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2026-04-11 - 15:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot3s.osadl.org (updated Sat Apr 11, 2026 12:45:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2785390999721,38cyclictest2831893-21sh10:43:053
278538599812,75cyclictest2832771-21ssh10:45:031
278539099741,52cyclictest0-21swapper/309:10:023
278538199718,45cyclictest12-21ksoftirqd/011:05:340
278539099691,12cyclictest2802345-21cron09:35:003
2785381996826,17cyclictest28607101ssh11:50:000
278539099672,16cyclictest2834659-21ssh10:49:423
278539099672,16cyclictest2834659-21ssh10:49:413
278539099671,35cyclictest2791548-21diskmemload11:06:403
278539099662,60cyclictest2807708-21ssh09:47:133
278539099652,13cyclictest2858578-21munin-run11:45:003
278539099651,17cyclictest2847095-21sh11:18:163
2785381996516,42cyclictest131rcu_preempt10:37:400
278539099642,12cyclictest2786904-21munin-run07:40:023
278539099642,12cyclictest2786904-21munin-run07:40:013
278539099641,4cyclictest2799762-21ssh09:28:563
278539099641,4cyclictest2799762-21ssh09:28:553
278539099634,55cyclictest2878319-21ssh12:30:363
2785390996324,34cyclictest2868479-21sh12:07:433
278539099631,9cyclictest2812878-21ssh09:59:273
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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