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2026-05-13 - 10:42

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 Wed May 13, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1380329961,33sleep00-21swapper/019:07:500
1396129777,16sleep30-21swapper/319:09:543
1371629280,8sleep20-21swapper/219:06:442
1395928568,13sleep10-21swapper/119:09:521
1406399290,4cyclictest141rcu_preempt23:00:173
14054992727,0cyclictest0-21swapper/000:11:380
14060992421,2cyclictest32-21ksoftirqd/200:30:002
1406099210,0cyclictest0-21swapper/221:05:362
1405899210,21cyclictest0-21swapper/121:32:401
1405899210,21cyclictest0-21swapper/121:28:411
1405899210,21cyclictest0-21swapper/100:38:381
1406099200,1cyclictest0-21swapper/200:05:172
1405899201,18cyclictest0-21swapper/100:15:141
1405899200,20cyclictest0-21swapper/122:52:581
1405899200,1cyclictest0-21swapper/120:05:241
14063991916,2cyclictest39-21ksoftirqd/322:56:283
1406099190,19cyclictest0-21swapper/223:35:002
14058991914,4cyclictest0-21swapper/121:44:561
14058991914,4cyclictest0-21swapper/121:44:551
1405899190,19cyclictest0-21swapper/123:40:141
1405499190,1cyclictest0-21swapper/022:23:170
1406099180,18cyclictest0-21swapper/223:10:322
1405899184,11cyclictest14405-21runrttasks21:53:011
1405899180,18cyclictest0-21swapper/121:48:021
14054991817,1cyclictest0-21swapper/023:40:230
14054991816,2cyclictest13-21ksoftirqd/000:36:500
1405499180,1cyclictest0-21swapper/023:38:560
14063991715,2cyclictest94-21kswapd021:39:013
14060991717,0cyclictest0-21swapper/222:57:142
1406099170,16cyclictest0-21swapper/223:44:312
1405899170,16cyclictest0-21swapper/123:22:401
1405499170,16cyclictest0-21swapper/023:28:270
1405499170,16cyclictest0-21swapper/022:59:260
1406399163,12cyclictest1-21systemd00:08:403
1406099169,6cyclictest1035-21packagekitd21:11:542
14060991615,1cyclictest0-21swapper/223:04:092
1406099160,0cyclictest0-21swapper/222:29:342
1405899169,5cyclictest38150irq/131-snd_hda23:10:001
14058991613,2cyclictest25-21ksoftirqd/121:11:251
1405899161,1cyclictest6651-21diskmemload23:13:331
1405499162,3cyclictest141rcu_preempt22:40:070
1405499161,12cyclictest0-21swapper/022:45:140
1405499160,3cyclictest0-21swapper/021:55:120
1405499160,1cyclictest0-21swapper/023:04:010
1405499160,1cyclictest0-21swapper/022:33:440
1405499160,12cyclictest0-21swapper/019:35:130
1406399153,7cyclictest225-21systemd-journal23:18:393
1406399153,7cyclictest225-21systemd-journal23:18:393
1406399150,1cyclictest0-21swapper/323:28:273
1406099150,15cyclictest0-21swapper/222:23:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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