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2025-12-17 - 22:26

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 Wed Dec 17, 2025 12:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
847182130116,9sleep50-21swapper/507:06:385
846982127110,11sleep30-21swapper/307:06:203
849072126110,10sleep60-21swapper/607:09:206
849392124109,9sleep20-21swapper/207:09:472
848082124110,9sleep10-21swapper/107:07:541
828412124110,9sleep40-21swapper/407:05:084
847602123107,10sleep00-21swapper/007:07:130
8519299122121,1cyclictest556-21snmpd12:04:144
847112122108,9sleep70-21swapper/707:06:337
851899910398,4cyclictest556-21snmpd08:35:113
851999910299,3cyclictest556-21snmpd09:07:306
8519999102100,2cyclictest556-21snmpd11:32:536
851899910299,3cyclictest556-21snmpd11:36:283
851859910299,3cyclictest556-21snmpd11:35:342
85204991010,100cyclictest0-21swapper/712:05:467
85204991010,100cyclictest0-21swapper/711:36:517
85204991010,100cyclictest0-21swapper/710:11:267
85204991010,100cyclictest0-21swapper/709:30:207
851999910198,3cyclictest556-21snmpd10:38:066
8519999101100,1cyclictest556-21snmpd11:21:506
8519999101100,1cyclictest556-21snmpd10:51:026
85196991010,100cyclictest0-21swapper/509:42:405
8519299101100,1cyclictest556-21snmpd10:21:374
85192991010,99cyclictest0-21swapper/409:53:394
851899910199,2cyclictest556-21snmpd08:11:403
851899910198,3cyclictest556-21snmpd10:06:593
851859910199,2cyclictest556-21snmpd12:05:372
851859910198,3cyclictest556-21snmpd09:38:402
851859910197,3cyclictest556-21snmpd10:03:442
85185991010,101cyclictest0-21swapper/210:25:122
8518099101100,1cyclictest556-21snmpd12:04:411
85180991010,100cyclictest0-21swapper/108:48:211
851769910199,1cyclictest556-21snmpd11:01:230
85176991010,100cyclictest0-21swapper/009:06:130
85204991000,99cyclictest0-21swapper/711:48:377
85204991000,99cyclictest0-21swapper/710:19:547
85204991000,99cyclictest0-21swapper/708:36:547
85204991000,99cyclictest0-21swapper/707:15:567
85204991000,100cyclictest0-21swapper/710:40:277
85204991000,100cyclictest0-21swapper/709:20:277
851999910099,1cyclictest556-21snmpd07:22:056
851999910099,1cyclictest189166-21cat09:50:146
851999910098,2cyclictest556-21snmpd10:25:136
851999910098,2cyclictest556-21snmpd07:41:396
851999910096,4cyclictest556-21snmpd10:57:136
85199991000,99cyclictest0-21swapper/609:38:406
851969910099,1cyclictest556-21snmpd10:51:595
851969910099,1cyclictest556-21snmpd09:16:425
851969910099,1cyclictest556-21snmpd08:00:365
851969910099,1cyclictest556-21snmpd07:20:295
851969910098,2cyclictest556-21snmpd10:24:255
85196991000,99cyclictest0-21swapper/510:34:215
85196991000,100cyclictest0-21swapper/511:02:255
85196991000,0cyclictest0-21swapper/509:56:235
851929910098,2cyclictest556-21snmpd07:58:224
85192991000,99cyclictest0-21swapper/411:14:304
85192991000,99cyclictest0-21swapper/407:35:154
85192991000,99cyclictest0-21swapper/407:30:454
85192991000,100cyclictest0-21swapper/411:15:234
85192991000,100cyclictest0-21swapper/410:34:124
85192991000,100cyclictest0-21swapper/410:07:264
851899910099,1cyclictest556-21snmpd10:54:493
851899910099,1cyclictest556-21snmpd10:40:253
851899910099,1cyclictest556-21snmpd10:35:093
851899910099,1cyclictest556-21snmpd09:49:273
851899910098,2cyclictest556-21snmpd11:51:123
851899910096,3cyclictest556-21snmpd11:00:253
851859910099,1cyclictest556-21snmpd10:10:332
851859910099,1cyclictest556-21snmpd08:54:032
851859910099,1cyclictest556-21snmpd08:36:442
851859910099,1cyclictest556-21snmpd08:01:362
851859910098,2cyclictest556-21snmpd10:31:332
851859910098,2cyclictest556-21snmpd10:19:212
85185991000,99cyclictest0-21swapper/212:24:342
85185991000,99cyclictest0-21swapper/212:14:102
85185991000,99cyclictest0-21swapper/211:21:502
85185991000,100cyclictest0-21swapper/210:51:012
85185991000,100cyclictest0-21swapper/209:07:302
851809910099,1cyclictest556-21snmpd12:38:141
851809910099,1cyclictest556-21snmpd12:38:141
851809910099,1cyclictest556-21snmpd12:15:011
851809910099,1cyclictest556-21snmpd11:29:361
851809910099,1cyclictest556-21snmpd09:44:051
851809910098,2cyclictest556-21snmpd09:46:101
85180991000,99cyclictest0-21swapper/110:26:271
85180991000,99cyclictest0-21swapper/109:51:471
85180991000,99cyclictest0-21swapper/109:32:551
851769910099,1cyclictest556-21snmpd12:01:270
851769910099,1cyclictest556-21snmpd11:52:550
851769910099,1cyclictest556-21snmpd11:25:450
851769910099,1cyclictest556-21snmpd10:07:360
851769910099,1cyclictest556-21snmpd09:29:340
851769910099,1cyclictest556-21snmpd09:19:180
851769910099,1cyclictest556-21snmpd08:18:400
85176991000,99cyclictest0-21swapper/012:20:130
8520499990,99cyclictest0-21swapper/711:44:337
8520499990,99cyclictest0-21swapper/710:07:597
8520499990,99cyclictest0-21swapper/708:08:537
8520499990,98cyclictest0-21swapper/710:55:027
85199999999,0cyclictest556-21snmpd12:14:116
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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