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2025-11-17 - 19:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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.
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 20 highest latencies:
System rackfslot7s.osadl.org (updated Mon Nov 17, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
168035199295414,2935cyclictest1735141-21kworker/2:1+events22:20:182
168035199294714,2930cyclictest1770069-21kworker/2:2+events00:05:192
16803519929378,2926cyclictest1770069-21kworker/2:2+events00:00:202
168035199273413,2717cyclictest1700906-21kworker/2:1+events21:20:252
168035499272116,2699cyclictest1706082-21kworker/3:0+events21:00:153
168034999268813,2673cyclictest1710918-21kworker/1:2+events20:55:171
168034499261513,2599cyclictest1776578-21kworker/0:1+events00:10:160
16803549925598,2546cyclictest1779720-21kworker/3:2+events00:30:173
168034499249312,2478cyclictest1758667-21kworker/0:2+events23:31:110
168034499249312,2478cyclictest1758667-21kworker/0:2+events23:19:510
168034499248912,2474cyclictest1771870-21kworker/0:2+events00:03:230
168034499248912,2474cyclictest1725474-21kworker/0:1+events21:40:530
168035499248612,2471cyclictest1697937-21kworker/3:1+events20:05:013
168034499248612,2471cyclictest1761897-21kworker/0:0+events23:22:510
168034499248612,2471cyclictest1715867-21kworker/0:0+events21:04:430
168034499248512,2469cyclictest1770277-21kworker/0:0+events23:57:160
168035499247112,2455cyclictest1720686-21kworker/3:2+events21:15:243
168035199245112,2436cyclictest1763528-21kworker/2:0+events23:40:172
168034499244610,2432cyclictest1780503-21kworker/0:0+events00:35:540
168035199244312,2427cyclictest1750874-21kworker/2:0+events23:15:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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