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2026-07-05 - 03:02
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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 Sat Jul 04, 2026 12:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
383600999134123,8cyclictest3847357-21latency_hist07:45:001
383600799130123,5cyclictest3845805-21kworker/u8:3+events_unbound08:10:230
383600799122114,5cyclictest3904879-21kworker/u8:0+events_unbound10:50:000
383600799122112,7cyclictest3891412-21apt-get10:00:000
383600799122112,7cyclictest3844137-21latency_hist07:35:010
383600999120109,9cyclictest1213033-21systemd-journal09:00:001
383600999119108,8cyclictest3935155-21latency_hist12:15:001
38360099911899,13cyclictest1213033-21systemd-journal09:55:011
383600999114107,4cyclictest3873355-21latency_hist09:05:011
383600799114106,5cyclictest3940072-21kworker/u8:0+events_unbound12:30:250
383600799109103,4cyclictest3935191-21kworker/u8:3+flush-179:012:25:240
383600799109103,4cyclictest3922395-21kworker/u8:2+flush-179:011:35:220
383600799109101,5cyclictest3928762-21kworker/u8:0+events_unbound12:05:260
383600799109101,5cyclictest3928762-21kworker/u8:0+events_unbound12:05:250
383600799107100,5cyclictest3880017-21kworker/u8:1+events_unbound09:45:000
38360079910698,6cyclictest1213033-21systemd-journal10:15:000
38360079910697,7cyclictest3871812-21kworker/u8:3+flush-179:009:25:200
38360079910598,5cyclictest3899918-21kworker/u8:3+flush-179:010:35:240
38360079910592,10cyclictest1213033-21systemd-journal08:40:000
38360079910498,5cyclictest3837500-21kworker/u8:2+flush-179:007:35:210
38360079910498,5cyclictest3837500-21kworker/u8:2+flush-179:007:35:210
38360079910495,7cyclictest3911246-21kworker/u8:1+events_unbound11:10:010
38360079910396,5cyclictest3864845-21kworker/u8:0+flush-179:009:00:220
38360079910296,4cyclictest3880017-21kworker/u8:1+events_unbound10:05:220
38360079910296,4cyclictest3864845-21kworker/u8:0+flush-179:008:45:170
38360079910195,4cyclictest3864845-21kworker/u8:0+flush-179:008:55:220
38360079910194,5cyclictest3904879-21kworker/u8:0+flush-179:010:50:210
38360079910094,4cyclictest3857134-21kworker/u8:0+events_unbound08:15:250
3836009999984,11cyclictest3908633-21diskstats10:50:151
3836009999984,10cyclictest3916082-21kworker/u8:3+events_unbound11:35:001
3836007999994,3cyclictest3935191-21kworker/u8:3+flush-179:012:15:200
3836007999992,5cyclictest3911246-21kworker/u8:1+flush-179:011:00:210
3836007999989,7cyclictest3930391-21latency_hist12:00:020
3836007999889,7cyclictest3916082-21kworker/u8:3+flush-179:011:40:270
3836007999889,6cyclictest3871812-21kworker/u8:3+flush-179:009:05:240
3836007999790,5cyclictest3899918-21kworker/u8:3+flush-179:010:40:230
3836009999690,4cyclictest3864845-21kworker/u8:0+flush-179:008:45:251
3836009999587,5cyclictest3850527-21latency_hist07:55:021
3836007999588,5cyclictest3916082-21kworker/u8:3+flush-179:011:45:250
3836007999586,5cyclictest3899918-21kworker/u8:3+events_unbound10:25:030
3836009999385,5cyclictest3911246-21kworker/u8:1+flush-179:011:00:261
3836007999387,5cyclictest3880017-21kworker/u8:1+flush-179:009:40:010
3836007999184,5cyclictest3830943-21kworker/u8:1+flush-179:007:10:230
3836007999184,5cyclictest3830943-21kworker/u8:1+flush-179:007:10:220
3836007999181,7cyclictest3927437-21/usr/sbin/munin11:50:220
3836009998981,5cyclictest1213033-21systemd-journal07:25:431
3836009998978,7cyclictest3837500-21kworker/u8:2+flush-179:007:40:001
3836009998978,7cyclictest3837500-21kworker/u8:2+flush-179:007:40:001
3836007998982,5cyclictest3904879-21kworker/u8:0+events_unbound11:15:250
3836007998980,6cyclictest3880017-21kworker/u8:1+flush-179:009:50:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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