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2025-12-24 - 16:16

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 100 highest latencies:
System rack8slot4s.osadl.org (updated Wed Dec 24, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20996722235179,44sleep00-21swapper/007:09:100
20995092232203,18sleep40-21swapper/407:06:494
20996652221168,17sleep30-21swapper/307:09:053
20994552216182,22sleep60-21swapper/607:06:026
20995252213180,21sleep20-21swapper/207:07:022
20996962210178,20sleep10-21swapper/107:09:271
20997312208179,18sleep70-21swapper/707:09:577
20994632208175,21sleep50-21swapper/507:06:095
210014299260,25cyclictest0-21swapper/710:15:147
210013499260,0cyclictest0-21swapper/512:00:125
210013499260,0cyclictest0-21swapper/509:25:125
2100142992523,1cyclictest2135323-21apt-key08:10:007
210013499250,24cyclictest0-21swapper/512:30:135
210014299240,23cyclictest0-21swapper/710:40:017
210014299240,22cyclictest0-21swapper/711:45:187
210014299240,22cyclictest0-21swapper/710:30:197
2100134992423,0cyclictest0-21swapper/510:50:145
2100134992420,3cyclictest2190913-21apt-get09:45:115
2100134992420,3cyclictest2161805-21apt-get08:55:155
210013299240,23cyclictest0-21swapper/408:05:004
210013199240,23cyclictest2251201-21apt-get11:30:143
210013199240,23cyclictest2164244-21perf09:00:003
210013199240,23cyclictest0-21swapper/310:10:013
210012999240,23cyclictest0-21swapper/110:05:101
210012999240,23cyclictest0-21swapper/108:15:131
210012999240,1cyclictest0-21swapper/111:35:131
210012399240,23cyclictest2135823-21apt-get08:10:120
2100142992319,3cyclictest2120844-21cron07:44:597
210014299230,22cyclictest0-21swapper/712:30:017
210014299230,22cyclictest0-21swapper/711:50:117
210014299230,22cyclictest0-21swapper/709:05:007
210014299230,22cyclictest0-21swapper/708:55:157
2100138992321,1cyclictest2126985-21apt-get07:55:136
210013899230,22cyclictest2143993-21awk08:25:006
210013899230,1cyclictest2279779-21apt-get12:20:136
210013899230,1cyclictest0-21swapper/610:55:016
2100134992319,4cyclictest0-21swapper/511:55:145
210013499230,23cyclictest0-21swapper/512:20:005
210013499230,22cyclictest0-21swapper/511:00:015
2100132992321,1cyclictest2207626-21munin-run10:15:014
2100132992321,1cyclictest0-21swapper/407:55:194
210013299230,22cyclictest0-21swapper/410:05:014
210013299230,22cyclictest0-21swapper/407:20:004
2100131992321,1cyclictest0-21swapper/307:25:003
210013199230,22cyclictest2230750-21munin-run10:55:013
210013199230,22cyclictest2104103-21apt-get07:15:133
210013199230,22cyclictest0-21swapper/311:55:143
210013199230,22cyclictest0-21swapper/307:10:013
210013199230,1cyclictest2256923-21apt-get11:40:113
210013199230,1cyclictest2209281-21ntp_kernel_pll_10:15:193
210013199230,1cyclictest0-21swapper/311:35:133
2100130992321,1cyclictest2228320-21apt-get10:50:132
210013099231,22cyclictest0-21swapper/208:10:002
210013099230,22cyclictest0-21swapper/208:50:122
210013099230,0cyclictest0-21swapper/209:10:122
210013099230,0cyclictest0-21swapper/209:10:122
2100129992321,1cyclictest0-21swapper/107:35:131
210012999230,22cyclictest0-21swapper/111:30:151
210012999230,22cyclictest0-21swapper/108:35:111
210012999230,1cyclictest0-21swapper/111:15:001
2100123992321,1cyclictest2222616-21apt-get10:40:110
210012399230,22cyclictest2193769-21apt-get09:50:130
210012399230,22cyclictest2106543-21munin-run07:19:590
210012399230,22cyclictest0-21swapper/009:00:140
210012399230,22cyclictest0-21swapper/008:50:120
210012399230,21cyclictest0-21swapper/010:00:150
2100142992221,1cyclictest0-21swapper/707:55:137
210014299220,21cyclictest0-21swapper/709:30:137
2100138992220,2cyclictest2216890-21apt-get10:30:136
210013899220,21cyclictest0-21swapper/611:55:146
210013899220,21cyclictest0-21swapper/608:15:136
210013899220,1cyclictest2188062-21apt-get09:40:136
2100134992221,1cyclictest2214034-21apt-get10:25:115
2100134992220,2cyclictest0-21swapper/508:30:425
2100134992219,2cyclictest2190499-21perf09:45:015
2100134992216,0cyclictest0-21swapper/507:20:005
210013499220,22cyclictest0-21swapper/510:25:005
210013499220,21cyclictest2106981-21apt-get07:20:145
210013499220,21cyclictest0-21swapper/511:35:135
210013299220,21cyclictest2271202-21apt-get12:05:134
210013299220,21cyclictest0-21swapper/411:00:144
210013299220,21cyclictest0-21swapper/410:50:134
210013299220,21cyclictest0-21swapper/407:45:134
210013299220,21cyclictest0-21swapper/407:40:124
210013299220,1cyclictest0-21swapper/408:10:004
210013299220,0cyclictest0-21swapper/407:10:014
2100131992221,0cyclictest2239763-21apt-get11:10:133
2100131992220,2cyclictest2265074-21awk11:54:593
210013199220,22cyclictest2276488-21perf12:15:003
210013199220,22cyclictest2150372-21apt-get08:35:123
210013199220,21cyclictest2195076-21ntpq09:50:203
210013199220,21cyclictest0-21swapper/309:05:113
210013199220,21cyclictest0-21swapper/309:05:113
210013199220,21cyclictest0-21swapper/308:25:123
210013199220,1cyclictest0-21swapper/310:10:143
2100130992222,0cyclictest0-21swapper/209:15:132
2100130992222,0cyclictest0-21swapper/209:15:122
2100130992221,1cyclictest0-21swapper/209:40:122
210013099220,22cyclictest2239359-21awk11:10:002
210013099220,22cyclictest0-21swapper/208:34:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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