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2026-04-02 - 08:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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 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.

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 376 highest latencies:
System rack7slot3s.osadl.org (updated Thu Apr 02, 2026 03:36:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31083997846,7cyclictest7750irq/56-dwc_otg03:05:390
3108399701,23cyclictest505-21rs:main0
3108399661,24cyclictest908-21runrttasks03:19:380
3108399586,15cyclictest0-21swapper/002:50:230
3108399581,4cyclictest10562-21apt-config03:15:140
31083995810,33cyclictest9450irq/48-DMA09:12:250
31083995720,19cyclictest0-21swapper/003:00:200
31083995720,19cyclictest0-21swapper/003:00:200
3108399489,25cyclictest0-21swapper/002:40:190
31094994717,11cyclictest3702-21acpi02:50:202
3108399471,31cyclictest0-21swapper/002:35:340
31094994410,6cyclictest7750irq/56-dwc_otg03:05:392
306432443,12sleep00-21swapper/002:27:550
3109699426,20cyclictest7714-20Xorg03:05:233
3109499427,23cyclictest0-21swapper/203:15:192
3109499418,12cyclictest628-21taskset02:36:432
31089994113,8cyclictest5279-21cron02:55:131
3108399417,23cyclictest0-21swapper/003:22:210
3108399411,37cyclictest0-21swapper/002:46:580
3108399411,26cyclictest0-21swapper/003:27:110
3109699401,27cyclictest0-21swapper/302:30:263
3109499407,12cyclictest0-21swapper/203:11:442
31094994011,11cyclictest0-21swapper/202:44:432
31094994010,12cyclictest12682-21chrt03:22:082
3108999405,26cyclictest8015-20x11perf03:05:201
31089994011,10cyclictest7714-20Xorg03:15:191
31094993923,12cyclictest31121-21apt-get02:30:232
3109499385,20cyclictest7363-21sshd03:01:042
3109499385,20cyclictest7363-21sshd03:01:042
3108999388,7cyclictest23-21ksoftirqd/103:00:351
3108999388,7cyclictest23-21ksoftirqd/103:00:351
3108999386,22cyclictest0-21swapper/102:40:391
31083993818,10cyclictest917-21snmpd02:57:060
3109699371,21cyclictest11727-21ls03:15:363
3109699356,15cyclictest7950irq/56-dwc_otg_02:40:473
3109499359,7cyclictest5710-21sshd02:58:042
3109699343,5cyclictest0-21swapper/302:50:223
31094993410,9cyclictest7950irq/56-dwc_otg_03:30:222
3109699336,14cyclictest0-21swapper/303:00:223
3109699336,14cyclictest0-21swapper/303:00:223
3109699328,5cyclictest8896-1kworker/3:2H02:40:143
31096993213,4cyclictest7714-20Xorg03:15:143
3109499329,13cyclictest0-21swapper/202:47:422
3108999324,4cyclictest7850irq/56-dwc_otg_03:30:131
3108999321,4cyclictest7714-20Xorg03:15:081
308202328,12sleep30-21swapper/302:30:133
3109499302,16cyclictest0-21swapper/203:25:272
3108999302,16cyclictest0-21swapper/102:30:361
3109699295,13cyclictest7950irq/56-dwc_otg_03:35:133
3109699291,18cyclictest0-21swapper/302:46:063
3108999297,15cyclictest3476-21apt02:50:131
125662291,4sleep10-21swapper/103:20:391
3108999284,6cyclictest5898-21latency_hist03:00:141
3109699273,15cyclictest12948-21idleruntime-cro03:25:133
3108999276,13cyclictest23-21ksoftirqd/103:33:221
3108999264,6cyclictest7950irq/56-dwc_otg_02:38:431
304912263,14sleep10-21swapper/102:25:581
291392262,14sleep20-21swapper/202:25:142
3109699242,3cyclictest7950irq/56-dwc_otg_03:30:083
3109699233,12cyclictest7950irq/56-dwc_otg_02:57:063
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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