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2025-04-03 - 16:02

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 50 highest latencies:
System rack7slot3s.osadl.org (updated Thu Apr 03, 2025 14:22:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89822960,5sleep046-21kworker/0:208:47:500
353921100,3sleep00-21swapper/010:42:030
353921100,3sleep00-21swapper/010:42:030
513121030,2sleep30-21swapper/312:26:443
272372940,2sleep326986-21apt-get11:20:023
272372940,2sleep326986-21apt-get11:20:023
253792940,2sleep30-21swapper/312:09:333
103872890,5sleep3162099cyclictest11:43:493
1617998726,2cyclictest0-21swapper/009:00:130
290612860,2sleep20-21swapper/209:40:212
233322830,5sleep0161799cyclictest10:22:590
161799821,42cyclictest1606-21chrt11:30:460
161799821,42cyclictest1606-21chrt11:30:460
41242810,1sleep10-21swapper/112:25:011
161799801,36cyclictest0-21swapper/012:00:180
1617997925,4cyclictest10545-21aten_rbpower_vo12:35:150
116232790,5sleep0161799cyclictest09:12:540
280962780,4sleep2301ktimersoftd/210:30:292
145132770,5sleep1161899cyclictest12:40:191
161799741,63cyclictest0-21swapper/009:52:280
161799734,33cyclictest0-21swapper/011:40:210
177282720,2sleep30-21swapper/311:56:453
1617997220,19cyclictest7950irq/56-dwc_otg_11:50:070
161799707,16cyclictest0-21swapper/012:15:140
161999683,17cyclictest29440-21latency_hist12:15:012
1617996817,37cyclictest13058-21fschecks_count09:15:170
161799651,60cyclictest20979-21grep12:50:200
216152640,4sleep221618-21grep14:00:342
161799641,23cyclictest0-21swapper/010:50:070
161799641,23cyclictest0-21swapper/010:50:070
271592630,1sleep10-21swapper/112:59:471
271592630,1sleep10-21swapper/112:59:471
291942620,9sleep00-21swapper/010:32:530
1617996126,25cyclictest0-21swapper/011:15:150
1617996126,25cyclictest0-21swapper/011:15:150
161799602,43cyclictest0-21swapper/011:10:590
1617995916,17cyclictest0-21swapper/014:10:130
161799591,47cyclictest18754-21seq11:06:580
274512560,3sleep2301ktimersoftd/209:38:242
161799561,47cyclictest0-21swapper/010:00:230
1617995612,41cyclictest7288-21unixbench_singl13:20:290
1617995611,31cyclictest19147-21latency_hist09:25:010
1617995532,6cyclictest26963-21cat12:10:240
1617995515,31cyclictest22041-21if_eth009:30:210
161799551,41cyclictest20810-21sed10:20:010
1617995430,12cyclictest7073-21cron10:50:000
161799532,41cyclictest0-21swapper/010:06:240
161799532,41cyclictest0-21swapper/010:06:240
1617995321,6cyclictest878-21runrttasks11:47:570
161799531,42cyclictest31467-21cron09:45:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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