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2025-12-07 - 09:25

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 Sun Dec 07, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37174652146133,8sleep60-21swapper/619:07:166
37175272138109,9sleep10-21swapper/119:08:081
37175372131109,17sleep20-21swapper/219:08:172
37176552129114,10sleep50-21swapper/519:09:565
37175762125110,10sleep30-21swapper/319:08:503
37175622124110,9sleep00-21swapper/019:08:390
37176082123111,8sleep70-21swapper/719:09:187
37170042121107,9sleep40-21swapper/419:05:224
371789299103100,3cyclictest3437785-21snmpd21:50:212
3717892991030,1cyclictest0-21swapper/222:49:472
37179079910199,1cyclictest3437785-21snmpd00:02:386
3717899991010,100cyclictest0-21swapper/422:57:414
37178949910199,2cyclictest3437785-21snmpd23:47:583
37178949910199,2cyclictest3437785-21snmpd23:25:003
37178949910199,2cyclictest3437785-21snmpd22:32:103
37178949910199,1cyclictest597-21lldpd19:41:593
37178949910198,3cyclictest3437785-21snmpd00:38:393
3717892991010,100cyclictest0-21swapper/223:49:342
3717892991010,100cyclictest0-21swapper/222:24:342
37178889910199,2cyclictest3437785-21snmpd21:47:151
37178889910199,2cyclictest3437785-21snmpd21:31:471
3717888991010,100cyclictest0-21swapper/121:00:401
3717883991010,100cyclictest0-21swapper/019:18:300
37179119910098,2cyclictest243-21kworker/7:122:17:157
37179119910089,11cyclictest243-21kworker/7:120:59:497
3717911991000,99cyclictest0-21swapper/723:45:227
3717911991000,99cyclictest0-21swapper/721:48:037
3717911991000,99cyclictest0-21swapper/721:37:357
3717911991000,99cyclictest0-21swapper/721:37:357
3717911991000,99cyclictest0-21swapper/719:35:557
3717911991000,99cyclictest0-21swapper/700:31:367
3717911991000,99cyclictest0-21swapper/700:22:207
37179079910099,1cyclictest3437785-21snmpd20:50:466
37179079910099,1cyclictest3437785-21snmpd19:59:266
3717907991000,99cyclictest0-21swapper/622:57:446
3717907991000,99cyclictest0-21swapper/622:07:306
3717907991000,99cyclictest0-21swapper/620:12:476
3717907991000,99cyclictest0-21swapper/620:03:026
3717907991000,99cyclictest0-21swapper/619:51:386
3717907991000,99cyclictest0-21swapper/619:46:316
3717907991000,99cyclictest0-21swapper/600:21:026
3717907991000,100cyclictest0-21swapper/623:56:556
3717907991000,100cyclictest0-21swapper/623:35:106
3717907991000,100cyclictest0-21swapper/623:34:436
3717907991000,100cyclictest0-21swapper/620:56:316
37179029910099,1cyclictest3437785-21snmpd22:56:025
37179029910099,1cyclictest3437785-21snmpd22:25:315
37179029910099,1cyclictest3437785-21snmpd22:24:585
37179029910099,1cyclictest3437785-21snmpd22:12:195
37179029910099,1cyclictest3437785-21snmpd21:06:255
37179029910099,1cyclictest3437785-21snmpd20:51:225
37179029910099,1cyclictest3437785-21snmpd20:46:075
37179029910099,1cyclictest3437785-21snmpd19:32:045
37179029910098,2cyclictest0-21swapper/522:40:055
3717902991000,99cyclictest0-21swapper/523:15:455
3717902991000,99cyclictest0-21swapper/522:06:125
3717902991000,99cyclictest0-21swapper/520:26:395
3717902991000,99cyclictest0-21swapper/520:11:055
37178999910099,1cyclictest3437785-21snmpd23:22:094
37178999910099,1cyclictest3437785-21snmpd23:15:394
37178999910099,1cyclictest3437785-21snmpd21:54:244
37178999910099,1cyclictest3437785-21snmpd20:26:424
37178999910099,1cyclictest3437785-21snmpd19:41:314
37178999910098,2cyclictest3437785-21snmpd21:39:294
37178999910098,2cyclictest3437785-21snmpd21:39:284
37178999910098,2cyclictest3437785-21snmpd00:15:594
3717899991000,100cyclictest0-21swapper/422:21:514
3717899991000,100cyclictest0-21swapper/420:55:164
37178949910099,1cyclictest3437785-21snmpd23:04:033
37178949910099,1cyclictest3437785-21snmpd21:29:533
37178949910098,2cyclictest3437785-21snmpd23:06:063
37178949910098,2cyclictest3437785-21snmpd22:54:353
37178949910098,2cyclictest3437785-21snmpd20:21:303
37178949910098,2cyclictest3437785-21snmpd19:37:493
37178949910097,3cyclictest3437785-21snmpd23:17:303
3717892991000,99cyclictest0-21swapper/221:15:152
3717892991000,99cyclictest0-21swapper/221:08:282
3717892991000,99cyclictest0-21swapper/219:56:022
3717892991000,99cyclictest0-21swapper/200:00:312
3717892991000,100cyclictest0-21swapper/222:26:132
37178889910099,1cyclictest3437785-21snmpd23:25:061
37178889910099,1cyclictest3437785-21snmpd21:19:171
37178889910099,1cyclictest3437785-21snmpd19:44:221
37178889910099,1cyclictest3437785-21snmpd19:39:041
37178889910098,2cyclictest3437785-21snmpd00:03:351
371788899100100,0cyclictest3437785-21snmpd22:13:491
3717888991000,99cyclictest0-21swapper/121:07:461
3717888991000,100cyclictest0-21swapper/122:57:141
3717888991000,100cyclictest0-21swapper/122:17:191
3717888991000,100cyclictest0-21swapper/100:17:081
37178839910099,1cyclictest3888961-21cat23:00:150
37178839910099,1cyclictest3437785-21snmpd21:57:570
37178839910099,1cyclictest3437785-21snmpd19:55:290
37178839910099,1cyclictest3437785-21snmpd19:49:350
37178839910099,1cyclictest3437785-21snmpd19:11:180
37178839910098,2cyclictest3879043-21cat22:50:140
3717883991000,99cyclictest0-21swapper/021:45:420
3717911999998,1cyclictest243-21kworker/7:122:11:397
3717911999998,1cyclictest243-21kworker/7:121:55:477
3717911999998,1cyclictest243-21kworker/7:100:05:157
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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