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2025-04-02 - 05:15

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 Wed Apr 02, 2025 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1134528277,0sleep00-21swapper/018:45:260
291350450,0irq/25-eth10-21swapper/318:47:513
1154723627,0sleep20-21swapper/218:47:482
1157223026,0sleep10-21swapper/118:48:031
116709977,0cyclictest0-21swapper/220:48:422
339960,0migration/38865-21sh21:41:333
339960,0migration/326710-21timerwakeupswit23:58:403
339960,0migration/324224-21munin-node21:28:373
339960,0migration/321481-21sh22:40:483
28415060,0irq/27-eth0-tx-26538-21ssh21:56:092
28415060,0irq/27-eth0-tx-24576-21ssh21:29:392
28415060,0irq/27-eth0-tx-0-21swapper/223:59:482
28415060,0irq/27-eth0-tx-0-21swapper/223:50:102
28415060,0irq/27-eth0-tx-0-21swapper/223:20:352
28415060,0irq/27-eth0-tx-0-21swapper/223:13:092
28415060,0irq/27-eth0-tx-0-21swapper/222:54:022
28415060,0irq/27-eth0-tx-0-21swapper/222:50:342
28415060,0irq/27-eth0-tx-0-21swapper/222:31:492
28415060,0irq/27-eth0-tx-0-21swapper/222:26:012
28415060,0irq/27-eth0-tx-0-21swapper/222:06:412
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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