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2025-07-01 - 08:13

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #5

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.
Unexpectedly long latencies may be caused by SMIs
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 rack0slot5s.osadl.org (updated Tue Jul 01, 2025 00:47:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4551222395369,18sleep70-21swapper/719:07:4913
4551032368310,18sleep80-21swapper/819:07:3414
4549582364338,18sleep110-21swapper/1119:05:283
4550152354328,17sleep140-21swapper/1419:06:206
4550712353328,17sleep130-21swapper/1319:07:075
4522082348324,16sleep30-21swapper/319:05:049
4552652345318,18sleep50-21swapper/519:09:5711
4552532345318,18sleep120-21swapper/1219:09:474
4551872344317,18sleep00-21swapper/019:08:470
4550872344319,17sleep100-21swapper/1019:07:202
4552592343316,18sleep10-21swapper/119:09:531
4550102343317,18sleep90-21swapper/919:06:1415
4551342342315,18sleep20-21swapper/219:08:008
4551192342315,18sleep40-21swapper/419:07:4610
4549812341314,18sleep150-21swapper/1519:05:487
4550822339312,18sleep60-21swapper/619:07:1612
45564099430,1cyclictest0-21swapper/1500:28:397
45560199437,25cyclictest0-21swapper/622:51:0112
455618994240,1cyclictest1526-21snmpd22:23:172
45560199426,25cyclictest0-21swapper/621:12:1012
45560199415,36cyclictest0-21swapper/622:07:0512
45560199382,25cyclictest0-21swapper/622:40:0312
45559699380,38cyclictest0-21swapper/523:09:3011
45558399380,38cyclictest0-21swapper/223:09:308
455588993736,1cyclictest0-21swapper/323:09:309
455631993511,6cyclictest0-21swapper/1300:09:465
455610993433,1cyclictest0-21swapper/823:39:2414
455576993332,1cyclictest0-21swapper/123:39:251
45560199327,25cyclictest0-21swapper/621:34:0812
45560199327,25cyclictest0-21swapper/619:55:1812
45564099312,26cyclictest0-21swapper/1519:18:037
45560199317,24cyclictest0-21swapper/619:33:1912
45560199317,11cyclictest0-21swapper/620:06:1612
45559299311,30cyclictest0-21swapper/419:13:4310
455605993029,0cyclictest0-21swapper/723:39:2413
45560199306,24cyclictest0-21swapper/621:56:0612
45560199306,24cyclictest0-21swapper/619:22:2012
45560199306,24cyclictest0-21swapper/600:18:5312
45560199306,11cyclictest0-21swapper/623:45:5612
45560199306,11cyclictest0-21swapper/623:45:5612
45559299300,30cyclictest0-21swapper/400:36:4910
455610992910,4cyclictest1526-21snmpd19:15:5314
45560199296,23cyclictest0-21swapper/600:29:5212
45560199295,24cyclictest0-21swapper/623:56:5512
45560199295,24cyclictest0-21swapper/623:12:5912
45560199295,24cyclictest0-21swapper/623:02:0112
45560199295,24cyclictest0-21swapper/621:45:0812
45560199295,24cyclictest0-21swapper/621:45:0812
45558899295,14cyclictest0-21swapper/323:45:069
45558899295,14cyclictest0-21swapper/323:45:069
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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