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2026-03-16 - 01:45

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 Mar 15, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
861779911215,59cyclictest94020-21apt-get07:55:010
8617799851,80cyclictest0-21swapper/008:05:010
8617799851,80cyclictest0-21swapper/008:05:010
8617799851,2cyclictest0-21swapper/009:00:020
86182997429,39cyclictest0-21swapper/212:35:282
86177997239,28cyclictest20650irq/252-8000000.ethernet10:40:010
86182997027,5cyclictest0-21swapper/211:30:202
86182997025,8cyclictest93959-21grep07:50:282
86177997045,22cyclictest92342-21munin-plugin-st07:44:590
86177997029,33cyclictest0-21swapper/008:40:270
86182996936,27cyclictest140043-21grep12:20:282
86182996932,33cyclictest92299-21unixbench_singl07:40:282
86182996931,33cyclictest0-21swapper/208:50:292
86182996926,6cyclictest0-21swapper/209:50:272
86177996937,28cyclictest0-21swapper/012:20:000
86180996810,38cyclictest0-21swapper/112:40:011
8618099678,14cyclictest119748-21/usr/sbin/munin10:25:201
8617799671,9cyclictest0-21swapper/011:30:000
86182996630,9cyclictest0-21swapper/207:40:012
86182996528,4cyclictest0-21swapper/207:10:342
86177996530,30cyclictest0-21swapper/010:30:280
86182996429,30cyclictest0-21swapper/208:25:202
86182996423,7cyclictest0-21swapper/211:55:292
86182996423,7cyclictest0-21swapper/209:05:282
86180996423,20cyclictest113525-21kworker/u8:2+ext4-rsv-conversion10:00:061
86177996428,32cyclictest0-21swapper/007:55:290
86182996330,27cyclictest0-21swapper/211:10:272
86182996327,6cyclictest0-21swapper/210:50:002
86182996325,5cyclictest0-21swapper/209:40:212
86182996322,9cyclictest0-21swapper/210:40:292
86182996322,9cyclictest0-21swapper/210:40:282
8618099636,18cyclictest124984-21/usr/sbin/munin10:55:201
86180996351,8cyclictest0-21swapper/112:15:001
8617799631,58cyclictest100531-21meminfo08:30:230
8617799631,2cyclictest0-21swapper/009:40:010
8617799631,2cyclictest0-21swapper/009:40:010
86182996228,27cyclictest0-21swapper/207:20:252
86182996123,9cyclictest0-21swapper/208:20:192
86180996130,15cyclictest0-21swapper/108:35:111
86182996032,7cyclictest107512-21grep09:10:272
86182996028,4cyclictest0-21swapper/210:20:222
86177996013,43cyclictest137524-21grep12:05:270
86177996013,43cyclictest137524-21grep12:05:270
86182995923,10cyclictest0-21swapper/209:00:192
8618099598,33cyclictest0-21swapper/108:05:011
8618099598,33cyclictest0-21swapper/108:05:011
8618099598,15cyclictest0-21swapper/111:25:011
8618099598,15cyclictest0-21swapper/111:25:011
86177995937,18cyclictest0-21swapper/010:20:000
86177995937,18cyclictest0-21swapper/010:20:000
86177995930,27cyclictest20850irq/208-8000000.ethernet11:55:240
86177995925,31cyclictest0-21swapper/008:50:010
8617799592,4cyclictest99489-21lsblk08:25:200
86180995841,11cyclictest106989-21apt-get09:10:151
86177995832,22cyclictest0-21swapper/012:14:590
86177995830,24cyclictest0-21swapper/012:20:270
86177995829,24cyclictest106912-21cat09:10:010
86177995824,31cyclictest0-21swapper/011:05:270
8617799581,55cyclictest115228-21munin-run10:00:000
86180995741,10cyclictest92538-21/usr/sbin/munin07:45:291
86180995741,10cyclictest92538-21/usr/sbin/munin07:45:291
86177995728,26cyclictest0-21swapper/010:55:290
86177995728,25cyclictest0-21swapper/010:00:280
8617799571,8cyclictest0-21swapper/009:15:010
8617799571,50cyclictest132525-21latency_hist11:40:010
86182995627,8cyclictest0-21swapper/209:00:002
86182995627,8cyclictest0-21swapper/209:00:002
86180995638,10cyclictest88326-21apt-get07:20:151
86180995633,11cyclictest0-21swapper/107:55:131
86180995627,17cyclictest134097-21sed11:45:261
86177995631,21cyclictest0-21swapper/009:30:270
86177995627,24cyclictest0-21swapper/007:15:280
86177995626,25cyclictest0-21swapper/012:30:300
86180995534,14cyclictest0-21swapper/107:35:141
86180995529,15cyclictest138774-21/usr/sbin/munin12:15:221
86177995530,21cyclictest0-21swapper/009:25:280
8617799552,8cyclictest114305-21/usr/sbin/munin09:50:270
86177995514,37cyclictest0-21swapper/007:20:280
86177995512,39cyclictest112203-21tune2fs09:40:200
86177995511,35cyclictest0-21swapper/012:05:010
8617799550,43cyclictest0-21swapper/010:50:000
86182995423,8cyclictest0-21swapper/207:25:282
86180995430,12cyclictest0-21swapper/108:55:141
86180995430,12cyclictest0-21swapper/108:55:141
86177995436,15cyclictest99184-21cron08:25:000
86177995423,27cyclictest0-21swapper/009:00:000
86177995423,27cyclictest0-21swapper/009:00:000
86177995419,31cyclictest0-21swapper/011:45:000
86177995418,28cyclictest98472-21latency_hist08:20:010
8617799541,2cyclictest0-21swapper/008:40:010
86182995327,4cyclictest0-21swapper/210:30:282
86180995337,11cyclictest127523-21apt-get11:10:161
86180995334,12cyclictest135520-21/usr/sbin/munin11:55:261
86180995333,12cyclictest102834-21/usr/sbin/munin08:45:161
86180995331,13cyclictest0-21swapper/108:40:201
86180995314,13cyclictest0-21swapper/109:40:011
86180995314,13cyclictest0-21swapper/109:40:011
8617799538,32cyclictest23850irq/422-mmc110:40:050
8617799538,32cyclictest23850irq/422-mmc110:40:050
86177995337,13cyclictest20650irq/252-8000000.ethernet11:25:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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