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2026-08-28 - 04:34
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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 Aug 28, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
61580599154139,12cyclictest1213033-21systemd-journal19:40:000
61580799147135,8cyclictest709222-40logrotate00:00:001
61580799147135,8cyclictest709222-40logrotate00:00:001
61580799147134,9cyclictest691214-21latency_hist23:05:011
61580599139128,7cyclictest609594-21kworker/u8:1+flush-179:019:45:000
61580799137125,11cyclictest627694-21kworker/u8:0+events_unbound20:15:011
61580599130118,9cyclictest679808-21latency_hist22:30:000
61580799125114,8cyclictest620639-21kworker/u8:0+flush-179:019:35:201
61580799117107,4cyclictest702916-21kworker/u8:0+events_unbound00:04:021
61580799116109,5cyclictest623834-21latency_hist19:35:011
61580799116107,7cyclictest652039-21kworker/u8:2+events_unbound21:10:011
61580799116107,6cyclictest704465-21latency_hist23:45:011
61580599116105,8cyclictest625415-21kworker/u8:3+flush-179:019:45:220
61580799114109,3cyclictest702916-21kworker/u8:0+flush-179:000:05:141
61580799113103,7cyclictest684589-21latency_hist22:45:021
61580799112103,6cyclictest655923-21latency_hist21:15:001
61580599112101,8cyclictest689641-21latency_hist23:00:010
6158079911197,11cyclictest686176-21apt-get22:49:591
61580799111102,6cyclictest665480-21kworker/u8:1+events_unbound22:10:201
61580799110102,5cyclictest684618-21kworker/u8:2+flush-179:023:10:151
61580799110102,5cyclictest684618-21kworker/u8:2+flush-179:023:10:141
6158079910998,8cyclictest683011-21latency_hist22:40:011
61580799109103,4cyclictest625415-21kworker/u8:3+events_unbound19:50:001
6158059910999,7cyclictest654079-21latency_hist21:10:020
61580599109101,6cyclictest698356-21apt-get23:25:110
6158059910899,5cyclictest668637-21kworker/u8:2+events_unbound22:05:270
61580799107100,6cyclictest3998662-21kworker/u8:5+flush-179:019:10:041
6158059910797,7cyclictest639761-21latency_hist20:25:010
6158059910795,9cyclictest683262-21apt-get22:40:110
6158079910699,5cyclictest632860-21kworker/u8:2+flush-179:020:00:241
6158079910699,5cyclictest609594-21kworker/u8:1+events_unbound19:15:251
6158059910697,7cyclictest722388-21kworker/u8:3+events_unbound00:40:010
6158079910596,6cyclictest665479-21kworker/u8:0+events_unbound21:50:211
6158079910595,7cyclictest702916-21kworker/u8:0+flush-179:000:20:151
6158059910497,5cyclictest655958-21kworker/u8:0+flush-179:021:35:140
6158059910492,9cyclictest641605-21apt-get20:30:120
6158079910397,4cyclictest638145-21kworker/u8:2+flush-179:020:20:241
6158079910396,5cyclictest665480-21kworker/u8:1+events_unbound21:45:251
6158079910392,9cyclictest1213033-21systemd-journal20:30:231
6158079910293,6cyclictest688019-21latency_hist22:55:001
6158059910295,5cyclictest684618-21kworker/u8:2+flush-179:023:20:160
6158059910295,4cyclictest694635-21kworker/u8:1+events_unbound23:40:000
615807999993,4cyclictest702916-21kworker/u8:0+flush-179:000:35:221
615805999989,7cyclictest676620-21latency_hist22:20:020
615805999792,4cyclictest702916-21kworker/u8:0+events_unbound00:25:000
615805999789,6cyclictest702916-21kworker/u8:0+flush-179:000:10:220
615805999684,9cyclictest1213033-21systemd-journal23:20:000
615805999586,6cyclictest668637-21kworker/u8:2+flush-179:022:00:190
615805999585,8cyclictest3998662-21kworker/u8:5+events_unbound19:15:000
615807999487,5cyclictest630232-21kworker/u8:1+events_unbound19:55:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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