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2026-04-22 - 21:50

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 Wed Apr 22, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30672642990,3sleep20-21swapper/212:00:132
139099860,52rtkit-daemon0-21swapper/107:08:201
296322327753,18sleep00-21swapper/007:06:030
296336526444,14sleep20-21swapper/207:07:542
296325826443,14sleep30-21swapper/307:06:313
30220472530,4sleep33056-21PK-Backend09:50:233
30387342500,3sleep10-21swapper/110:40:011
30750202440,2sleep33056-21PK-Backend12:20:193
139099440,3rtkit-daemon0-21swapper/110:42:181
30009832410,4sleep33056-21PK-Backend08:55:003
30132392310,2sleep00-21swapper/009:25:220
139099310,5rtkit-daemon1389-21rtkit-daemon11:40:520
296368099259,14cyclictest3056-21PK-Backend10:59:073
2963670992514,8cyclictest883-21dbus-daemon12:05:010
296367099250,8cyclictest3038838-21taskset10:40:120
139099250,4rtkit-daemon1389-21rtkit-daemon12:10:441
29716322240,3sleep33056-21PK-Backend07:30:123
2963670992421,2cyclictest161rcuc/011:28:190
2963670992417,6cyclictest3045479-21cron10:59:590
139099240,15rtkit-daemon0-21swapper/108:55:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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