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2026-05-09 - 00:31

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 May 08, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33567752122108,9sleep60-21swapper/607:08:496
33566142119105,9sleep20-21swapper/207:06:282
33547422118104,9sleep70-21swapper/707:05:057
33567722115100,10sleep30-21swapper/307:08:473
33565422115100,10sleep50-21swapper/507:05:275
3356613211399,9sleep10-21swapper/107:06:271
3356672211096,9sleep40-21swapper/407:07:204
3356583210893,10sleep00-21swapper/007:06:020
335709099103100,3cyclictest553-21snmpd10:08:231
3357113991020,102cyclictest0-21swapper/710:36:477
3357113991020,100cyclictest0-21swapper/708:54:327
3357113991020,100cyclictest0-21swapper/707:12:197
3357102991020,102cyclictest0-21swapper/412:33:274
33570949910299,3cyclictest553-21snmpd08:23:172
3357090991020,100cyclictest0-21swapper/111:10:091
33570859910299,2cyclictest553-21snmpd12:01:020
3357113991010,99cyclictest0-21swapper/707:47:087
3357113991010,99cyclictest0-21swapper/707:19:297
33571109910199,2cyclictest553-21snmpd12:05:236
335711099101100,1cyclictest553-21snmpd10:33:266
3357105991010,100cyclictest2919593-21kworker/5:009:18:525
33571029910198,3cyclictest553-21snmpd07:49:424
3357102991010,101cyclictest0-21swapper/411:50:504
3357102991010,100cyclictest0-21swapper/411:04:214
3357102991010,0cyclictest0-21swapper/409:30:334
33570999910199,2cyclictest553-21snmpd08:42:463
33570999910199,1cyclictest553-21snmpd10:17:143
33570949910198,3cyclictest553-21snmpd11:51:112
33570949910198,3cyclictest553-21snmpd09:33:422
335709499101100,1cyclictest553-21snmpd11:33:372
3357094991010,101cyclictest0-21swapper/210:45:232
3357094991010,101cyclictest0-21swapper/210:00:522
3357094991010,100cyclictest0-21swapper/210:28:202
3357094991010,100cyclictest0-21swapper/209:23:482
33570909910199,2cyclictest553-21snmpd10:29:381
33570909910199,2cyclictest553-21snmpd09:55:131
33570909910199,2cyclictest553-21snmpd09:23:541
335709099101100,1cyclictest553-21snmpd07:32:291
3357090991010,101cyclictest0-21swapper/110:38:201
33570859910199,2cyclictest553-21snmpd12:36:580
335708599101100,1cyclictest553-21snmpd12:14:510
335708599101100,1cyclictest553-21snmpd08:37:100
3357085991010,100cyclictest0-21swapper/009:18:060
3357085991010,100cyclictest0-21swapper/008:32:370
33571139910099,1cyclictest0-21swapper/710:16:117
3357113991000,99cyclictest0-21swapper/712:39:067
3357113991000,99cyclictest0-21swapper/712:05:597
3357113991000,99cyclictest0-21swapper/709:40:547
3357113991000,99cyclictest0-21swapper/709:11:057
3357113991000,99cyclictest0-21swapper/708:25:017
3357113991000,99cyclictest0-21swapper/707:56:577
3357113991000,99cyclictest0-21swapper/707:24:177
3357113991000,1cyclictest0-21swapper/711:48:467
3357113991000,100cyclictest0-21swapper/710:51:367
3357113991000,100cyclictest0-21swapper/709:59:477
3357113991000,100cyclictest0-21swapper/709:48:587
33571109910099,1cyclictest553-21snmpd12:16:176
33571109910099,1cyclictest553-21snmpd11:38:406
33571109910099,1cyclictest553-21snmpd08:12:156
3357110991000,99cyclictest0-21swapper/609:31:456
3357110991000,99cyclictest0-21swapper/609:20:276
3357110991000,100cyclictest0-21swapper/608:26:496
33571059910099,1cyclictest553-21snmpd12:23:395
33571059910099,1cyclictest553-21snmpd12:16:535
33571059910099,1cyclictest553-21snmpd10:39:235
33571059910099,1cyclictest553-21snmpd08:59:035
33571059910099,1cyclictest553-21snmpd08:31:235
33571059910099,1cyclictest553-21snmpd07:51:005
33571059910099,1cyclictest553-21snmpd07:16:255
33571059910098,1cyclictest0-21swapper/511:07:035
3357105991000,99cyclictest0-21swapper/511:30:355
3357105991000,99cyclictest0-21swapper/508:38:345
33571029910099,1cyclictest553-21snmpd11:13:184
33571029910099,1cyclictest553-21snmpd10:15:124
33571029910099,1cyclictest553-21snmpd10:05:434
33571029910099,1cyclictest553-21snmpd08:01:374
33571029910098,2cyclictest553-21snmpd10:11:044
3357102991000,99cyclictest3418757-21diskmemload10:42:144
3357102991000,99cyclictest0-21swapper/412:36:214
3357102991000,99cyclictest0-21swapper/412:13:174
3357102991000,99cyclictest0-21swapper/412:07:444
3357102991000,99cyclictest0-21swapper/411:23:254
3357102991000,98cyclictest0-21swapper/407:36:084
3357102991000,1cyclictest0-21swapper/409:38:214
3357102991000,100cyclictest0-21swapper/410:37:544
3357102991000,100cyclictest0-21swapper/409:41:454
3357102991000,100cyclictest0-21swapper/409:01:294
3357102991000,100cyclictest0-21swapper/407:56:244
33570999910099,1cyclictest553-21snmpd10:13:153
33570999910099,1cyclictest553-21snmpd09:21:433
33570999910099,1cyclictest553-21snmpd09:16:453
33570999910099,1cyclictest553-21snmpd08:23:133
33570999910099,1cyclictest553-21snmpd07:45:383
33570999910099,1cyclictest553-21snmpd07:30:303
33570999910098,1cyclictest605-21lldpd09:03:493
33570949910099,1cyclictest553-21snmpd10:22:082
33570949910099,1cyclictest553-21snmpd10:13:272
33570949910099,1cyclictest553-21snmpd08:40:132
33570949910098,2cyclictest553-21snmpd10:50:182
33570949910098,2cyclictest0-21swapper/209:05:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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