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2025-11-29 - 00:06

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 Fri Nov 28, 2025 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291350550,0irq/25-eth10-21swapper/306:34:403
2180523724,0sleep00-21swapper/006:35:240
2204823625,0sleep10-21swapper/106:38:131
2197923424,0sleep20-21swapper/206:37:262
28415070,0irq/27-eth0-tx-828-21grep10:29:412
28415070,0irq/27-eth0-tx-0-21swapper/007:14:340
339960,0migration/329078-21sh10:48:293
339960,0migration/326875-21sh09:01:383
339960,0migration/326507-21sh11:28:313
339960,0migration/325914-21sh09:21:373
339960,0migration/325211-21runrttasks11:47:123
339960,0migration/312230-21sh10:58:373
339960,0migration/312221-21aten_r1power_cu08:54:333
28415060,0irq/27-eth0-tx-6551-21munin-node08:04:370
28415060,0irq/27-eth0-tx-15744-21munin-node10:19:432
28415060,0irq/27-eth0-tx-14215-21munin-node08:34:470
28415060,0irq/27-eth0-tx-1180-21ssh11:30:572
28415060,0irq/27-eth0-tx-0-21swapper/212:04:422
28415060,0irq/27-eth0-tx-0-21swapper/212:01:382
28415060,0irq/27-eth0-tx-0-21swapper/211:56:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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