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2025-12-24 - 02:16

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 Dec 23, 2025 12:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11993562239176,51sleep70-21swapper/707:07:047
11993222235196,25sleep00-21swapper/007:06:320
11994462233171,19sleep30-21swapper/307:08:193
11993552220182,25sleep60-21swapper/607:07:026
11992792220183,24sleep40-21swapper/407:05:564
11993602218185,22sleep20-21swapper/207:07:072
11994892214186,18sleep10-21swapper/107:08:581
11993542210176,21sleep50-21swapper/507:07:015
1199794992620,6cyclictest1321717-21gpgv10:40:003
119979499260,1cyclictest1336465-21apt-get11:05:113
119978799250,24cyclictest1263825-21dpkg09:00:001
1199781992522,2cyclictest1390894-21run-parts12:40:000
119979999240,23cyclictest1356308-21systemctl11:40:015
1199794992422,2cyclictest0-21swapper/307:15:113
119979499240,21cyclictest0-21swapper/309:45:113
119979099240,24cyclictest0-21swapper/208:00:002
119978799240,23cyclictest1359681-21latency_hist11:45:011
1199805992321,1cyclictest0-21swapper/707:15:007
1199805992319,3cyclictest1275496-21apt-get09:20:007
119980599230,22cyclictest363-21systemd-journal09:25:007
119980599230,22cyclictest1382704-21apt-get12:25:127
119980599230,22cyclictest0-21swapper/711:45:007
119980199230,22cyclictest1293339-21apt-get09:50:116
119980199230,22cyclictest1293339-21apt-get09:50:116
119980199230,22cyclictest0-21swapper/611:40:016
119980199230,22cyclictest0-21swapper/611:30:136
119980199230,1cyclictest1321487-21munin-run10:40:016
1199799992322,1cyclictest0-21swapper/511:40:135
1199799992322,1cyclictest0-21swapper/511:30:025
1199799992318,1cyclictest1252819-21apt-get08:40:125
119979999230,22cyclictest1301490-21dump-pmu-power10:04:595
119979999230,22cyclictest1255670-21apt-get08:45:135
119979999230,22cyclictest0-21swapper/507:40:115
1199796992323,0cyclictest0-21swapper/412:15:124
1199796992323,0cyclictest0-21swapper/410:25:134
119979699230,22cyclictest1215129-21apt-get07:35:134
1199794992321,1cyclictest1244241-21apt-get08:25:133
119979499230,23cyclictest1240941-21cron08:20:003
119979099238,8cyclictest1379418-21munin-plugin-st12:20:002
1199790992322,1cyclictest1330312-21apt10:55:012
119979099230,22cyclictest1353868-21apt-get11:35:152
119979099230,22cyclictest0-21swapper/212:35:142
1199787992321,1cyclictest1223550-21munin-run07:50:001
1199787992321,1cyclictest0-21swapper/109:45:101
1199787992321,1cyclictest0-21swapper/108:20:001
119978799230,1cyclictest1321475-21apt-get10:40:011
119978199230,23cyclictest1373723-21basename12:10:000
1199805992222,0cyclictest0-21swapper/712:10:127
1199805992221,1cyclictest1232118-21turbostat.cron08:05:007
1199805992221,1cyclictest0-21swapper/708:50:147
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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