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2024-04-23 - 10:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #8

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 rackcslot8s.osadl.org (updated Tue Apr 23, 2024 00:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125391650,29ptp4l0-21swapper/019:05:160
1849125949,6sleep70-21swapper/719:07:397
125391590,5ptp4l932-21ksmtuned19:05:324
1845925735,7sleep10-21swapper/119:07:171
125391570,5ptp4l0-21swapper/519:07:565
1837625533,7sleep60-21swapper/619:06:176
1843025433,6sleep30-21swapper/319:06:543
1835425039,6sleep20-21swapper/219:05:572
125391340,0ptp4l0-21swapper/522:12:175
125391340,0ptp4l0-21swapper/522:12:175
125391330,0ptp4l0-21swapper/419:10:234
125391330,0ptp4l0-21swapper/400:20:224
125391330,0ptp4l0-21swapper/222:11:192
125391330,0ptp4l0-21swapper/222:11:192
125391320,0ptp4l0-21swapper/421:30:114
125391300,1ptp4l18314-21ssh22:57:360
125391300,0ptp4l0-21swapper/423:54:364
125391300,0ptp4l0-21swapper/021:39:590
125391300,0ptp4l0-21swapper/019:20:160
125391290,0ptp4l0-21swapper/523:19:555
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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