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2026-08-25 - 06:06

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 Aug 25, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
94080950,90rtkit-daemon0-21swapper/019:06:400
283491830,61ptp4l0-21swapper/119:05:101
2136627261,9sleep50-21swapper/519:07:377
2133026958,9sleep100-21swapper/1019:07:062
2143926856,10sleep110-21swapper/1119:08:443
2128426857,9sleep60-21swapper/619:06:268
2123926858,8sleep40-21swapper/419:05:496
2138126755,10sleep70-21swapper/719:07:519
236832580,0sleep80-21swapper/820:35:0110
84772490,0sleep100-21swapper/1020:55:172
61112460,0sleep70-21swapper/720:50:259
2194399250,1cyclictest0-21swapper/1020:45:162
2191699232,16cyclictest0-21swapper/420:15:006
2191699222,15cyclictest0-21swapper/419:45:006
2190599225,11cyclictest0-21swapper/221:50:014
2192599193,9cyclictest0-21swapper/620:20:018
2190599193,10cyclictest0-21swapper/221:25:014
2193999170,16cyclictest0-21swapper/900:20:1111
2193099173,8cyclictest0-21swapper/719:25:019
2192599173,9cyclictest0-21swapper/622:00:008
2192599172,9cyclictest0-21swapper/622:40:018
2192199173,8cyclictest0-21swapper/522:40:017
2190599173,9cyclictest0-21swapper/223:30:254
2190599173,9cyclictest0-21swapper/219:50:004
21900991714,3cyclictest0-21swapper/123:48:461
21900991714,3cyclictest0-21swapper/100:31:581
2189699173,8cyclictest0-21swapper/020:00:000
2189699173,7cyclictest0-21swapper/022:50:000
2189699172,9cyclictest0-21swapper/020:55:000
283491160,0ptp4l0-21swapper/122:15:231
283491160,0ptp4l0-21swapper/121:30:241
283491160,0ptp4l0-21swapper/121:30:241
283491160,0ptp4l0-21swapper/119:10:241
2193499162,8cyclictest0-21swapper/800:05:0110
2192599162,8cyclictest0-21swapper/620:30:008
2192199163,8cyclictest0-21swapper/519:30:017
2192199163,7cyclictest0-21swapper/520:40:007
2192199161,9cyclictest0-21swapper/521:40:017
2192199161,9cyclictest0-21swapper/521:40:007
2192199161,3cyclictest0-21swapper/519:55:197
2191299162,8cyclictest0-21swapper/321:05:005
2190599163,9cyclictest0-21swapper/200:00:014
2190599163,8cyclictest0-21swapper/223:15:014
21900991614,2cyclictest0-21swapper/123:41:071
21900991614,2cyclictest0-21swapper/123:29:121
21900991614,2cyclictest0-21swapper/123:22:561
21900991614,2cyclictest0-21swapper/100:26:231
214362167,7sleep80-21swapper/819:08:4010
283491150,3ptp4l21-21ksoftirqd/100:14:551
267202150,0sleep70-21swapper/723:25:179
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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