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2026-03-26 - 10:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 100 highest latencies:
System rackbslot8s (updated Thu Mar 26, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17518032128113,10sleep20-21swapper/219:07:352
17517462120105,10sleep10-21swapper/119:06:461
17517842118103,10sleep30-21swapper/319:07:203
17516682118104,9sleep60-21swapper/619:05:376
1751779211499,10sleep70-21swapper/719:07:157
1751871211399,9sleep50-21swapper/519:08:335
1751689211399,9sleep00-21swapper/019:05:560
1749855211298,9sleep40-21swapper/419:05:034
1752228991020,100cyclictest0-21swapper/619:45:266
17522229910299,3cyclictest553-21snmpd19:35:204
1752222991020,101cyclictest0-21swapper/422:38:074
1752222991020,101cyclictest0-21swapper/421:50:144
17522289910199,2cyclictest553-21snmpd22:00:236
17522289910199,2cyclictest553-21snmpd22:00:236
175222899101100,1cyclictest553-21snmpd00:11:526
1752228991010,101cyclictest0-21swapper/619:29:186
17522249910199,2cyclictest553-21snmpd20:30:005
17522229910199,2cyclictest553-21snmpd23:47:094
17522229910199,2cyclictest553-21snmpd23:26:054
17522229910199,1cyclictest553-21snmpd22:13:314
17522229910198,3cyclictest553-21snmpd00:21:174
1752222991010,101cyclictest0-21swapper/421:21:294
1752222991010,100cyclictest0-21swapper/423:35:144
17522179910199,2cyclictest553-21snmpd20:35:003
175221399101100,1cyclictest553-21snmpd22:31:282
1752213991010,100cyclictest0-21swapper/223:05:142
17522089910199,2cyclictest553-21snmpd20:13:111
1752208991010,100cyclictest0-21swapper/122:00:151
1752208991010,100cyclictest0-21swapper/122:00:151
1752205991010,99cyclictest0-21swapper/021:46:230
17522329910098,2cyclictest0-21swapper/723:27:477
17522329910098,2cyclictest0-21swapper/722:42:407
1752232991000,99cyclictest0-21swapper/723:45:067
1752232991000,99cyclictest0-21swapper/720:21:477
1752232991000,99cyclictest0-21swapper/719:32:067
1752232991000,99cyclictest0-21swapper/700:35:087
1752232991000,99cyclictest0-21swapper/700:06:137
1752232991000,100cyclictest0-21swapper/723:38:127
1752232991000,100cyclictest0-21swapper/719:27:407
1752232991000,100cyclictest0-21swapper/700:00:317
17522289910099,1cyclictest553-21snmpd23:11:296
17522289910099,1cyclictest553-21snmpd20:08:486
17522249910099,1cyclictest553-21snmpd23:59:345
17522249910099,1cyclictest553-21snmpd22:24:185
17522249910099,1cyclictest553-21snmpd20:17:145
17522249910099,1cyclictest553-21snmpd20:06:425
17522249910099,1cyclictest553-21snmpd19:17:255
17522249910099,1cyclictest553-21snmpd00:15:465
1752224991000,99cyclictest0-21swapper/522:56:525
1752224991000,99cyclictest0-21swapper/520:54:285
1752224991000,99cyclictest0-21swapper/500:22:195
1752224991000,100cyclictest0-21swapper/521:38:285
17522229910099,1cyclictest553-21snmpd21:26:204
1752222991000,98cyclictest0-21swapper/422:31:224
1752222991000,100cyclictest0-21swapper/422:15:394
1752222991000,100cyclictest0-21swapper/420:43:304
1752222991000,100cyclictest0-21swapper/419:26:124
1752222991000,100cyclictest0-21swapper/419:10:344
17522179910099,1cyclictest553-21snmpd20:38:093
17522179910099,1cyclictest553-21snmpd19:33:003
17522179910099,1cyclictest553-21snmpd19:13:163
17522179910099,1cyclictest553-21snmpd00:23:323
17522139910099,1cyclictest553-21snmpd23:25:122
17522139910099,1cyclictest553-21snmpd20:51:252
17522139910099,1cyclictest553-21snmpd20:38:062
17522139910099,1cyclictest553-21snmpd20:04:272
17522139910099,1cyclictest553-21snmpd19:29:422
17522139910099,1cyclictest553-21snmpd00:03:422
17522139910098,2cyclictest553-21snmpd22:56:292
17522139910098,2cyclictest553-21snmpd22:24:452
1752213991000,99cyclictest0-21swapper/223:56:102
1752213991000,99cyclictest0-21swapper/222:45:372
1752213991000,99cyclictest0-21swapper/222:00:422
1752213991000,99cyclictest0-21swapper/222:00:422
1752213991000,99cyclictest0-21swapper/220:42:282
1752213991000,99cyclictest0-21swapper/219:56:112
1752213991000,99cyclictest0-21swapper/200:10:212
1752213991000,100cyclictest0-21swapper/222:27:162
17522089910099,1cyclictest553-21snmpd23:33:411
17522089910099,1cyclictest553-21snmpd23:11:221
17522089910099,1cyclictest553-21snmpd22:43:371
17522089910099,1cyclictest553-21snmpd22:20:191
17522089910099,1cyclictest553-21snmpd20:52:151
1752208991000,100cyclictest0-21swapper/122:09:241
1752208991000,100cyclictest0-21swapper/120:41:431
17522059910099,1cyclictest553-21snmpd22:55:560
17522059910099,1cyclictest553-21snmpd22:10:390
17522059910099,1cyclictest553-21snmpd19:15:270
17522059910099,1cyclictest1838067-21cat21:30:150
17522059910098,1cyclictest553-21snmpd21:54:380
1752205991000,99cyclictest0-21swapper/022:49:400
1752205991000,99cyclictest0-21swapper/022:17:420
1752205991000,99cyclictest0-21swapper/020:10:030
1752205991000,99cyclictest0-21swapper/019:37:130
1752232999998,1cyclictest0-21swapper/722:47:357
175223299990,99cyclictest0-21swapper/723:59:427
175223299990,99cyclictest0-21swapper/722:34:337
175223299990,99cyclictest0-21swapper/721:45:147
175223299990,99cyclictest0-21swapper/719:51:587
175223299990,99cyclictest0-21swapper/700:20:197
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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