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2026-04-11 - 19:42

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 Apr 11, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
97892621300,4sleep20-21swapper/210:30:222
95660821230,3sleep33056-21PK-Backend09:30:133
96368021090,5sleep33056-21PK-Backend09:50:123
99757421050,4sleep23056-21PK-Backend11:25:162
1390991030,56rtkit-daemon0-21swapper/007:09:590
10030202990,3sleep33056-21PK-Backend11:40:173
90483927947,22sleep20-21swapper/207:05:082
9961522780,3sleep33056-21PK-Backend11:20:203
9153692740,4sleep23056-21PK-Backend07:30:212
90612327039,24sleep30-21swapper/307:07:343
90599926444,13sleep10-21swapper/107:05:551
9473352520,4sleep10-21swapper/109:05:111
9739412480,4sleep33056-21PK-Backend10:20:003
9438712470,4sleep33056-21PK-Backend08:55:123
9428792460,3sleep00-21swapper/008:50:200
10097932390,2sleep10-21swapper/112:00:151
90644899338,8cyclictest955906-21chrt09:29:090
9341652290,4sleep33056-21PK-Backend08:25:173
90644899287,8cyclictest2156-21gnome-shell12:17:080
90644899274,8cyclictest921270-21cat07:50:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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