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2025-11-16 - 00:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack7slot3s.osadl.org (updated Sat Nov 15, 2025 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1526621800,5sleep11082399cyclictest07:20:331
1526621800,5sleep11082399cyclictest07:20:331
2165721220,1sleep00-21swapper/009:55:580
89942930,3sleep00-21swapper/008:35:030
177562930,2sleep10-21swapper/111:24:061
243222800,5sleep21082499cyclictest10:00:262
201612800,5sleep11082399cyclictest10:40:311
95442760,5sleep31082599cyclictest09:40:033
74462730,2sleep20-21swapper/208:30:182
1082399724,58cyclictest7750irq/56-dwc_otg07:40:211
1082399721,52cyclictest7950irq/56-dwc_otg_08:01:321
10823997118,40cyclictest32760-21latency09:25:251
145472700,1sleep10-21swapper/110:33:021
1082399702,52cyclictest0-21swapper/107:45:181
55552690,3sleep20-21swapper/211:52:092
10823996910,42cyclictest7950irq/56-dwc_otg_07:40:021
57432680,2sleep20-21swapper/209:33:462
160912680,1sleep30-21swapper/312:07:163
1082399681,48cyclictest27177-21grep10:50:281
1082299673,16cyclictest23366-21ssh09:10:330
1082399669,39cyclictest31817-21sed10:10:361
1082399662,45cyclictest0-21swapper/110:27:401
1082399661,56cyclictest7913-21/usr/sbin/munin11:10:331
1082299656,40cyclictest0-21swapper/010:40:170
1082299656,40cyclictest0-21swapper/007:55:150
1082299656,40cyclictest0-21swapper/007:55:150
1082399643,36cyclictest5588-21diskstats10:20:221
1082299641,48cyclictest13273-21/usr/sbin/munin09:45:260
1082299641,48cyclictest13273-21/usr/sbin/munin09:45:260
1082399637,42cyclictest7950irq/56-dwc_otg_09:45:041
1082399632,51cyclictest4339-21sh12:32:311
1082399631,43cyclictest29855-21timerwakeupswit09:20:321
1082299626,10cyclictest0-21swapper/009:35:140
10822996230,15cyclictest7850irq/56-dwc_otg_11:55:200
1082399618,34cyclictest0-21swapper/111:03:231
1082399616,43cyclictest7950irq/56-dwc_otg_10:38:431
1082399615,40cyclictest7950irq/56-dwc_otg_09:37:201
1082399611,5cyclictest26857-21ssh10:04:541
10823996111,28cyclictest0-21swapper/112:05:151
1082299615,39cyclictest0-21swapper/011:45:150
1082299612,46cyclictest0-21swapper/009:10:020
1082299611,43cyclictest6625-21interrupts12:35:270
1082399604,37cyclictest7950irq/56-dwc_otg_11:30:081
1082399604,37cyclictest7950irq/56-dwc_otg_11:30:081
1082399603,47cyclictest7950irq/56-dwc_otg_11:50:271
1082399603,35cyclictest25771-21chrt11:35:261
1082399602,40cyclictest7950irq/56-dwc_otg_11:07:211
10823996019,38cyclictest23593-21rm12:16:011
10822996031,16cyclictest0-21swapper/010:50:190
1082299602,47cyclictest0-21swapper/012:25:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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