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2025-11-28 - 19:12

OSADL QA Farm on Real-time of Mainline Linux

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

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 r0s0s.osadl.org (updated Fri Nov 28, 2025 12:46:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12541742313281,23sleep70-21swapper/707:05:017
12545752311283,19sleep30-21swapper/307:05:133
12546132309282,17sleep40-21swapper/407:05:144
12563182296278,11sleep60-21swapper/607:07:256
12561942296260,12sleep50-21swapper/507:05:395
12545622292260,25sleep10-21swapper/107:05:031
12564862287278,6sleep20-21swapper/207:09:462
12561752286266,12sleep00-21swapper/007:05:340
1256986993430,3cyclictest833-21snmpd08:02:362
1256986993430,3cyclictest833-21snmpd08:02:362
125698499340,33cyclictest0-21swapper/010:31:380
1256991993330,2cyclictest833-21snmpd09:08:237
125699199330,31cyclictest0-21swapper/711:44:587
125699199330,31cyclictest0-21swapper/711:44:577
125699199330,30cyclictest0-21swapper/711:37:557
1256988993330,3cyclictest833-21snmpd09:59:044
125698899330,30cyclictest0-21swapper/410:37:174
1256987993330,2cyclictest833-21snmpd11:09:383
1256987993330,2cyclictest833-21snmpd09:33:113
1256987993330,2cyclictest833-21snmpd08:15:273
125698799330,30cyclictest0-21swapper/308:22:483
1256986993330,2cyclictest833-21snmpd07:46:302
1256985993330,2cyclictest833-21snmpd12:05:441
1256985993330,2cyclictest833-21snmpd11:52:101
125698599330,30cyclictest0-21swapper/107:57:211
125698599330,30cyclictest0-21swapper/107:57:211
1256984993330,2cyclictest833-21snmpd10:38:110
1256984993330,2cyclictest833-21snmpd09:23:110
1256991993230,2cyclictest833-21snmpd08:03:427
1256991993230,2cyclictest833-21snmpd08:03:427
1256991993230,1cyclictest833-21snmpd12:31:297
1256991993230,1cyclictest1390166-21ntpq11:45:257
1256991993230,1cyclictest1390166-21ntpq11:45:257
1256991993229,2cyclictest833-21snmpd08:41:467
1256991993229,2cyclictest1260556-21cat07:15:137
125699199320,30cyclictest0-21swapper/712:15:287
1256990993230,2cyclictest833-21snmpd10:15:346
1256990993230,2cyclictest833-21snmpd10:07:076
1256990993230,2cyclictest833-21snmpd08:31:016
1256989993230,2cyclictest1387434-21cat11:40:165
1256989993230,2cyclictest1387434-21cat11:40:165
125698999320,32cyclictest0-21swapper/511:12:185
1256988993229,2cyclictest833-21snmpd10:33:264
1256988993229,2cyclictest1401580-21cat12:10:144
125698899320,31cyclictest0-21swapper/412:31:594
125698899320,31cyclictest0-21swapper/409:05:164
125698899320,31cyclictest0-21swapper/408:37:434
125698899320,29cyclictest0-21swapper/411:53:304
1256987993230,1cyclictest833-21snmpd09:42:183
125698799320,31cyclictest0-21swapper/312:18:353
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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