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2024-05-25 - 07:18

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 May 25, 2024 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1324123826,0sleep00-21swapper/018:56:470
1322723625,0sleep10-21swapper/118:56:361
291350350,0irq/25-eth10-21swapper/318:55:583
709422622,0sleep20-21swapper/218:54:492
13582991212,0cyclictest698-21sensors22:10:121
135839998,0cyclictest29520-21turbostat21:09:402
28415070,0irq/27-eth0-tx-14938-21ssh20:59:590
28415070,0irq/27-eth0-tx-12967-21munin-node20:35:140
135829970,0cyclictest20104-21cut22:45:041
4160,0ktimersoftd/00-21swapper/023:46:480
339960,0migration/328966-21latency_hist21:29:403
339960,0migration/32038-21sh21:50:223
339960,0migration/318657-21latency_hist22:24:413
28415060,0irq/27-eth0-tx-482-21ssh22:52:482
28415060,0irq/27-eth0-tx-25297-21munin-node20:20:110
28415060,0irq/27-eth0-tx-13814-21munin-node19:00:010
28415060,0irq/27-eth0-tx-0-21swapper/223:54:552
28415060,0irq/27-eth0-tx-0-21swapper/223:51:372
28415060,0irq/27-eth0-tx-0-21swapper/223:40:402
28415060,0irq/27-eth0-tx-0-21swapper/223:37:512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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