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2026-01-09 - 03:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Fri Jan 09, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
792809997011,49cyclictest15-21rcuc/000:10:010
79280999687,25cyclictest0-21swapper/023:10:000
79281499673,30cyclictest30-21rcuc/221:15:022
792812996117,11cyclictest828226-21apt-get22:35:021
792809995946,9cyclictest0-21swapper/020:15:120
79280999576,34cyclictest15-21rcuc/022:15:010
792814995646,6cyclictest845206-21munin-plugin-st00:15:002
792812995544,6cyclictest806008-21munin-plugin-st20:25:001
792809995410,11cyclictest802531-21apt-get20:05:010
792814995336,12cyclictest839299-21sendmail23:39:592
79281299539,19cyclictest22-21rcuc/121:05:011
79281499521,2cyclictest0-21swapper/220:30:192
792812995242,6cyclictest802534-21munin-plugin-st20:05:001
792814995139,8cyclictest1283-21cron20:50:002
792809995142,5cyclictest167350irq/118-8000000.ethernet-tx022:40:280
792809995142,4cyclictest167350irq/118-8000000.ethernet-tx019:40:020
792809995129,15cyclictest131ktimers/020:30:120
792809995123,25cyclictest0-21swapper/020:45:210
792809995040,5cyclictest847681-21unixbench_singl00:25:290
792809995034,11cyclictest131ktimers/023:25:120
792814994941,5cyclictest828230-21munin-plugin-st22:35:002
792812994911,9cyclictest799900-21apt-get19:50:011
792809994941,6cyclictest131ktimers/022:20:150
792809994932,11cyclictest793725-21latency_hist19:15:010
792814994841,4cyclictest806849-21munin-plugin-st20:30:002
792812994833,9cyclictest0-21swapper/100:35:271
792809994844,2cyclictest0-21swapper/019:50:120
792809994840,4cyclictest821381-21munin-plugin-st21:55:010
792814994734,8cyclictest0-21swapper/221:50:292
792812994740,5cyclictest22-21rcuc/120:45:011
792812994738,5cyclictest0-21swapper/123:00:001
792814994632,9cyclictest0-21swapper/222:45:292
792814994632,9cyclictest0-21swapper/222:45:292
792814994628,12cyclictest0-21swapper/222:15:022
792812994627,12cyclictest0-21swapper/120:25:271
792809994639,5cyclictest840991-21munin-plugin-st23:50:000
792809994639,5cyclictest840991-21munin-plugin-st23:50:000
792809994638,4cyclictest167350irq/118-8000000.ethernet-tx019:25:280
792809994638,4cyclictest167350irq/118-8000000.ethernet-tx000:15:180
792809994638,4cyclictest167350irq/118-8000000.ethernet-tx000:15:180
792809994631,9cyclictest0-21swapper/019:15:280
792809994529,11cyclictest0-21swapper/021:25:000
792809994525,18cyclictest0-21swapper/020:05:200
79280999452,4cyclictest812601-21meminfo21:00:230
792812994435,4cyclictest0-21swapper/121:55:281
79281299441,3cyclictest0-21swapper/119:40:031
792809994436,5cyclictest20850irq/208-8000000.ethernet20:25:280
79280999442,5cyclictest848253-21memory00:30:250
79280999442,5cyclictest848253-21memory00:30:250
792809994423,15cyclictest0-21swapper/019:20:250
792814994336,4cyclictest798124-21sendmail19:40:002
792814994330,9cyclictest812831-21grep21:00:272
792814994330,6cyclictest0-21swapper/221:35:002
792812994325,13cyclictest231ktimers/119:55:101
792809994336,4cyclictest0-21swapper/022:45:300
792809994336,4cyclictest0-21swapper/022:45:300
792809994334,6cyclictest805544-21fschecks_time20:20:200
792809994332,8cyclictest131ktimers/022:55:170
79280999432,36cyclictest812149-21latency_hist21:00:010
792809994323,13cyclictest131ktimers/023:00:110
792809994323,13cyclictest131ktimers/023:00:110
792809994310,30cyclictest131ktimers/023:40:290
792814994229,9cyclictest0-21swapper/200:30:222
792814994229,9cyclictest0-21swapper/200:30:212
792812994236,4cyclictest231ktimers/121:50:011
792812994235,4cyclictest22-21rcuc/122:10:011
792812994227,9cyclictest800763-21grep19:50:291
792812994227,11cyclictest231ktimers/119:35:161
79280999428,32cyclictest0-21swapper/021:30:000
792809994234,4cyclictest801605-21unixbench_singl19:55:280
79280999423,36cyclictest131ktimers/023:15:170
79280999423,36cyclictest131ktimers/023:15:170
79280999422,4cyclictest817665-21memory21:30:240
79280999421,4cyclictest15-21rcuc/021:15:270
792814994122,9cyclictest0-21swapper/200:15:272
792814994122,9cyclictest0-21swapper/200:15:272
792814994120,17cyclictest0-21swapper/222:00:272
792812994130,8cyclictest0-21swapper/119:30:261
792812994129,8cyclictest826497-21grep22:20:271
792812994129,7cyclictest845105-21grep00:10:301
792812994129,5cyclictest0-21swapper/123:20:261
792812994128,9cyclictest0-21swapper/119:25:281
792812994122,11cyclictest0-21swapper/120:45:301
792809994135,3cyclictest0-21swapper/000:35:260
792809994133,3cyclictest1660-21snmpd22:00:250
792809994126,8cyclictest0-21swapper/022:00:010
792809994125,11cyclictest0-21swapper/022:50:270
79280999411,6cyclictest836295-21sh23:20:180
79280999411,38cyclictest0-21swapper/023:35:250
79281499409,28cyclictest32-21ksoftirqd/222:50:272
792814994031,5cyclictest799905-21munin-plugin-st19:50:002
792814994021,10cyclictest0-21swapper/223:10:282
792812994027,8cyclictest0-21swapper/119:15:291
792812994024,10cyclictest0-21swapper/100:35:011
792812994024,10cyclictest0-21swapper/100:35:011
792812994023,13cyclictest0-21swapper/123:30:011
792812994023,12cyclictest231ktimers/121:05:141
792809994024,11cyclictest0-21swapper/020:40:190
79280999402,36cyclictest0-21swapper/022:05:120
792809994023,14cyclictest0-21swapper/023:30:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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