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2026-05-26 - 20:49

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 May 26, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
599923826,0sleep20-21swapper/206:52:072
304450350,0irq/25-eth10-21swapper/306:49:463
611423430,0sleep10-21swapper/106:53:301
583423127,0sleep00-21swapper/006:50:120
62869976,0cyclictest0-21swapper/107:54:551
62879960,0cyclictest188132sleep212:03:282
62869960,0cyclictest0-21swapper/111:06:471
339960,0migration/320468-21sh09:03:483
339960,0migration/319088-21sh10:00:263
339960,0migration/314727-21missed_timers08:09:493
29715060,0irq/26-eth0-rx-26432-21sh07:29:543
29715060,0irq/26-eth0-rx-0-21swapper/311:32:233
19160,0ktimersoftd/10-21swapper/111:41:191
19160,0ktimersoftd/10-21swapper/110:14:261
149960,0migration/025680-21needreboot11:04:490
149960,0migration/013970-21kthreadcore08:09:490
149960,0migration/010789-21munin-node09:14:530
62879955,0cyclictest0-21swapper/209:43:002
62879954,0cyclictest11328-21awk08:34:462
62879950,0cyclictest0-21swapper/211:48:392
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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