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2025-09-18 - 08:42

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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.

Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.

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 rackbslot7s.osadl.org (updated Thu Sep 18, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22631210677,1052sleep017019-1kworker/0:0H19:18:010
22631210677,1052sleep017019-1kworker/0:0H19:18:010
99127957,776sleep31036-21unin-run19:52:273
1608927857,765sleep316095-21ntpq22:27:553
27592276418,732sleep027627-21memory19:32:500
27592276418,732sleep027627-21memory19:32:500
1922426056,587sleep319271-21ntpq19:07:543
167626006,579sleep31720-21ntpq19:52:523
8978252913,27sleep30-21swapper/323:47:523
24059249718,414sleep324103-21ntpq22:52:543
979524707,451sleep39839-21ntpq22:07:523
30426241633,300sleep330564-21latency_hist19:42:303
21869229420,184sleep30-21swapper/322:47:293
4795229086,95sleep30-21swapper/321:52:433
1789522769,249sleep318039-21grep22:33:003
12807225551,190sleep312847-21latency22:17:543
12807225551,190sleep312847-21latency22:17:543
1734224815,218sleep11740-21ntp_states19:52:541
13577223767,79sleep30-21swapper/320:32:293
22447223430,187sleep322592-21modprobe00:32:293
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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