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2025-07-12 - 11:04

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 Sat Jul 12, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
949801050,90rtkit-daemon0-21swapper/1019:08:242
275991900,80ptp4l0-21swapper/119:09:581
1885827058,9sleep110-21swapper/1119:05:233
1957026654,10sleep50-21swapper/519:06:057
1955226454,8sleep00-21swapper/019:05:480
1955626353,8sleep40-21swapper/419:05:526
1967526153,6sleep70-21swapper/719:07:319
1961226052,6sleep60-21swapper/619:06:428
10682590,0sleep30-21swapper/320:05:205
10682590,0sleep30-21swapper/320:05:205
302442570,0sleep80-21swapper/823:30:2410
19012540,0sleep50-21swapper/522:15:017
2025899360,1cyclictest0-21swapper/1020:00:242
2023199211,7cyclictest0-21swapper/420:40:016
2022699204,9cyclictest0-21swapper/321:00:015
2023599181,3cyclictest0-21swapper/519:40:217
275991170,1ptp4l21-21ksoftirqd/120:10:011
275991170,1ptp4l21-21ksoftirqd/120:10:011
2025399173,8cyclictest0-21swapper/921:20:0111
2022699175,8cyclictest17241-21kworker/u24:100:10:005
2022699173,8cyclictest0-21swapper/300:20:005
275991160,1ptp4l21-21ksoftirqd/120:15:181
275991160,1ptp4l21-21ksoftirqd/120:15:181
275991160,1ptp4l21-21ksoftirqd/119:15:231
275991160,0ptp4l0-21swapper/120:25:181
275991160,0ptp4l0-21swapper/120:25:181
2026299162,8cyclictest0-21swapper/1121:30:013
2025399163,8cyclictest0-21swapper/923:45:0011
2025399162,9cyclictest0-21swapper/921:25:0111
2022699164,7cyclictest0-21swapper/319:30:005
20226991612,3cyclictest0-21swapper/322:00:205
20214991614,1cyclictest17032-21turbostat22:39:551
196482167,7sleep80-21swapper/819:07:0810
275991150,0ptp4l0-21swapper/123:40:131
275991150,0ptp4l0-21swapper/122:20:201
275991150,0ptp4l0-21swapper/121:50:161
275991150,0ptp4l0-21swapper/120:50:151
275991150,0ptp4l0-21swapper/119:25:231
2025399153,7cyclictest0-21swapper/923:25:2311
2025399153,7cyclictest0-21swapper/922:50:0111
2023199153,7cyclictest0-21swapper/423:40:236
2022699153,7cyclictest0-21swapper/320:35:015
2022699152,7cyclictest0-21swapper/322:15:015
154782150,0sleep90-21swapper/922:30:1811
89092140,0sleep110-21swapper/1123:05:123
275991140,1ptp4l21-21ksoftirqd/119:10:181
275991140,0ptp4l0-21swapper/120:00:251
2026299143,7cyclictest0-21swapper/1121:45:243
2026299142,7cyclictest0-21swapper/1123:40:003
2025399143,7cyclictest0-21swapper/920:10:0011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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