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2026-03-23 - 06:42

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 23, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25389519910092,6cyclictest0-21swapper/121:25:011
253895099762,61cyclictest0-21swapper/020:35:110
253895099732,6cyclictest2550257-21munin-run20:15:000
2538950997133,4cyclictest167350irq/118-8000000.ethernet-tx019:50:250
253895399691,24cyclictest0-21swapper/223:15:012
253895399691,24cyclictest0-21swapper/223:15:012
2538950996935,31cyclictest2593409-21proc_pri00:25:280
2538950996724,9cyclictest0-21swapper/019:30:210
2538950996724,9cyclictest0-21swapper/019:30:210
2538951996654,9cyclictest231ktimers/122:35:111
2538950996627,3cyclictest0-21swapper/020:20:140
2538950996332,4cyclictest167350irq/118-8000000.ethernet-tx000:20:270
2538950996321,15cyclictest0-21swapper/023:35:150
253895099623,4cyclictest2594076-21ssh00:30:210
2538951996144,11cyclictest2568262-21sendmail22:00:001
2538950996126,7cyclictest2557014-21grep20:50:290
253895099601,4cyclictest0-21swapper/023:15:000
253895099601,37cyclictest0-21swapper/020:25:280
253895099601,36cyclictest0-21swapper/022:15:150
2538950995926,8cyclictest0-21swapper/023:55:220
2538950995829,4cyclictest20850irq/208-8000000.ethernet19:15:240
2538950995747,4cyclictest0-21swapper/023:30:130
2538950995747,4cyclictest0-21swapper/023:30:130
253895199553,26cyclictest0-21swapper/119:20:011
253895099551,52cyclictest0-21swapper/020:55:140
2538950995430,2cyclictest0-21swapper/023:05:010
2538951995343,6cyclictest2563763-21grep21:30:301
2538951995340,7cyclictest2577641-21munin-plugin-st22:55:001
2538951995340,7cyclictest2577641-21munin-plugin-st22:55:001
2538950995345,4cyclictest0-21swapper/021:00:110
2538951995240,8cyclictest1283-21cron21:55:001
2538950995115,13cyclictest0-21swapper/023:20:280
2538950995015,30cyclictest20850irq/208-8000000.ethernet19:15:020
253895199495,9cyclictest2550266-21apt-key20:15:011
2538951994837,7cyclictest2558798-21cron21:05:001
2538951994832,11cyclictest0-21swapper/119:15:281
2538950994836,9cyclictest0-21swapper/022:00:300
253895099481,2cyclictest0-21swapper/023:45:010
2538951994737,5cyclictest2565652-21munin-plugin-st21:45:001
2538951994735,8cyclictest2544251-21sh19:40:001
2538951994734,9cyclictest2547654-21apt-get20:00:011
2538950994736,8cyclictest2545116-21munin-plugin-st19:45:000
2538951994629,13cyclictest231ktimers/121:35:111
2538951994625,14cyclictest231ktimers/123:30:161
2538951994625,14cyclictest231ktimers/123:30:161
2538951994619,13cyclictest231ktimers/122:00:131
253895099461,43cyclictest0-21swapper/020:15:140
2538953994528,10cyclictest0-21swapper/222:35:182
2538951994531,9cyclictest0-21swapper/123:10:271
2538950994539,3cyclictest0-21swapper/021:05:280
253895099451,40cyclictest0-21swapper/020:00:130
2538953994425,10cyclictest0-21swapper/221:40:022
253895399442,37cyclictest2569848-21unixbench_multi22:05:282
2538951994428,9cyclictest0-21swapper/100:25:231
2538950994437,4cyclictest167350irq/118-8000000.ethernet-tx023:05:270
2538950994425,8cyclictest0-21swapper/020:00:020
253895099441,41cyclictest0-21swapper/021:20:260
2538953994336,4cyclictest0-21swapper/221:50:302
2538953994332,8cyclictest2547639-21sendmail19:59:592
2538953994326,12cyclictest0-21swapper/219:10:002
2538951994330,8cyclictest0-21swapper/120:55:281
2538951994326,11cyclictest231ktimers/123:55:151
2538951994323,14cyclictest0-21swapper/122:40:301
2538950994336,4cyclictest167350irq/118-8000000.ethernet-tx021:30:230
2538950994329,9cyclictest0-21swapper/019:35:200
2538950994328,11cyclictest0-21swapper/022:35:220
253895399426,5cyclictest0-21swapper/200:00:012
2538951994225,14cyclictest22-21rcuc/120:40:011
2538950994234,5cyclictest0-21swapper/023:50:270
2538950994229,9cyclictest0-21swapper/021:10:270
253895099421,39cyclictest0-21swapper/023:45:120
2538953994130,6cyclictest0-21swapper/223:45:002
2538953994128,9cyclictest2573223-21unixbench_multi22:25:292
253895399411,4cyclictest0-21swapper/221:45:012
2538951994130,8cyclictest0-21swapper/123:40:001
2538951994119,16cyclictest231ktimers/121:45:121
253895099411,4cyclictest2578138-21meminfo22:55:220
253895099411,38cyclictest0-21swapper/020:45:220
253895099411,37cyclictest2577020-21grep22:50:160
253895099411,37cyclictest2577020-21grep22:50:160
2538953994031,5cyclictest0-21swapper/221:45:292
2538951994030,7cyclictest2578480-21munin-plugin-st23:00:001
2538951994029,6cyclictest0-21swapper/120:20:261
2538950994035,3cyclictest0-21swapper/020:30:220
2538950994033,4cyclictest167350irq/118-8000000.ethernet-tx023:25:130
2538950994033,4cyclictest0-21swapper/022:30:120
2538950994032,4cyclictest20850irq/208-8000000.ethernet19:25:290
253895099402,4cyclictest2545643-21tail19:45:260
2538950994021,16cyclictest0-21swapper/022:45:180
2538953993934,3cyclictest2570793-21apt22:15:002
2538953993932,4cyclictest0-21swapper/200:25:012
2538953993930,5cyclictest167550irq/134-8000000.ethernet-tx219:40:012
2538953993929,5cyclictest0-21swapper/200:30:262
2538953993927,6cyclictest0-21swapper/223:20:252
2538951993926,9cyclictest0-21swapper/122:20:281
2538951993926,9cyclictest0-21swapper/122:20:271
2538951993925,7cyclictest0-21swapper/120:25:301
2538951993924,7cyclictest0-21swapper/123:45:281
2538951993923,9cyclictest0-21swapper/120:15:291
2538951993920,12cyclictest231ktimers/100:15:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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