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2025-12-27 - 23:16

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 Sat Dec 27, 2025 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10408824760,8sleep20-21swapper/207:05:252
10373322240,20sleep00-21swapper/007:05:180
1114212800,4sleep00-21swapper/007:25:150
1158532790,4sleep10-21swapper/107:37:311
197399780,68rtkit-daemon0-21swapper/107:09:591
1605602730,5sleep3160561-21cpuspeed_turbos09:45:153
197399620,9rtkit-daemon1972-21rtkit-daemon09:55:230
197399610,9rtkit-daemon1972-21rtkit-daemon10:35:140
10330226142,13sleep30-21swapper/307:05:033
197399580,9rtkit-daemon1972-21rtkit-daemon08:26:050
197399550,8rtkit-daemon1972-21rtkit-daemon07:57:030
197399540,9rtkit-daemon1972-21rtkit-daemon08:32:281
104925995240,9cyclictest34-21ksoftirqd/211:55:582
197399500,7rtkit-daemon1972-21rtkit-daemon07:49:171
197399500,6rtkit-daemon1972-21rtkit-daemon08:45:570
197399500,6rtkit-daemon1972-21rtkit-daemon08:45:560
104925995025,21cyclictest151231-40lsb_release09:17:072
104921994926,18cyclictest150453-21irqstats09:15:201
1882192480,7sleep2188160-21munin-run11:05:022
1624832480,6sleep013-21ksoftirqd/009:50:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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