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2026-04-06 - 22:07

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 Apr 06, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2753016997110,24cyclictest0-21swapper/111:25:011
2753016996616,18cyclictest22-21rcuc/111:10:011
2753014996113,44cyclictest2767782-21latency_hist08:35:000
275301699603,19cyclictest0-21swapper/111:45:011
275301699603,19cyclictest0-21swapper/111:45:011
275301499601,9cyclictest0-21swapper/007:55:180
2753016995747,5cyclictest2754029-21cut07:15:021
2753018995337,10cyclictest1283-21cron09:15:012
2753018995337,10cyclictest1283-21cron09:15:012
275301899521,28cyclictest0-21swapper/208:55:002
275301699524,12cyclictest14-21rcu_preempt12:30:021
275301899515,21cyclictest0-21swapper/208:45:012
275301699516,19cyclictest24-21ksoftirqd/110:00:201
275301499511,48cyclictest0-21swapper/009:40:250
275301499511,46cyclictest2801692-21mailstats11:50:270
275301899501,33cyclictest0-21swapper/211:40:012
275301899501,31cyclictest0-21swapper/210:40:022
2753016995041,5cyclictest2804360-21munin-plugin-st12:10:001
2753016995041,5cyclictest2804360-21munin-plugin-st12:10:001
2753016995039,6cyclictest2760914-21grep07:50:291
2753016995028,16cyclictest0-21swapper/108:35:021
2753016995012,3cyclictest0-21swapper/109:00:011
275301499501,43cyclictest0-21swapper/008:45:130
2753018994940,5cyclictest2773707-21munin-plugin-st09:10:002
2753016994914,23cyclictest2775605-21/usr/sbin/munin09:20:191
2753014994942,4cyclictest2773706-21grep09:10:000
2753014994916,3cyclictest0-21swapper/008:40:270
2753018994834,8cyclictest2799948-21grep11:40:272
2753018994834,8cyclictest2799948-21grep11:40:262
2753016994836,8cyclictest2765164-21munin-plugin-st08:19:591
2753016994739,4cyclictest1261-21rs:main1
2753016994737,6cyclictest0-21swapper/111:20:001
2753016994735,8cyclictest0-21swapper/109:15:281
2753016994734,9cyclictest0-21swapper/108:00:201
2753014994736,8cyclictest0-21swapper/007:39:590
2753014994635,7cyclictest2760893-21grep07:50:280
2753018994536,5cyclictest167550irq/134-8000000.ethernet-tx212:10:282
2753018994534,7cyclictest2809557-21grep12:35:292
2753016994531,10cyclictest0-21swapper/107:35:001
2753016994433,7cyclictest2800837-21grep11:45:291
2753014994437,4cyclictest20650irq/252-8000000.ethernet12:20:030
275301499442,39cyclictest0-21swapper/008:25:260
275301499441,41cyclictest0-21swapper/007:40:250
275301499441,2cyclictest0-21swapper/009:55:010
2753018994333,5cyclictest0-21swapper/208:15:292
2753018994332,6cyclictest2762536-21grep08:00:272
275301699437,4cyclictest24-21ksoftirqd/112:05:011
275301499433,6cyclictest0-21swapper/009:00:280
2753014994334,5cyclictest167350irq/118-8000000.ethernet-tx011:45:000
2753014994334,5cyclictest167350irq/118-8000000.ethernet-tx011:45:000
275301499431,38cyclictest2807979-21latency_hist12:30:010
2753018994230,8cyclictest2783851-21grep10:05:292
2753016994237,2cyclictest2792445-21sendmail11:00:001
2753016994231,6cyclictest0-21swapper/112:35:291
2753016994230,7cyclictest2765917-21grep08:20:271
2753016994228,8cyclictest0-21swapper/109:54:591
275301499421,5cyclictest2774442-21grep09:10:270
275301499421,5cyclictest2774442-21grep09:10:260
275301499421,39cyclictest0-21swapper/008:00:190
2753018994130,4cyclictest0-21swapper/212:30:012
2753016994131,7cyclictest231ktimers/110:20:161
2753016994131,7cyclictest231ktimers/110:20:161
2753016994121,12cyclictest0-21swapper/112:20:021
2753016994110,25cyclictest0-21swapper/111:05:231
2753014994131,6cyclictest2794096-21grep11:05:280
2753014994130,7cyclictest0-21swapper/012:30:270
2753014994124,15cyclictest0-21swapper/011:20:230
275301499412,36cyclictest0-21swapper/011:45:190
275301499411,5cyclictest0-21swapper/007:25:240
275301499411,36cyclictest2763011-21fschecks_time08:05:210
275301499411,36cyclictest2763011-21fschecks_time08:05:210
2753018994027,9cyclictest0-21swapper/207:40:292
2753016994032,5cyclictest2782228-21grep10:00:001
275301499407,2cyclictest0-21swapper/012:00:020
2753014994032,5cyclictest2777082-21munin-plugin-st09:30:010
2753014994028,8cyclictest0-21swapper/007:35:000
275301499401,37cyclictest0-21swapper/010:25:130
275301499401,37cyclictest0-21swapper/008:15:200
275301499401,35cyclictest0-21swapper/011:30:010
275301499401,10cyclictest0-21swapper/009:25:010
2753018993929,5cyclictest0-21swapper/209:00:272
2753018993925,7cyclictest0-21swapper/207:25:302
2753016993928,6cyclictest0-21swapper/108:50:011
2753016993910,12cyclictest2798559-21/usr/sbin/munin11:35:181
275301499395,31cyclictest0-21swapper/010:54:230
2753014993931,4cyclictest2804361-21munin-plugin-st12:09:590
2753014993931,4cyclictest2804361-21munin-plugin-st12:09:590
2753014993931,4cyclictest2754202-21memory07:15:040
2753014993931,4cyclictest167350irq/118-8000000.ethernet-tx008:10:030
2753014993930,4cyclictest0-21swapper/009:50:010
2753014993930,3cyclictest20850irq/208-8000000.ethernet10:20:010
275301499392,3cyclictest2774944-21tune2fs09:15:200
275301499391,5cyclictest2771960-21sed08:55:290
275301499391,4cyclictest0-21swapper/010:45:230
275301499391,36cyclictest0-21swapper/012:00:180
275301499391,36cyclictest0-21swapper/010:55:250
275301499391,36cyclictest0-21swapper/010:20:180
275301499391,36cyclictest0-21swapper/010:20:180
275301499391,36cyclictest0-21swapper/009:55:190
275301499391,36cyclictest0-21swapper/008:20:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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