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2025-12-28 - 18:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 rack8slot4s.osadl.org (updated Sun Dec 28, 2025 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15004522232177,44sleep40-21swapper/407:07:304
15004982225191,22sleep30-21swapper/307:08:103
15004532221162,19sleep50-21swapper/507:07:315
15003622214177,24sleep60-21swapper/607:06:126
15004972210177,21sleep20-21swapper/207:08:082
15004952206173,21sleep00-21swapper/007:08:060
15004282204173,18sleep70-21swapper/707:07:097
15003392200172,18sleep10-21swapper/107:05:491
150086799260,25cyclictest0-21swapper/610:45:136
150086799250,1cyclictest1525039-21apt-get07:50:126
150086199250,22cyclictest1556738-21apt-get08:45:124
150086199250,0cyclictest0-21swapper/410:45:124
150087099247,0cyclictest0-21swapper/710:54:347
150086599240,23cyclictest0-21swapper/510:35:005
1500861992421,2cyclictest1680467-21apt-get12:20:134
150086199240,23cyclictest0-21swapper/407:20:324
150085899240,23cyclictest0-21swapper/308:30:003
150087099231,4cyclictest0-21swapper/710:21:377
150087099230,23cyclictest1608283-21perf10:15:007
150087099230,22cyclictest1674736-21apt-get12:10:137
150087099230,22cyclictest1620132-21apt-get10:35:147
150087099230,22cyclictest1530363-21sendmail-msp08:00:007
150087099230,22cyclictest1515762-21awk07:35:007
1500867992321,1cyclictest1579857-21apt-get09:25:126
1500867992320,2cyclictest1645692-21dump-pmu-power11:20:006
1500867992318,4cyclictest1602313-21munin-run10:05:016
150086799230,2cyclictest1596601-21basename09:55:016
150086799230,22cyclictest1691464-21systemctl12:40:006
150086799230,22cyclictest1611135-21munin-run10:20:006
150086799230,22cyclictest0-21swapper/611:10:136
150086799230,22cyclictest0-21swapper/610:20:136
150086799230,22cyclictest0-21swapper/608:55:116
150086799230,0cyclictest0-21swapper/608:15:136
1500865992321,1cyclictest0-21swapper/511:25:005
150086599230,22cyclictest1553451-21munin-run08:40:005
150086599230,22cyclictest1553451-21munin-run08:40:005
150086599230,22cyclictest1510466-21apt-get07:25:125
150086599230,1cyclictest1665411-21apt-get11:51:035
150086599230,1cyclictest1519331-21apt-get07:40:125
1500861992320,2cyclictest1663257-21apt-get11:50:114
1500861992318,4cyclictest0-21swapper/412:05:004
150086199230,23cyclictest1571278-21apt-get09:10:124
150086199230,23cyclictest0-21swapper/407:10:124
150086199230,22cyclictest0-21swapper/410:05:024
150086199230,22cyclictest0-21swapper/407:40:124
150086199230,21cyclictest1522189-21apt-get07:45:134
1500858992322,1cyclictest0-21swapper/308:50:013
1500858992321,1cyclictest1614420-21apt-get10:25:093
150085899230,22cyclictest0-21swapper/310:00:153
150085899230,22cyclictest0-21swapper/307:50:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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