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2025-09-15 - 17:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #8

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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  Congatec
Click here to display the system's profile data.
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 rackeslot8s.osadl.org (updated Mon Sep 15, 2025 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
236011399762756,5cyclictest2493773-21kworker/3:0+events09:15:223
236011399754750,3cyclictest2400076-21kworker/3:0+events07:48:563
236011399753749,3cyclictest2493773-21kworker/3:0+events11:52:093
236011399753748,4cyclictest2493773-21kworker/3:0+events11:20:223
236011399752747,4cyclictest2493773-21kworker/3:0+events11:32:303
236011399749745,3cyclictest2493773-21kworker/3:0+events11:55:413
236011399749744,4cyclictest2493773-21kworker/3:0+events10:23:033
236011399747742,4cyclictest2493773-21kworker/3:0+events12:32:553
236011399747742,4cyclictest2493773-21kworker/3:0+events12:16:583
236011399747741,5cyclictest2418448-21kworker/3:1+events07:59:193
236011399746741,4cyclictest2493773-21kworker/3:0+events10:13:353
236011399746739,6cyclictest2493773-21kworker/3:0+events11:06:093
236011399746738,5cyclictest2493773-21kworker/3:0+events12:35:533
236011399745741,3cyclictest2493773-21kworker/3:0+events11:40:423
236011399745739,5cyclictest2493773-21kworker/3:0+events12:12:213
236011399745739,5cyclictest2424689-21kworker/3:2+events08:47:423
236011399745739,5cyclictest2424689-21kworker/3:2+events08:10:443
236010799745741,3cyclictest2387124-21kworker/1:2+events07:43:371
236011399744740,3cyclictest2493773-21kworker/3:0+events10:41:583
236011399744739,4cyclictest2493773-21kworker/3:0+events11:35:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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