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2024-11-22 - 06:31

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 Fri Nov 22, 2024 01:23:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2012:25:427132
21,12:25:237131
11,12:25:237130
13,12:25:237129
012:25:237125
0,12:25:237124
0,12:25:237123
0,12:25:237122
0,12:25:237121
0,12:25:237120
0,12:25:237119
0,12:25:237118
0,12:25:237117
0,12:25:237116
0,12:25:237115
0,12:25:237114
0,12:25:237113
0,12:25:237112
0,12:25:237111
0,12:25:237110
0,12:25:237109
0,12:25:237108
0,12:25:237107
0,12:25:237106
0,12:25:237105
0,12:25:237104
0,12:25:237103
0,12:25:237102
0,12:25:237101
0,12:25:237100
0,12:25:237099
0,12:25:237098
0,12:25:237097
0,12:25:237096
0,12:25:237095
0,12:25:237094
0,12:25:237093
0,12:25:237092
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0,12:25:237089
0,12:25:237088
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0,12:25:237086
0,12:25:237085
0,12:25:237084
0,12:25:237083
0,12:25:237082
0,12:25:237081
0,12:25:237080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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