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2025-11-28 - 19:56

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 rack7slot4s.osadl.org (updated Fri Nov 28, 2025 12:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2761399693,42cyclictest8870-21ssh12:00:122
2760599686,48cyclictest4663-21ssh10:30:151
27621996450,5cyclictest29566irq/58-eth011:30:133
2760599614,45cyclictest14982-21ssh12:25:101
2761399607,15cyclictest131rcu_preempt09:00:132
2761399573,17cyclictest131rcu_preempt11:05:132
2760599540,44cyclictest7579-21ssh12:20:141
2760599523,36cyclictest13495-21ssh11:20:121
2760599492,33cyclictest4602-21ssh09:25:121
2761399483,20cyclictest27-21ksoftirqd/208:40:122
27613994810,31cyclictest27-21ksoftirqd/207:30:122
2761399461,30cyclictest32463-21ssh11:10:122
2760599464,34cyclictest18375-21ssh11:45:161
27613994526,11cyclictest0-21swapper/211:30:132
2761399441,27cyclictest27120-21ssh10:45:152
2761399441,24cyclictest11179-21ssh11:40:132
27605994311,20cyclictest21-21ksoftirqd/107:50:131
2759499413,34cyclictest19393-21ssh09:35:150
2760599405,26cyclictest13850-21diskmemload12:05:161
2761399393,13cyclictest0-21swapper/212:25:122
2761399392,19cyclictest6996-21ps10:10:192
27594993814,19cyclictest14209-21ssh09:10:100
27613993722,10cyclictest31164-21ssh12:13:392
2761399372,18cyclictest15771-21ssh10:35:262
2761399372,18cyclictest14318-21cat10:55:292
27594993719,11cyclictest12-21ksoftirqd/008:35:110
27594993714,17cyclictest32377-21ssh12:15:130
27594993616,15cyclictest12-21ksoftirqd/011:05:120
27621993515,10cyclictest29566irq/58-eth010:50:143
2761399352,17cyclictest21511-21awk11:00:302
27613993513,16cyclictest27-21ksoftirqd/209:45:132
2760599356,19cyclictest73-21kswapd011:00:141
27605993426,3cyclictest32623-21apt-get07:15:121
27605993421,9cyclictest32362-21apt-get12:15:111
2759499343,20cyclictest12-21ksoftirqd/009:50:130
27621993317,9cyclictest29566irq/58-eth011:45:153
2761399322,19cyclictest26764-21ssh09:40:142
2761399322,19cyclictest26764-21ssh09:40:132
2761399322,14cyclictest25449-21ssh10:42:392
27605993225,3cyclictest6915-21apt-get11:15:131
27605993222,5cyclictest1605-21apt-get09:45:141
2762199315,21cyclictest29566irq/58-eth009:30:133
2762199313,12cyclictest29566irq/58-eth011:20:143
2761399313,17cyclictest26346irq/40-dwc2_hso09:55:132
27613993117,7cyclictest629-21Async14:00:482
2762199301,19cyclictest29566irq/58-eth008:10:113
27613993023,2cyclictest0-21swapper/209:20:122
2761399302,21cyclictest0-21swapper/210:20:122
2761399302,21cyclictest0-21swapper/207:35:132
2761399302,15cyclictest3620-21ssh11:35:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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