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2025-12-15 - 00:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 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 50 highest latencies:
System rack9slot3s.osadl.org (updated Sun Dec 14, 2025 13:23:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2010:44:187132
21,10:43:597131
11,10:43:597130
13,10:43:597129
010:43:597125
0,10:43:597124
0,10:43:597123
0,10:43:597122
0,10:43:597121
0,10:43:597120
0,10:43:597119
0,10:43:597118
0,10:43:597117
0,10:43:597116
0,10:43:597115
0,10:43:597114
0,10:43:597113
0,10:43:597112
0,10:43:597111
0,10:43:597110
0,10:43:597109
0,10:43:597108
0,10:43:597107
0,10:43:597106
0,10:43:597105
0,10:43:597104
0,10:43:597103
0,10:43:597102
0,10:43:597101
0,10:43:597100
0,10:43:597099
0,10:43:597098
0,10:43:597097
0,10:43:597096
0,10:43:597095
0,10:43:597094
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0,10:43:597080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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