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2026-07-13 - 05:40

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 Mon Jul 13, 2026 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
803085998840,5cyclictest0-21swapper/022:05:150
803085998440,39cyclictest846013-21sendmail23:20:000
803089997830,43cyclictest0-21swapper/120:05:001
803092997729,43cyclictest0-21swapper/320:00:293
803089997328,11cyclictest0-21swapper/119:15:001
803089997140,27cyclictest825369-21cron21:20:001
803089996928,8cyclictest0-21swapper/123:50:281
803089996926,9cyclictest0-21swapper/121:40:291
803089996830,6cyclictest0-21swapper/123:40:281
803089996428,9cyclictest0-21swapper/122:30:301
803085996338,5cyclictest827912-21munin-plugin-st21:35:000
803089996024,30cyclictest0-21swapper/121:05:301
803089995643,9cyclictest840040-21apt-key22:45:011
80308599565,28cyclictest844228-21apt-get23:10:010
803085995636,12cyclictest0-21swapper/019:10:000
803090995546,6cyclictest827803-21grep21:30:302
803085995437,15cyclictest167350irq/118-8000000.ethernet-tx019:40:250
80308999534,30cyclictest0-21swapper/122:10:011
803085995345,4cyclictest167350irq/118-8000000.ethernet-tx021:35:190
803089995238,10cyclictest821998-21munin-plugin-st21:00:001
803085995244,5cyclictest167350irq/118-8000000.ethernet-tx000:00:300
803085995234,15cyclictest167350irq/118-8000000.ethernet-tx023:10:030
803090995034,10cyclictest0-21swapper/220:45:012
803090994936,9cyclictest0-21swapper/222:20:292
803085994941,4cyclictest167350irq/118-8000000.ethernet-tx021:15:160
803090994731,10cyclictest0-21swapper/219:20:002
803089994738,5cyclictest834760-21munin-plugin-st22:15:001
803085994740,4cyclictest167350irq/118-8000000.ethernet-tx022:00:210
80308599473,7cyclictest824505-21users21:10:310
803085994736,8cyclictest0-21swapper/023:25:000
803090994634,8cyclictest829503-21grep21:40:282
80308999461,22cyclictest0-21swapper/120:50:011
80308599461,41cyclictest814077-21/usr/sbin/munin20:10:270
803090994530,7cyclictest0-21swapper/221:10:292
803089994522,16cyclictest0-21swapper/119:25:011
803085994538,4cyclictest815103-21mailstats20:15:300
803085994538,4cyclictest167350irq/118-8000000.ethernet-tx020:50:220
803085994537,4cyclictest167350irq/118-8000000.ethernet-tx022:15:000
80308599452,40cyclictest859553-21unixbench_singl00:35:290
803085994513,29cyclictest807441-21grep19:30:290
803090994434,6cyclictest816021-21unixbench_multi20:20:292
803090994433,7cyclictest849277-21grep23:35:302
803090994433,7cyclictest849277-21grep23:35:302
803090994430,9cyclictest846008-21sendmail23:20:012
803090994428,13cyclictest311ktimers/222:35:142
803089994432,9cyclictest0-21swapper/100:00:321
803089994430,9cyclictest0-21swapper/123:55:291
803085994437,4cyclictest20650irq/252-8000000.ethernet00:25:230
80308599441,4cyclictest830950-21meminfo21:50:250
803090994330,8cyclictest837294-21grep22:25:262
803089994333,5cyclictest0-21swapper/123:10:271
803085994336,4cyclictest167350irq/118-8000000.ethernet-tx023:30:010
80308599432,5cyclictest825897-21meminfo21:20:240
803090994233,5cyclictest852810-21grep23:55:302
803090994232,6cyclictest843293-21grep23:00:292
803090994230,8cyclictest0-21swapper/221:05:222
803090994230,7cyclictest0-21swapper/219:45:282
803090994230,7cyclictest0-21swapper/200:05:272
803090994230,5cyclictest0-21swapper/221:55:202
803090994229,8cyclictest0-21swapper/221:15:292
803090994227,9cyclictest0-21swapper/223:10:222
803089994228,10cyclictest0-21swapper/121:25:001
803085994236,4cyclictest850245-21munin-plugin-st23:45:000
803085994236,4cyclictest0-21swapper/022:25:230
803085994235,4cyclictest0-21swapper/019:50:170
803085994235,4cyclictest0-21swapper/019:10:140
803085994234,5cyclictest167350irq/118-8000000.ethernet-tx000:30:180
803085994227,8cyclictest0-21swapper/020:55:310
80308599421,39cyclictest856442-21/usr/sbin/munin00:20:270
803090994130,7cyclictest0-21swapper/200:00:332
803090994129,8cyclictest0-21swapper/223:05:192
803089994133,4cyclictest813463-21unixbench_multi20:05:301
803089994127,9cyclictest804921-21grep19:15:291
803089994127,10cyclictest0-21swapper/119:25:281
803089994125,10cyclictest0-21swapper/123:20:001
803085994126,9cyclictest0-21swapper/023:50:280
80308599411,5cyclictest836191-21ps22:20:270
80308599411,3cyclictest812629-21/usr/sbin/munin20:05:010
80308599411,13cyclictest838856-21tail22:35:280
803090994028,8cyclictest0-21swapper/220:05:002
803090994027,6cyclictest0-21swapper/222:05:202
803090994024,11cyclictest0-21swapper/200:10:212
803090994024,11cyclictest0-21swapper/200:10:212
803089994027,8cyclictest0-21swapper/120:10:301
803089994026,11cyclictest1283-21cron22:20:001
803089994026,10cyclictest0-21swapper/120:15:311
803089994025,11cyclictest0-21swapper/122:25:261
803089994018,11cyclictest0-21swapper/123:20:231
803085994032,5cyclictest804902-21grep19:15:290
803085994032,5cyclictest0-21swapper/023:45:210
803085994029,8cyclictest0-21swapper/020:05:310
803085994023,15cyclictest0-21swapper/022:40:250
80308599401,4cyclictest854207-21memory00:05:250
80308599401,4cyclictest843126-21processes23:00:280
80308599401,4cyclictest831558-21df_inode21:55:180
80308599401,37cyclictest0-21swapper/000:15:210
803090993930,5cyclictest0-21swapper/221:45:292
803090993930,5cyclictest0-21swapper/200:30:302
803090993929,5cyclictest847651-21grep23:25:292
803090993928,8cyclictest0-21swapper/223:30:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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