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2025-12-29 - 05:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, 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.

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 rack2slot7s.osadl.org (updated Sun Dec 28, 2025 19:55:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
682395998670,9cyclictest1485049-21sort18:09:552
682395998670,9cyclictest1485049-21sort18:09:552
682393996451,9cyclictest988005-21fstime17:57:000
682395995733,14cyclictest1502780-21multi.sh18:10:362
682395995733,14cyclictest1502780-21multi.sh18:10:362
682394995747,6cyclictest962030-21sort17:42:431
682394995649,4cyclictest0-21swapper/117:49:481
682395995445,5cyclictest939170-21sh17:41:452
682393995347,4cyclictest848612-21spawn17:34:530
682393995347,4cyclictest848612-21spawn17:34:530
682394995241,5cyclictest0-21swapper/117:39:471
682393995231,17cyclictest0-21swapper/017:39:500
682395995039,6cyclictest984995-21execl17:49:522
682395994917,12cyclictest1127433-21spawn18:03:292
682393994941,5cyclictest1506580-21sort18:10:440
682393994941,5cyclictest1506580-21sort18:10:440
682393994836,9cyclictest1483063-21sh18:09:460
682393994836,9cyclictest1483063-21sh18:09:460
682394994738,5cyclictest1446542-21sh18:08:201
682394994738,5cyclictest1446542-21sh18:08:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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