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2025-01-22 - 12:20

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 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 Wed Jan 22, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275991990,91ptp4l0-21swapper/119:06:491
94980810,76rtkit-daemon0-21swapper/1019:07:422
1894826755,10sleep50-21swapper/519:09:077
1876226756,8sleep00-21swapper/019:06:260
1880726654,10sleep110-21swapper/1119:07:003
1872726555,8sleep60-21swapper/619:05:568
1570826554,9sleep40-21swapper/419:05:066
158072640,0sleep00-21swapper/023:50:070
1881626350,10sleep70-21swapper/719:07:099
170092620,0sleep90-21swapper/921:15:1211
210772560,0sleep40-21swapper/419:50:226
19430992519,6cyclictest0-21swapper/1020:20:182
275991200,1ptp4l21-21ksoftirqd/123:35:171
276552180,0sleep110-21swapper/1120:40:233
1941599183,9cyclictest0-21swapper/723:15:009
1941599182,10cyclictest0-21swapper/720:25:009
1941199183,8cyclictest0-21swapper/600:25:018
1941199181,3cyclictest0-21swapper/600:30:138
1938899172,10cyclictest0-21swapper/120:39:591
63712160,0sleep100-21swapper/1021:50:162
263942160,0sleep40-21swapper/422:20:156
1941599163,7cyclictest0-21swapper/720:00:009
1941199162,9cyclictest0-21swapper/619:40:008
1941199162,8cyclictest0-21swapper/621:35:008
1939799163,8cyclictest0-21swapper/319:35:255
1939799163,8cyclictest0-21swapper/319:25:005
1939799161,2cyclictest0-21swapper/320:40:185
46012150,0sleep0121rcuc/019:30:160
275991150,7ptp4l21-21ksoftirqd/121:10:001
275991150,0ptp4l0-21swapper/123:30:141
275991150,0ptp4l0-21swapper/100:27:031
1939799153,7cyclictest0-21swapper/320:35:005
1939799152,8cyclictest0-21swapper/323:20:005
1939799152,8cyclictest0-21swapper/322:15:245
1939799152,7cyclictest0-21swapper/322:09:595
1938899152,7cyclictest0-21swapper/119:50:001
1938499152,9cyclictest0-21swapper/023:25:010
1938499152,7cyclictest0-21swapper/020:55:210
275991140,1ptp4l21-21ksoftirqd/123:00:141
275991140,1ptp4l21-21ksoftirqd/123:00:141
275991140,1ptp4l21-21ksoftirqd/119:15:161
1943399142,8cyclictest0-21swapper/1121:10:273
1943399142,7cyclictest0-21swapper/1119:20:003
1943399140,3cyclictest0-21swapper/1120:30:203
1942499142,7cyclictest0-21swapper/921:45:0011
1942499140,13cyclictest31109-21munin-run00:15:0011
1941199142,7cyclictest0-21swapper/619:40:258
1940299142,11cyclictest0-21swapper/423:05:006
1940299142,11cyclictest0-21swapper/423:05:006
1939799142,7cyclictest0-21swapper/319:45:235
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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