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2026-04-30 - 17:05

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 all highest latencies:
System rack7slot3s.osadl.org (updated Thu Apr 30, 2026 06:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2349321410,4sleep323502-21tee15:32:043
2199921330,6sleep021996-21expr15:26:280
2199921330,6sleep021996-21expr15:26:280
327469911733,77cyclictest10430-21fstime15:12:270
327469911731,69cyclictest2568-21Run15:22:190
327599911610,82cyclictest13461-21syscall15:26:042
327599911610,82cyclictest13461-21syscall15:26:042
32754991095,10cyclictest12418-21pipe15:18:001
327469910831,56cyclictest12731-21pipe15:20:040
992721070,3sleep19910-21execl15:09:431
228221050,10sleep27950irq/56-dwc_otg_15:01:252
327599910210,71cyclictest12842-21context115:20:422
32754991022,9cyclictest7696-21dhry2reg15:04:151
3275999993,20cyclictest13181-21taskset15:25:412
3275499993,11cyclictest13460-21syscall15:26:041
3275499993,11cyclictest13460-21syscall15:26:041
3275499992,8cyclictest7850irq/56-dwc_otg_15:12:261
32746999824,53cyclictest7884-21taskset15:05:220
32746999715,27cyclictest0-21swapper/015:06:180
79322960,4sleep07818-21sh15:31:120
3275499853,11cyclictest0-21swapper/115:25:431
34112840,4sleep33366-21sh15:03:563
32746998413,53cyclictest2143-21grep15:46:240
119242830,3sleep211939-21wc15:31:272
3275999819,10cyclictest9299-21taskset15:06:182
139422810,3sleep313939-21sh15:28:293
139422810,3sleep313939-21sh15:28:293
3274699808,49cyclictest7362-21sh14:57:520
3275999783,8cyclictest0-21swapper/215:14:542
3274699789,55cyclictest4604-21execl14:40:510
186282770,2sleep20-21swapper/215:00:402
3275999729,20cyclictest4604-21execl14:41:022
32746997111,48cyclictest0-21swapper/014:49:260
32746996811,45cyclictest4604-21execl14:41:080
10302660,3sleep10-21swapper/114:26:131
32746996515,48cyclictest20899-21spawn14:55:240
60852640,2sleep30-21swapper/314:41:333
32763996413,9cyclictest12887-21context115:20:553
32759996421,4cyclictest3744-21aten_rbpower_cu15:51:052
3276399633,10cyclictest25577-21systemd-journal15:18:353
3276399627,9cyclictest10510-21fstime15:13:143
32746996210,37cyclictest0-21swapper/014:32:100
3274699619,39cyclictest6856-21seq15:56:550
3274699599,40cyclictest0-21swapper/015:52:210
3274699574,43cyclictest1324-21runrttasks15:44:300
3276399569,8cyclictest7950irq/56-dwc_otg_15:06:023
32746995510,33cyclictest1786-21taskset14:29:210
48542540,2sleep10-21swapper/114:40:581
3274699546,35cyclictest0-21swapper/016:02:000
320312513,12sleep00-21swapper/014:21:230
3274699502,33cyclictest0-21swapper/015:39:000
3275999472,7cyclictest7850irq/56-dwc_otg_14:26:022
3275999466,5cyclictest32583-21grep15:41:042
3275499432,7cyclictest0-21swapper/114:56:001
323432423,32sleep20-21swapper/214:25:102
3275499416,5cyclictest7950irq/56-dwc_otg_15:31:111
32763994016,4cyclictest1805-31find15:46:183
32763993926,4cyclictest381ktimersoftd/315:51:023
85372380,4sleep2301ktimersoftd/216:01:202
71032380,1sleep30-21swapper/314:50:023
32763993818,6cyclictest6346-21multi.sh14:59:523
76772350,5sleep33276399cyclictest14:51:033
32754993521,8cyclictest0-21swapper/115:46:161
3276399345,6cyclictest7850irq/56-dwc_otg_15:56:133
3275499331,7cyclictest0-21swapper/114:47:561
32754993217,5cyclictest4003-21grep14:36:151
32754993215,12cyclictest320972basename15:40:511
245882320,7sleep231-21ksoftirqd/214:55:002
32763993116,5cyclictest379-21aten_rbpower_en14:26:053
3275999316,15cyclictest0-21swapper/215:55:562
3275999312,4cyclictest0-21swapper/214:47:292
3275499317,4cyclictest7750irq/56-dwc_otg14:51:011
3275499314,6cyclictest9550irq/80-mmc015:55:571
3275499314,18cyclictest7950irq/56-dwc_otg_15:41:151
3275499311,3cyclictest7850irq/56-dwc_otg_15:51:041
3275499306,13cyclictest0-21swapper/114:31:041
3276399296,10cyclictest7950irq/56-dwc_otg_14:35:523
3275999292,6cyclictest7750irq/56-dwc_otg15:40:512
32759992913,5cyclictest908-21runrttasks15:47:582
3276399288,5cyclictest37-21rcuc/314:40:523
3276399285,5cyclictest7909-21cat16:01:113
3276399281,6cyclictest1484-21mv15:45:513
3275999283,5cyclictest0-21swapper/214:35:522
3275999282,18cyclictest0-21swapper/214:36:142
3275499281,16cyclictest7950irq/56-dwc_otg_16:01:121
320692284,15sleep10-21swapper/114:21:411
323772273,15sleep30-21swapper/314:25:353
3276399267,4cyclictest7850irq/56-dwc_otg_15:38:293
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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