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2026-04-20 - 03:16

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 Mon Apr 20, 2026 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10589312416396,13sleep10-21swapper/119:05:321
10590102398381,10sleep70-21swapper/719:06:2713
10589872375368,5sleep50-21swapper/519:06:1011
10590692372351,14sleep40-21swapper/419:06:5710
10591052368348,13sleep90-21swapper/919:07:1715
10590402365344,14sleep80-21swapper/819:06:4414
10592162362322,13sleep140-21swapper/1419:08:266
10593132358321,13sleep00-21swapper/019:09:330
10590212355335,13sleep130-21swapper/1319:06:345
10593002352332,13sleep60-21swapper/619:09:2412
10592022351333,12sleep30-21swapper/319:08:159
10591622347328,12sleep100-21swapper/1019:07:502
10591382347326,14sleep150-21swapper/1519:07:397
10592122346325,14sleep110-21swapper/1119:08:233
10593392345325,13sleep20-21swapper/219:09:518
10591342343322,14sleep120-21swapper/1219:07:374
105981099480,23cyclictest0-21swapper/1421:51:386
105981099459,11cyclictest0-21swapper/1420:34:466
1059810994330,13cyclictest0-21swapper/1420:23:476
1059810994231,0cyclictest0-21swapper/1421:07:436
1059810994040,0cyclictest0-21swapper/1420:17:416
1059767994039,1cyclictest1071626-21kworker/0:0-events20:31:540
1059810993837,1cyclictest0-21swapper/1422:10:246
105977799380,37cyclictest0-21swapper/321:50:169
1059810993737,0cyclictest0-21swapper/1419:20:256
1059810993636,0cyclictest0-21swapper/1400:32:066
105981099349,0cyclictest0-21swapper/1419:50:506
105981099349,0cyclictest0-21swapper/1419:17:526
105981099349,0cyclictest0-21swapper/1400:25:236
1059810993434,0cyclictest0-21swapper/1422:04:056
1059810993434,0cyclictest0-21swapper/1420:47:036
105981099342,32cyclictest1501ktimers/1421:42:326
1059810993333,0cyclictest0-21swapper/1419:48:366
105980599330,30cyclictest0-21swapper/1223:16:454
1059767993333,0cyclictest0-21swapper/022:07:280
1059767993332,1cyclictest1205726-21kworker/u32:3+events_unbound21:50:170
105976799330,30cyclictest0-21swapper/023:56:420
1059810993232,0cyclictest0-21swapper/1423:42:526
1059810993232,0cyclictest0-21swapper/1423:42:526
1059810993232,0cyclictest0-21swapper/1420:59:236
1059810993232,0cyclictest0-21swapper/1419:58:596
1059805993229,3cyclictest1113232-21mii-tool20:10:164
105979599329,23cyclictest0-21swapper/919:27:1415
105978299320,31cyclictest0-21swapper/422:35:1510
105977499320,29cyclictest0-21swapper/222:40:148
1059814993130,1cyclictest0-21swapper/1522:29:257
105981499310,30cyclictest0-21swapper/1520:46:047
105981099317,13cyclictest0-21swapper/1423:52:276
105981099317,13cyclictest0-21swapper/1423:52:266
1059798993129,1cyclictest1348458-21kworker/10:0+events23:37:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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