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2025-11-09 - 12:37

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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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 50 highest latencies:
System rackeslot8s.osadl.org (updated Sun Nov 09, 2025 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
793356992522,1cyclictest0-21swapper/300:00:003
79335699232,8cyclictest8507052sleep319:55:123
793356991916,1cyclictest0-21swapper/322:50:013
793356991916,1cyclictest0-21swapper/321:40:163
793356991916,1cyclictest0-21swapper/321:00:013
793356991815,1cyclictest0-21swapper/319:40:183
793356991714,1cyclictest0-21swapper/319:40:003
79335699161,5cyclictest11984732sleep323:50:153
79335699161,5cyclictest11423142sleep323:15:133
793356991613,1cyclictest0-21swapper/322:10:143
793356991613,1cyclictest0-21swapper/321:50:003
793356991613,1cyclictest0-21swapper/300:05:193
793356991512,1cyclictest0-21swapper/322:30:183
793356991512,1cyclictest0-21swapper/321:20:183
793356991512,1cyclictest0-21swapper/320:40:143
793356991512,1cyclictest0-21swapper/319:10:483
793356991511,1cyclictest0-21swapper/323:00:003
157898150,3rtkit-daemon98157-21packagekitd19:42:382
157898150,3rtkit-daemon538-21gmain00:37:021
79335699148,3cyclictest0-21swapper/321:40:003
79335699141,9cyclictest936342-21taskset21:00:223
793356991411,1cyclictest0-21swapper/323:10:193
793356991411,1cyclictest0-21swapper/322:30:003
793356991411,1cyclictest0-21swapper/321:55:003
793356991411,1cyclictest0-21swapper/321:25:143
793356991411,1cyclictest0-21swapper/320:35:133
793356991411,1cyclictest0-21swapper/320:26:283
793356991411,1cyclictest0-21swapper/320:04:063
793356991411,1cyclictest0-21swapper/319:25:193
793356991411,1cyclictest0-21swapper/319:20:203
793356991411,1cyclictest0-21swapper/300:20:173
793356991411,1cyclictest0-21swapper/300:00:413
11803322140,4sleep134-21ksoftirqd/123:36:021
9747872130,5sleep1974793-21ssh21:29:551
79335699139,2cyclictest0-21swapper/323:30:003
79335699131,9cyclictest878173-21taskset20:15:193
79335699131,9cyclictest878173-21taskset20:15:193
793356991310,1cyclictest0-21swapper/323:30:193
793356991310,1cyclictest0-21swapper/321:10:193
793356991310,1cyclictest0-21swapper/319:52:063
793356991310,1cyclictest0-21swapper/300:30:183
157898130,9rtkit-daemon1156618-21ssh23:21:551
9004852120,2sleep1321rcuc/120:35:161
79335699129,1cyclictest0-21swapper/323:42:313
79335699129,1cyclictest0-21swapper/323:35:183
79335699129,1cyclictest0-21swapper/323:05:223
79335699129,1cyclictest0-21swapper/323:00:163
79335699129,1cyclictest0-21swapper/322:50:173
79335699129,1cyclictest0-21swapper/322:15:163
79335699129,1cyclictest0-21swapper/322:00:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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