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2025-10-15 - 22:10

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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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 Wed Oct 15, 2025 12:43:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
759125830,4sleep20-21swapper/207:10:172
2318721770,5sleep2776399cyclictest12:21:162
683021100,2sleep10-21swapper/112:00:331
156902950,2sleep10-21swapper/107:30:411
21632930,1sleep20-21swapper/211:53:502
121102890,2sleep30-21swapper/311:20:453
281952790,2sleep10-21swapper/112:28:071
92082750,2sleep20-21swapper/212:03:122
776199744,28cyclictest0-21swapper/011:40:280
7762997335,19cyclictest7760-21cyclictest07:10:191
81702720,2sleep00-21swapper/007:10:350
64052710,1sleep30-21swapper/309:38:403
64052710,1sleep30-21swapper/309:38:403
47462700,1sleep30-21swapper/308:30:323
776199658,34cyclictest0-21swapper/012:30:220
776199658,34cyclictest0-21swapper/012:30:220
7761996431,7cyclictest0-21swapper/010:15:290
776199642,16cyclictest0-21swapper/008:15:280
72192633,14sleep30-21swapper/307:06:473
776199624,33cyclictest0-21swapper/007:50:320
776199612,26cyclictest0-21swapper/007:40:280
7761996122,24cyclictest0-21swapper/007:15:220
776199607,28cyclictest667-21grep11:50:460
776199602,42cyclictest0-21swapper/011:55:420
776199602,42cyclictest0-21swapper/011:55:420
776199601,41cyclictest22360-21ntp_kernel_pll_12:20:400
776199598,28cyclictest0-21swapper/009:05:410
776199591,27cyclictest24059-21grep10:50:480
7761995837,6cyclictest7950irq/56-dwc_otg_11:25:440
7761995824,32cyclictest101ktimersoftd/010:05:290
7761995810,28cyclictest0-21swapper/009:30:450
776199571,30cyclictest610-21grep11:05:300
776199564,28cyclictest7331-21grep10:25:460
7761995633,11cyclictest8050irq/56-dwc_otg_10:45:440
7761995632,4cyclictest11879-21aten_rbpower_vo08:50:440
776199561,31cyclictest964-21aten_rbpower_en08:20:320
776199561,30cyclictest29679-21unixbench_multi10:10:470
7761995535,5cyclictest7950irq/56-dwc_otg_12:10:160
776199552,30cyclictest29595-21sed11:45:460
776199552,27cyclictest28047-21aten_rbpower_vo08:05:300
7761995518,17cyclictest6897-21missed_timers08:35:370
7761995511,24cyclictest29876-21fschecks_time09:25:350
7761995429,13cyclictest0-21swapper/009:40:310
7761995427,5cyclictest3132-21fschecks_time10:20:390
776199542,27cyclictest0-21swapper/011:35:170
776199541,33cyclictest18188-21sed07:35:440
776199541,33cyclictest18188-21sed07:35:440
776199541,31cyclictest8895-21ps08:40:420
776199541,29cyclictest17644-21modprobe09:55:160
7761995412,20cyclictest12472-21latency_hist10:35:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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