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2026-03-27 - 14:04

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 Fri Mar 27, 2026 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5263502222184,25sleep60-21swapper/619:06:486
5263872221167,17sleep20-21swapper/219:07:172
5263452217184,21sleep10-21swapper/119:06:431
5265172212174,24sleep40-21swapper/419:09:124
5262952211172,25sleep70-21swapper/719:06:007
5262642207174,21sleep30-21swapper/319:05:333
5265392204173,20sleep50-21swapper/519:09:295
5262612201173,18sleep00-21swapper/019:05:290
52681299310,18cyclictest0-21swapper/723:16:417
52681299310,18cyclictest0-21swapper/722:54:447
52681299310,18cyclictest0-21swapper/722:32:467
52681299310,18cyclictest0-21swapper/700:22:357
52681299310,18cyclictest0-21swapper/700:11:367
52678999290,28cyclictest0-21swapper/000:30:140
526790992623,2cyclictest363-21systemd-journal21:00:011
526804992523,1cyclictest0-21swapper/421:25:004
52679099250,1cyclictest0-21swapper/119:45:121
526789992520,4cyclictest0-21swapper/021:40:000
52681299240,23cyclictest0-21swapper/720:15:137
526810992423,1cyclictest0-21swapper/622:20:006
52680699241,23cyclictest550565-21basename19:50:015
52680699240,24cyclictest0-21swapper/520:10:115
52680699240,23cyclictest568213-21awk20:20:005
526804992421,2cyclictest363-21systemd-journal20:00:024
52680499240,23cyclictest624953-21idleruntime-cro22:19:594
52680099240,23cyclictest643027-21apt-get22:50:123
52679099240,23cyclictest628087-21awk22:24:591
52679099240,23cyclictest0-21swapper/123:35:001
52679099240,23cyclictest0-21swapper/120:20:001
52679099240,23cyclictest0-21swapper/119:30:111
52678999240,23cyclictest0-21swapper/000:35:120
52681299230,22cyclictest0-21swapper/720:50:117
52681099230,22cyclictest628746-21apt-get22:25:136
52681099230,0cyclictest0-21swapper/623:55:146
52680699230,1cyclictest0-21swapper/519:35:125
52680499230,2cyclictest591593-21idleruntime-cro21:00:004
526800992322,1cyclictest671617-21http23:40:133
526800992320,2cyclictest682597-21apt00:00:003
52680099230,22cyclictest0-21swapper/321:10:113
526795992321,1cyclictest0-21swapper/200:14:592
52679599230,22cyclictest618062-21munin-run21:50:002
52679599230,22cyclictest0-21swapper/222:20:002
526790992321,1cyclictest639759-21munin-run22:45:001
52679099230,22cyclictest623178-21munin-run22:10:011
52679099230,22cyclictest0-21swapper/119:25:011
526789992321,1cyclictest577719-21apt-get20:35:130
52678999230,22cyclictest0-21swapper/021:10:100
526812992220,1cyclictest637326-21apt-get22:40:127
526812992220,1cyclictest0-21swapper/700:30:027
52681299220,22cyclictest0-21swapper/719:45:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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