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2026-05-07 - 22:57
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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 Thu May 07, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
506495999287,4cyclictest519498-21kworker/u8:3+events_unbound08:20:010
506495998880,6cyclictest527415-21latency_hist08:15:000
506495998781,4cyclictest554985-21kworker/u8:2+events_unbound09:45:230
506497998576,6cyclictest550237-21latency_hist09:25:011
506497998560,22cyclictest586012-21/usr/sbin/munin11:15:231
506495998577,7cyclictest532427-21kworker/u8:2+events_unbound09:10:000
506497998464,18cyclictest534084-21kworker/u8:1+flush-179:008:44:591
506495998274,5cyclictest591068-21kworker/u8:1+events_unbound11:35:150
506495998074,4cyclictest525037-21kworker/u8:0+flush-179:008:10:000
506497997867,8cyclictest553395-21kworker/u8:3+flush-179:010:05:221
506495997873,4cyclictest493525-21kworker/u8:1+events_unbound08:00:230
506497997655,18cyclictest1213033-21systemd-journal11:37:051
506495997468,4cyclictest532427-21kworker/u8:2+events_unbound08:40:140
506497997357,12cyclictest1213033-21systemd-journal09:20:001
506495997364,6cyclictest525037-21kworker/u8:0+flush-179:008:25:140
506497997267,3cyclictest532427-21kworker/u8:2+flush-179:008:55:011
506495997264,6cyclictest516287-21latency_hist07:40:010
506497997161,7cyclictest583920-21kworker/u8:0+flush-179:011:20:171
506495997164,6cyclictest550909-21kworker/u8:0+flush-179:009:25:250
506495997162,6cyclictest577559-21latency_hist10:50:000
506495997162,6cyclictest577559-21latency_hist10:50:000
506495997157,4cyclictest553395-21kworker/u8:3+events_unbound09:40:000
506497997063,4cyclictest569637-21kworker/u8:2+events_unbound10:50:241
506495997064,5cyclictest608373-21kworker/u8:3+flush-179:012:30:000
506495997064,4cyclictest508014-21true07:15:010
506495997063,6cyclictest578341-21kworker/u8:0+flush-179:011:00:000
506495997063,4cyclictest509833-21kworker/u8:3+events_unbound07:30:130
506495997039,1cyclictest0-21swapper/009:44:580
506495996955,12cyclictest534084-21kworker/u8:1+flush-179:008:50:250
506497996859,7cyclictest583942-21apt-get11:10:001
506495996755,10cyclictest535641-21apt-get08:40:000
506495996657,7cyclictest558585-21cp09:50:030
506495996560,4cyclictest579133-21kworker/u8:1+flush-179:011:04:550
506495996554,9cyclictest518422-21diskstats07:45:140
506495996459,4cyclictest583920-21kworker/u8:0+flush-179:011:10:210
506495996457,5cyclictest564843-21kworker/u8:0+flush-179:010:20:210
506495996456,6cyclictest550909-21kworker/u8:0+events_unbound09:30:140
506497996357,4cyclictest534084-21kworker/u8:1+flush-179:009:34:551
506497996354,6cyclictest1213033-21systemd-journal11:27:051
506497996354,6cyclictest1213033-21systemd-journal11:27:051
506497996350,11cyclictest554985-21kworker/u8:2+flush-179:009:39:541
506495996357,5cyclictest572746-21kworker/u8:3+flush-179:010:45:000
506495996357,4cyclictest572746-21kworker/u8:3+events_unbound10:40:010
506495996356,6cyclictest594040-21kworker/u8:0+flush-179:012:10:000
506495996356,5cyclictest600638-21apt-get12:00:100
506495996351,10cyclictest590570-21apt-get11:30:000
506495996351,10cyclictest590570-21apt-get11:30:000
506497996256,5cyclictest583920-21kworker/u8:0+events_unbound11:10:231
506495996258,3cyclictest594040-21kworker/u8:0+flush-179:012:10:260
506495996256,4cyclictest534084-21kworker/u8:1+flush-179:008:45:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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