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2025-11-15 - 22:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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.

Total number of samples: 50 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 rack9slot8s.osadl.org (updated Sat Nov 15, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819502910,0irq/47-4a1000009-21ksoftirqd/007:05:100
1534328610,0sleep015351-21sh10:17:280
81950690,0irq/47-4a10000021366-21ssh10:30:090
101690,0ktimersoftd/011953-21ssh11:19:260
81950670,0irq/47-4a10000031844-1kworker/u3:012:01:280
101670,0ktimersoftd/09676-21diskmemload12:23:150
101670,0ktimersoftd/029309-21sh11:56:030
81950660,0irq/47-4a10000032133-21ssh09:44:120
81950660,0irq/47-4a1000002083-21ssh10:58:210
81950660,0irq/47-4a10000015646-21ssh11:27:080
81950660,0irq/47-4a10000012767-21ssh10:12:060
30025996630,0cyclictest4433-21ssh12:11:580
81950650,0irq/47-4a1000009443-21ssh11:14:040
81950650,0irq/47-4a1000009-21ksoftirqd/009:15:410
81950650,0irq/47-4a10000029405-1kworker/u3:307:16:400
81950650,0irq/47-4a1000002404-21ssh12:07:390
81950650,0irq/47-4a10000023351-21ssh11:43:380
81850650,0irq/46-4a10000024392-1kworker/u3:411:45:410
81850650,0irq/46-4a1000000-21swapper11:30:200
101650,0ktimersoftd/03938-21ssh09:53:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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