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2026-07-24 - 06:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
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 rack7slot4s.osadl.org (updated Fri Jul 24, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13037996510,9cyclictest131rcu_preempt20:20:110
13037996420,34cyclictest131rcu_preempt20:50:120
1305499618,16cyclictest27-21ksoftirqd/200:20:122
1303799597,5cyclictest131rcu_preempt21:35:130
1304599561,46cyclictest3858-21ssh23:00:151
1304599551,41cyclictest17215-21ssh21:20:161
13067995345,5cyclictest35966irq/58-eth022:05:123
13045995213,31cyclictest21-21ksoftirqd/119:30:111
1303799521,45cyclictest24377-21ssh00:05:160
1306799502,28cyclictest35966irq/58-eth022:30:133
1306799502,28cyclictest35966irq/58-eth022:30:123
1305499502,36cyclictest28161-21ssh00:25:132
13037994830,9cyclictest12-21ksoftirqd/022:20:140
1303799481,9cyclictest131rcu_preempt22:40:140
1305499463,37cyclictest31564-21ssh21:10:142
1304599461,32cyclictest16778-21ssh23:25:131
1306799443,27cyclictest35966irq/58-eth022:00:123
1303799423,26cyclictest12985-21ssh23:05:150
1306799393,21cyclictest35966irq/58-eth021:15:163
1305499382,18cyclictest2554-21switchtime23:15:272
1305499382,18cyclictest2554-21switchtime23:15:262
1304599383,23cyclictest24789-21sh22:00:131
13067993721,11cyclictest35966irq/58-eth021:30:113
1305499372,18cyclictest11720-21ntp_192.168.11421:15:262
1303799375,25cyclictest12-21ksoftirqd/019:45:120
1303799375,15cyclictest12-21ksoftirqd/019:20:150
1304599363,22cyclictest31076-21ssh23:15:131
1304599363,22cyclictest31076-21ssh23:15:121
1304599361,29cyclictest28149-21apt-get00:25:121
1304599361,28cyclictest11573-21ssh23:40:141
1303799364,27cyclictest10453-21ssh22:10:120
1305499353,26cyclictest0-21swapper/221:32:022
1305499352,26cyclictest10082-21ssh00:15:162
1304599352,5cyclictest131rcu_preempt22:15:131
1305499349,19cyclictest27-21ksoftirqd/221:25:142
13067993322,8cyclictest35966irq/58-eth000:15:263
1305499332,25cyclictest6718-21ssh21:50:152
1304599331,23cyclictest0-21swapper/119:15:141
1306799327,15cyclictest35966irq/58-eth021:35:123
13067993216,9cyclictest35966irq/58-eth022:35:123
1305499322,19cyclictest10477-21ssh22:10:132
1305499315,17cyclictest27346irq/40-dwc2_hso22:20:142
1304599312,22cyclictest9099-21ssh22:45:141
13045993121,4cyclictest0-21swapper/121:50:141
13037993117,11cyclictest31357-21kworker/u8:022:05:130
1305499304,15cyclictest27346irq/40-dwc2_hso20:35:112
1305499303,19cyclictest0-21swapper/221:35:122
1305499303,18cyclictest27346irq/40-dwc2_hso21:40:142
1305499302,21cyclictest0-21swapper/220:30:132
1305499302,16cyclictest14446-21ssh22:30:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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