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2025-12-02 - 23:39

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 Dec 02, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1814828482,0sleep30-21swapper/306:36:453
1823023624,0sleep00-21swapper/006:37:420
1830923525,0sleep20-21swapper/206:38:362
1198623526,0sleep10-21swapper/106:34:231
18431991111,0cyclictest14992-21awk07:24:361
169970,0watchdog/10-21swapper/108:09:331
339960,0migration/36225-21sh11:36:183
339960,0migration/3484-21sh10:51:363
339960,0migration/331356-21sh08:45:513
339960,0migration/330132-21sh09:04:433
28415060,0irq/27-eth0-tx-29504-21munin-node09:49:352
28415060,0irq/27-eth0-tx-0-21swapper/212:00:052
28415060,0irq/27-eth0-tx-0-21swapper/211:39:432
28415060,0irq/27-eth0-tx-0-21swapper/211:12:112
28415060,0irq/27-eth0-tx-0-21swapper/210:44:442
28415060,0irq/27-eth0-tx-0-21swapper/210:26:532
28415060,0irq/27-eth0-tx-0-21swapper/210:19:272
28415060,0irq/27-eth0-tx-0-21swapper/210:12:522
28415060,0irq/27-eth0-tx-0-21swapper/209:35:332
28415060,0irq/27-eth0-tx-0-21swapper/209:28:512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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