+flush-179:019:20:150
3507571997061,6cyclictest266-21systemd-journal19:57:241
3507568997064,4cyclictest3560508-21kworker/u8:3+flush-179:022:05:000
3507568997063,5cyclictest3592285-21kworker/u8:1+flush-179:000:00:240
3507568997061,7cyclictest3531364-21kworker/u8:1+flush-179:020:35:200
3507568997058,5cyclictest3544104-21kworker/u8:2+events_unbound21:50:230
3507568996963,5cyclictest3537929-21kworker/u8:0+flush-179:021:00:240
3507568996963,5cyclictest3537929-21kworker/u8:0+flush-179:021:00:240
3507571996858,8cyclictest3613303-21apt-get00:36:341
3507568996860,6cyclictest3587519-21latency_hist23:20:010
3507571996751,14cyclictest0-21swapper/122:33:001
3507568996761,4cyclictest3515393-21kworker/u8:1+flush-179:019:45:200
3507568996756,8cyclictest266-21systemd-journal20:20:000
3507568996660,5cyclictest3560451-21kworker/u8:1+flush-179:022:30:240
3507568996657,7cyclictest266-21systemd-journal22:00:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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