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2026-04-13 - 04:47

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 Mon Apr 13, 2026 00:45:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2311899716,47cyclictest23690-21ssh00:00:131
2311899616,8cyclictest131rcu_preempt00:30:141
2312699603,46cyclictest14700-21ssh23:55:122
2311099597,45cyclictest29431-21ssh22:15:130
2311099545,40cyclictest21343-21ssh00:35:120
2311099536,37cyclictest2423-21ssh22:00:110
23131995219,18cyclictest28366irq/58-eth021:35:143
2312699521,4cyclictest0-21swapper/221:35:142
2312699521,4cyclictest0-21swapper/219:15:132
2312699521,4cyclictest0-21swapper/219:15:132
2311899513,38cyclictest27679-21ssh22:50:141
2312699506,41cyclictest2391-21ssh23:30:142
2312699492,35cyclictest0-21swapper/222:00:122
2312699482,4cyclictest0-21swapper/219:20:112
2311099473,35cyclictest5993-21ssh22:20:130
2311899463,29cyclictest29268-21ssh23:45:131
2312699441,25cyclictest4029-21ssh21:25:132
2311899443,38cyclictest32690-21ssh00:05:131
2311099431,31cyclictest4293-21ssh22:55:140
2311899422,8cyclictest131rcu_preempt21:55:131
2311899422,8cyclictest131rcu_preempt21:55:131
23131994019,14cyclictest28366irq/58-eth023:20:123
2312699392,19cyclictest11608-21cut19:30:182
2312699392,17cyclictest23919-21kernelversion19:10:182
2312699391,8cyclictest26976-21latency_hist20:55:022
2311899392,26cyclictest22253-21ssh21:35:141
23118993920,14cyclictest0-21swapper/120:40:121
2311099391,26cyclictest9654-21ssh22:40:140
2312699377,2cyclictest0-21swapper/220:15:162
2312699376,5cyclictest22467-21run-parts22:45:282
2312699371,9cyclictest7425-21sh21:45:022
2312699371,9cyclictest26548-21kthreadcore19:45:222
2312699371,9cyclictest16202-21mailstats20:40:272
2312699371,8cyclictest8498-21cut20:35:202
2312699371,14cyclictest16393-21cron23:20:012
2311899371,30cyclictest20251-21rm23:40:141
2311899371,30cyclictest20251-21rm23:40:141
23131993616,12cyclictest33-21ksoftirqd/300:30:143
2312699361,9cyclictest17017-21grep21:50:172
2312699361,8cyclictest12388-21/usr/sbin/munin00:30:152
2312699361,12cyclictest9976-21ssh00:10:192
2311899361,2cyclictest131rcu_preempt22:55:131
2312699354,28cyclictest0-21swapper/222:20:282
2312699353,23cyclictest0-21swapper/222:30:192
2312699352,17cyclictest29701-21irqcore19:50:182
2312699351,8cyclictest902-21grep22:35:172
2312699351,8cyclictest902-21grep22:35:172
2312699351,6cyclictest4264-21apt-get22:55:132
2312699351,10cyclictest12346-21kthreadcore23:35:182
2312699350,9cyclictest4174-21timerandwakeup00:05:282
2312699350,7cyclictest20244-21ssh23:40:132
2312699350,7cyclictest20244-21ssh23:40:122
2311099352,24cyclictest18118-21ssh00:15:130
2311099351,10cyclictest12-21ksoftirqd/022:45:120
2312699343,8cyclictest0-21swapper/221:31:192
2312699342,28cyclictest23706-21sh00:00:152
2312699342,10cyclictest22346irq/40-dwc2_hso21:05:142
2312699342,10cyclictest22346irq/40-dwc2_hso21:05:132
2312699341,9cyclictest9837-21sed23:50:312
2312699341,8cyclictest30658-21kthreadcore22:50:242
2312699341,8cyclictest24588-21kthreadcore23:05:222
2312699341,8cyclictest20628-21awk23:20:282
2312699341,8cyclictest17152-21cut20:10:192
2312699341,8cyclictest16042-21latency_hist20:10:012
2312699341,3cyclictest0-21swapper/222:15:092
23126993410,21cyclictest10210-21find20:00:282
23126993410,21cyclictest10210-21find20:00:272
2311899344,20cyclictest7777-21ssh21:45:141
2311899342,23cyclictest28131-21ssh21:20:191
2311899341,24cyclictest0-21swapper/119:10:141
2311099342,23cyclictest28138-21uname21:20:200
2311099341,27cyclictest18319-21sh21:15:150
2313199339,16cyclictest28366irq/58-eth000:25:133
2312699334,6cyclictest11642-21fschecks_time22:05:162
2312699331,9cyclictest27442-21wc21:20:152
2312699331,9cyclictest22774-21kthreadcore22:10:212
2312699331,9cyclictest12984-21kthreadcore22:40:242
2312699331,9cyclictest0-21swapper/219:35:172
2312699331,13cyclictest4391-21kthreadcore20:30:222
2312699331,10cyclictest8819-21diskmemload00:20:272
2312699331,10cyclictest8819-21diskmemload00:20:272
2311899332,24cyclictest11436-21ssh22:05:141
2312699324,7cyclictest31293-21sh23:10:142
2312699322,9cyclictest18273-21kthreadcore20:45:192
2312699321,9cyclictest0-21swapper/200:28:412
2312699321,7cyclictest9007-21xargs19:25:262
2311899322,23cyclictest3108-21grep19:55:191
23110993212,10cyclictest23098-21cyclictest23:25:120
2312699311,9cyclictest1987-21idleruntime-cro23:30:012
2312699311,9cyclictest12778-21ssh21:45:402
2312699311,8cyclictest19796-21kthreadcore21:15:212
2312699310,9cyclictest30841-21grep20:55:282
2312699310,10cyclictest24058-21ssh00:16:512
2311899312,21cyclictest22331-21cut19:40:191
2311899312,20cyclictest7879-21ssh23:15:161
2311099312,20cyclictest22332-21tr19:40:190
2313199301,12cyclictest28366irq/58-eth022:10:123
2312699301,9cyclictest5377-21ssh23:50:002
2312699301,9cyclictest0-21swapper/220:25:182
2312699301,9cyclictest0-21swapper/220:25:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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