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2026-04-22 - 12:15

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 Apr 22, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
231061699168168,0cyclictest0-21swapper/419:34:584
231062899167167,0cyclictest0-21swapper/720:24:357
2310064212494,9sleep30-21swapper/319:05:343
23101542121107,9sleep10-21swapper/119:06:521
23102622118103,10sleep60-21swapper/619:08:256
23101532117103,9sleep00-21swapper/019:06:510
2310081211787,10sleep20-21swapper/219:05:492
23100572117103,9sleep50-21swapper/519:05:285
23101102114100,9sleep40-21swapper/419:06:164
2310216211399,9sleep70-21swapper/719:07:467
2310609991030,100cyclictest0-21swapper/200:35:372
23106209910299,3cyclictest2417837-21cat21:50:155
231062099102100,2cyclictest553-21snmpd21:26:045
2310620991020,100cyclictest2371960-21diskmemload23:40:205
2310620991020,100cyclictest0-21swapper/519:55:075
2310620991020,100cyclictest0-21swapper/500:11:035
23106139910299,3cyclictest553-21snmpd00:26:283
23106139910299,3cyclictest553-21snmpd00:06:363
23106099910299,3cyclictest553-21snmpd23:53:432
23106009910299,3cyclictest553-21snmpd00:09:090
2310600991020,102cyclictest0-21swapper/023:15:170
23106289910199,2cyclictest0-21swapper/722:41:287
23106239910199,2cyclictest553-21snmpd00:19:196
2310623991010,101cyclictest0-21swapper/621:05:316
2310623991010,101cyclictest0-21swapper/600:20:286
2310623991010,100cyclictest0-21swapper/620:50:156
2310623991010,100cyclictest0-21swapper/600:01:426
23106209910199,2cyclictest553-21snmpd23:28:355
23106209910199,2cyclictest553-21snmpd22:10:155
23106209910199,2cyclictest553-21snmpd00:33:135
23106209910198,3cyclictest553-21snmpd23:58:125
2310620991010,101cyclictest0-21swapper/521:22:135
2310620991010,100cyclictest0-21swapper/521:01:035
2310620991010,100cyclictest0-21swapper/520:58:335
2310620991010,100cyclictest0-21swapper/500:22:405
23106169910199,1cyclictest553-21snmpd23:01:434
23106169910199,1cyclictest553-21snmpd22:40:464
23106139910199,2cyclictest553-21snmpd23:48:153
23106139910199,2cyclictest553-21snmpd23:15:143
23106139910199,2cyclictest553-21snmpd20:30:323
23106139910199,2cyclictest553-21snmpd00:19:433
23106139910198,3cyclictest553-21snmpd21:23:583
231061399101100,1cyclictest553-21snmpd20:23:113
23106099910198,3cyclictest553-21snmpd21:34:582
2310609991010,100cyclictest0-21swapper/220:12:082
23106049910199,2cyclictest570-21ntpd00:31:571
2310604991010,100cyclictest0-21swapper/121:06:021
23106009910199,2cyclictest553-21snmpd22:28:180
23106009910199,2cyclictest553-21snmpd19:51:490
23106009910199,2cyclictest2355508-21cat20:35:170
2310600991010,100cyclictest0-21swapper/019:17:120
2310600991010,100cyclictest0-21swapper/000:35:440
2310628991000,99cyclictest0-21swapper/722:07:367
2310628991000,99cyclictest0-21swapper/700:06:217
2310628991000,100cyclictest0-21swapper/723:08:587
2310628991000,100cyclictest0-21swapper/722:58:137
2310628991000,100cyclictest0-21swapper/719:23:157
23106239910099,1cyclictest553-21snmpd23:57:426
23106239910099,1cyclictest553-21snmpd21:57:566
23106239910099,1cyclictest553-21snmpd21:53:536
23106239910099,1cyclictest553-21snmpd19:56:346
23106239910099,1cyclictest2478060-21kworker/6:023:18:176
23106239910098,1cyclictest553-21snmpd21:01:456
23106239910097,3cyclictest553-21snmpd20:37:006
23106239910097,3cyclictest553-21snmpd20:01:056
2310623991000,99cyclictest2371960-21diskmemload21:31:076
2310623991000,1cyclictest0-21swapper/623:12:506
2310623991000,1cyclictest0-21swapper/623:05:556
2310623991000,1cyclictest0-21swapper/621:36:226
23106209910099,1cyclictest553-21snmpd23:16:175
23106209910099,1cyclictest553-21snmpd22:08:455
23106209910099,1cyclictest553-21snmpd21:44:265
23106209910099,1cyclictest553-21snmpd00:26:135
23106209910098,2cyclictest553-21snmpd23:36:535
23106209910098,2cyclictest553-21snmpd22:42:075
23106209910098,2cyclictest553-21snmpd21:55:145
23106209910098,2cyclictest553-21snmpd21:14:195
23106209910098,2cyclictest553-21snmpd20:09:025
23106209910098,1cyclictest0-21swapper/500:37:525
23106209910097,3cyclictest553-21snmpd22:31:065
23106209910097,3cyclictest2342883-21cat20:10:155
2310620991000,99cyclictest0-21swapper/519:53:405
2310620991000,100cyclictest0-21swapper/521:30:255
2310620991000,100cyclictest0-21swapper/519:45:145
23106169910099,1cyclictest553-21snmpd19:52:194
23106169910099,1cyclictest2342879-21cat20:10:154
2310616991000,99cyclictest0-21swapper/422:49:344
2310616991000,99cyclictest0-21swapper/420:37:124
2310616991000,100cyclictest0-21swapper/423:58:244
2310616991000,100cyclictest0-21swapper/421:41:384
2310616991000,100cyclictest0-21swapper/419:49:014
2310616991000,0cyclictest0-21swapper/423:21:174
23106139910098,2cyclictest553-21snmpd23:43:023
23106139910098,2cyclictest553-21snmpd21:47:233
23106139910098,2cyclictest553-21snmpd19:31:493
23106139910098,1cyclictest553-21snmpd22:42:583
23106099910099,1cyclictest553-21snmpd21:36:102
23106099910099,1cyclictest553-21snmpd20:49:482
23106099910099,1cyclictest2518251-21cat23:20:152
23106099910098,2cyclictest553-21snmpd21:16:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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