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2026-04-15 - 11:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 50 highest latencies:
System rack0slot4s.osadl.org (updated Wed Apr 15, 2026 00:45:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5590842371363,5sleep140-21swapper/1419:07:356
5591252367359,5sleep80-21swapper/819:08:0114
5591362366359,5sleep00-21swapper/019:08:090
5592682363326,12sleep60-21swapper/619:09:5112
5591472363354,6sleep90-21swapper/919:08:1815
5592562355335,13sleep110-21swapper/1119:09:403
5590632354334,13sleep130-21swapper/1319:07:185
5592632352332,13sleep10-21swapper/119:09:461
5591592352341,7sleep30-21swapper/319:08:289
5590552351332,12sleep50-21swapper/519:07:0911
5589912351332,13sleep20-21swapper/219:06:198
5589422351332,12sleep120-21swapper/1219:05:404
5592372350331,13sleep150-21swapper/1519:09:287
5589312350330,13sleep70-21swapper/719:05:3513
5589932349330,13sleep40-21swapper/419:06:2010
5589812346327,13sleep100-21swapper/1019:06:102
55980599457,25cyclictest0-21swapper/1400:20:206
55980599420,28cyclictest0-21swapper/1423:47:236
55980599420,24cyclictest0-21swapper/1419:23:476
55980599410,28cyclictest0-21swapper/1423:14:266
55980599410,28cyclictest0-21swapper/1423:03:276
55980599410,28cyclictest0-21swapper/1421:24:366
55980599410,27cyclictest0-21swapper/1420:07:436
55980599410,27cyclictest0-21swapper/1419:34:466
55980599400,27cyclictest0-21swapper/1423:36:256
55980599400,27cyclictest0-21swapper/1421:35:356
55980599400,27cyclictest0-21swapper/1420:51:406
55980599400,27cyclictest0-21swapper/1420:18:426
55980599400,27cyclictest0-21swapper/1419:12:486
55980599387,18cyclictest0-21swapper/1423:58:226
55980599380,24cyclictest0-21swapper/1420:40:406
55980599370,24cyclictest0-21swapper/1422:41:296
55980599350,24cyclictest0-21swapper/1423:25:256
559796993429,4cyclictest871775-21mii-tool23:50:133
559789993434,0cyclictest0-21swapper/921:45:2315
559789993433,1cyclictest0-21swapper/922:51:4715
559796993330,3cyclictest0-21swapper/1119:59:503
559789993333,0cyclictest0-21swapper/922:20:3115
559789993333,0cyclictest0-21swapper/920:24:1515
559789993333,0cyclictest0-21swapper/900:29:2415
55978999333,29cyclictest1051ktimers/900:10:1315
559789993332,1cyclictest0-21swapper/922:42:3715
55976599330,30cyclictest0-21swapper/120:20:151
55980799320,29cyclictest0-21swapper/1520:50:157
55979499320,29cyclictest0-21swapper/1021:10:162
559789993232,0cyclictest0-21swapper/922:09:1515
559789993232,0cyclictest0-21swapper/921:11:0915
559789993232,0cyclictest0-21swapper/919:40:1515
559789993231,1cyclictest800640-21kworker/u32:1+events_unbound23:05:1815
55980599310,30cyclictest0-21swapper/1422:37:096
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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