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2026-03-16 - 16:39

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 Mar 16, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9718489910292,6cyclictest131ktimers/008:55:010
97185299811,48cyclictest0-21swapper/211:10:182
97185299711,46cyclictest0-21swapper/208:50:022
97185299711,46cyclictest0-21swapper/208:50:022
971851997012,15cyclictest1003802-21/usr/sbin/munin10:15:181
97184899704,34cyclictest131ktimers/011:10:010
971852996928,36cyclictest0-21swapper/212:30:232
97185299681,55cyclictest0-21swapper/208:55:112
97185299671,53cyclictest0-21swapper/211:55:112
97185299671,52cyclictest0-21swapper/209:35:122
97185299661,53cyclictest0-21swapper/209:40:122
97185299661,51cyclictest0-21swapper/207:15:132
97185199665,21cyclictest0-21swapper/112:00:011
971852996521,38cyclictest0-21swapper/208:30:192
97185299651,53cyclictest0-21swapper/207:10:122
97185299651,52cyclictest0-21swapper/210:10:152
97185299651,52cyclictest0-21swapper/207:30:112
97185299641,49cyclictest0-21swapper/208:10:152
97185299641,49cyclictest0-21swapper/208:10:152
97185299631,50cyclictest0-21swapper/210:35:102
97185299631,50cyclictest0-21swapper/210:35:102
97185299631,49cyclictest0-21swapper/211:15:112
97185299631,49cyclictest0-21swapper/211:15:112
97185299631,46cyclictest0-21swapper/212:05:102
971851996312,12cyclictest1019813-21rm11:50:021
971852996227,26cyclictest0-21swapper/211:30:292
971852996227,26cyclictest0-21swapper/211:30:292
97185299621,46cyclictest0-21swapper/207:50:112
97185299611,48cyclictest0-21swapper/211:20:132
97185299611,48cyclictest0-21swapper/209:45:112
97185299611,48cyclictest0-21swapper/208:45:152
97185299611,48cyclictest0-21swapper/207:55:142
97185299611,47cyclictest0-21swapper/212:10:152
97185299611,47cyclictest0-21swapper/209:25:122
97185299611,47cyclictest0-21swapper/209:15:102
97185299611,46cyclictest0-21swapper/210:40:142
97185299611,39cyclictest0-21swapper/210:05:002
97185299601,47cyclictest0-21swapper/209:05:142
97185299591,44cyclictest0-21swapper/210:20:142
971852995823,31cyclictest1018227-21df11:40:182
97185299581,45cyclictest0-21swapper/212:15:132
97185299572,47cyclictest991346-21/usr/sbin/munin09:00:262
97185299572,47cyclictest981678-21/usr/sbin/munin08:05:292
97185299572,47cyclictest981279-21/usr/sbin/munin08:00:272
97185299571,48cyclictest984481-21/usr/sbin/munin08:20:242
97185299571,47cyclictest1012593-21/usr/sbin/munin11:05:252
97185299571,45cyclictest0-21swapper/212:35:132
97185299571,45cyclictest0-21swapper/210:45:122
97185299571,43cyclictest0-21swapper/207:40:132
971848995733,19cyclictest0-21swapper/011:00:120
97185299561,46cyclictest973999-21munin-node07:20:112
97185299561,45cyclictest994355-21apt-get09:20:122
97185299561,44cyclictest987591-21/usr/sbin/munin08:40:112
97185299561,44cyclictest0-21swapper/207:35:122
97185299561,43cyclictest0-21swapper/209:10:112
97185199563,14cyclictest0-21swapper/110:55:011
971851995631,13cyclictest231ktimers/107:50:121
97185299552,46cyclictest1006342-21apt-get10:30:112
97185299552,45cyclictest1017637-21/usr/sbin/munin11:35:262
97185299551,47cyclictest1010091-21/usr/sbin/munin10:50:272
97185299551,43cyclictest0-21swapper/209:30:142
971848995512,36cyclictest977339-21latency_hist07:40:010
97185299542,44cyclictest1002360-21/usr/sbin/munin10:05:262
97185299541,47cyclictest983615-21/usr/sbin/munin08:15:222
97185299541,47cyclictest0-21swapper/211:25:192
97185299541,45cyclictest1021687-21/usr/sbin/munin12:00:152
97185299541,44cyclictest1025017-21apt-get12:20:142
97185299541,42cyclictest0-21swapper/212:25:112
97185299541,42cyclictest0-21swapper/212:25:102
97185299541,38cyclictest996656-21kworker/u8:1+flush-179:9609:55:042
97185299541,38cyclictest996656-21kworker/u8:1+flush-179:9609:55:042
971848995445,4cyclictest20650irq/252-8000000.ethernet08:10:280
971848995445,4cyclictest20650irq/252-8000000.ethernet08:10:280
97185299533,43cyclictest974838-21munin-node07:25:112
97185299531,46cyclictest1010555-21munin-node10:55:112
97185299531,45cyclictest985056-21apt-get08:25:132
97185299531,45cyclictest1019364-21/usr/sbin/munin11:45:262
97185299531,45cyclictest1011626-21/usr/sbin/munin11:00:222
97185299531,40cyclictest0-21swapper/207:45:132
971848995333,13cyclictest15-21rcuc/011:00:000
97185299521,43cyclictest1005584-21/usr/sbin/munin10:25:182
97185299521,43cyclictest1003805-21apt-get10:15:162
97184899522,2cyclictest0-21swapper/011:15:010
97185299511,43cyclictest999622-21/usr/sbin/munin09:50:212
97185299511,35cyclictest1010348-21kworker/u8:1+flush-179:9611:50:052
971848995143,5cyclictest20650irq/252-8000000.ethernet10:35:260
971848995143,5cyclictest20650irq/252-8000000.ethernet10:35:260
971848995141,5cyclictest167350irq/118-8000000.ethernet-tx011:45:280
97184899511,48cyclictest0-21swapper/011:40:300
97185299501,41cyclictest986997-21/usr/sbin/munin08:35:222
971848995026,20cyclictest0-21swapper/008:25:270
97184899501,42cyclictest1014716-21latency_hist11:20:020
97184899501,42cyclictest1014716-21latency_hist11:20:020
971851994922,13cyclictest0-21swapper/107:25:281
971848994942,4cyclictest20650irq/252-8000000.ethernet09:55:010
971848994942,4cyclictest20650irq/252-8000000.ethernet08:30:220
971851994838,6cyclictest1015360-21grep11:20:281
971848994822,11cyclictest0-21swapper/011:35:000
971848994822,11cyclictest0-21swapper/011:35:000
971848994740,4cyclictest20650irq/252-8000000.ethernet12:35:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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