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2026-07-03 - 00:24

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 Thu Jul 02, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
411826299802,29cyclictest30-21rcuc/207:35:012
411826199771,38cyclictest0-21swapper/112:30:011
411826199771,38cyclictest0-21swapper/112:30:011
411826199696,22cyclictest4150267-21gpg-connect-age10:15:011
411826199693,22cyclictest22-21rcuc/111:10:011
4118258996813,48cyclictest0-21swapper/012:05:110
4118261996535,18cyclictest0-21swapper/109:05:011
411825899628,45cyclictest0-21swapper/009:05:270
4118258995950,5cyclictest0-21swapper/011:50:200
4118258995949,5cyclictest167350irq/118-8000000.ethernet-tx007:10:300
4118258995911,44cyclictest12-21ksoftirqd/007:10:010
411826199576,32cyclictest22-21rcuc/109:45:201
411826199576,32cyclictest22-21rcuc/109:45:201
4118261995615,12cyclictest4121046-21apt-get07:25:011
4118258995643,9cyclictest4149264-21munin-plugin-st10:10:010
4118258995520,6cyclictest4161160-21cron11:20:000
4118258995510,42cyclictest4122494-21phc2sys07:30:250
4118258995448,4cyclictest0-21swapper/009:10:110
4118258995448,4cyclictest0-21swapper/009:10:110
4118258995344,4cyclictest167350irq/118-8000000.ethernet-tx012:15:150
4118258995312,36cyclictest4162760-21grep11:25:270
4118258995242,6cyclictest167350irq/118-8000000.ethernet-tx012:00:000
4118262995145,3cyclictest311ktimers/210:35:032
4118262995130,14cyclictest311ktimers/208:20:122
4118262995129,15cyclictest311ktimers/207:10:112
411825899516,35cyclictest4150323-21latency_hist10:15:020
4118258995144,4cyclictest167350irq/118-8000000.ethernet-tx010:20:280
4118258995143,4cyclictest167350irq/118-8000000.ethernet-tx008:20:170
4118258995122,27cyclictest4142589-21/usr/sbin/munin09:30:170
4118261995036,9cyclictest0-21swapper/110:45:011
4118261995036,9cyclictest0-21swapper/110:45:001
4118258994934,10cyclictest0-21swapper/007:25:300
4118258994920,26cyclictest4158306-21/usr/sbin/munin11:00:240
4118261994835,9cyclictest0-21swapper/108:35:001
4118261994835,9cyclictest0-21swapper/108:35:001
411826199483,15cyclictest22-21rcuc/107:15:001
4118261994810,29cyclictest0-21swapper/108:45:261
411825899488,36cyclictest0-21swapper/009:50:100
4118258994814,7cyclictest0-21swapper/009:30:010
4118262994733,10cyclictest311ktimers/208:45:112
411825899474,3cyclictest4131998-21grep08:25:290
4118258994730,15cyclictest167350irq/118-8000000.ethernet-tx010:15:180
4118258994726,17cyclictest4163318-21awk11:30:210
4118258994721,19cyclictest20650irq/252-8000000.ethernet09:55:010
4118261994637,5cyclictest4167192-21apt-key11:55:011
4118261994633,9cyclictest0-21swapper/112:10:271
411825899467,34cyclictest0-21swapper/011:45:000
4118258994639,4cyclictest167350irq/118-8000000.ethernet-tx010:30:150
4118258994637,4cyclictest0-21swapper/008:40:000
4118258994636,7cyclictest4138034-21grep09:00:290
411825899462,40cyclictest4170316-21grep12:10:260
4118258994610,34cyclictest4120622-21/usr/sbin/munin07:20:220
4118258994529,12cyclictest0-21swapper/009:20:250
4118258994528,12cyclictest0-21swapper/010:25:190
411825899450,42cyclictest4135187-21interrupts08:45:220
4118262994424,12cyclictest311ktimers/207:15:112
411826199441,35cyclictest0-21swapper/112:15:211
411825899446,33cyclictest4126440-21latency_hist07:55:010
411825899441,7cyclictest0-21swapper/008:00:260
4118262994330,9cyclictest0-21swapper/208:15:002
4118262994328,10cyclictest0-21swapper/209:25:002
4118262994323,3cyclictest4138096-21kthreadd09:02:192
4118261994334,6cyclictest4120192-21cat07:20:011
4118258994335,4cyclictest20850irq/208-8000000.ethernet12:35:190
4118258994326,13cyclictest0-21swapper/010:50:310
411825899431,7cyclictest0-21swapper/008:50:200
411825899431,40cyclictest0-21swapper/009:45:270
411825899431,40cyclictest0-21swapper/009:45:270
411825899431,3cyclictest0-21swapper/010:45:010
411825899431,3cyclictest0-21swapper/010:45:010
4118262994232,5cyclictest0-21swapper/208:00:002
4118262994228,10cyclictest0-21swapper/210:25:282
4118262994227,11cyclictest311ktimers/210:50:152
4118262994216,13cyclictest311ktimers/207:45:112
4118261994231,4cyclictest167450irq/126-8000000.ethernet-tx109:05:221
4118261994228,7cyclictest0-21swapper/109:45:001
4118258994234,4cyclictest20850irq/208-8000000.ethernet07:20:010
4118258994226,11cyclictest0-21swapper/008:30:280
4118258994226,11cyclictest0-21swapper/008:30:280
411825899422,5cyclictest4147961-21perl10:00:190
411825899422,13cyclictest0-21swapper/010:35:190
411825899421,39cyclictest0-21swapper/011:37:440
411825899421,39cyclictest0-21swapper/008:15:000
4118258994213,3cyclictest4157324-21perl10:55:230
411825899421,2cyclictest0-21swapper/009:00:010
4118262994132,4cyclictest0-21swapper/211:00:272
4118262994129,8cyclictest0-21swapper/209:30:282
4118262994129,8cyclictest0-21swapper/207:40:292
411826199419,10cyclictest14-21rcu_preempt11:40:021
4118261994130,6cyclictest0-21swapper/110:30:281
411825899418,28cyclictest4144208-21latency_hist09:40:010
4118258994134,3cyclictest4159372-21unixbench_multi11:05:270
4118258994133,5cyclictest0-21swapper/009:40:200
4118258994110,27cyclictest4134166-21diskstats08:40:190
4118262994027,8cyclictest0-21swapper/208:30:272
4118262994027,8cyclictest0-21swapper/208:30:262
4118261994031,5cyclictest4163703-21munin-plugin-st11:35:001
4118261994011,24cyclictest231ktimers/111:20:281
4118261994011,24cyclictest231ktimers/111:20:271
4118258994032,5cyclictest0-21swapper/011:10:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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