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2025-02-06 - 13:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #5

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 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 rack0slot5s.osadl.org (updated Fri Jan 24, 2025 00:46:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18443052354314,32sleep140-21swapper/1419:06:126
18443782353312,13sleep130-21swapper/1319:07:155
18443002350344,4sleep90-21swapper/919:06:0715
18444952348324,16sleep70-21swapper/719:09:0313
18443092348310,13sleep10-21swapper/119:06:161
18444092347324,15sleep80-21swapper/819:07:4214
18444382343335,5sleep30-21swapper/319:08:099
18443472342322,13sleep20-21swapper/219:06:488
18444412341319,14sleep60-21swapper/619:08:1212
18445092340319,14sleep40-21swapper/419:09:1510
18415182340333,5sleep00-21swapper/019:05:090
18415122338318,13sleep110-21swapper/1119:05:043
18445602337314,14sleep150-21swapper/1519:09:597
18442622337315,14sleep50-21swapper/519:05:3011
18443772335314,13sleep120-21swapper/1219:07:144
18443382335314,14sleep100-21swapper/1019:06:402
184489099420,41cyclictest0-21swapper/819:40:4414
1844892994040,0cyclictest0-21swapper/919:26:2915
1844907993939,0cyclictest0-21swapper/1421:16:516
1844895993921,1cyclictest0-21swapper/1023:42:502
1844884993939,0cyclictest0-21swapper/620:23:4612
1844884993837,1cyclictest0-21swapper/621:28:4812
1844902993636,0cyclictest0-21swapper/1220:23:464
1844879993534,1cyclictest0-21swapper/521:16:5111
1844868993535,0cyclictest0-21swapper/221:16:528
1844902993434,0cyclictest0-21swapper/1221:28:484
1844879993313,20cyclictest1479-21snmpd22:07:3011
184490099320,31cyclictest2526-21gnome-shell19:42:593
184488499322,0cyclictest0-21swapper/621:59:1212
1844907993131,0cyclictest0-21swapper/1400:21:156
1844890993113,17cyclictest1479-21snmpd23:54:3814
1844886993131,0cyclictest0-21swapper/719:26:3013
184486199319,0cyclictest0-21swapper/022:36:370
1844911993030,0cyclictest0-21swapper/1520:23:467
1844907993026,4cyclictest1479-21snmpd19:15:146
184488699300,30cyclictest0-21swapper/721:56:5913
184488499300,0cyclictest0-21swapper/619:57:0012
1844872993030,0cyclictest0-21swapper/419:26:2910
1844907992926,3cyclictest1479-21snmpd19:36:336
1844907992926,3cyclictest1479-21snmpd19:36:326
184490799290,28cyclictest0-21swapper/1422:41:306
184489099290,28cyclictest0-21swapper/821:40:4114
184488499295,11cyclictest0-21swapper/622:10:1112
1844879992927,2cyclictest1479-21snmpd23:50:2011
1844872992929,0cyclictest0-21swapper/421:56:5910
1844911992828,0cyclictest0-21swapper/1521:28:487
184491199280,27cyclictest0-21swapper/1520:59:057
184490799280,27cyclictest0-21swapper/1421:25:516
1844905992827,1cyclictest1479-21snmpd22:28:115
184490599280,27cyclictest0-21swapper/1321:25:485
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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