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2026-08-21 - 04:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #2

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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack8slot2s.osadl.org (updated Wed Aug 12, 2026 06:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
181873699711,37cyclictest1823667-21execl05:20:050
181873699701,38cyclictest1825562-21fstime05:27:280
181873699671,16cyclictest1823919-21execl05:21:070
181873699621,35cyclictest2086959-21sendmail-msp06:20:210
181873699621,35cyclictest2086959-21sendmail-msp06:20:210
1818739994820,24cyclictest0-21swapper/306:00:133
1818739994820,24cyclictest0-21swapper/306:00:133
1818739994820,24cyclictest0-21swapper/306:00:133
1818739994620,21cyclictest0-21swapper/306:20:083
1818739994620,21cyclictest0-21swapper/306:20:083
181873999461,38cyclictest1824248-21aten2.4-expect05:25:243
1818736994517,22cyclictest1938371-21sendmail-msp05:45:340
1818739994424,17cyclictest0-21swapper/305:15:573
1818739994421,19cyclictest1932155-21perl05:35:283
1818739994421,19cyclictest1932155-21perl05:35:283
1818739994325,16cyclictest0-21swapper/306:25:423
1818739994325,16cyclictest0-21swapper/306:25:423
1818739994323,17cyclictest0-21swapper/305:55:553
1818739994323,17cyclictest0-21swapper/305:55:553
181873699421,20cyclictest2074380-21Run06:12:370
181873699421,20cyclictest2074380-21Run06:12:370
181873699421,20cyclictest2074380-21Run06:12:370
181873999412,34cyclictest2071673-21multi.sh06:09:513
181873999412,34cyclictest2071673-21multi.sh06:09:513
1818739994118,19cyclictest1821291-21ntpq05:10:453
181873699411,19cyclictest1820274-21sshd-auth05:08:380
1818739994016,22cyclictest1949028-21kworker/u16:16-rpciod06:11:453
1818739994016,22cyclictest1949028-21kworker/u16:16-rpciod06:11:453
1818739994016,22cyclictest1949028-21kworker/u16:16-rpciod06:11:453
1818739994014,22cyclictest1938371-21sendmail-msp05:46:303
181873999401,18cyclictest1823919-21execl05:20:573
1818736994013,10cyclictest1940858-21kworker/u16:8+rpciod06:15:390
1818739993925,9cyclictest0-21swapper/305:05:363
1818739993925,10cyclictest0-21swapper/306:30:313
181873699391,34cyclictest2091103-21ntpq06:30:450
181873699391,32cyclictest1948071-21memory06:01:110
181873699391,32cyclictest1948071-21memory06:01:110
181873699391,32cyclictest1948071-21memory06:01:110
181873699391,18cyclictest1936831-21expr05:38:350
181873699391,18cyclictest1936831-21expr05:38:350
181873699391,17cyclictest2088861-21head06:25:270
181873699391,17cyclictest2088861-21head06:25:270
181873999386,29cyclictest1855193-21spawn05:33:303
181873699381,15cyclictest2092041-21cron06:40:000
181873999371,13cyclictest1945317-21execl05:51:333
181873699371,31cyclictest1947202-21cat06:00:030
181873699371,31cyclictest1947202-21cat06:00:030
181873699371,31cyclictest1938371-21sendmail-msp05:44:170
181873699371,31cyclictest1938371-21sendmail-msp05:44:170
181873699371,14cyclictest2070825-21switchtime06:09:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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