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2026-10-30 - 10:04

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 Fri Oct 30, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40643402130114,11sleep10-21swapper/119:06:121
40642912123110,8sleep60-21swapper/619:05:306
40646062121107,9sleep30-21swapper/319:09:593
40643682121107,9sleep00-21swapper/019:06:350
40645942120106,9sleep20-21swapper/219:09:502
40645412115101,9sleep50-21swapper/519:09:055
4064531211298,9sleep40-21swapper/419:08:564
4064469211096,9sleep70-21swapper/719:08:047
406484899103100,2cyclictest553-21snmpd21:40:092
40648619910298,4cyclictest553-21snmpd23:17:555
40648429910299,3cyclictest553-21snmpd21:53:250
4064842991020,99cyclictest0-21swapper/020:50:150
4064868991010,100cyclictest0-21swapper/722:56:367
4064868991010,100cyclictest0-21swapper/720:36:347
40648619910199,2cyclictest553-21snmpd21:13:135
40648619910199,2cyclictest553-21snmpd20:52:565
40648619910199,2cyclictest553-21snmpd00:13:265
406486199101100,1cyclictest553-21snmpd19:16:175
4064861991010,99cyclictest0-21swapper/520:21:555
4064861991010,100cyclictest0-21swapper/522:43:485
4064861991010,100cyclictest0-21swapper/519:48:395
4064856991010,100cyclictest0-21swapper/421:57:104
4064856991010,100cyclictest0-21swapper/421:25:154
40648539910199,2cyclictest553-21snmpd22:54:363
40648489910199,2cyclictest553-21snmpd19:42:202
40648489910199,1cyclictest4149924-21cat21:30:152
4064848991010,100cyclictest0-21swapper/221:47:042
4064848991010,100cyclictest0-21swapper/219:18:022
40648449910199,2cyclictest553-21snmpd23:33:041
40648449910199,2cyclictest553-21snmpd20:05:191
4064844991010,100cyclictest0-21swapper/100:13:321
40648429910199,2cyclictest553-21snmpd22:09:250
406484299101100,1cyclictest553-21snmpd20:31:200
4064842991010,101cyclictest0-21swapper/023:39:250
4064842991010,101cyclictest0-21swapper/000:05:290
4064842991010,101cyclictest0-21swapper/000:05:290
4064868991000,99cyclictest0-21swapper/723:58:357
4064868991000,99cyclictest0-21swapper/723:17:417
4064868991000,99cyclictest0-21swapper/722:18:547
4064868991000,99cyclictest0-21swapper/721:04:387
4064868991000,99cyclictest0-21swapper/719:29:567
4064868991000,99cyclictest0-21swapper/700:03:237
4064868991000,100cyclictest0-21swapper/723:35:227
40648659910099,1cyclictest553-21snmpd23:49:476
40648659910099,1cyclictest553-21snmpd20:58:176
40648659910099,1cyclictest553-21snmpd19:20:326
40648659910098,2cyclictest0-21swapper/621:40:066
4064865991000,99cyclictest0-21swapper/622:57:396
4064865991000,100cyclictest0-21swapper/622:54:336
40648619910099,1cyclictest553-21snmpd23:53:205
40648619910099,1cyclictest553-21snmpd23:20:495
40648619910099,1cyclictest553-21snmpd22:48:395
40648619910098,2cyclictest553-21snmpd21:53:165
4064861991000,99cyclictest0-21swapper/521:57:285
4064861991000,99cyclictest0-21swapper/521:35:155
4064861991000,99cyclictest0-21swapper/520:35:345
4064861991000,99cyclictest0-21swapper/520:33:075
4064861991000,99cyclictest0-21swapper/519:56:305
4064861991000,98cyclictest0-21swapper/519:37:475
4064861991000,100cyclictest0-21swapper/523:31:465
4064861991000,100cyclictest0-21swapper/522:34:235
4064861991000,100cyclictest0-21swapper/522:13:385
4064861991000,100cyclictest0-21swapper/520:29:255
40648569910099,1cyclictest553-21snmpd23:26:434
40648569910099,1cyclictest100315-21cat23:40:134
40648569910098,2cyclictest0-21swapper/419:35:204
4064856991000,99cyclictest0-21swapper/423:01:004
4064856991000,100cyclictest0-21swapper/420:09:154
40648539910099,1cyclictest553-21snmpd23:59:093
40648539910099,1cyclictest553-21snmpd19:32:053
40648539910099,1cyclictest553-21snmpd00:30:513
40648539910098,2cyclictest553-21snmpd23:16:223
40648539910098,2cyclictest553-21snmpd20:59:413
40648539910098,1cyclictest553-21snmpd23:52:593
40648539910097,3cyclictest553-21snmpd22:29:563
40648489910099,1cyclictest553-21snmpd23:35:072
40648489910099,1cyclictest553-21snmpd23:06:242
40648489910099,1cyclictest553-21snmpd22:53:272
40648489910099,1cyclictest553-21snmpd22:02:142
40648489910099,1cyclictest553-21snmpd21:59:432
40648489910099,1cyclictest553-21snmpd21:14:512
40648489910099,1cyclictest553-21snmpd20:10:342
40648489910099,1cyclictest553-21snmpd00:15:542
40648489910098,2cyclictest553-21snmpd22:40:502
4064848991000,99cyclictest0-21swapper/223:21:462
4064848991000,100cyclictest0-21swapper/220:24:522
40648449910099,1cyclictest553-21snmpd23:51:211
40648449910099,1cyclictest553-21snmpd22:51:091
40648449910099,1cyclictest553-21snmpd21:17:001
40648449910099,1cyclictest553-21snmpd20:55:201
40648449910099,1cyclictest553-21snmpd19:56:391
40648449910099,1cyclictest553-21snmpd19:52:061
40648449910099,1cyclictest553-21snmpd00:02:501
40648449910098,2cyclictest553-21snmpd23:08:301
4064844991000,99cyclictest0-21swapper/121:55:141
4064844991000,99cyclictest0-21swapper/121:20:271
4064844991000,100cyclictest0-21swapper/119:25:141
40648429910099,1cyclictest553-21snmpd22:48:180
40648429910099,1cyclictest553-21snmpd21:33:300
40648429910099,1cyclictest1880257-21ntpd23:46:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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