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2026-01-09 - 12:35

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 Fri Jan 09, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6340812132115,8sleep50-21swapper/519:05:525
634105213199,9sleep00-21swapper/019:06:110
634155212998,10sleep30-21swapper/319:06:543
6341332129114,10sleep10-21swapper/119:06:361
6341112125106,10sleep60-21swapper/619:06:166
6342972122108,9sleep40-21swapper/419:08:564
6341632118104,9sleep20-21swapper/219:07:012
634300211399,9sleep70-21swapper/719:08:587
634602991080,105cyclictest0-21swapper/122:25:331
63459799106100,4cyclictest2579219-21snmpd20:56:140
6345979910599,3cyclictest2579219-21snmpd23:04:160
634612991040,100cyclictest0-21swapper/421:15:144
634612991040,100cyclictest0-21swapper/421:15:144
6346029910399,4cyclictest2579219-21snmpd19:11:561
6346219910299,3cyclictest2579219-21snmpd19:36:296
634621991020,100cyclictest0-21swapper/621:34:496
6346049910299,3cyclictest2579219-21snmpd21:07:442
634604991020,102cyclictest0-21swapper/222:40:142
634604991020,0cyclictest0-21swapper/222:00:142
6346219910199,2cyclictest2579219-21snmpd21:52:536
6346219910199,1cyclictest2579219-21snmpd00:10:006
634621991010,0cyclictest0-21swapper/600:32:016
6346169910199,2cyclictest2579219-21snmpd20:50:025
6346169910199,1cyclictest2579219-21snmpd22:34:025
6346169910199,1cyclictest2579219-21snmpd21:13:245
63461699101100,1cyclictest2579219-21snmpd22:16:445
634616991010,100cyclictest0-21swapper/522:20:145
63461299101100,1cyclictest2579219-21snmpd00:08:424
634612991010,99cyclictest0-21swapper/420:23:424
634612991010,0cyclictest0-21swapper/419:27:584
6346089910199,2cyclictest2579219-21snmpd00:00:063
63460899101100,1cyclictest2579219-21snmpd19:55:363
6346049910199,2cyclictest2579219-21snmpd20:10:362
6346049910199,2cyclictest2579219-21snmpd00:03:362
6346049910198,3cyclictest2579219-21snmpd19:41:122
634604991010,99cyclictest0-21swapper/220:04:372
634604991010,100cyclictest0-21swapper/223:21:052
634604991010,100cyclictest0-21swapper/222:27:412
6346029910199,2cyclictest2579219-21snmpd23:46:571
6346029910199,1cyclictest2579219-21snmpd20:10:211
6346029910198,3cyclictest692403-21cat21:00:131
634602991010,99cyclictest0-21swapper/119:50:331
634602991010,100cyclictest0-21swapper/123:53:301
634602991010,100cyclictest0-21swapper/121:26:581
6345979910198,3cyclictest2579219-21snmpd00:17:370
63459799101100,1cyclictest2579219-21snmpd19:30:020
634597991010,99cyclictest696235-21diskmemload22:15:340
634597991010,101cyclictest0-21swapper/022:58:340
634597991010,101cyclictest0-21swapper/021:34:340
634597991010,100cyclictest0-21swapper/020:33:470
634623991000,99cyclictest0-21swapper/723:36:507
634623991000,100cyclictest0-21swapper/722:10:077
6346219910099,1cyclictest2579219-21snmpd23:31:356
6346219910099,1cyclictest2579219-21snmpd19:59:146
6346219910099,1cyclictest2579219-21snmpd19:25:416
6346219910098,2cyclictest2579219-21snmpd21:45:526
6346219910097,3cyclictest2579219-21snmpd22:19:036
634621991000,99cyclictest0-21swapper/621:20:576
634621991000,99cyclictest0-21swapper/621:20:576
634621991000,100cyclictest0-21swapper/622:01:596
6346169910099,1cyclictest2579219-21snmpd23:36:445
6346169910099,1cyclictest2579219-21snmpd21:32:545
6346169910099,1cyclictest2579219-21snmpd21:00:245
6346169910099,1cyclictest2579219-21snmpd20:55:175
6346169910099,1cyclictest2579219-21snmpd19:49:545
6346169910099,1cyclictest2579219-21snmpd19:18:595
634616991000,99cyclictest0-21swapper/521:24:005
634616991000,99cyclictest0-21swapper/521:24:005
6346129910098,2cyclictest2579219-21snmpd23:30:384
6346129910098,2cyclictest2579219-21snmpd21:42:434
6346129910098,2cyclictest2579219-21snmpd19:21:144
6346129910097,3cyclictest2579219-21snmpd21:25:114
634612991000,99cyclictest0-21swapper/400:11:454
634612991000,100cyclictest0-21swapper/419:50:144
6346089910099,1cyclictest2579219-21snmpd22:57:013
6346089910099,1cyclictest2579219-21snmpd22:08:203
6346089910099,1cyclictest2579219-21snmpd21:06:093
6346089910098,1cyclictest2579219-21snmpd00:32:403
6346049910099,1cyclictest2579219-21snmpd23:51:092
6346049910099,1cyclictest2579219-21snmpd21:55:552
6346049910099,1cyclictest2579219-21snmpd21:17:242
6346049910099,1cyclictest2579219-21snmpd21:17:242
6346049910099,1cyclictest2579219-21snmpd20:23:402
6346049910099,1cyclictest2579219-21snmpd19:12:352
6346049910098,2cyclictest2579219-21snmpd22:39:332
6346049910098,1cyclictest2579219-21snmpd22:31:152
634604991000,99cyclictest0-21swapper/221:52:432
634604991000,99cyclictest0-21swapper/220:47:232
634604991000,100cyclictest0-21swapper/222:10:562
6346029910099,1cyclictest2579219-21snmpd22:53:491
6346029910099,1cyclictest2579219-21snmpd20:57:321
634602991000,99cyclictest696235-21diskmemload23:25:261
634602991000,99cyclictest0-21swapper/100:09:141
634602991000,100cyclictest0-21swapper/122:45:471
634602991000,100cyclictest0-21swapper/122:10:531
634602991000,100cyclictest0-21swapper/121:51:341
634602991000,100cyclictest0-21swapper/121:34:041
634602991000,100cyclictest0-21swapper/119:55:121
634602991000,100cyclictest0-21swapper/119:48:171
634602991000,100cyclictest0-21swapper/119:35:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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