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2025-12-22 - 19:33

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 Mon Dec 22, 2025 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11304442137107,10sleep50-21swapper/507:05:035
11322682129114,10sleep70-21swapper/707:05:457
11324582125111,9sleep20-21swapper/207:08:282
11324272122107,10sleep00-21swapper/007:08:020
11323382121107,9sleep30-21swapper/307:06:453
11322802121106,10sleep10-21swapper/107:05:551
11324062119104,10sleep60-21swapper/607:07:446
11323032118103,9sleep40-21swapper/407:06:144
11328239910399,4cyclictest556-21snmpd10:45:153
11328299910299,2cyclictest556-21snmpd10:04:235
11328099910299,3cyclictest556-21snmpd11:26:530
11328099910299,3cyclictest556-21snmpd08:02:060
1132837991010,100cyclictest0-21swapper/710:03:177
11328349910199,2cyclictest556-21snmpd12:15:486
11328269910199,2cyclictest556-21snmpd10:49:514
113282699101100,1cyclictest556-21snmpd09:39:194
1132826991010,99cyclictest441rcuc/409:53:164
1132826991010,1cyclictest0-21swapper/412:31:434
11328239910199,2cyclictest556-21snmpd11:57:393
11328239910198,3cyclictest556-21snmpd10:42:453
1132809991010,99cyclictest0-21swapper/009:05:560
1132837991000,99cyclictest0-21swapper/712:36:587
1132837991000,99cyclictest0-21swapper/711:13:107
1132837991000,99cyclictest0-21swapper/709:30:517
1132837991000,99cyclictest0-21swapper/709:29:337
1132837991000,99cyclictest0-21swapper/709:12:157
1132837991000,100cyclictest0-21swapper/711:41:477
11328349910099,1cyclictest556-21snmpd11:35:356
11328349910099,1cyclictest556-21snmpd10:52:186
11328349910099,1cyclictest556-21snmpd10:34:546
11328349910099,1cyclictest556-21snmpd09:17:276
11328349910099,1cyclictest556-21snmpd07:56:276
11328349910099,1cyclictest556-21snmpd07:53:036
11328349910099,1cyclictest556-21snmpd07:26:056
11328349910099,1cyclictest556-21snmpd07:16:146
11328349910099,1cyclictest1193427-21cat09:05:146
11328349910098,2cyclictest556-21snmpd10:18:116
113283499100100,0cyclictest556-21snmpd10:59:286
1132834991000,100cyclictest0-21swapper/612:29:436
1132834991000,100cyclictest0-21swapper/609:51:586
1132834991000,100cyclictest0-21swapper/609:32:096
1132834991000,100cyclictest0-21swapper/608:56:356
11328299910099,1cyclictest556-21snmpd07:32:235
11328299910098,2cyclictest556-21snmpd11:59:255
11328299910098,2cyclictest556-21snmpd09:39:585
11328299910098,1cyclictest556-21snmpd12:18:045
1132829991000,99cyclictest0-21swapper/510:06:295
11328269910099,1cyclictest556-21snmpd12:05:574
11328269910099,1cyclictest556-21snmpd11:44:204
11328269910099,1cyclictest556-21snmpd09:44:284
11328269910099,1cyclictest1175153-21cat08:30:154
11328269910099,1cyclictest1133870-21cat07:10:164
1132826991000,99cyclictest0-21swapper/411:33:294
1132826991000,99cyclictest0-21swapper/410:01:024
1132826991000,100cyclictest0-21swapper/411:56:004
1132826991000,100cyclictest0-21swapper/409:20:454
1132826991000,100cyclictest0-21swapper/408:00:004
1132826991000,100cyclictest0-21swapper/407:25:264
11328239910099,1cyclictest556-21snmpd12:15:423
11328239910099,1cyclictest556-21snmpd11:13:013
11328239910099,1cyclictest556-21snmpd10:38:033
11328239910099,1cyclictest556-21snmpd09:45:133
11328239910099,1cyclictest556-21snmpd09:11:483
11328239910099,1cyclictest556-21snmpd07:17:023
11328239910098,2cyclictest556-21snmpd11:19:163
11328239910098,2cyclictest556-21snmpd10:26:273
11328239910098,2cyclictest556-21snmpd09:55:313
11328239910098,2cyclictest556-21snmpd09:21:183
11328239910097,3cyclictest556-21snmpd08:15:593
113282399100100,0cyclictest556-21snmpd11:21:383
11328189910099,1cyclictest556-21snmpd11:57:242
11328189910099,1cyclictest556-21snmpd09:27:362
11328189910099,1cyclictest556-21snmpd07:29:022
11328189910099,1cyclictest556-21snmpd07:10:282
11328189910099,1cyclictest1304882-21ntpq10:55:192
1132818991000,99cyclictest1194745-21diskmemload11:34:172
1132818991000,99cyclictest0-21swapper/212:08:392
1132818991000,99cyclictest0-21swapper/211:01:252
1132818991000,99cyclictest0-21swapper/210:32:302
1132818991000,100cyclictest0-21swapper/209:14:482
11328149910099,1cyclictest556-21snmpd12:29:461
11328149910099,1cyclictest556-21snmpd11:08:341
11328149910099,1cyclictest556-21snmpd10:19:531
11328149910099,1cyclictest556-21snmpd09:37:131
11328149910099,1cyclictest556-21snmpd09:02:291
11328149910099,1cyclictest556-21snmpd09:02:291
11328149910099,1cyclictest556-21snmpd08:22:041
11328149910099,1cyclictest556-21snmpd07:11:251
1132814991000,99cyclictest0-21swapper/108:32:041
1132814991000,100cyclictest0-21swapper/109:23:391
1132814991000,100cyclictest0-21swapper/108:07:121
11328099910099,1cyclictest556-21snmpd11:47:050
11328099910099,1cyclictest556-21snmpd11:12:070
11328099910099,1cyclictest556-21snmpd09:55:070
11328099910098,2cyclictest556-21snmpd11:02:100
11328099910098,2cyclictest556-21snmpd09:53:430
11328099910097,3cyclictest556-21snmpd11:59:510
11328099910097,3cyclictest556-21snmpd11:31:110
1132809991000,99cyclictest0-21swapper/007:47:270
1132809991000,100cyclictest0-21swapper/011:20:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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