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2026-06-02 - 23:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 20 highest latencies:
System rack1slot2s.osadl.org (updated Tue Jun 02, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
651524939,0sleep30-21swapper/306:50:203
663023826,0sleep20-21swapper/206:51:392
663323423,0sleep00-21swapper/006:51:410
678523222,0sleep10-21swapper/106:53:181
6902991010,0cyclictest8360-21kworker/0:210:49:100
69029999,0cyclictest8360-21kworker/0:209:39:020
69029999,0cyclictest8360-21kworker/0:208:24:080
69029976,0cyclictest0-21swapper/012:18:000
69049960,0cyclictest0-21swapper/210:09:142
69039966,0cyclictest0-21swapper/111:06:481
69029966,0cyclictest8360-21kworker/0:207:49:070
69029966,0cyclictest8360-21kworker/0:206:59:070
69029966,0cyclictest29765-21kworker/0:011:49:080
69029966,0cyclictest29765-21kworker/0:011:39:080
69029960,0cyclictest0-21swapper/010:11:530
35160,0ktimersoftd/30-21swapper/310:10:193
339960,0migration/320418-21sh11:23:103
339960,0migration/319784-21sh10:40:133
339960,0migration/314799-21munin-node09:39:053
339960,0migration/314737-21munin-node07:44:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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