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2025-12-28 - 10:55

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 28, 2025 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29583312128114,9sleep00-21swapper/019:05:300
29586072127112,10sleep50-21swapper/519:09:275
29585792127112,9sleep40-21swapper/419:09:034
29585482127109,9sleep20-21swapper/219:08:372
29584952124108,10sleep30-21swapper/319:07:503
29583402121107,9sleep70-21swapper/719:05:367
29586322119105,9sleep10-21swapper/119:09:481
29583662119104,10sleep60-21swapper/619:06:006
29588979910399,4cyclictest556-21snmpd21:36:346
295888599103100,3cyclictest556-21snmpd23:11:263
29588979910299,3cyclictest556-21snmpd23:31:066
29588979910299,3cyclictest556-21snmpd22:33:306
29588949910299,3cyclictest556-21snmpd22:24:575
29588859910299,3cyclictest556-21snmpd21:04:213
29588859910299,3cyclictest556-21snmpd19:40:033
29588859910297,2cyclictest556-21snmpd21:56:403
2958875991020,102cyclictest0-21swapper/121:53:581
2958897991010,101cyclictest0-21swapper/621:40:156
29588949910199,2cyclictest556-21snmpd23:55:435
29588949910199,2cyclictest556-21snmpd23:02:475
29588949910199,2cyclictest556-21snmpd22:09:445
29588949910199,2cyclictest556-21snmpd20:22:085
29588949910198,3cyclictest556-21snmpd20:55:085
29588949910198,3cyclictest556-21snmpd20:16:315
295889499101100,1cyclictest556-21snmpd23:32:305
2958894991010,100cyclictest0-21swapper/522:57:485
2958894991010,0cyclictest0-21swapper/500:27:565
29588899910199,1cyclictest556-21snmpd22:26:294
2958889991010,100cyclictest0-21swapper/422:12:514
29588859910199,2cyclictest556-21snmpd21:31:073
29588859910198,3cyclictest556-21snmpd19:55:123
2958880991010,100cyclictest0-21swapper/221:25:402
2958875991010,99cyclictest0-21swapper/120:56:451
2958875991010,101cyclictest0-21swapper/122:12:091
2958875991010,101cyclictest0-21swapper/120:31:441
2958875991010,0cyclictest0-21swapper/122:20:381
29588709910199,1cyclictest3057017-21cat21:45:150
29588979910099,1cyclictest556-21snmpd19:48:406
29588979910099,1cyclictest556-21snmpd19:17:176
29588979910098,2cyclictest556-21snmpd23:41:156
29588979910098,2cyclictest556-21snmpd22:57:066
29588979910098,2cyclictest2988656-21diskstats20:05:156
2958897991000,100cyclictest0-21swapper/622:16:156
2958897991000,0cyclictest0-21swapper/621:09:426
29588949910099,1cyclictest556-21snmpd22:50:015
29588949910099,1cyclictest556-21snmpd21:46:535
29588949910099,1cyclictest556-21snmpd21:03:275
29588949910099,1cyclictest556-21snmpd19:59:495
29588949910099,1cyclictest3116945-21cat22:45:135
2958894991000,100cyclictest0-21swapper/521:55:205
2958894991000,100cyclictest0-21swapper/519:32:295
29588899910099,1cyclictest3181636-21cat23:50:144
2958889991000,99cyclictest0-21swapper/423:58:464
2958889991000,99cyclictest0-21swapper/421:43:024
2958889991000,99cyclictest0-21swapper/421:28:254
2958889991000,99cyclictest0-21swapper/400:34:524
2958889991000,99cyclictest0-21swapper/400:26:374
2958889991000,100cyclictest0-21swapper/400:11:284
29588859910099,1cyclictest556-21snmpd23:18:223
29588859910099,1cyclictest556-21snmpd22:16:513
29588859910099,1cyclictest556-21snmpd20:36:113
29588859910098,2cyclictest556-21snmpd23:30:273
29588859910098,2cyclictest556-21snmpd19:10:323
29588859910097,3cyclictest556-21snmpd23:44:383
29588809910099,1cyclictest556-21snmpd23:23:132
29588809910099,1cyclictest556-21snmpd22:16:362
29588809910099,1cyclictest556-21snmpd21:30:042
29588809910099,1cyclictest556-21snmpd20:35:022
29588809910099,1cyclictest556-21snmpd20:07:222
29588809910099,1cyclictest556-21snmpd00:16:542
2958880991001,99cyclictest0-21swapper/223:15:072
2958880991000,99cyclictest0-21swapper/223:41:472
2958880991000,99cyclictest0-21swapper/221:15:152
2958880991000,99cyclictest0-21swapper/221:15:152
2958880991000,99cyclictest0-21swapper/220:59:542
2958880991000,99cyclictest0-21swapper/219:30:152
2958880991000,99cyclictest0-21swapper/219:16:412
29588759910099,1cyclictest556-21snmpd23:52:091
29588759910099,1cyclictest556-21snmpd23:16:341
29588759910099,1cyclictest556-21snmpd22:15:481
29588759910099,1cyclictest556-21snmpd19:49:571
29588759910099,1cyclictest556-21snmpd19:39:181
29588759910098,2cyclictest556-21snmpd21:45:341
29588759910098,2cyclictest556-21snmpd20:48:021
2958875991000,99cyclictest0-21swapper/123:24:081
2958875991000,99cyclictest0-21swapper/119:26:301
29588709910099,1cyclictest556-21snmpd23:29:300
29588709910099,1cyclictest556-21snmpd20:55:240
29588709910099,1cyclictest556-21snmpd20:44:290
2958870991000,99cyclictest0-21swapper/022:31:060
2958870991000,99cyclictest0-21swapper/021:14:280
2958870991000,99cyclictest0-21swapper/021:14:270
2958870991000,100cyclictest0-21swapper/021:57:140
2958870991000,100cyclictest0-21swapper/021:20:180
2958870991000,100cyclictest0-21swapper/019:45:470
2958870991000,100cyclictest0-21swapper/019:12:160
295890099990,0cyclictest0-21swapper/722:43:527
295890099990,0cyclictest0-21swapper/721:31:397
2958897999999,0cyclictest556-21snmpd00:24:026
2958897999998,1cyclictest556-21snmpd20:00:406
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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