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2026-03-30 - 17:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #3

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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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 100 highest latencies:
System rack3slot3s.osadl.org (updated Mon Mar 30, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
397251212353,64sleep30-21swapper/33
40163028568,11sleep20-21swapper/22
40172328362,12sleep10-21swapper/11
40186027855,6sleep00-21swapper/00
7255722251,13sleep2725586-21sh2
40203599250,16cyclictest0-21swapper/33
40203599231,20cyclictest0-21swapper/33
40203599231,18cyclictest0-21swapper/33
40203599221,3cyclictest0-21swapper/33
40203599220,5cyclictest0-21swapper/33
40203599220,1cyclictest0-21swapper/33
40203599212,14cyclictest612432-21chrt3
40203599212,14cyclictest612432-21chrt3
402035992116,3cyclictest0-21swapper/33
402035992115,3cyclictest0-21swapper/33
40203599211,16cyclictest0-21swapper/33
40203599211,16cyclictest0-21swapper/33
40203599211,13cyclictest0-21swapper/33
402035992110,8cyclictest0-21swapper/33
40203599210,1cyclictest0-21swapper/33
40203599210,1cyclictest0-21swapper/33
40203599210,15cyclictest0-21swapper/33
40203599210,13cyclictest0-21swapper/33
8070462201,3sleep10-21swapper/11
40203599201,16cyclictest0-21swapper/33
40203599201,16cyclictest0-21swapper/33
40203599201,16cyclictest0-21swapper/33
40203599201,16cyclictest0-21swapper/33
40203599201,16cyclictest0-21swapper/33
40203599201,15cyclictest522268-21turbostat3
40203599201,15cyclictest0-21swapper/33
40203599201,15cyclictest0-21swapper/33
40203599201,15cyclictest0-21swapper/33
40203599201,15cyclictest0-21swapper/33
40203599201,15cyclictest0-21swapper/33
40203599200,17cyclictest743941-21chrt3
8278602191,4sleep0827874-21ssh0
8023442191,4sleep1532953-21diskmemload1
5574522191,3sleep20-21swapper/22
40203599191,16cyclictest0-21swapper/33
402035991911,5cyclictest479649-21turbostat3
40203599191,15cyclictest0-21swapper/33
40203599191,15cyclictest0-21swapper/33
40203599191,15cyclictest0-21swapper/33
40203599191,15cyclictest0-21swapper/33
40203599191,15cyclictest0-21swapper/33
40203599191,15cyclictest0-21swapper/33
40203599191,15cyclictest0-21swapper/33
40203599191,15cyclictest0-21swapper/33
40203599191,14cyclictest653533-21taskset3
40203599191,14cyclictest532952-21turbostat3
40203599191,14cyclictest527599-21turbostat3
40203599191,14cyclictest506288-21turbostat3
40203599191,14cyclictest447052-21turbostat3
40203599191,14cyclictest0-21swapper/33
40203599191,14cyclictest0-21swapper/33
40203599191,14cyclictest0-21swapper/33
40203599191,12cyclictest441369-21chrt3
40203599190,2cyclictest0-21swapper/33
40203599190,16cyclictest0-21swapper/33
8841042181,4sleep1532953-21diskmemload1
8731392181,3sleep20-21swapper/22
7436852181,3sleep20-21swapper/22
6603542181,5sleep2660413-21ntpq2
6288482181,2sleep20-21swapper/22
50624321810,4sleep00-21swapper/00
4529942181,5sleep0453210-21diskstats0
40203599181,5cyclictest0-21swapper/33
40203599181,14cyclictest0-21swapper/33
40203599181,14cyclictest0-21swapper/33
40203599181,13cyclictest0-21swapper/33
40203599181,11cyclictest66950irq/132-enp1s0-TxRx-33
8926522171,4sleep1532953-21diskmemload1
8096502171,3sleep2809739-21proc_pri2
7335622171,3sleep10-21swapper/11
6903302171,4sleep2690341-21ssh2
6439042170,3sleep10-21swapper/11
402035991711,4cyclictest0-21swapper/33
40203599170,9cyclictest0-21swapper/33
40203599170,14cyclictest0-21swapper/33
8896292161,3sleep20-21swapper/22
8630832160,1sleep20-21swapper/22
5747412160,1sleep10-21swapper/11
40203599161,4cyclictest0-21swapper/33
40203599161,12cyclictest469009-21turbostat3
40203599160,13cyclictest0-21swapper/33
8473802151,1sleep00-21swapper/00
8470752151,9sleep1532953-21diskmemload1
8296462150,1sleep20-21swapper/22
8215182151,2sleep20-21swapper/22
8207802151,10sleep0820793-21ssh0
7172692151,10sleep0717283-21ssh0
6825362151,3sleep1532953-21diskmemload1
6450822150,1sleep20-21swapper/22
5486662151,3sleep1532953-21diskmemload1
4745662151,2sleep10-21swapper/11
40203599150,8cyclictest0-21swapper/33
40203599150,8cyclictest0-21swapper/33
40203599150,7cyclictest0-21swapper/33
40203599150,6cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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