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2025-07-07 - 01:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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.
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 rackcslot7s.osadl.org (updated Sun Jul 06, 2025 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
272532523400,8sleep00-21swapper/007:10:000
272441122520,8sleep3411rcuc/307:05:283
1623991240,22rtkit-daemon707415-21gmain08:45:273
1623991010,10rtkit-daemon1622-21rtkit-daemon07:50:163
162399900,9rtkit-daemon1622-21rtkit-daemon10:41:131
162399900,9rtkit-daemon1622-21rtkit-daemon10:41:131
28052502850,6sleep00-21swapper/010:55:150
28200092770,7sleep00-21swapper/011:35:320
272488327349,16sleep10-21swapper/107:08:451
162399700,5rtkit-daemon0-21swapper/309:34:123
162399700,5rtkit-daemon0-21swapper/309:34:123
28211722680,7sleep126-21ksoftirqd/111:40:161
28211722680,7sleep126-21ksoftirqd/111:40:161
162399650,9rtkit-daemon1622-21rtkit-daemon11:14:211
272472326439,19sleep20-21swapper/207:06:422
162399610,9rtkit-daemon1622-21rtkit-daemon09:46:560
162399590,9rtkit-daemon1622-21rtkit-daemon07:57:263
162399590,12rtkit-daemon1753-21gnome-shell11:03:132
28408002580,13sleep1251rcuc/112:35:301
162399580,8rtkit-daemon1622-21rtkit-daemon07:21:572
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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