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2025-05-05 - 00:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 rack0slot3s.osadl.org (updated Sun May 04, 2025 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30015032256220,29sleep20-21swapper/219:06:112
30017682248208,12sleep10-21swapper/119:09:401
30017592246206,13sleep40-21swapper/419:09:354
30015972246226,13sleep30-21swapper/319:07:253
30015322237217,13sleep70-21swapper/719:06:317
29994572236219,10sleep50-21swapper/519:05:095
30014642231211,13sleep00-21swapper/019:05:360
30016542229212,11sleep60-21swapper/619:08:156
3002095993922,16cyclictest1426-21snmpd23:51:137
300209199350,34cyclictest0-21swapper/620:40:476
3002080993534,1cyclictest1426-21snmpd22:53:292
300208699340,34cyclictest0-21swapper/419:42:354
3002095993228,2cyclictest0-21swapper/723:20:037
3002084993130,1cyclictest0-21swapper/322:34:463
3002080993129,2cyclictest0-21swapper/219:46:022
3002084993027,2cyclictest1426-21snmpd22:54:023
3002084992927,2cyclictest0-21swapper/322:18:183
300207599297,1cyclictest0-21swapper/023:02:350
3002086992828,0cyclictest0-21swapper/422:49:504
3002084992827,1cyclictest1426-21snmpd23:43:233
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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