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2026-06-10 - 02:53

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 Wed Jun 10, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450560,0irq/25-eth10-21swapper/318:51:253
2165823623,0sleep00-21swapper/018:50:060
2168623523,0sleep10-21swapper/118:50:271
2156423329,0sleep20-21swapper/218:49:002
8215060,0irq/24-0000:00:18147-21munin-run23:53:072
339960,0migration/39140-21sh23:24:113
339960,0migration/32909-21sh22:21:573
339960,0migration/328227-21sh21:17:153
339960,0migration/327086-21sh22:37:033
339960,0migration/324880-21sh00:15:193
339960,0migration/317639-21sh23:51:433
339960,0migration/31213-21sh23:19:383
29715060,0irq/26-eth0-rx-5186-21interrupts21:03:233
29715060,0irq/26-eth0-rx-4571-21kthreadcore23:43:253
29715060,0irq/26-eth0-rx-25611-21yum22:53:323
29715060,0irq/26-eth0-rx-0-21swapper/300:21:463
149960,0migration/09956-21sh22:44:330
149960,0migration/09476-21sh23:25:090
149960,0migration/02574-21taskset20:59:470
149960,0migration/02574-21taskset20:59:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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