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2025-12-10 - 00:39

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 Dec 09, 2025 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1062726766,0sleep20-21swapper/206:35:072
1067726564,0sleep10-21swapper/106:35:381
291350350,0irq/25-eth10-21swapper/306:34:583
1069123430,0sleep00-21swapper/006:35:490
11032991616,0cyclictest18089-21sensors10:24:230
28415070,0irq/27-eth0-tx-0-21swapper/007:31:110
35160,0ktimersoftd/30-21swapper/311:44:313
339960,0migration/34437-21munin-node09:34:223
339960,0migration/332391-21sh11:59:373
339960,0migration/327225-21sh10:09:423
339960,0migration/321459-21kthreadcore10:49:183
339960,0migration/321226-21sh09:46:553
339960,0migration/320083-21sh10:07:063
339960,0migration/319076-21sh10:26:223
339960,0migration/315834-21munin-node08:39:243
339960,0migration/313662-21sh09:19:213
339960,0migration/311924-21missed_timers07:24:183
28415060,0irq/27-eth0-tx-8522-21perl09:19:122
28415060,0irq/27-eth0-tx-5571-21munin-node06:59:120
28415060,0irq/27-eth0-tx-0-21swapper/212:06:362
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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