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2026-04-03 - 04:29

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 Fri Apr 03, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3839621998029,11cyclictest0-21swapper/121:10:001
383962599641,39cyclictest0-21swapper/220:20:012
383962599595,29cyclictest0-21swapper/221:55:012
383962199591,7cyclictest0-21swapper/121:35:011
3839619995951,6cyclictest3849418-21cat20:05:010
383962599569,4cyclictest3849319-21apt-get20:05:022
3839621995648,4cyclictest0-21swapper/123:35:191
3839621995648,4cyclictest0-21swapper/123:35:181
3839621995449,3cyclictest0-21swapper/122:10:181
383961999541,18cyclictest3865627-21rm21:40:010
383961999516,12cyclictest0-21swapper/021:20:020
3839619995143,4cyclictest20850irq/208-8000000.ethernet19:35:190
383961999505,6cyclictest0-21swapper/019:35:010
3839619995041,6cyclictest3857850-21grep20:55:000
383961999501,9cyclictest0-21swapper/000:05:190
3839621994935,7cyclictest3892647-21apt-get00:20:021
383962199492,19cyclictest24-21ksoftirqd/121:50:011
3839619994928,14cyclictest167350irq/118-8000000.ethernet-tx023:10:120
383961999491,7cyclictest3866428-21latency_hist21:45:000
383961999491,42cyclictest0-21swapper/019:10:010
383962199487,21cyclictest3852990-21/usr/sbin/munin20:25:201
383962199481,17cyclictest0-21swapper/100:25:001
3839619994842,3cyclictest0-21swapper/019:15:010
3839625994740,4cyclictest3859549-21munin-plugin-st21:05:012
3839625994729,12cyclictest0-21swapper/220:55:192
3839621994734,8cyclictest0-21swapper/123:10:281
3839621994719,17cyclictest24-21ksoftirqd/122:20:011
383961999473,5cyclictest3895288-21munin-run00:35:010
3839619994734,9cyclictest0-21swapper/000:30:010
383961999472,21cyclictest15-21rcuc/023:45:010
3839621994637,5cyclictest3879055-21sendmail23:00:001
3839621994618,11cyclictest0-21swapper/122:25:011
3839621994618,11cyclictest0-21swapper/122:25:011
3839621994614,16cyclictest22-21rcuc/100:35:011
3839619994639,4cyclictest167350irq/118-8000000.ethernet-tx019:15:270
3839619994632,9cyclictest1283-21cron23:10:000
3839619994630,13cyclictest3871002-21lsblk22:10:210
383961999461,9cyclictest3863276-21fschecks_time21:25:210
3839621994529,9cyclictest0-21swapper/123:55:011
3839621994529,9cyclictest0-21swapper/123:55:011
383962199451,10cyclictest0-21swapper/120:10:011
383962199451,10cyclictest0-21swapper/120:10:011
3839619994538,4cyclictest20650irq/252-8000000.ethernet22:25:170
3839619994538,4cyclictest20650irq/252-8000000.ethernet22:25:170
3839619994537,4cyclictest167350irq/118-8000000.ethernet-tx022:15:160
3839619994535,5cyclictest20850irq/208-8000000.ethernet19:25:190
383961999451,41cyclictest0-21swapper/022:35:000
3839625994436,5cyclictest3845002-21munin-plugin-st19:40:002
3839621994435,4cyclictest0-21swapper/122:55:011
3839621994434,5cyclictest3891807-21munin-plugin-st00:15:011
3839621994433,6cyclictest3884206-21cron23:30:011
3839619994437,4cyclictest167350irq/118-8000000.ethernet-tx019:45:220
3839619994436,4cyclictest167350irq/118-8000000.ethernet-tx023:15:180
3839625994328,9cyclictest3892655-21sendmail00:20:002
3839621994330,7cyclictest3884988-21grep23:30:281
3839621994329,6cyclictest0-21swapper/123:15:281
3839621994328,8cyclictest3874771-21grep22:30:301
3839621994323,10cyclictest0-21swapper/119:50:261
3839621994310,12cyclictest24-21ksoftirqd/119:35:021
3839619994335,4cyclictest167350irq/118-8000000.ethernet-tx023:25:270
3839619994324,17cyclictest0-21swapper/023:20:240
383961999431,3cyclictest0-21swapper/020:20:010
383961999431,14cyclictest0-21swapper/021:55:010
3839625994230,8cyclictest0-21swapper/219:25:002
3839621994229,7cyclictest3877302-21grep22:45:301
383961999426,19cyclictest3887789-21/usr/sbin/munin23:50:170
383961999426,19cyclictest3887789-21/usr/sbin/munin23:50:170
3839619994236,4cyclictest20650irq/252-8000000.ethernet20:40:130
3839619994235,4cyclictest167350irq/118-8000000.ethernet-tx021:55:270
3839619994233,5cyclictest167350irq/118-8000000.ethernet-tx000:20:000
3839619994232,8cyclictest0-21swapper/019:55:000
383962599416,9cyclictest3840552-21munin-node19:15:012
3839625994129,8cyclictest0-21swapper/223:30:272
3839625994127,9cyclictest0-21swapper/223:10:202
3839621994130,5cyclictest0-21swapper/121:40:001
3839621994122,10cyclictest0-21swapper/121:05:011
3839619994134,5cyclictest3858694-21munin-plugin-st21:00:000
383961999411,4cyclictest0-21swapper/000:35:200
383961999411,38cyclictest0-21swapper/022:05:200
383961999411,38cyclictest0-21swapper/021:00:190
383961999411,37cyclictest3860680-21fschecks_count21:10:200
3839619994112,25cyclictest0-21swapper/022:45:200
3839625994032,4cyclictest3883228-21unixbench_singl23:20:302
3839625994028,8cyclictest0-21swapper/200:20:262
3839625994027,8cyclictest0-21swapper/221:10:292
3839625994024,10cyclictest0-21swapper/219:25:282
3839621994031,6cyclictest231ktimers/122:40:201
3839621994031,6cyclictest231ktimers/100:00:111
3839621994030,5cyclictest0-21swapper/122:35:301
3839621994027,7cyclictest0-21swapper/121:50:301
3839621994027,6cyclictest0-21swapper/120:05:021
3839621994021,12cyclictest0-21swapper/100:30:011
3839621994021,11cyclictest0-21swapper/121:40:281
3839619994034,4cyclictest20850irq/208-8000000.ethernet22:40:000
3839619994034,3cyclictest3885113-21sed23:35:000
3839619994024,14cyclictest0-21swapper/020:30:000
383961999401,3cyclictest3854741-21diskstats20:35:170
383961999401,2cyclictest0-21swapper/021:45:010
3839625993925,9cyclictest0-21swapper/200:30:292
3839621993929,6cyclictest0-21swapper/119:25:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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