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2025-10-25 - 03:59

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 50.5 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 rack5slot7s.osadl.org (updated Sat Oct 25, 2025 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9758224422198,98sleep00-21swapper19:07:060
101329917921,127cyclictest12874-21apt-get22:40:230
101329916114,102cyclictest29482-21apt-get21:06:480
101329916020,27cyclictest9767-21diskstats22:20:340
101329915817,117cyclictest18972-21diskstats20:00:320
101329915815,117cyclictest12478-21fgrep22:35:590
101329915814,121cyclictest10927-21latency_hist19:15:020
101329915717,98cyclictest19195-21apt-get23:21:220
101329915716,117cyclictest21148-21apt-get20:15:410
101329915614,120cyclictest26879-21df_inode00:05:300
101329915613,41cyclictest13692-21cron19:30:010
101329915611,120cyclictest17662-21find19:50:560
101329915522,107cyclictest6431-21apt-get22:00:200
101329915514,24cyclictest14365-21munin-plugin-st22:50:010
10132991549,122cyclictest4375-21ps21:45:520
101329915418,26cyclictest15267-21apt-get22:55:200
101329915418,23cyclictest19199-21munin-run23:20:060
101329915410,120cyclictest25939-21proc_pri20:40:560
101329915318,27cyclictest24354-21apt-get23:50:170
101329915316,33cyclictest21440-21ntpq23:30:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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