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2026-06-12 - 14:55

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 Fri Jun 12, 2026 12:45:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
783299474,29cyclictest35966irq/58-eth011:05:103
783299454,27cyclictest35966irq/58-eth010:45:123
783299433,26cyclictest35966irq/58-eth009:15:153
783299432,23cyclictest35966irq/58-eth007:25:143
782499426,28cyclictest898-21ssh11:20:132
7816994117,19cyclictest21-21ksoftirqd/111:35:121
7816994117,19cyclictest21-21ksoftirqd/111:35:121
780199414,2cyclictest131rcu_preempt08:30:130
7801994135,3cyclictest25794-21diskmemload09:45:140
782499401,31cyclictest29126-21ssh12:30:112
783299392,18cyclictest35966irq/58-eth010:10:133
783299391,23cyclictest35966irq/58-eth009:30:123
780199383,32cyclictest11288-21ssh12:20:130
783299373,19cyclictest35966irq/58-eth009:55:123
783299372,22cyclictest35966irq/58-eth012:25:113
781699370,30cyclictest0-21swapper/109:15:151
780199361,31cyclictest20211-21ssh12:25:130
780199360,3cyclictest131rcu_preempt12:35:250
783299342,21cyclictest35966irq/58-eth008:30:143
783299341,18cyclictest35966irq/58-eth010:40:113
782499343,17cyclictest26176-21ssh09:10:122
780199342,29cyclictest22423-21ssh11:50:130
783299332,20cyclictest35966irq/58-eth012:35:133
7816993324,2cyclictest536-21usb-storage10:10:121
783299322,16cyclictest35966irq/58-eth011:00:143
780199321,4cyclictest7979-21apt-get07:10:120
780199321,4cyclictest7979-21apt-get07:10:110
780199321,3cyclictest131rcu_preempt09:40:130
783299313,22cyclictest35966irq/58-eth011:20:133
783299311,19cyclictest35966irq/58-eth010:20:123
7824993117,4cyclictest25794-21diskmemload09:40:142
7824993111,12cyclictest13171-21kworker/u8:010:50:132
781699312,22cyclictest31903-21ssh10:41:261
781699311,19cyclictest18777-21ssh11:30:121
780199314,23cyclictest17299-21ssh10:35:120
780199311,26cyclictest26187-21ssh09:10:120
7801993110,3cyclictest131rcu_preempt11:10:140
783299301,15cyclictest35966irq/58-eth010:50:113
782499308,13cyclictest27-21ksoftirqd/211:45:272
782499303,19cyclictest0-21swapper/212:25:132
782499302,24cyclictest24351-21ssh11:15:112
781699308,16cyclictest131rcu_preempt12:20:141
781699302,22cyclictest24424-21awk10:55:261
781699302,22cyclictest1045-21/usr/sbin/munin11:00:261
780199308,4cyclictest131rcu_preempt09:55:130
780199307,4cyclictest131rcu_preempt12:30:140
780199302,7cyclictest12-21ksoftirqd/008:50:130
783299293,18cyclictest35966irq/58-eth009:10:123
783299293,17cyclictest35966irq/58-eth009:35:113
7824992910,13cyclictest0-21swapper/210:09:422
781699291,22cyclictest28096-21ssh10:05:131
780199297,17cyclictest13401-21ssh11:45:120
780199292,25cyclictest8013-21ssh12:00:140
780199292,25cyclictest8013-21ssh12:00:130
780199292,20cyclictest6404-21ssh09:35:110
782499285,3cyclictest131rcu_preempt11:00:242
782499284,16cyclictest27346irq/40-dwc2_hso10:40:122
782499284,11cyclictest27-21ksoftirqd/210:03:532
782499282,19cyclictest27346irq/40-dwc2_hso10:55:132
7824992810,5cyclictest0-21swapper/212:21:152
7824992810,12cyclictest0-21swapper/212:35:322
780199284,4cyclictest12-21ksoftirqd/010:20:100
780199281,23cyclictest20768-21ssh10:55:150
780199281,21cyclictest0-21swapper/011:20:130
7801992810,3cyclictest131rcu_preempt09:24:070
783299274,16cyclictest35966irq/58-eth008:20:133
783299274,12cyclictest35966irq/58-eth011:25:113
782499278,3cyclictest131rcu_preempt12:00:042
782499278,3cyclictest131rcu_preempt12:00:032
782499272,9cyclictest27-21ksoftirqd/208:45:122
7824992712,12cyclictest27-21ksoftirqd/211:05:162
7824992710,4cyclictest27-21ksoftirqd/207:30:172
781699276,14cyclictest131rcu_preempt07:35:141
781699276,14cyclictest131rcu_preempt07:35:131
7816992714,4cyclictest131rcu_preempt10:45:201
7816992713,11cyclictest3530-21kworker/1:211:05:111
7816992712,4cyclictest21-21ksoftirqd/112:05:231
780199277,3cyclictest131rcu_preempt11:25:330
780199276,2cyclictest131rcu_preempt11:15:100
7801992712,4cyclictest0-21swapper/010:12:110
7801992711,7cyclictest12-21ksoftirqd/012:16:500
782499264,7cyclictest131rcu_preempt12:11:202
782499264,14cyclictest27346irq/40-dwc2_hso07:15:132
782499262,11cyclictest0-21swapper/208:10:162
7824992616,8cyclictest27-21ksoftirqd/208:29:182
782499261,21cyclictest10160-21cut09:55:162
7824992611,7cyclictest27-21ksoftirqd/208:20:262
780199267,3cyclictest131rcu_preempt11:35:320
780199267,3cyclictest131rcu_preempt11:35:320
780199266,9cyclictest131rcu_preempt07:45:190
780199262,5cyclictest12-21ksoftirqd/008:05:140
780199261,7cyclictest12-21ksoftirqd/009:15:130
7801992614,8cyclictest0-21swapper/010:40:120
780199261,20cyclictest29883-21ssh09:30:140
783299259,8cyclictest0-21swapper/308:00:123
783299253,13cyclictest0-21swapper/309:25:053
782499259,13cyclictest27-21ksoftirqd/210:25:322
782499258,4cyclictest27-21ksoftirqd/210:38:282
782499258,3cyclictest0-21swapper/209:28:412
782499257,7cyclictest131rcu_preempt09:20:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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