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2026-05-15 - 10:31

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 100 highest latencies:
System rack8slot4s.osadl.org (updated Fri May 15, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1017672241167,22sleep40-21swapper/419:06:074
1019582226167,19sleep60-21swapper/619:08:506
1019322222184,25sleep00-21swapper/019:08:290
1018982221183,25sleep20-21swapper/219:07:592
1019682220186,22sleep70-21swapper/719:09:007
1018152220182,26sleep50-21swapper/519:06:495
1019822219182,23sleep30-21swapper/319:09:123
1018322218188,20sleep10-21swapper/119:07:011
15279621440,0sleep5152795-21apt-config20:31:235
102255993126,4cyclictest191465-21cat21:40:005
10225599310,18cyclictest0-21swapper/522:41:455
10225899280,22cyclictest0-21swapper/620:20:016
10225899270,0cyclictest0-21swapper/619:55:126
102258992621,1cyclictest165349-21apt-get20:55:126
10225899260,21cyclictest0-21swapper/623:45:006
10224999260,25cyclictest106275-21apt-get19:15:123
10224999260,25cyclictest106275-21apt-get19:15:123
10225999250,24cyclictest220941-21apt22:29:597
10225999250,24cyclictest0-21swapper/719:30:117
102258992521,1cyclictest138701-21apt-get20:10:116
10225899250,24cyclictest0-21swapper/600:30:026
102253992523,1cyclictest2538442sleep423:25:124
102253992520,4cyclictest247547-21munin-run23:15:004
102249992522,3cyclictest105286-21latency_hist19:15:013
10224999250,24cyclictest0-21swapper/300:20:123
10224799250,24cyclictest111765-21awk19:25:002
10224799250,24cyclictest111765-21awk19:25:002
10224499250,24cyclictest253466-21taskset23:25:001
10224499250,24cyclictest253466-21taskset23:25:001
10224499250,24cyclictest0-21swapper/123:50:131
10225899240,1cyclictest218428-21apt-get22:25:106
10225899240,1cyclictest159469-21apt-get20:45:126
10225399240,24cyclictest176707-21cron21:15:004
10225399240,23cyclictest241675-21awk23:05:004
102249992423,1cyclictest789-21dbus-daemon20:40:013
10224999240,24cyclictest220965-21awk22:30:003
102247992423,1cyclictest262760-21apt-get23:40:122
10224799240,1cyclictest0-21swapper/223:00:202
10224799240,1cyclictest0-21swapper/200:10:132
102244992423,1cyclictest229827-21922:45:001
10224499240,23cyclictest0-21swapper/122:30:171
102259992322,1cyclictest227277-21apt-get22:40:127
10225999230,22cyclictest224318-21apt-get22:35:137
10225999230,22cyclictest153092-21sh20:35:017
10225999230,22cyclictest0-21swapper/723:50:137
10225999230,22cyclictest0-21swapper/721:30:127
10225899230,22cyclictest280439-21apt-get00:10:126
10225899230,22cyclictest0-21swapper/622:55:036
10225599236,4cyclictest0-21swapper/520:18:585
10225599230,22cyclictest262273-21apt-get23:40:025
10225599230,22cyclictest0-21swapper/523:25:135
102253992321,1cyclictest0-21swapper/421:50:134
102253992319,3cyclictest291942-21date00:30:014
10225399230,22cyclictest126910-21apt-get19:50:124
102249992322,1cyclictest0-21swapper/300:40:013
10224999230,23cyclictest243387-21ntpq23:05:183
10224999230,23cyclictest0-21swapper/320:10:183
10224999230,22cyclictest203693-21apt-get22:00:123
10224999230,22cyclictest191906-21apt-get21:40:113
10224999230,22cyclictest0-21swapper/319:30:123
102247992323,0cyclictest0-21swapper/200:35:142
102247992322,1cyclictest171260-21apt-get21:05:112
10224799230,22cyclictest0-21swapper/220:15:122
10224799230,0cyclictest0-21swapper/222:05:122
102244992323,0cyclictest0-21swapper/120:40:191
102244992322,1cyclictest247545-21grep23:15:001
102244992322,1cyclictest0-21swapper/121:35:001
102244992321,1cyclictest120570-21cron19:40:001
10224499230,23cyclictest168321-21apt-get21:00:131
10224499230,22cyclictest0-21swapper/123:40:031
10224499230,22cyclictest0-21swapper/123:35:131
10224499230,22cyclictest0-21swapper/120:20:161
10224499230,22cyclictest0-21swapper/119:55:171
10224499230,22cyclictest0-21swapper/119:45:121
10224499230,22cyclictest0-21swapper/100:00:101
10224299230,23cyclictest0-21swapper/020:05:190
10224299230,22cyclictest285915-21sleep00:20:000
10224299230,22cyclictest181426-21awk21:20:180
10224299230,22cyclictest0-21swapper/022:15:120
10224299230,22cyclictest0-21swapper/021:55:110
10224299230,22cyclictest0-21swapper/020:55:190
10224299230,22cyclictest0-21swapper/020:20:030
102259992222,0cyclictest0-21swapper/700:10:127
102259992221,1cyclictest0-21swapper/719:15:127
102259992221,1cyclictest0-21swapper/719:15:127
102259992221,1cyclictest0-21swapper/700:05:157
10225999220,22cyclictest0-21swapper/723:20:007
10225999220,22cyclictest0-21swapper/721:00:017
10225999220,21cyclictest0-21swapper/722:20:117
10225999220,21cyclictest0-21swapper/720:40:037
10225999220,1cyclictest0-21swapper/723:25:137
10225999220,1cyclictest0-21swapper/721:45:127
10225999220,0cyclictest0-21swapper/723:00:147
102258992221,1cyclictest112180-21apt-get19:25:116
10225899220,21cyclictest0-21swapper/620:50:116
10225899220,1cyclictest290569-21ntpq00:25:186
10225899220,1cyclictest0-21swapper/620:40:196
10225599225,4cyclictest0-21swapper/522:52:445
10225599225,4cyclictest0-21swapper/521:13:535
10225599225,4cyclictest0-21swapper/519:46:015
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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