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2026-09-06 - 11:29

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 Sun Sep 06, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3132531997771,4cyclictest231ktimers/123:25:191
3132531997335,5cyclictest0-21swapper/100:25:011
313253399717,49cyclictest30-21rcuc/223:50:012
313252999691,58cyclictest0-21swapper/023:40:140
3132529996524,36cyclictest0-21swapper/020:00:010
3132529996224,15cyclictest12-21ksoftirqd/020:05:010
3132529995925,5cyclictest0-21swapper/000:25:010
313253199577,12cyclictest3159216-21apt-get21:45:021
3132529995650,2cyclictest0-21swapper/023:45:140
313253399544,19cyclictest0-21swapper/219:50:012
3132533995440,9cyclictest0-21swapper/219:15:012
3132533995412,21cyclictest3145825-21/usr/sbin/munin20:25:202
313253399534,22cyclictest32-21ksoftirqd/222:15:192
3132529995346,4cyclictest20850irq/208-8000000.ethernet19:40:190
3132533995243,5cyclictest3153939-21grep21:10:282
3132529995248,2cyclictest0-21swapper/020:40:200
3132529995143,4cyclictest167350irq/118-8000000.ethernet-tx023:00:260
3132533995035,10cyclictest0-21swapper/219:50:292
313252999505,7cyclictest0-21swapper/019:20:020
3132529995041,5cyclictest3138019-21sendmail19:39:590
3132529995026,21cyclictest20650irq/252-8000000.ethernet20:35:230
313252999502,44cyclictest3162496-21sendmail_mailqu22:00:290
3132533994931,12cyclictest311ktimers/223:25:152
3132529994942,4cyclictest167350irq/118-8000000.ethernet-tx023:50:260
313252999491,5cyclictest3171805-21awk22:55:280
3132533994732,10cyclictest0-21swapper/200:10:312
3132533994730,12cyclictest0-21swapper/221:30:282
3132533994722,17cyclictest311ktimers/221:40:132
3132533994722,17cyclictest311ktimers/221:40:132
3132529994740,4cyclictest167350irq/118-8000000.ethernet-tx022:25:170
3132529994735,8cyclictest0-21swapper/023:10:310
3132529994725,19cyclictest19750irq/27-20000000.i2c22:10:180
3132529994725,19cyclictest19750irq/27-20000000.i2c22:10:180
3132533994636,7cyclictest3172506-21phc2sys23:00:262
3132531994638,4cyclictest167450irq/126-8000000.ethernet-tx120:15:301
3132529994638,4cyclictest167350irq/118-8000000.ethernet-tx000:35:210
3132529994630,14cyclictest167350irq/118-8000000.ethernet-tx022:50:260
3132529994630,14cyclictest167350irq/118-8000000.ethernet-tx022:50:260
3132533994534,8cyclictest3143085-21munin-plugin-st20:10:012
3132531994534,8cyclictest3171967-21sendmail23:00:001
313252999454,7cyclictest3182081-21grep23:55:290
3132529994533,5cyclictest3133580-21sed19:15:020
313253399449,12cyclictest3184921-21/usr/sbin/munin00:15:192
313253399449,12cyclictest3184921-21/usr/sbin/munin00:15:192
3132531994433,7cyclictest0-21swapper/120:00:001
3132531994431,7cyclictest3151434-21grep20:55:281
3132529994437,4cyclictest20850irq/208-8000000.ethernet21:25:260
3132529994437,4cyclictest0-21swapper/020:00:170
3132529994436,5cyclictest0-21swapper/023:20:010
313252999442,40cyclictest0-21swapper/021:00:000
3132533994327,11cyclictest311ktimers/220:20:122
3132533994326,12cyclictest311ktimers/221:50:142
3132529994335,4cyclictest167350irq/118-8000000.ethernet-tx023:20:180
3132529994331,9cyclictest1283-21cron22:25:000
313252999432,5cyclictest3159036-21/usr/sbin/munin21:40:290
313252999432,5cyclictest3159036-21/usr/sbin/munin21:40:290
3132529994323,18cyclictest0-21swapper/021:55:240
3132529994323,18cyclictest0-21swapper/021:55:240
313252999431,5cyclictest3182705-21memory00:00:270
313252999431,40cyclictest0-21swapper/000:30:340
313252999431,39cyclictest3176671-21cut23:25:240
313252999431,38cyclictest131ktimers/023:35:270
3132533994233,5cyclictest0-21swapper/223:35:282
3132533994231,6cyclictest0-21swapper/222:25:282
3132533994230,7cyclictest3170183-21grep22:45:332
3132533994230,7cyclictest311ktimers/223:30:252
3132533994230,7cyclictest311ktimers/223:30:252
3132533994222,10cyclictest0-21swapper/222:35:222
3132533994222,10cyclictest0-21swapper/222:35:222
3132531994234,5cyclictest3176193-21cron23:25:001
3132531994232,7cyclictest3167644-21grep22:30:331
3132531994230,8cyclictest0-21swapper/119:15:011
3132531994228,9cyclictest0-21swapper/120:00:271
3132529994235,3cyclictest3151903-21tune2fs21:00:200
3132529994224,15cyclictest3185220-21meminfo00:15:230
3132529994224,15cyclictest3185220-21meminfo00:15:230
313252999421,4cyclictest0-21swapper/022:20:000
3132533994127,11cyclictest0-21swapper/221:35:282
3132533994126,8cyclictest0-21swapper/219:35:292
3132531994132,5cyclictest0-21swapper/119:50:201
3132531994132,4cyclictest3142979-21tail20:05:271
3132531994128,9cyclictest0-21swapper/120:20:291
3132531994124,13cyclictest0-21swapper/119:30:201
3132531994124,13cyclictest0-21swapper/119:30:191
3132531994124,11cyclictest0-21swapper/122:40:261
313252999414,35cyclictest12-21ksoftirqd/021:45:050
313252999412,4cyclictest3149837-21munin-run20:50:000
313252999411,3cyclictest0-21swapper/022:35:010
313252999411,38cyclictest0-21swapper/019:50:270
3132533994028,8cyclictest0-21swapper/220:40:322
3132533994028,7cyclictest3149748-21grep20:45:272
3132531994029,6cyclictest0-21swapper/119:20:301
3132529994033,4cyclictest15-21rcuc/021:05:310
3132529994032,5cyclictest3157513-21cron21:35:000
313252999401,7cyclictest0-21swapper/023:35:010
313252999401,7cyclictest0-21swapper/023:35:010
313252999401,3cyclictest3183502-21irqstats00:05:230
313252999401,36cyclictest3146437-21users20:25:310
3132533993928,6cyclictest0-21swapper/223:10:012
3132533993927,8cyclictest3182960-21grep00:00:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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