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2025-11-02 - 22:13

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 Nov 02, 2025 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16069072229170,20sleep70-21swapper/707:05:037
16091332228173,42sleep00-21swapper/007:06:480
16092722221183,25sleep50-21swapper/507:08:475
16090782221170,40sleep10-21swapper/107:06:011
16092222219186,21sleep60-21swapper/607:08:076
16092612217183,22sleep30-21swapper/307:08:373
16091462212164,14sleep40-21swapper/407:07:014
16069112208174,22sleep20-21swapper/207:05:062
1609589993836,1cyclictest1630453-21fwupd07:40:512
160960299309,4cyclictest0-21swapper/708:25:367
160960299268,14cyclictest0-21swapper/707:52:397
1609602992623,2cyclictest1662910-21apt-get08:40:127
1609602992623,2cyclictest1662910-21apt-get08:40:127
1609602992612,14cyclictest1750191-21ntpq11:10:227
160960099250,24cyclictest1786165-21munin-run12:15:006
1609594992523,1cyclictest1743205-21apt-get11:00:134
160959199250,24cyclictest1619047-21perf07:25:003
160959199250,24cyclictest0-21swapper/311:55:133
160960299240,23cyclictest1704405-21ntpq09:50:177
160960099240,23cyclictest1708906-21apt-get10:00:136
160960099240,23cyclictest0-21swapper/611:00:136
1609596992422,1cyclictest1654325-21apt-get08:25:125
160959699240,23cyclictest1662459-21apt08:40:015
160959699240,23cyclictest1662459-21apt08:40:005
160959499240,23cyclictest1786185-21taskset12:15:004
160959199240,23cyclictest0-21swapper/309:15:143
1609589992421,3cyclictest0-21swapper/207:30:132
160958999240,1cyclictest1711332-21dump-pmu-power10:05:002
160958999240,1cyclictest0-21swapper/209:05:112
160958999240,0cyclictest0-21swapper/209:45:152
160958599240,23cyclictest1766339-21apt-get11:40:151
160958599240,23cyclictest1697022-21apt09:40:001
1609602992321,1cyclictest0-21swapper/710:59:597
160960299230,22cyclictest1674341-21apt-get09:00:127
160960299230,22cyclictest0-21swapper/711:25:157
1609600992322,1cyclictest1660034-21apt-get08:35:136
1609600992322,1cyclictest1660034-21apt-get08:35:136
160960099230,23cyclictest1650774-21munin-run08:20:016
160960099230,22cyclictest0-21swapper/610:10:126
160959699230,22cyclictest0-21swapper/507:20:145
160959699230,1cyclictest0-21swapper/508:10:145
160959499230,23cyclictest1639371-21tr08:00:014
160959499230,21cyclictest0-21swapper/412:05:104
1609591992322,0cyclictest0-21swapper/309:05:123
1609591992321,1cyclictest1786586-21apt-get12:15:153
1609591992321,1cyclictest0-21swapper/312:34:593
1609591992320,2cyclictest1631197-21apt-get07:45:113
160959199230,22cyclictest0-21swapper/312:10:123
160959199230,22cyclictest0-21swapper/309:10:023
1609589992322,1cyclictest0-21swapper/210:15:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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