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2025-08-30 - 01:00

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 Fri Aug 29, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3109524533,0sleep20-21swapper/206:38:512
291350360,0irq/25-eth10-21swapper/306:39:183
3133123122,0sleep10-21swapper/106:41:341
3130022723,0sleep00-21swapper/006:41:170
249970,0watchdog/20-21swapper/211:26:472
339960,0migration/332245-21munin-node10:48:033
339960,0migration/327455-21sh12:03:203
339960,0migration/319493-21sh08:53:133
339960,0migration/312262-21sh11:56:093
315049960,0cyclictest29796-21diskmemload11:46:122
315039960,0cyclictest29796-21diskmemload12:12:251
315039960,0cyclictest29796-21diskmemload10:38:551
28415060,0irq/27-eth0-tx-31150-21ssh10:25:582
28415060,0irq/27-eth0-tx-13414-21munin-node11:18:102
28415060,0irq/27-eth0-tx-0-21swapper/212:09:302
28415060,0irq/27-eth0-tx-0-21swapper/211:37:592
28415060,0irq/27-eth0-tx-0-21swapper/211:33:352
28415060,0irq/27-eth0-tx-0-21swapper/210:49:342
28415060,0irq/27-eth0-tx-0-21swapper/210:43:362
28415060,0irq/27-eth0-tx-0-21swapper/210:37:442
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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