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2025-12-30 - 17:58

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 Tue Dec 30, 2025 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3179899836,22cyclictest0-21swapper/009:00:240
271872740,3sleep127186-21grep08:25:321
271872740,3sleep127186-21grep08:25:321
31798996710,22cyclictest0-21swapper/008:10:240
3179899657,35cyclictest16917-21grep09:25:390
3180199621,17cyclictest7950irq/56-dwc_otg_10:10:253
31798995731,4cyclictest0-21swapper/011:35:270
31798995626,28cyclictest101ktimersoftd/007:40:220
3179899552,30cyclictest20461-21sed08:05:430
31798995521,5cyclictest0-21swapper/012:35:210
31798995514,22cyclictest5421-21fschecks_count10:25:300
3179899551,33cyclictest28001-21grep11:25:380
31798995510,25cyclictest25209-21fschecks_count09:50:290
31798995510,25cyclictest25209-21fschecks_count09:50:290
3180099546,20cyclictest7950irq/56-dwc_otg_10:35:172
31798995430,14cyclictest0-21swapper/007:30:100
3179899542,25cyclictest0-21swapper/008:05:100
3180099535,6cyclictest0-21swapper/208:40:232
3179899532,37cyclictest0-21swapper/010:45:230
3179899531,48cyclictest0-21swapper/010:00:240
3180099523,9cyclictest0-21swapper/210:10:242
3179899522,29cyclictest0-21swapper/011:55:290
3179899522,14cyclictest0-21swapper/008:40:110
31798995221,3cyclictest0-21swapper/011:20:100
31798995128,7cyclictest7850irq/56-dwc_otg_09:30:390
31798995121,9cyclictest20602-21grep09:35:390
3179899511,30cyclictest4710-21idleruntime-cro08:55:100
3179899511,28cyclictest0-21swapper/010:30:280
3179899511,28cyclictest0-21swapper/010:30:280
31798995111,4cyclictest473-21unixbench_multi07:10:390
3180099504,19cyclictest7950irq/56-dwc_otg_09:10:362
3180099501,8cyclictest7850irq/56-dwc_otg_08:45:242
31798995024,17cyclictest9365-21ls10:35:300
3179899501,27cyclictest2256-21cat08:45:380
31798995011,22cyclictest11617-21wc12:10:390
3179999492,12cyclictest7750irq/56-dwc_otg12:20:231
31798994929,13cyclictest0-21swapper/012:15:330
31798994927,5cyclictest14306-21aten_rbpower_cu10:50:250
31798994926,5cyclictest0-21swapper/012:20:260
3179899492,31cyclictest0-21swapper/007:45:240
31798994922,8cyclictest10096-21cron09:10:100
31798994921,13cyclictest0-21swapper/010:10:280
3179899491,29cyclictest3634-21fschecks_time10:20:280
3180099487,25cyclictest0-21swapper/212:05:262
3180099487,25cyclictest0-21swapper/212:05:262
3180099486,25cyclictest0-21swapper/207:55:162
31798994823,5cyclictest23529-21missed_timers08:15:330
3179899482,25cyclictest0-21swapper/010:05:260
31798994821,5cyclictest15947-21fschecks_count07:55:270
31798994821,10cyclictest7950irq/56-dwc_otg_08:25:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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