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2026-03-13 - 23:24

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 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 Mar 13, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11398432232169,22sleep30-21swapper/307:07:403
11397052221171,15sleep40-21swapper/407:05:414
11397722219182,24sleep60-21swapper/607:06:396
11398472218185,21sleep70-21swapper/707:07:447
11399972215161,43sleep50-21swapper/507:09:515
11399372215183,20sleep20-21swapper/207:09:002
11397852211177,22sleep10-21swapper/107:06:501
11375592208178,19sleep00-21swapper/007:05:040
12395312470,1sleep10-21swapper/110:00:091
114023799393,18cyclictest0-21swapper/710:10:147
114023799393,18cyclictest0-21swapper/710:10:147
114023799300,17cyclictest0-21swapper/711:05:097
114023799300,17cyclictest0-21swapper/710:43:117
114023799300,17cyclictest0-21swapper/708:53:217
114023799300,17cyclictest0-21swapper/707:47:277
114023799290,16cyclictest0-21swapper/712:00:057
114021699290,2cyclictest1258597-21sh10:35:001
1140237992714,13cyclictest879-21mta-sts-daemon07:36:287
114021699260,22cyclictest0-21swapper/110:25:101
114021699260,21cyclictest1282147-21apt-get11:15:111
114021699260,1cyclictest1163752-21awk07:50:001
114022399250,24cyclictest0-21swapper/307:25:123
114021699250,0cyclictest0-21swapper/111:30:101
114022799240,23cyclictest1218345-21munin-run09:25:005
114022799240,23cyclictest1215452-21cron09:20:005
114022799240,1cyclictest0-21swapper/508:45:005
1140221992422,1cyclictest0-21swapper/209:45:002
114021699240,21cyclictest0-21swapper/112:00:111
1140237992321,1cyclictest0-21swapper/709:30:007
114023799230,22cyclictest1290304-21apt-get11:30:017
1140227992321,1cyclictest1267602-21apt-get10:50:105
1140227992321,1cyclictest1264335-21munin-run10:45:005
114022799230,23cyclictest1238614-21sleep10:00:005
114022799230,22cyclictest0-21swapper/512:15:115
114022799230,22cyclictest0-21swapper/511:00:105
114022799230,1cyclictest1284589-21munin-run11:20:005
1140226992321,1cyclictest0-21swapper/408:00:114
114022699230,22cyclictest0-21swapper/411:35:124
1140223992321,1cyclictest0-21swapper/309:20:123
114022399230,23cyclictest1201211-21idleruntime-cro08:55:003
114022399230,23cyclictest0-21swapper/310:10:103
114022399230,23cyclictest0-21swapper/310:10:103
114022399230,22cyclictest1250466-21apt-get10:20:103
1140221992321,1cyclictest1276442-21apt-get11:05:122
1140221992320,2cyclictest1314109-21apt-get12:10:112
114022199230,22cyclictest1328394-21apt-get12:35:112
114022199230,22cyclictest1239035-21apt-get10:00:092
114022199230,22cyclictest1201606-21apt-get08:55:122
114022199230,22cyclictest0-21swapper/210:25:112
114022199230,22cyclictest0-21swapper/209:30:112
114022199230,22cyclictest0-21swapper/208:30:102
1140216992320,3cyclictest0-21swapper/111:00:101
1140216992320,2cyclictest0-21swapper/111:55:111
1140216992319,0cyclictest0-21swapper/112:15:111
114021699230,22cyclictest0-21swapper/112:05:101
1140215992321,1cyclictest1267186-21munin-run10:50:000
114021599230,22cyclictest0-21swapper/007:35:110
114021599230,1cyclictest0-21swapper/010:10:000
114021599230,1cyclictest0-21swapper/010:10:000
1140237992220,1cyclictest1253318-21apt-get10:25:117
114023799220,21cyclictest1184212-21apt-get08:25:137
114023799220,21cyclictest0-21swapper/708:30:107
114023799220,21cyclictest0-21swapper/707:20:107
1140232992220,1cyclictest0-21swapper/612:30:106
114023299220,22cyclictest1227211-21sendmail-msp09:40:006
114023299220,21cyclictest1221884-21apt-get09:30:116
114023299220,21cyclictest0-21swapper/611:50:166
114023299220,21cyclictest0-21swapper/611:20:106
1140227992221,1cyclictest1181357-21apt-get08:20:105
1140227992221,0cyclictest0-21swapper/511:10:125
1140227992220,1cyclictest0-21swapper/509:00:005
114022799220,21cyclictest0-21swapper/512:25:135
114022799220,21cyclictest0-21swapper/510:35:115
1140226992220,1cyclictest1311257-21apt-get12:05:104
114022699220,22cyclictest1310842-21munin-run12:05:004
114022699220,22cyclictest0-21swapper/408:50:004
114022699220,21cyclictest1290990-21apt-get11:30:104
114022699220,21cyclictest1279296-21apt-get11:10:124
114022699220,21cyclictest0-21swapper/412:20:104
114022699220,21cyclictest0-21swapper/408:20:104
114022699220,21cyclictest0-21swapper/407:20:094
1140223992221,1cyclictest1305534-21apt-get11:55:113
114022399220,22cyclictest0-21swapper/311:05:113
114022399220,21cyclictest0-21swapper/312:25:133
114022399220,21cyclictest0-21swapper/310:35:113
114022399220,21cyclictest0-21swapper/307:40:133
1140221992221,1cyclictest1299834-21apt-get11:45:142
1140221992221,1cyclictest0-21swapper/209:20:122
1140221992220,2cyclictest1166587-21munin-run07:55:002
1140221992220,1cyclictest1247177-21grep10:15:002
1140221992220,1cyclictest1247177-21grep10:15:002
1140221992219,2cyclictest1192386-21idleruntime-cro08:40:002
114022199220,22cyclictest0-21swapper/211:30:012
114022199220,21cyclictest0-21swapper/210:45:122
114022199220,21cyclictest0-21swapper/210:35:112
114022199220,21cyclictest0-21swapper/210:20:102
114022199220,21cyclictest0-21swapper/207:40:122
114022199220,1cyclictest0-21swapper/211:40:012
1140216992222,0cyclictest0-21swapper/108:10:111
1140216992221,1cyclictest1207329-21apt-get09:05:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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