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2026-06-09 - 17:23

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 Jun 09, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1810823927,0sleep30-21swapper/306:53:103
1775423723,0sleep00-21swapper/006:49:030
1806123324,0sleep20-21swapper/206:52:372
1796223324,0sleep10-21swapper/106:51:281
339960,0migration/38385-21munin-node07:58:253
339960,0migration/37036-21sh09:24:313
339960,0migration/36675-21sh09:43:533
339960,0migration/35021-21munin-node11:03:303
339960,0migration/330859-21sh10:40:093
339960,0migration/330676-21sh11:42:143
339960,0migration/323471-21sh08:56:313
339960,0migration/322886-21sh11:16:473
339960,0migration/313616-21sh11:50:043
29715060,0irq/26-eth0-rx-9482-21if_eth1.209:08:273
29715060,0irq/26-eth0-rx-22555-21df08:33:233
29715060,0irq/26-eth0-rx-21313-21munin-node11:33:343
181809960,0cyclictest0-21swapper/209:12:102
181799960,0cyclictest0-21swapper/110:51:461
149960,0migration/025466-21gltestperf09:38:250
8215050,0irq/24-0000:00:31933-21idleruntime-cro10:43:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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