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2026-03-21 - 14:40

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 Sat Mar 21, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450540,0irq/25-eth10-21swapper/306:59:003
2252423623,0sleep00-21swapper/006:58:310
2249223526,0sleep20-21swapper/206:58:132
1640323324,0sleep10-21swapper/106:55:561
227849976,0cyclictest27092-21ssh10:23:091
339960,0migration/39242-21munin-node10:51:053
339960,0migration/33144-21aten_r1power_vo11:10:563
339960,0migration/330189-21idleruntime09:05:573
339960,0migration/327378-21sh10:45:023
339960,0migration/319336-21sh10:39:573
339960,0migration/317443-21sh11:16:573
339960,0migration/311607-21sh09:53:093
29715060,0irq/26-eth0-rx-7906-21processes11:51:043
29715060,0irq/26-eth0-rx-634-21ssh12:30:043
29715060,0irq/26-eth0-rx-27031-21ntp_offset09:21:053
227869965,0cyclictest2273-21sadc11:30:442
227849965,0cyclictest31690-21munin-node07:56:041
227849960,0cyclictest0-21swapper/109:15:221
149960,0migration/05156-21timerwakeupswit07:56:070
149960,0migration/018924-21sh10:38:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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