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2025-11-16 - 16:00

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 Sun Nov 16, 2025 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1207826766,0sleep20-21swapper/206:35:572
291350560,0irq/25-eth10-21swapper/306:36:063
1219824534,0sleep00-21swapper/006:37:230
1209323026,0sleep10-21swapper/106:36:081
28415070,0irq/27-eth0-tx-0-21swapper/210:21:562
28415070,0irq/27-eth0-tx-0-21swapper/008:41:180
28415070,0irq/27-eth0-tx-0-21swapper/008:25:020
249970,0watchdog/20-21swapper/211:10:072
249970,0watchdog/20-21swapper/209:46:562
124839970,0cyclictest16799-21ssh09:47:181
339960,0migration/37367-21cpuspeed_turbos07:00:033
339960,0migration/328646-21timerwakeupswit10:55:163
339960,0migration/325003-21sh09:53:203
339960,0migration/322789-21latency08:25:083
339960,0migration/310949-21kthreadcore07:50:073
28415060,0irq/27-eth0-tx-32736-21munin-node06:55:120
28415060,0irq/27-eth0-tx-23819-21ssh10:13:002
28415060,0irq/27-eth0-tx-0-21swapper/212:06:262
28415060,0irq/27-eth0-tx-0-21swapper/212:00:402
28415060,0irq/27-eth0-tx-0-21swapper/211:50:322
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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