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2026-08-15 - 10:54

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 100 highest latencies:
System rack8slot4s.osadl.org (updated Thu Aug 13, 2026 12:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7836742246174,23sleep20-21swapper/207:06:082
7839162245176,22sleep50-21swapper/507:09:335
7838052233171,19sleep30-21swapper/307:08:023
7837052222182,27sleep60-21swapper/607:06:366
7837282220182,25sleep00-21swapper/007:06:540
7838512218179,25sleep40-21swapper/407:08:444
7838942217183,22sleep10-21swapper/107:09:131
7837062215175,26sleep70-21swapper/707:06:377
78414299290,29cyclictest861559-21cron09:20:010
78415999280,4cyclictest920619-21cron11:00:007
78415699260,25cyclictest846838-21dump-pmu-power08:55:026
78415499260,4cyclictest805492-21ls07:45:025
78415499260,4cyclictest805492-21ls07:45:025
784150992620,6cyclictest826197-21sendmail08:20:024
78415099260,0cyclictest0-21swapper/408:00:044
784148992624,1cyclictest841379-21apt-get08:45:103
784148992624,1cyclictest0-21swapper/311:00:023
78415699250,25cyclictest800197-21tr07:35:136
78415099250,24cyclictest0-21swapper/411:25:144
78415099250,24cyclictest0-21swapper/411:20:134
78415099250,24cyclictest0-21swapper/408:25:204
78415099250,21cyclictest924063-21apt-get11:05:124
78415099250,21cyclictest0-21swapper/409:10:024
78415099250,0cyclictest0-21swapper/409:20:134
784142992519,3cyclictest0-21swapper/007:30:200
78414299250,21cyclictest0-21swapper/011:50:200
784159992420,3cyclictest856112-21chrt09:10:127
78415999240,23cyclictest810191-21grep07:50:207
78415999240,1cyclictest950619-21apt-get11:50:147
78415699240,1cyclictest918124-21apt-get10:55:146
78415499240,24cyclictest823266-21sleep08:15:025
784150992423,1cyclictest0-21swapper/409:55:014
784150992419,5cyclictest947298-21ls11:45:014
78414899240,23cyclictest0-21swapper/311:50:123
78414899240,23cyclictest0-21swapper/311:05:193
78414699240,23cyclictest0-21swapper/211:40:202
78414399240,24cyclictest905885-21awk10:35:011
784142992421,3cyclictest793681-21awk07:25:020
784142992419,5cyclictest830965-21ntp_states08:25:200
78414299240,23cyclictest0-21swapper/011:00:130
78414299240,22cyclictest0-21swapper/008:10:190
78414299240,1cyclictest959474-21apt-get12:05:120
784159992322,1cyclictest894504-21apt-get10:15:147
784159992319,3cyclictest928339-21awk11:10:197
784159992319,3cyclictest926586-21perf11:10:007
784159992319,3cyclictest867474-21grep09:30:027
78415999230,23cyclictest0-21swapper/709:55:027
78415999230,23cyclictest0-21swapper/709:35:187
78415999230,22cyclictest859050-21apt-get09:15:127
78415999230,22cyclictest0-21swapper/711:35:137
78415999230,22cyclictest0-21swapper/711:35:127
78415999230,1cyclictest799980-21apt-get07:35:137
78415699230,23cyclictest967922-21awk12:20:026
78415699230,1cyclictest0-21swapper/609:20:016
78415699230,1cyclictest0-21swapper/607:10:116
78415499230,23cyclictest979702-21readlink12:40:025
78415499230,23cyclictest0-21swapper/507:10:125
78415499230,22cyclictest912037-21cut10:45:015
78415499230,22cyclictest0-21swapper/508:55:125
784150992321,2cyclictest0-21swapper/411:55:134
784150992319,3cyclictest0-21swapper/411:30:134
78415099230,22cyclictest0-21swapper/412:10:154
78415099230,22cyclictest0-21swapper/410:20:204
78415099230,22cyclictest0-21swapper/408:10:144
78415099230,22cyclictest0-21swapper/407:55:024
78415099230,22cyclictest0-21swapper/407:20:124
78415099230,1cyclictest814336-21latency_hist08:00:014
78414899230,23cyclictest913522-21ntpq10:45:183
78414899230,23cyclictest0-21swapper/309:20:023
78414899230,22cyclictest941739-21apt-get11:35:123
78414899230,22cyclictest941739-21apt-get11:35:123
78414899230,22cyclictest0-21swapper/310:40:133
78414899230,22cyclictest0-21swapper/307:40:153
78414899230,22cyclictest0-21swapper/307:40:153
784146992323,0cyclictest0-21swapper/210:05:132
784146992321,1cyclictest0-21swapper/207:50:202
78414699230,22cyclictest947209-21apt-get11:45:042
78414699230,22cyclictest929946-21apt-get11:15:122
78414699230,22cyclictest0-21swapper/212:15:152
78414699230,22cyclictest0-21swapper/211:20:122
78414699230,22cyclictest0-21swapper/210:00:142
784143992323,0cyclictest0-21swapper/111:54:571
784143992323,0cyclictest0-21swapper/111:35:131
784143992323,0cyclictest0-21swapper/111:35:131
784143992322,1cyclictest947674-21apt-get11:45:111
784143992322,1cyclictest0-21swapper/111:00:011
78414399230,23cyclictest0-21swapper/107:25:201
78414399230,22cyclictest944702-21apt-get11:40:141
78414399230,22cyclictest847263-21apt-get08:55:121
78414399230,22cyclictest797042-21apt-get07:30:151
78414399230,22cyclictest0-21swapper/110:40:141
784142992321,1cyclictest938796-21apt-get11:30:120
784142992320,3cyclictest0-21swapper/011:45:020
78414299230,23cyclictest0-21swapper/010:10:140
78414299230,22cyclictest0-21swapper/009:35:130
78414299230,22cyclictest0-21swapper/009:10:120
78414299230,0cyclictest0-21swapper/010:30:130
78414299230,0cyclictest0-21swapper/009:25:130
784159992222,0cyclictest0-21swapper/707:45:127
784159992222,0cyclictest0-21swapper/707:45:127
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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