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2025-12-23 - 15:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 rack9slot4s (updated Tue Dec 23, 2025 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89509912401211,25cyclictest9142-21wget07:25:091
89509912251201,20cyclictest20888-21apt-get07:54:521
89499911611128,22cyclictest0-21swapper/007:25:110
85002545479,51sleep10-21swapper/107:20:561
88752467370,30sleep00-21swapper/007:24:520
894999205182,20cyclictest0-21swapper/007:54:530
2740821370,3sleep027404-21hddtemp_smartct08:10:180
1289521040,3sleep00-21swapper/007:30:310
118992980,2sleep011898-21sensors10:10:270
133642680,4sleep041ktimersoftd/010:45:270
8950994722,5cyclictest22-21ksoftirqd/110:11:571
15922470,5sleep0894999cyclictest11:06:590
8949994414,8cyclictest14338-21diskstats09:40:140
8949994215,7cyclictest3-21ksoftirqd/009:32:210
8949994213,16cyclictest3-21ksoftirqd/010:01:010
309512420,4sleep1895099cyclictest09:56:541
309512420,4sleep1895099cyclictest09:56:531
8949994123,6cyclictest30086-21df12:10:130
8949994116,15cyclictest3-21ksoftirqd/011:23:050
8949994115,15cyclictest3-21ksoftirqd/012:15:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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