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2026-04-25 - 05:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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.
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 rack7slot7s.osadl.org (updated Sat Apr 25, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1330629785,8sleep20-21swapper/219:09:042
1327428572,8sleep00-21swapper/019:08:380
1323528560,9sleep30-21swapper/319:08:083
1323328058,6sleep10-21swapper/119:08:061
1347099300,29cyclictest0-21swapper/222:11:142
1346599270,27cyclictest0-21swapper/123:14:141
13465992623,2cyclictest6053-21diskmemload00:24:301
13470992524,1cyclictest0-21swapper/200:26:022
1347099250,23cyclictest0-21swapper/223:58:232
1347099250,23cyclictest0-21swapper/223:58:232
1346599250,2cyclictest0-21swapper/123:55:581
1346599250,2cyclictest0-21swapper/123:55:581
1347099230,1cyclictest0-21swapper/220:00:132
13461992322,1cyclictest0-21swapper/022:04:160
1346599213,4cyclictest25-21ksoftirqd/119:42:281
13465992111,9cyclictest6053-21diskmemload23:50:161
1346199210,21cyclictest0-21swapper/022:49:560
1347299200,1cyclictest0-21swapper/323:22:343
1347099200,20cyclictest0-21swapper/223:24:062
1346599208,11cyclictest17356-21cut00:10:161
1346199201,6cyclictest0-21swapper/023:29:360
1346199200,20cyclictest0-21swapper/022:20:500
1346199200,1cyclictest0-21swapper/000:17:260
13472991918,1cyclictest0-21swapper/321:40:143
1347099190,18cyclictest0-21swapper/221:23:182
13465991917,1cyclictest0-21swapper/122:20:001
1346599190,1cyclictest0-21swapper/121:35:421
1346599190,14cyclictest25-21ksoftirqd/123:08:201
13470991818,0cyclictest0-21swapper/222:31:142
13470991818,0cyclictest0-21swapper/222:31:132
1347099180,16cyclictest0-21swapper/223:39:302
1346599186,3cyclictest25-21ksoftirqd/121:33:591
13465991812,2cyclictest225-21systemd-journal00:07:291
1346599180,1cyclictest0-21swapper/121:10:411
13461991818,0cyclictest0-21swapper/023:07:390
13461991815,1cyclictest0-21swapper/022:35:300
1347099170,13cyclictest0-21swapper/200:09:142
1346599178,2cyclictest25-21ksoftirqd/122:21:201
13465991716,1cyclictest0-21swapper/122:35:531
13465991712,5cyclictest25-21ksoftirqd/122:25:341
13465991712,2cyclictest6053-21diskmemload22:41:391
1346599170,1cyclictest0-21swapper/123:15:071
1346599170,17cyclictest0-21swapper/119:50:121
1346199170,1cyclictest0-21swapper/000:37:210
1347099160,16cyclictest0-21swapper/223:46:322
1347099160,15cyclictest0-21swapper/221:46:352
1347099160,0cyclictest0-21swapper/200:35:312
1346599165,11cyclictest0-21swapper/121:52:541
1346599164,12cyclictest0-21swapper/121:41:091
13465991615,1cyclictest0-21swapper/100:15:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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