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2026-04-22 - 00:36

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 Tue Apr 21, 2026 12:45:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1708999552,40cyclictest28407-21ssh10:00:121
1708599511,40cyclictest12174-21ssh09:15:140
1708999502,36cyclictest16588-21ssh12:00:121
1708599501,40cyclictest1339-21ssh09:45:120
17105994829,12cyclictest35966irq/58-eth012:15:133
17105994829,12cyclictest35966irq/58-eth012:15:123
1708599463,5cyclictest131rcu_preempt11:50:140
17098994516,24cyclictest3115-21diskmemload10:40:142
1708999452,6cyclictest131rcu_preempt08:10:121
17098994424,9cyclictest27-21ksoftirqd/211:00:112
1709899442,33cyclictest13318-21ssh11:40:112
1709899435,26cyclictest27-21ksoftirqd/209:05:132
1708999438,8cyclictest21-21ksoftirqd/112:20:141
1709899412,15cyclictest27-21ksoftirqd/207:50:132
17098994110,13cyclictest27-21ksoftirqd/211:05:142
1708999414,29cyclictest31210-21ssh11:50:141
1708999412,28cyclictest8515-21ssh10:25:141
17085994120,17cyclictest12-21ksoftirqd/008:20:110
17085994120,17cyclictest12-21ksoftirqd/008:20:110
17105994021,11cyclictest35966irq/58-eth011:10:143
1709899395,23cyclictest261rcuc/211:35:132
1708599392,25cyclictest6536-21sh11:00:120
1710599382,23cyclictest35966irq/58-eth011:30:133
1710599382,22cyclictest35966irq/58-eth009:45:133
1709899385,2cyclictest131rcu_preempt10:00:122
1708999382,28cyclictest12283-21fschecks_time10:45:151
1708999381,26cyclictest26613-21ssh10:35:161
1708999373,14cyclictest19383-21ssh09:55:141
1708999371,10cyclictest6148-21sendmail11:00:011
1710599363,14cyclictest35966irq/58-eth010:30:123
1710599361,22cyclictest35966irq/58-eth010:15:113
1709899362,28cyclictest6633-21ssh10:23:162
1709899362,28cyclictest18335-21ssh09:54:172
1708999362,9cyclictest21989-21kthreadcore10:50:211
1708999362,25cyclictest4410-21ssh11:35:141
1709899354,21cyclictest27-21ksoftirqd/212:15:132
1709899354,21cyclictest27-21ksoftirqd/212:15:122
1708999351,11cyclictest28910-21tr12:05:231
1708999345,5cyclictest29198-21latency_hist08:30:011
1708999341,14cyclictest15576-21ls09:35:021
1710599334,19cyclictest35966irq/58-eth008:00:133
1709899332,18cyclictest27346irq/40-dwc2_hso12:30:152
1709899332,18cyclictest27346irq/40-dwc2_hso12:30:142
17098993316,12cyclictest0-21swapper/210:10:122
1709899331,16cyclictest9777-21ssh09:49:492
1708999334,6cyclictest0-21swapper/111:20:131
1708999334,6cyclictest0-21swapper/111:20:121
1708999333,19cyclictest17500-21ssh10:30:141
1708999333,11cyclictest26773-21ssh11:45:311
17089993325,4cyclictest0-21swapper/111:55:171
1708999331,9cyclictest4628-21kthreadcore12:10:221
1708999331,9cyclictest4628-21kthreadcore12:10:211
1708999331,9cyclictest2642-21kthreadcore08:00:221
1708999331,11cyclictest25692-21cat09:00:011
1708999331,10cyclictest30874-21cut09:25:161
1708999331,10cyclictest27892-21ssh11:30:131
1708599332,23cyclictest3116-21ssh10:40:140
1708999321,9cyclictest22377-21usage_Anybus07:45:291
1708999321,21cyclictest15767-21ssh09:35:131
1708999321,10cyclictest15014-21ssh09:50:301
17085993216,8cyclictest10346-21ssh09:50:130
1710599312,16cyclictest35966irq/58-eth010:20:133
1709899313,17cyclictest27346irq/40-dwc2_hso08:25:142
1709899312,21cyclictest26083-21apt-get10:35:042
1708999317,6cyclictest24745-21tr10:15:191
1708999313,8cyclictest14129-21sh12:35:031
1708999313,8cyclictest14129-21sh12:35:021
1708999312,10cyclictest7612-21kthreadcore10:05:201
1708999312,10cyclictest17781-21kthreadcore08:15:221
1708999311,9cyclictest5620-21irqcore08:05:181
1708999311,9cyclictest5620-21irqcore08:05:171
1708999311,9cyclictest4064-21kthreadcore09:10:191
1708999311,9cyclictest25575-21kthreadcore09:40:181
1708999311,9cyclictest23128-21wc12:40:011
1708999311,11cyclictest12394-21fschecks_time09:15:161
1708999311,11cyclictest10134-21grep08:40:271
17089993110,4cyclictest0-21swapper/107:55:171
1708999310,10cyclictest17245-21wc07:40:291
1708599315,20cyclictest12-21ksoftirqd/010:25:140
1708599314,18cyclictest10987-21ssh12:15:130
1708599314,18cyclictest10987-21ssh12:15:120
1708599311,24cyclictest23015-21ssh10:15:120
1710599302,14cyclictest36066irq/59-eth011:15:123
1708999302,9cyclictest19691-21kthreadcore11:25:211
1708999301,9cyclictest3344-21find10:20:281
1708999301,9cyclictest27834-21cron07:55:021
1708999301,9cyclictest16208-21kthreadcore10:10:211
1708999301,9cyclictest1461-21diskstats09:45:151
1708999301,7cyclictest17458-21unixbench_singl11:40:301
1708999301,11cyclictest29332-21users11:10:321
1708999301,10cyclictest4681-21kthreadcore10:40:211
1708999301,10cyclictest20273-21ps08:20:171
1708999301,10cyclictest20273-21ps08:20:161
1708999300,11cyclictest28450-21kthreadcore09:00:211
1708599304,21cyclictest151rcuc/010:05:120
17085993012,13cyclictest12-21ksoftirqd/009:59:500
1709899292,20cyclictest0-21swapper/207:55:132
1709899292,16cyclictest27346irq/40-dwc2_hso09:20:122
17098992913,13cyclictest0-21swapper/210:48:162
1708999296,4cyclictest1667-21irqrtprio11:15:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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