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2025-01-13 - 12:02

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 Mon Jan 13, 2025 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
286532630,0sleep30-21swapper/323:10:093
1902226251,7sleep70-21swapper/719:06:477
132091620,5ptp4l0-21swapper/519:08:165
132091610,30ptp4l0-21swapper/019:07:440
132091600,29ptp4l0-21swapper/119:07:031
1924725937,6sleep30-21swapper/319:09:403
1925925443,6sleep60-21swapper/619:09:516
1893125140,6sleep20-21swapper/219:05:382
132091500,5ptp4l0-21swapper/419:07:464
132091350,0ptp4l0-21swapper/100:27:241
132091330,0ptp4l0-21swapper/120:20:131
1956299329,1cyclictest30410-21kworker/5:022:56:165
19562993214,1cyclictest30410-21kworker/5:022:54:435
19562993214,1cyclictest30410-21kworker/5:022:40:305
132091320,0ptp4l0-21swapper/123:51:221
132091310,0ptp4l0-21swapper/519:40:145
132091310,0ptp4l0-21swapper/123:57:211
132091310,0ptp4l0-21swapper/123:57:211
132091310,0ptp4l0-21swapper/123:07:031
132091310,0ptp4l0-21swapper/122:18:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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