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2026-09-08 - 08:16

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 08, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5429210863,33sleep00-21swapper/019:08:180
528728760,9sleep30-21swapper/319:06:293
522428370,9sleep20-21swapper/219:05:392
553427767,6sleep10-21swapper/119:09:391
280652580,0sleep10-21swapper/119:55:151
565499240,2cyclictest0-21swapper/300:20:193
565099237,15cyclictest0-21swapper/222:01:242
564499225,15cyclictest31295-21diskmemload23:30:130
564499225,15cyclictest31295-21diskmemload23:30:120
5644992218,3cyclictest7622-21ssh00:08:430
565099217,13cyclictest56550irq/124-enp0s3120:31:192
565099210,20cyclictest56550irq/124-enp0s3120:22:232
5646992119,2cyclictest0-21swapper/122:42:221
565499204,9cyclictest0-21swapper/321:00:163
5650992017,3cyclictest0-21swapper/221:13:132
5650992016,4cyclictest0-21swapper/222:30:332
564699201,2cyclictest24571-21ssh23:59:491
564699200,1cyclictest0-21swapper/123:54:171
564499208,6cyclictest9625-21perf20:25:000
5654991916,2cyclictest0-21swapper/300:07:173
565099190,19cyclictest0-21swapper/221:26:442
5654991815,2cyclictest18355-21apt-get22:00:113
565499180,18cyclictest0-21swapper/323:57:533
565099181,16cyclictest21954-21apt-get23:00:132
5646991817,1cyclictest0-21swapper/122:08:001
5646991817,1cyclictest0-21swapper/100:01:411
5646991811,7cyclictest0-21swapper/122:49:321
564699181,15cyclictest0-21swapper/122:25:281
5650991716,1cyclictest0-21swapper/222:42:182
5650991714,3cyclictest22830-21kworker/u8:021:49:432
564699174,5cyclictest0-21swapper/120:20:121
5646991715,1cyclictest0-21swapper/123:45:211
564699171,15cyclictest31295-21diskmemload23:03:021
564699170,11cyclictest0-21swapper/123:05:141
564499170,16cyclictest0-21swapper/023:25:430
565499169,3cyclictest0-21swapper/322:32:443
565499161,1cyclictest0-21swapper/321:55:163
565099160,15cyclictest56550irq/124-enp0s3120:02:592
564699162,14cyclictest3658-21ssh22:10:201
5646991615,1cyclictest0-21swapper/119:35:141
5646991613,2cyclictest32492-21sh20:05:001
5644991613,1cyclictest0-21swapper/021:42:020
564499160,15cyclictest0-21swapper/021:19:190
564499160,15cyclictest0-21swapper/000:11:140
565099154,2cyclictest141rcu_preempt22:09:422
5650991512,3cyclictest0-21swapper/221:22:132
565099150,14cyclictest0-21swapper/223:15:142
5646991513,2cyclictest0-21swapper/122:51:461
564699150,14cyclictest0-21swapper/100:30:251
564499154,6cyclictest15210-21munin-run19:30:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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