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2026-03-26 - 04:41

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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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 100 highest latencies:
System rack3slot3s.osadl.org (updated Thu Mar 26, 2026 00:43:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
288647213178,49sleep30-21swapper/33
28875528455,20sleep20-21swapper/22
28871328354,12sleep10-21swapper/11
28851328357,15sleep00-21swapper/00
6937072300,2sleep00-21swapper/00
289139992622,2cyclictest0-21swapper/33
70023522312,8sleep1419919-21diskmemload1
28913999222,16cyclictest0-21swapper/33
289139992212,7cyclictest419920-21turbostat3
7878692211,3sleep00-21swapper/00
7184752211,4sleep11-21systemd1
5601282211,9sleep1419919-21diskmemload1
289139992111,7cyclictest451843-21taskset3
28913999211,17cyclictest0-21swapper/33
28913999211,16cyclictest487971-21taskset3
28913999211,16cyclictest0-21swapper/33
28913999211,16cyclictest0-21swapper/33
28913999211,16cyclictest0-21swapper/33
28913999201,3cyclictest0-21swapper/33
289139992012,5cyclictest0-21swapper/33
28913999201,15cyclictest611709-21taskset3
28913999201,15cyclictest0-21swapper/33
28913999201,12cyclictest0-21swapper/33
6726962191,15sleep1672709-21ssh1
6389612191,4sleep2638974-21ssh2
3832392190,11sleep0384728-21kthreadcore0
28913999195,12cyclictest0-21swapper/33
28913999192,14cyclictest0-21swapper/33
289139991914,3cyclictest0-21swapper/33
289139991911,5cyclictest0-21swapper/33
28913999191,15cyclictest0-21swapper/33
28913999191,15cyclictest0-21swapper/33
28913999191,14cyclictest0-21swapper/33
28913999191,14cyclictest0-21swapper/33
28913999191,14cyclictest0-21swapper/33
28913999191,14cyclictest0-21swapper/33
28913999191,14cyclictest0-21swapper/33
28913999190,15cyclictest0-21swapper/33
7247062181,2sleep00-21swapper/00
4812332181,2sleep10-21swapper/11
4563922181,13sleep1457753-21kthreadcore1
3615392181,4sleep2363218-21cut2
28913999183,12cyclictest0-21swapper/33
289139991815,1cyclictest0-21swapper/33
289139991815,1cyclictest0-21swapper/33
28913999181,14cyclictest635793-21chrt3
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,14cyclictest0-21swapper/33
28913999181,13cyclictest0-21swapper/33
28913999181,13cyclictest0-21swapper/33
7775962171,3sleep00-21swapper/00
5955432171,11sleep0595606-21ssh0
5826042171,9sleep0582656-21ntpq0
28913999171,4cyclictest0-21swapper/33
28913999171,13cyclictest0-21swapper/33
28913999171,13cyclictest0-21swapper/33
28913999171,13cyclictest0-21swapper/33
28913999171,13cyclictest0-21swapper/33
28913999171,13cyclictest0-21swapper/33
28913999171,12cyclictest0-21swapper/33
28913999170,14cyclictest0-21swapper/33
28913999170,14cyclictest0-21swapper/33
28913999170,14cyclictest0-21swapper/33
7508632161,4sleep1419919-21diskmemload1
7508632161,4sleep1419919-21diskmemload1
6829162161,4sleep1419919-21diskmemload1
4963612161,4sleep1419919-21diskmemload1
4358142161,2sleep10-21swapper/11
28913999161,13cyclictest0-21swapper/33
28913999160,14cyclictest0-21swapper/33
28913999160,13cyclictest0-21swapper/33
28913999160,13cyclictest0-21swapper/33
28913999160,13cyclictest0-21swapper/33
28913999160,13cyclictest0-21swapper/33
7798412151,8sleep1419919-21diskmemload1
6906732151,9sleep1419919-21diskmemload1
6895272151,8sleep20-21swapper/22
5738882151,9sleep0573953-21ntpq0
4964752151,2sleep20-21swapper/22
289139991512,2cyclictest0-21swapper/33
289139991512,1cyclictest0-21swapper/33
28913999151,10cyclictest771696-21chrt3
28913999150,13cyclictest0-21swapper/33
28913999150,13cyclictest0-21swapper/33
28913999150,12cyclictest0-21swapper/33
7802852141,3sleep1780296-21ssh1
7510752140,2sleep20-21swapper/22
7510752140,2sleep20-21swapper/22
7443722141,1sleep20-21swapper/22
7370452141,4sleep1737216-21/usr/sbin/munin1
5852122141,4sleep1419919-21diskmemload1
5769892141,2sleep20-21swapper/22
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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