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2025-11-15 - 22:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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: 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 rack4slot1s.osadl.org (updated Sat Nov 15, 2025 12:44:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1534321090,1chrt15341-21users11:59:020
1534321090,1chrt15341-21users11:59:020
182192870,2chrt18216-21apt-get09:18:441
182192870,2chrt18216-21apt-get09:18:441
295992800,2chrt29298-21apt-get08:23:361
295992800,2chrt29298-21apt-get08:23:361
12132750,3chrt2898-21cyclictest08:33:451
251512670,3chrt0-21swapper/309:33:573
251512670,3chrt0-21swapper/309:33:573
2899996619,45cyclictest0-21swapper/010:08:440
2899996619,45cyclictest0-21swapper/010:08:440
210692640,3sleep30-21swapper/307:58:543
210692640,3sleep30-21swapper/307:58:543
176732640,2sleep117674-21cut12:08:321
176732640,2sleep117674-21cut12:08:321
148612640,3sleep10-21swapper/110:33:491
148612640,3sleep10-21swapper/110:33:491
238892610,2sleep123979-21df09:33:441
238892610,2sleep123979-21df09:33:441
2899995941,13cyclictest6665-21apt-get10:13:410
2899995941,13cyclictest6665-21apt-get10:13:410
50582550,3sleep30-21swapper/310:08:463
50582550,3sleep30-21swapper/310:08:463
11842550,3sleep20-21swapper/211:23:472
11842550,3sleep20-21swapper/211:23:472
32432540,3sleep00-21swapper/011:28:520
32432540,3sleep00-21swapper/011:28:520
297192530,2chrt0-21swapper/309:48:453
297192530,2chrt0-21swapper/309:48:453
2899995337,11cyclictest2790-21apt-get10:03:440
2899995337,11cyclictest2790-21apt-get10:03:440
275232530,3sleep30-21swapper/311:08:453
275232530,3sleep30-21swapper/311:08:453
67862520,3sleep20-21swapper/208:48:462
67862520,3sleep20-21swapper/208:48:462
74392510,3sleep30-21swapper/311:38:593
74392510,3sleep30-21swapper/311:38:593
124712510,3chrt0-21swapper/209:03:452
45092500,2chrt0-21swapper/211:33:392
45092500,2chrt0-21swapper/211:33:392
2899995030,13cyclictest12338-21apt-get10:28:440
2899995030,13cyclictest12338-21apt-get10:28:440
2899995026,20cyclictest171ktimers/009:13:430
2899995026,20cyclictest171ktimers/009:13:430
260202500,3sleep30-21swapper/311:03:503
260202500,3sleep30-21swapper/311:03:503
2899994935,11cyclictest25765-21apt-get09:38:410
2899994840,4cyclictest27300-21apt-get12:33:440
2899994736,9cyclictest20124-21apt-get09:23:430
2899994736,9cyclictest20124-21apt-get09:23:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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