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2026-08-17 - 16:49

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 Aug 17, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2719331997336,5cyclictest2756234-21cron10:44:592
2719330996336,10cyclictest231ktimers/111:15:021
2719330996336,10cyclictest231ktimers/111:15:021
271933099581,34cyclictest0-21swapper/111:15:001
271933199563,32cyclictest2742756-21/usr/sbin/munin09:25:192
2719327995640,4cyclictest15-21rcuc/011:15:010
2719327995640,4cyclictest15-21rcuc/011:15:010
271933099551,24cyclictest0-21swapper/109:00:011
271933199501,14cyclictest0-21swapper/209:15:002
2719327995038,9cyclictest2748554-21sendmail10:00:010
2719327995038,9cyclictest2748554-21sendmail10:00:010
2719327995032,16cyclictest167350irq/118-8000000.ethernet-tx009:00:000
2719331994941,5cyclictest167550irq/134-8000000.ethernet-tx208:50:282
2719330994936,8cyclictest0-21swapper/108:25:011
2719330994931,12cyclictest0-21swapper/111:05:291
271933099492,24cyclictest0-21swapper/111:30:011
271932799486,39cyclictest0-21swapper/012:15:290
2719327994840,5cyclictest0-21swapper/011:10:210
2719327994839,7cyclictest2754544-21munin-plugin-st10:35:000
2719327994838,6cyclictest167350irq/118-8000000.ethernet-tx008:10:190
2719327994836,9cyclictest0-21swapper/009:50:000
271932799483,37cyclictest1261-21rs:main0
271933099472,9cyclictest0-21swapper/112:05:011
2719327994740,4cyclictest167350irq/118-8000000.ethernet-tx010:50:250
2719327994740,4cyclictest167350irq/118-8000000.ethernet-tx007:50:300
2719327994710,34cyclictest2732358-21wc08:25:010
2719331994628,13cyclictest311ktimers/207:55:112
2719330994637,4cyclictest2772274-21sendmail12:19:591
271933099461,6cyclictest0-21swapper/108:10:021
271933099461,2cyclictest0-21swapper/110:45:011
2719327994639,4cyclictest2756241-21munin-plugin-st10:45:000
271932799461,6cyclictest2750856-21ptp4l10:10:300
2719331994517,7cyclictest2720614-21/usr/sbin/munin07:15:192
2719330994536,5cyclictest2721198-21grep07:15:291
2719330994525,10cyclictest0-21swapper/109:35:001
2719330994525,10cyclictest0-21swapper/109:35:001
2719327994538,4cyclictest0-21swapper/007:35:000
271932799452,25cyclictest0-21swapper/012:05:000
271932799451,5cyclictest0-21swapper/008:55:000
271933199444,12cyclictest2753613-21apt-get10:30:022
2719331994432,8cyclictest2724738-21sendmail07:40:002
2719330994433,6cyclictest2728038-21head07:55:281
2719330994430,7cyclictest2774715-21grep12:30:281
271933099441,5cyclictest0-21swapper/110:55:021
2719327994437,4cyclictest167350irq/118-8000000.ethernet-tx007:35:250
271932799442,39cyclictest0-21swapper/012:05:250
271932799441,6cyclictest2725207-21kernelversion07:40:270
2719331994335,5cyclictest0-21swapper/211:30:002
271933099431,23cyclictest0-21swapper/108:05:011
271932799434,6cyclictest0-21swapper/011:25:020
2719327994337,4cyclictest0-21swapper/009:40:310
2719327994335,4cyclictest167350irq/118-8000000.ethernet-tx010:00:300
2719327994327,14cyclictest167350irq/118-8000000.ethernet-tx012:10:250
2719327994320,21cyclictest20650irq/252-8000000.ethernet11:40:170
271932799431,39cyclictest2755347-21/usr/sbin/munin10:35:290
2719331994233,5cyclictest2736639-21munin-plugin-st08:50:002
2719331994218,16cyclictest0-21swapper/211:05:302
2719330994231,6cyclictest2762880-21grep11:20:271
2719330994230,8cyclictest2751824-21grep10:15:281
2719330994229,8cyclictest2745969-21unixbench_singl09:40:331
2719330994229,7cyclictest2754425-21grep10:30:311
2719327994232,5cyclictest19750irq/27-20000000.i2c10:30:020
2719327994231,8cyclictest2739178-21munin-plugin-st09:05:000
271932799421,39cyclictest0-21swapper/009:25:250
2719330994124,11cyclictest0-21swapper/111:00:261
271932799413,36cyclictest0-21swapper/007:15:000
271932799413,36cyclictest0-21swapper/007:15:000
271932799412,3cyclictest2756737-21meminfo10:45:260
271932799412,37cyclictest0-21swapper/012:20:220
271932799411,38cyclictest0-21swapper/008:35:250
2719331994033,4cyclictest2772266-21sendmail12:19:592
2719331994024,12cyclictest0-21swapper/207:40:322
2719331994024,11cyclictest0-21swapper/210:45:292
2719330994032,5cyclictest2773962-21munin-plugin-st12:30:001
2719327994034,4cyclictest2759391-21ptp4l11:00:270
2719327994034,3cyclictest2767168-21awk11:45:300
2719327994033,4cyclictest20650irq/252-8000000.ethernet08:15:180
2719327994030,5cyclictest0-21swapper/008:05:300
2719327994030,5cyclictest0-21swapper/008:05:300
2719327994029,8cyclictest0-21swapper/008:30:270
2719327994017,12cyclictest12-21ksoftirqd/007:10:010
271932799401,4cyclictest2765481-21users11:35:280
271932799401,37cyclictest0-21swapper/011:50:190
2719331993929,5cyclictest0-21swapper/212:10:002
2719331993927,9cyclictest2734945-21sendmail08:40:002
2719331993927,8cyclictest0-21swapper/209:40:332
2719331993926,8cyclictest0-21swapper/212:30:292
2719330993929,5cyclictest0-21swapper/108:15:261
2719330993928,7cyclictest0-21swapper/111:45:301
2719330993926,9cyclictest0-21swapper/110:40:001
2719330993925,8cyclictest2724414-21grep07:35:261
271933099391,22cyclictest0-21swapper/112:25:011
271932799396,7cyclictest0-21swapper/009:35:010
271932799396,7cyclictest0-21swapper/009:35:010
2719327993932,4cyclictest0-21swapper/007:25:170
2719327993932,4cyclictest0-21swapper/007:15:180
2719327993929,5cyclictest0-21swapper/010:20:260
2719327993925,8cyclictest0-21swapper/009:15:290
271932799392,32cyclictest2742348-21tail09:20:260
2719327993922,15cyclictest0-21swapper/009:35:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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