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2026-09-22 - 13:08

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 Tue Sep 22, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
726929481,9sleep20-21swapper/219:06:272
736829380,9sleep00-21swapper/019:07:420
725328568,13sleep10-21swapper/119:06:141
751528371,8sleep30-21swapper/319:09:373
165912750,0sleep00-21swapper/022:35:580
74862480,0sleep30-21swapper/323:29:103
763499240,23cyclictest0-21swapper/321:44:153
762499240,1cyclictest0-21swapper/023:41:330
763299210,4cyclictest0-21swapper/222:18:322
763299210,4cyclictest0-21swapper/222:18:322
762899210,19cyclictest0-21swapper/121:17:341
7624992120,1cyclictest0-21swapper/000:23:000
762499211,1cyclictest0-21swapper/022:54:460
763299201,18cyclictest23169-21hwlatdetect22:40:172
763299200,20cyclictest0-21swapper/200:16:462
763299200,18cyclictest0-21swapper/222:29:252
7628992016,3cyclictest2852-21sed23:45:191
762899200,4cyclictest0-21swapper/121:23:111
763299190,19cyclictest0-21swapper/223:59:282
7634991817,1cyclictest0-21swapper/300:29:533
763499180,11cyclictest0-21swapper/320:25:133
763299180,2cyclictest1153-21kworker/u8:200:06:112
762899181,16cyclictest0-21swapper/123:43:451
762899180,18cyclictest0-21swapper/123:24:161
762899180,17cyclictest0-21swapper/100:16:571
7624991810,8cyclictest13-21ksoftirqd/023:34:110
762499180,1cyclictest0-21swapper/021:41:070
762499180,0cyclictest0-21swapper/000:25:440
763499173,6cyclictest225-21systemd-journal20:10:003
763299170,16cyclictest0-21swapper/223:15:342
762899171,1cyclictest25180-21ssh22:21:541
762899170,0cyclictest0-21swapper/121:32:251
762499175,6cyclictest27893-21apt-get22:05:000
762499174,6cyclictest9992-21perf19:15:000
762499170,15cyclictest0-21swapper/021:45:360
7632991613,2cyclictest32-21ksoftirqd/222:54:482
763299160,2cyclictest0-21swapper/200:30:142
763299160,16cyclictest0-21swapper/221:17:222
763299160,14cyclictest0-21swapper/222:31:002
762899160,1cyclictest377-21diskmemload21:51:211
762499168,6cyclictest18279-21sh20:40:010
762499162,3cyclictest0-21swapper/020:40:140
7624991615,1cyclictest0-21swapper/022:29:500
763499158,6cyclictest5921-21grep22:30:183
763299155,3cyclictest141rcu_preempt23:12:502
763299153,1cyclictest28913-21ssh21:45:252
7632991515,0cyclictest0-21swapper/221:23:372
7632991510,2cyclictest0-21swapper/223:34:472
763299150,15cyclictest0-21swapper/223:22:482
762899159,5cyclictest16855-21wc22:55:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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