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2026-03-17 - 15:11
OSADL QA Farm

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 Mar 17, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
71734799114104,7cyclictest752774-21latency_hist21:00:011
7173479910692,10cyclictest760732-21latency_hist21:25:011
7173479910692,10cyclictest266-21systemd-journal00:00:021
7173459910597,6cyclictest721118-21kworker/u8:0+events_unbound20:25:010
7173459910094,5cyclictest785883-21kworker/u8:0+events_unbound22:55:010
717345999891,5cyclictest738428-21kworker/u8:1+flush-179:020:25:230
717345999888,7cyclictest751175-21latency_hist20:55:010
717347999685,8cyclictest764167-21latency_hist21:35:011
717345999687,7cyclictest266-21systemd-journal22:40:000
717345999684,4cyclictest760220-21kworker/u8:1+flush-179:021:20:230
717345999484,8cyclictest266-21systemd-journal20:05:000
717345999388,4cyclictest771026-21kworker/u8:1+events_unbound22:10:230
717347999283,7cyclictest746427-21latency_hist20:40:011
717345999285,5cyclictest725455-21kworker/u8:2+events_unbound19:50:240
717345998781,4cyclictest809993-21kworker/u8:0+flush-179:023:55:230
717347998675,8cyclictest266-21systemd-journal20:20:001
717345998679,6cyclictest721118-21kworker/u8:0+events_unbound19:55:030
717347998458,23cyclictest813012-21latency_hist00:05:001
717345998376,5cyclictest796226-21kworker/u8:1+events_unbound23:20:000
717345998275,5cyclictest814914-21kworker/u8:1+flush-179:000:15:220
717345998172,7cyclictest814847-21kworker/u8:0+flush-179:000:40:010
71734599811,77cyclictest1-21systemd23:55:000
717345998074,4cyclictest761251-21kworker/u8:2+flush-179:021:30:230
717345998072,6cyclictest749624-21kworker/u8:2+flush-179:021:05:210
717345997973,5cyclictest781910-21kworker/u8:1+events_unbound22:30:010
717345997873,4cyclictest772620-21kworker/u8:0+flush-179:022:00:020
717345997670,4cyclictest796802-21kworker/u8:3+events_unbound23:45:010
717345997570,4cyclictest704638-21kworker/u8:3+flush-179:019:15:000
717345997568,6cyclictest803116-21kworker/u8:2+flush-179:023:50:010
717347997467,5cyclictest785883-21kworker/u8:0+flush-179:023:05:011
717345997469,4cyclictest743264-21kworker/u8:2+flush-179:020:35:250
717345997368,4cyclictest796226-21kworker/u8:1+events_unbound23:25:230
717345997365,6cyclictest803137-21latency_hist23:35:010
717345997265,5cyclictest725455-21kworker/u8:2+events_unbound19:40:150
717345997265,5cyclictest721118-21kworker/u8:0+flush-179:019:20:210
717345997263,7cyclictest266-21systemd-journal19:30:010
717347997156,12cyclictest803116-21kworker/u8:2+flush-179:023:45:011
717345997165,5cyclictest738428-21kworker/u8:1+events_unbound20:15:000
717345997165,4cyclictest704638-21kworker/u8:3+events_unbound19:30:010
717345997164,6cyclictest764146-21kworker/u8:1+flush-179:021:40:010
717345997063,5cyclictest814847-21kworker/u8:0+events_unbound00:20:240
717345997063,5cyclictest721118-21kworker/u8:0+events_unbound20:45:000
717345997063,4cyclictest725455-21kworker/u8:2+flush-179:019:45:160
717345997061,6cyclictest785883-21kworker/u8:0+flush-179:023:10:190
717345996962,5cyclictest811623-21kworker/u8:4+flush-179:000:04:010
717347996860,6cyclictest728659-21latency_hist19:45:001
717347996859,6cyclictest796802-21kworker/u8:3+events_unbound00:05:011
717345996750,13cyclictest769214-21apt-get21:50:000
71735099660,63cyclictest0-21swapper/222:43:002
717347996659,5cyclictest782488-21kworker/u8:2+events_unbound22:35:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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