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2026-05-26 - 22:09
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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 Tue May 26, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
270219999143113,20cyclictest2743833-21latency_hist09:20:011
270219799113100,9cyclictest2781076-21latency_hist11:15:020
27021999910495,7cyclictest2774340-21latency_hist10:55:001
27021999910191,7cyclictest2779345-21ldconfig11:06:341
2702197999993,5cyclictest2769616-21kworker/u8:0+events_unbound11:06:410
2702197999791,4cyclictest2699070-21kworker/u8:1+events_unbound07:30:010
2702197999674,14cyclictest1213033-21systemd-journal12:20:000
2702197999489,4cyclictest2784251-21kworker/u8:1+flush-179:012:05:250
2702197999486,6cyclictest2742233-21latency_hist09:15:010
2702197999285,5cyclictest2784255-21kworker/u8:3+flush-179:011:40:020
2702197999285,5cyclictest2784255-21kworker/u8:3+flush-179:011:40:010
2702199999186,3cyclictest2784251-21kworker/u8:1+flush-179:012:25:211
2702199999179,10cyclictest2734017-21latency_hist08:50:011
2702199999080,7cyclictest2803677-21latency_hist12:25:021
2702199999080,7cyclictest2803677-21latency_hist12:25:011
2702197999085,4cyclictest2781112-21kworker/u8:2+events_unbound11:20:240
2702199998981,6cyclictest2759755-21latency_hist10:10:011
2702199998977,9cyclictest2800235-21apt-get12:15:001
2702197998979,4cyclictest2784255-21kworker/u8:3+events_unbound11:25:240
2702197998884,3cyclictest2715144-21kworker/u8:0+events_unbound08:05:280
2702197998882,4cyclictest2751783-21kworker/u8:1+events_unbound10:00:150
2702199998675,8cyclictest2785859-21latency_hist11:30:011
2702197998679,5cyclictest2805561-21munin-run12:30:010
2702197998479,4cyclictest2769616-21kworker/u8:0+flush-179:010:55:210
2702197998478,4cyclictest2730891-21kworker/u8:3+flush-179:009:45:190
2702199998374,6cyclictest2726060-21latency_hist08:25:001
2702197998377,4cyclictest2716730-21/usr/sbin/munin07:55:230
2702197998176,4cyclictest2721255-21kworker/u8:1+events_unbound08:20:210
2702197998176,4cyclictest2719151-21kworker/u8:2+flush-179:008:10:270
2702197998176,4cyclictest2705301-21kworker/u8:2+events_unbound07:35:230
2702197998176,4cyclictest2699070-21kworker/u8:1+events_unbound07:10:240
2702199998072,6cyclictest2789293-21/usr/sbin/munin11:40:231
2702199998072,5cyclictest2784273-21latency_hist11:25:011
2702199998070,8cyclictest2779748-21apt-get11:10:111
2702197998075,4cyclictest2751783-21kworker/u8:1+events_unbound10:25:230
2702197998075,4cyclictest2727632-21kworker/u8:2+flush-179:008:30:230
2702197998074,5cyclictest2730544-21kworker/u8:0+events_unbound09:15:130
2702197998070,7cyclictest2730823-21latency_hist08:40:010
2702197997975,3cyclictest2751783-21kworker/u8:1+flush-179:010:30:240
2702197997973,4cyclictest2784251-21kworker/u8:1+flush-179:011:55:260
2702197997965,4cyclictest2784255-21kworker/u8:3+events_unbound11:40:150
2702199997866,9cyclictest2751239-21kworker/u8:0+flush-179:009:40:201
2702199997853,21cyclictest2761375-21kworker/u8:3+flush-179:010:30:011
2702197997873,4cyclictest2761375-21kworker/u8:3+events_unbound10:20:170
2702199997766,9cyclictest1213033-21systemd-journal08:30:001
2702197997772,3cyclictest2730891-21kworker/u8:3+flush-179:009:55:180
2702199997667,6cyclictest2756563-21latency_hist10:00:021
2702197997667,3cyclictest2784251-21kworker/u8:1+events_unbound12:10:270
2702197997665,4cyclictest2758755-21kworker/u8:0+events_unbound10:05:240
2702197997469,4cyclictest2769616-21kworker/u8:0+events_unbound10:50:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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