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2025-11-17 - 04:10

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, 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 rack8slot4s.osadl.org (updated Mon Nov 17, 2025 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18582272242174,21sleep60-21swapper/619:06:596
18581422237175,20sleep00-21swapper/019:05:490
18581622230167,22sleep20-21swapper/219:06:072
18580752214181,21sleep40-21swapper/419:05:294
18581542213186,17sleep30-21swapper/319:06:003
18581362211176,23sleep50-21swapper/519:05:465
18584352210176,21sleep70-21swapper/719:09:587
18559932208174,22sleep10-21swapper/119:05:101
20142992580,1sleep40-21swapper/423:35:224
185868399340,16cyclictest0-21swapper/722:14:567
185868399340,16cyclictest0-21swapper/721:09:027
185868399310,17cyclictest0-21swapper/723:53:477
185868399300,17cyclictest0-21swapper/723:42:487
185868399300,17cyclictest0-21swapper/700:04:467
185868399290,16cyclictest0-21swapper/723:09:517
185868399290,16cyclictest0-21swapper/722:58:527
185868399290,16cyclictest0-21swapper/700:15:457
185866299270,1cyclictest1919551-21apt20:55:000
185868399250,24cyclictest2038847-21apt-get00:20:177
185868099250,3cyclictest1991782-21sh23:00:016
185867299250,24cyclictest0-21swapper/321:45:143
185867299250,21cyclictest2021347-21apt-get23:50:123
185866299250,3cyclictest1913844-21idleruntime-cro20:45:000
1858678992423,1cyclictest1948682-21perf21:45:005
185867499240,0cyclictest0-21swapper/421:40:144
185867299240,23cyclictest1896420-21turbostat.cron20:15:003
185867299240,23cyclictest0-21swapper/323:15:023
185867299240,23cyclictest0-21swapper/319:40:163
185866899240,23cyclictest0-21swapper/221:35:162
185866599240,2cyclictest1972226-21chrt22:25:121
185866599240,1cyclictest0-21swapper/120:00:151
185866299240,23cyclictest0-21swapper/023:50:000
185866299240,0cyclictest0-21swapper/019:25:120
185868399230,1cyclictest1983228-21dump-pmu-power22:45:007
1858680992321,1cyclictest1873566-21munin-run19:35:006
185868099230,22cyclictest650-21dbus-daemon23:20:016
185868099230,22cyclictest1992237-21apt-get23:00:136
185868099230,22cyclictest1899298-21awk20:20:006
185868099230,22cyclictest1890737-21awk20:05:006
185868099230,22cyclictest1861416-21sleep19:15:006
185868099230,22cyclictest0-21swapper/621:55:176
185868099230,1cyclictest1905279-21perf20:30:006
1858678992321,2cyclictest1910973-21idleruntime-cro20:40:005
185867899230,1cyclictest0-21swapper/500:00:005
1858672992321,1cyclictest2027098-21apt-get00:00:133
1858672992321,1cyclictest1911426-21apt-get20:40:143
185867299230,22cyclictest0-21swapper/322:35:143
185867299230,22cyclictest0-21swapper/321:50:133
1858668992320,2cyclictest1913856-21munin-run20:45:002
185866899230,22cyclictest0-21swapper/222:05:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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