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2026-01-12 - 08:29

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 Jan 12, 2026 00:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10561642411393,12sleep40-21swapper/419:07:1110
10562312368330,13sleep100-21swapper/1019:08:062
10562132368348,13sleep150-21swapper/1519:07:557
10529042367359,5sleep60-21swapper/619:05:0512
10560872363323,13sleep30-21swapper/319:06:069
10562732356336,13sleep00-21swapper/019:08:430
10562122355335,13sleep140-21swapper/1419:07:536
10562242354333,5sleep90-21swapper/919:08:0515
10560912354334,13sleep70-21swapper/719:06:1013
10560502354336,11sleep80-21swapper/819:05:3914
10562162351331,13sleep10-21swapper/119:07:571
10563432350331,12sleep110-21swapper/1119:09:433
10561842350330,13sleep50-21swapper/519:07:2811
10560802350332,12sleep20-21swapper/219:06:058
10561922349328,13sleep130-21swapper/1319:07:365
10561912349331,12sleep120-21swapper/1219:07:354
1056821995349,4cyclictest0-21swapper/721:38:3613
1056821995349,4cyclictest0-21swapper/721:22:1213
1056821994844,4cyclictest0-21swapper/721:51:2413
1056821994844,0cyclictest0-21swapper/722:45:0813
1056821994746,0cyclictest0-21swapper/721:45:0013
1056821994642,4cyclictest0-21swapper/723:51:3413
1056821994637,5cyclictest1105981-21kworker/u32:1+events_unbound20:14:0813
1056821994545,0cyclictest0-21swapper/719:10:2813
1056821994440,0cyclictest0-21swapper/722:16:5813
1056821994437,1cyclictest211rcu_preempt21:30:4413
105682199434,38cyclictest0-21swapper/722:01:0813
105682199434,38cyclictest0-21swapper/722:01:0813
1056821994332,11cyclictest0-21swapper/722:24:4413
105682199424,38cyclictest0-21swapper/723:10:3813
1056821994240,0cyclictest0-21swapper/700:00:4413
105682199420,41cyclictest0-21swapper/700:31:5613
1056821994141,0cyclictest0-21swapper/723:25:4213
1056821994141,0cyclictest0-21swapper/722:37:2813
1056821994141,0cyclictest0-21swapper/722:11:4813
1056821994141,0cyclictest0-21swapper/722:11:4813
1056821994141,0cyclictest0-21swapper/719:20:1813
1056821994140,1cyclictest861rcuc/723:20:5413
1056821994140,1cyclictest1353027-21expr23:40:1213
1056821994138,1cyclictest1926-21arpwatch20:15:2413
105680399414,25cyclictest0-21swapper/120:37:021
1056821994040,0cyclictest0-21swapper/723:46:2413
1056821994040,0cyclictest0-21swapper/723:39:2813
1056821994040,0cyclictest0-21swapper/723:15:2613
1056821994040,0cyclictest0-21swapper/700:10:0613
105682199401,39cyclictest1194074-21kworker/7:0-events22:56:4813
105682199400,39cyclictest1206681-21kworker/u32:2+flush-0:7822:28:2413
105682199400,39cyclictest0-21swapper/721:27:5313
105682199400,39cyclictest0-21swapper/721:15:1013
105682199400,1cyclictest1299366-21kworker/7:1-events23:07:0013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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