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2026-06-20 - 11:03

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 Sat Jun 20, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119021299174174,0cyclictest0-21swapper/619:11:326
11894662130102,9sleep30-21swapper/319:05:273
1189618212598,9sleep50-21swapper/519:07:385
11895692118104,9sleep10-21swapper/119:06:521
11895702117102,10sleep20-21swapper/219:06:542
11897702116102,9sleep70-21swapper/719:09:487
11896082115101,9sleep40-21swapper/419:07:284
1189624211298,9sleep00-21swapper/019:07:400
1189482210894,9sleep60-21swapper/619:05:386
1190194991030,100cyclictest0-21swapper/200:21:122
11901889910399,2cyclictest553-21snmpd22:57:391
11901889910399,2cyclictest553-21snmpd21:50:001
11901889910398,1cyclictest1245589-21cat20:55:141
11902129910298,3cyclictest553-21snmpd22:55:276
1190212991020,100cyclictest0-21swapper/600:39:126
119020899102100,2cyclictest553-21snmpd19:56:575
1190194991020,101cyclictest0-21swapper/220:35:332
1190194991020,100cyclictest0-21swapper/223:09:592
1190188991020,0cyclictest0-21swapper/121:10:171
119018599102100,1cyclictest553-21snmpd23:34:120
1190218991010,100cyclictest0-21swapper/722:10:377
11902129910198,3cyclictest553-21snmpd23:36:466
1190212991010,100cyclictest0-21swapper/621:41:486
11902089910199,2cyclictest553-21snmpd00:20:245
11902089910199,1cyclictest605-21lldpd00:04:565
119020899101100,1cyclictest553-21snmpd22:07:255
1190208991010,100cyclictest0-21swapper/523:03:425
1190208991010,100cyclictest0-21swapper/520:57:235
11902069910199,2cyclictest553-21snmpd23:17:064
11902069910199,2cyclictest553-21snmpd22:04:374
11902069910199,2cyclictest553-21snmpd00:15:424
119020699101100,1cyclictest553-21snmpd20:54:114
1190206991010,100cyclictest0-21swapper/420:04:184
11901949910199,2cyclictest553-21snmpd23:42:522
11901949910199,2cyclictest553-21snmpd22:47:122
11901949910199,2cyclictest553-21snmpd22:00:462
11901949910199,2cyclictest553-21snmpd21:55:462
11901949910198,3cyclictest553-21snmpd19:14:522
119019499101100,1cyclictest553-21snmpd22:25:382
1190194991010,101cyclictest1416928-21ssh23:37:272
1190194991010,101cyclictest0-21swapper/222:37:342
1190188991010,99cyclictest0-21swapper/123:50:381
1190188991010,99cyclictest0-21swapper/120:09:301
1190188991010,99cyclictest0-21swapper/119:56:121
11901859910199,2cyclictest553-21snmpd21:46:050
11901859910199,2cyclictest553-21snmpd00:05:050
1190185991010,100cyclictest0-21swapper/021:43:320
1190185991010,100cyclictest0-21swapper/021:30:420
1190185991010,100cyclictest0-21swapper/020:24:550
1190218991000,99cyclictest0-21swapper/723:56:417
1190218991000,99cyclictest0-21swapper/722:31:117
1190218991000,100cyclictest0-21swapper/721:06:557
1190218991000,100cyclictest0-21swapper/700:00:057
11902129910099,1cyclictest553-21snmpd21:35:236
11902129910099,1cyclictest553-21snmpd19:50:146
11902129910099,1cyclictest553-21snmpd19:45:126
11902129910099,1cyclictest553-21snmpd00:11:326
11902129910098,2cyclictest553-21snmpd23:25:576
11902129910098,1cyclictest553-21snmpd20:38:136
11902129910097,3cyclictest553-21snmpd00:21:426
1190212991000,99cyclictest0-21swapper/623:53:106
1190212991000,99cyclictest0-21swapper/621:17:276
1190212991000,99cyclictest0-21swapper/619:32:596
1190212991000,100cyclictest0-21swapper/623:15:276
11902089910099,1cyclictest553-21snmpd23:24:485
11902089910099,1cyclictest553-21snmpd22:43:045
11902089910099,1cyclictest553-21snmpd22:23:105
11902089910099,1cyclictest553-21snmpd21:10:205
11902089910099,1cyclictest553-21snmpd20:14:185
11902089910099,1cyclictest553-21snmpd19:17:205
11902089910099,1cyclictest553-21snmpd00:11:355
11902089910098,2cyclictest553-21snmpd00:18:275
1190208991000,99cyclictest0-21swapper/523:13:455
1190208991000,99cyclictest0-21swapper/521:53:335
1190208991000,100cyclictest0-21swapper/500:38:095
11902069910099,1cyclictest553-21snmpd22:47:054
11902069910098,2cyclictest553-21snmpd22:31:174
1190206991000,99cyclictest0-21swapper/421:36:574
1190206991000,99cyclictest0-21swapper/421:33:324
1190206991000,98cyclictest0-21swapper/419:24:224
1190206991000,100cyclictest0-21swapper/423:30:144
1190206991000,100cyclictest0-21swapper/420:07:404
11901999910099,1cyclictest553-21snmpd22:43:533
11901999910099,1cyclictest553-21snmpd22:31:083
11901999910099,1cyclictest553-21snmpd22:26:413
11901999910099,1cyclictest553-21snmpd22:00:493
11901999910099,1cyclictest553-21snmpd21:21:203
11901999910099,1cyclictest553-21snmpd21:03:283
11901999910099,1cyclictest553-21snmpd20:56:223
11901949910099,1cyclictest553-21snmpd22:16:342
11901949910099,1cyclictest553-21snmpd21:19:422
11901949910099,1cyclictest553-21snmpd21:14:062
11901949910099,1cyclictest553-21snmpd20:21:012
11901949910099,1cyclictest1392539-21cat23:15:132
11901949910098,2cyclictest553-21snmpd21:52:362
11901949910097,3cyclictest553-21snmpd22:21:142
1190194991000,100cyclictest0-21swapper/221:48:122
1190194991000,100cyclictest0-21swapper/220:40:082
1190194991000,100cyclictest0-21swapper/219:47:392
11901889910099,1cyclictest553-21snmpd00:12:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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