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2026-05-10 - 21:34

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 100 highest latencies:
System rack7slot4s.osadl.org (updated Sun May 10, 2026 12:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15682996040,16cyclictest0-21swapper/311:20:123
1565399571,41cyclictest11523-21ssh11:20:110
1567499526,20cyclictest27-21ksoftirqd/208:55:142
1567499512,25cyclictest9067-21ssh10:25:132
1566699492,35cyclictest2005-21ssh09:10:111
1567499469,25cyclictest0-21swapper/209:30:132
15666994611,10cyclictest21-21ksoftirqd/109:25:131
1567499443,33cyclictest18147-21ssh10:30:152
1566699422,37cyclictest6135-21ssh11:35:141
1566699422,36cyclictest31676-21ssh12:25:111
1566699422,35cyclictest22693-21ssh12:20:131
1568299413,26cyclictest35966irq/58-eth011:15:133
15674994131,5cyclictest14120-21sh10:10:142
1566699411,18cyclictest24239-21ssh11:45:151
1568299402,26cyclictest35966irq/58-eth012:05:123
1566699402,31cyclictest17351-21ssh12:35:131
1565399402,30cyclictest4997-21ssh10:05:130
1568299393,22cyclictest35966irq/58-eth007:40:123
1566699392,33cyclictest898-21sh11:50:121
1566699392,32cyclictest15207-21ssh09:35:141
1566699391,4cyclictest131rcu_preempt12:05:111
1568299382,24cyclictest35966irq/58-eth008:05:123
1566699381,33cyclictest28285-21ssh10:00:121
1565399383,29cyclictest9933-21ssh11:55:120
1567499371,27cyclictest31087-21ssh10:55:142
1567499370,26cyclictest0-21swapper/211:45:142
1568299365,20cyclictest35966irq/58-eth011:35:143
1567499362,28cyclictest19242-21ssh09:55:142
1566699362,24cyclictest951-21ssh09:45:121
1566699361,26cyclictest25895-21ssh11:10:121
1566699361,26cyclictest25895-21ssh11:10:121
1566699361,25cyclictest27213-21rm10:35:151
1565399363,19cyclictest0-21swapper/009:45:120
1568299352,19cyclictest35966irq/58-eth011:45:133
15682993514,11cyclictest35966irq/58-eth008:40:123
1566699357,22cyclictest21-21ksoftirqd/107:25:131
1566699354,26cyclictest13623-21ssh12:15:131
1566699352,29cyclictest32412-21ssh10:20:121
1566699351,28cyclictest18943-21ssh12:00:101
1565399356,18cyclictest0-21swapper/010:25:130
1568299342,23cyclictest35966irq/58-eth007:45:123
1568299342,22cyclictest35966irq/58-eth009:55:143
1568299341,20cyclictest35966irq/58-eth011:05:143
1567499344,21cyclictest17322-21ssh12:35:122
1566699343,23cyclictest6097-21ssh09:30:131
15666993415,16cyclictest21-21ksoftirqd/110:45:121
1568299337,19cyclictest35966irq/58-eth010:35:143
1567499333,17cyclictest9942-21ssh11:55:132
15674993316,11cyclictest27-21ksoftirqd/211:50:132
1568299326,15cyclictest35966irq/58-eth009:20:133
1567499329,12cyclictest27-21ksoftirqd/212:25:142
15682993116,10cyclictest35966irq/58-eth012:15:123
15682993114,11cyclictest35966irq/58-eth009:45:123
1568299311,17cyclictest35966irq/58-eth010:55:163
1567499314,17cyclictest27346irq/40-dwc2_hso08:25:142
1567499314,17cyclictest27346irq/40-dwc2_hso08:25:142
1567499314,15cyclictest27346irq/40-dwc2_hso12:15:132
1566699318,16cyclictest21-21ksoftirqd/108:30:131
1567499309,15cyclictest6150-21ssh11:35:142
1567499305,18cyclictest20325-21ssh09:20:152
1567499304,19cyclictest27346irq/40-dwc2_hso08:15:142
1567499304,17cyclictest27346irq/40-dwc2_hso10:15:132
1567499302,8cyclictest28309-21ssh10:00:132
1566699301,2cyclictest0-21swapper/109:20:131
1568299292,16cyclictest35966irq/58-eth008:45:123
15682992918,7cyclictest0-21swapper/310:05:133
15682992914,8cyclictest35966irq/58-eth010:00:133
1567499296,13cyclictest27346irq/40-dwc2_hso08:40:122
1567499291,16cyclictest27231-21ssh10:35:152
15653992922,4cyclictest17176-21apt-get07:45:130
15653992914,10cyclictest24331-21apt-get09:40:140
15653992914,10cyclictest24331-21apt-get09:40:130
15653992913,12cyclictest6072-21apt-get09:30:130
1568299286,13cyclictest35966irq/58-eth011:10:133
1568299286,13cyclictest35966irq/58-eth011:10:123
15682992813,9cyclictest35966irq/58-eth011:30:253
1567499282,20cyclictest0-21swapper/207:20:132
1567499282,16cyclictest27346irq/40-dwc2_hso07:40:112
1567499282,11cyclictest0-21swapper/208:20:142
1567499281,19cyclictest2796-21cut07:30:152
15653992822,3cyclictest15039-21apt-get08:50:120
15653992822,3cyclictest15039-21apt-get08:50:120
1565399281,23cyclictest31086-21ssh10:55:140
1565399281,19cyclictest11200-21ssh09:15:130
1568299272,15cyclictest0-21swapper/311:55:133
1568299271,14cyclictest35966irq/58-eth008:10:123
1568299270,17cyclictest35966irq/58-eth012:20:123
1567499275,19cyclictest27346irq/40-dwc2_hso11:30:132
1567499272,15cyclictest4601-21ssh12:10:112
1566699272,19cyclictest21908-21ssh10:50:111
15653992713,10cyclictest620-21apt-get08:35:140
1567499263,15cyclictest27346irq/40-dwc2_hso10:40:132
1566699263,18cyclictest29604-21ssh11:30:141
1566699261,18cyclictest11199-21sh09:15:131
1565399262,15cyclictest2533-21ssh11:15:140
15653992615,9cyclictest27230-21ssh10:35:150
15653992615,7cyclictest0-21swapper/008:45:120
1568299252,17cyclictest0-21swapper/310:30:143
1568299252,15cyclictest0-21swapper/311:40:153
1568299252,15cyclictest0-21swapper/310:15:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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