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2026-07-21 - 02:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #8

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 rack0slot8s.osadl.org (updated Tue Jul 21, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
283491990,89ptp4l0-21swapper/119:05:231
94080800,75rtkit-daemon0-21swapper/1119:09:593
469527759,9sleep100-21swapper/1019:07:592
447027060,8sleep50-21swapper/519:05:317
447126950,10sleep60-21swapper/619:05:318
470226755,10sleep40-21swapper/419:08:066
472626655,9sleep00-21swapper/019:08:250
451926553,10sleep70-21swapper/719:06:089
247522490,0sleep90-21swapper/921:40:1411
527999250,1cyclictest0-21swapper/1020:25:222
524799201,14cyclictest0-21swapper/420:20:006
5279991918,1cyclictest0-21swapper/1023:20:222
526999180,1cyclictest0-21swapper/823:49:5510
523799182,10cyclictest0-21swapper/221:50:004
526499173,8cyclictest0-21swapper/720:50:009
524299173,9cyclictest0-21swapper/319:35:015
522699173,9cyclictest0-21swapper/022:45:010
522699173,8cyclictest0-21swapper/022:20:250
522699173,8cyclictest0-21swapper/022:20:240
283491170,0ptp4l0-21swapper/119:55:181
528399162,8cyclictest0-21swapper/1122:05:013
527399161,3cyclictest0-21swapper/923:15:1711
526999164,7cyclictest0-21swapper/819:40:0010
526999163,8cyclictest0-21swapper/823:10:0110
526499164,7cyclictest0-21swapper/723:45:009
525199162,8cyclictest0-21swapper/523:45:017
524299162,8cyclictest0-21swapper/322:30:015
524299162,8cyclictest0-21swapper/322:30:005
524299162,8cyclictest0-21swapper/320:50:265
523799160,11cyclictest0-21swapper/222:05:014
523199163,8cyclictest0-21swapper/120:45:001
523199162,8cyclictest0-21swapper/122:55:001
523199161,9cyclictest15200-21kworker/u24:123:40:001
522699162,8cyclictest0-21swapper/023:50:010
522699162,8cyclictest0-21swapper/021:25:010
47602167,7sleep80-21swapper/819:08:5810
283491160,0ptp4l0-21swapper/120:15:171
527399154,7cyclictest0-21swapper/920:45:0011
527399152,8cyclictest0-21swapper/920:25:0011
526499153,7cyclictest0-21swapper/719:25:019
526499152,8cyclictest0-21swapper/723:35:019
526499152,8cyclictest0-21swapper/721:35:009
526499152,8cyclictest0-21swapper/719:15:259
526499152,8cyclictest0-21swapper/700:10:009
525199153,7cyclictest0-21swapper/523:15:017
525199153,7cyclictest0-21swapper/521:35:017
5242991512,3cyclictest0-21swapper/322:35:165
523799153,8cyclictest0-21swapper/222:45:004
523799152,8cyclictest0-21swapper/220:00:004
523199153,6cyclictest0-21swapper/122:10:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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