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2026-04-21 - 03:54

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 Tue Apr 21, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16221832236173,21sleep10-21swapper/119:07:041
16221302219186,21sleep20-21swapper/219:06:162
16223362218164,18sleep30-21swapper/319:09:153
16221062218171,15sleep70-21swapper/719:05:577
16221052214160,17sleep60-21swapper/619:05:566
16222102211184,17sleep50-21swapper/519:07:245
16223062209182,17sleep00-21swapper/019:08:470
16220762207177,19sleep40-21swapper/419:05:304
1622619992725,1cyclictest0-21swapper/523:45:005
162262399260,25cyclictest1776347-21apt-get23:35:116
162260399250,24cyclictest0-21swapper/023:35:110
162261399240,3cyclictest1703477-21grep21:30:004
162261399240,23cyclictest0-21swapper/421:00:124
1622625992322,0cyclictest0-21swapper/723:00:117
1622625992321,1cyclictest0-21swapper/723:25:137
1622625992321,1cyclictest0-21swapper/719:15:117
162261999230,22cyclictest1813666-21munin-run00:40:005
1622613992321,1cyclictest1813679-21awk00:40:004
162261399230,22cyclictest1727267-21apt-get22:10:124
162261399230,22cyclictest1672471-21apt-get20:35:134
162261399230,22cyclictest0-21swapper/400:15:114
162260999230,22cyclictest0-21swapper/300:00:013
162260899230,22cyclictest0-21swapper/219:20:122
162260899230,1cyclictest0-21swapper/223:20:002
1622605992321,2cyclictest1715184-21awk21:50:001
162260599230,22cyclictest1782588-21apt-get23:45:111
162260599230,22cyclictest0-21swapper/123:10:121
162260599230,22cyclictest0-21swapper/122:40:131
162260599230,22cyclictest0-21swapper/119:40:121
162260599230,0cyclictest0-21swapper/121:50:011
1622603992323,0cyclictest0-21swapper/021:30:130
162260399230,22cyclictest0-21swapper/022:25:130
1622625992221,1cyclictest0-21swapper/719:25:137
1622625992220,1cyclictest0-21swapper/720:55:127
162262599220,22cyclictest0-21swapper/722:00:007
162262599220,21cyclictest1775933-21perf23:35:007
162262599220,21cyclictest1715157-21apt-get21:50:017
162262599220,21cyclictest1678195-21apt-get20:45:127
162262599220,21cyclictest1646768-21apt-get19:50:147
162262599220,21cyclictest0-21swapper/721:20:127
162262599220,21cyclictest0-21swapper/720:40:117
162262599220,21cyclictest0-21swapper/719:35:127
162262599220,21cyclictest0-21swapper/700:10:127
162262599220,1cyclictest1790762-21munin-run00:00:017
162262599220,1cyclictest0-21swapper/720:20:137
1622623992221,1cyclictest0-21swapper/623:20:126
1622623992220,1cyclictest0-21swapper/620:10:006
162262399220,21cyclictest0-21swapper/622:35:006
162262399220,21cyclictest0-21swapper/620:40:006
162262399220,1cyclictest1709481-21sendmail-msp21:40:006
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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