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2026-04-25 - 09:53

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 Apr 25, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3685849212393,10sleep20-21swapper/219:05:582
3686101212293,9sleep30-21swapper/319:09:363
36860022119105,9sleep70-21swapper/719:08:127
36859352118104,9sleep50-21swapper/519:07:135
3686073211499,10sleep40-21swapper/419:09:134
3685793211298,9sleep60-21swapper/619:05:226
3686098211197,9sleep00-21swapper/019:09:330
3685886211096,9sleep10-21swapper/119:06:291
3686355991030,103cyclictest0-21swapper/120:55:151
3686355991030,100cyclictest0-21swapper/120:42:001
3686374991020,100cyclictest0-21swapper/620:40:136
36863639910299,3cyclictest553-21snmpd21:34:563
36863609910299,3cyclictest553-21snmpd22:13:422
3686360991020,100cyclictest0-21swapper/223:27:322
36863559910299,3cyclictest553-21snmpd23:29:441
36863559910299,3cyclictest553-21snmpd00:22:371
3686355991020,102cyclictest0-21swapper/120:25:151
3686355991020,100cyclictest0-21swapper/122:40:191
3686355991020,100cyclictest0-21swapper/122:40:191
3686378991010,100cyclictest0-21swapper/721:00:227
368637499101100,1cyclictest553-21snmpd23:34:346
3686371991010,99cyclictest0-21swapper/520:33:305
3686371991010,100cyclictest0-21swapper/522:15:445
36863639910199,2cyclictest553-21snmpd22:41:553
36863639910199,2cyclictest553-21snmpd22:41:553
36863639910199,2cyclictest553-21snmpd00:06:333
36863639910198,2cyclictest553-21snmpd00:17:073
36863609910199,2cyclictest553-21snmpd21:53:232
36863609910198,3cyclictest553-21snmpd21:33:592
3686360991010,100cyclictest0-21swapper/222:40:152
3686360991010,100cyclictest0-21swapper/222:40:152
3686360991010,100cyclictest0-21swapper/222:26:092
3686360991010,100cyclictest0-21swapper/219:32:312
36863559910199,2cyclictest553-21snmpd00:32:311
36863559910199,2cyclictest553-21snmpd00:26:371
3686355991010,101cyclictest0-21swapper/122:47:161
3686355991010,101cyclictest0-21swapper/121:51:081
3686355991010,101cyclictest0-21swapper/121:38:141
3686355991010,100cyclictest0-21swapper/122:01:331
36863519910199,1cyclictest553-21snmpd20:35:540
3686351991010,100cyclictest0-21swapper/023:33:290
3686351991010,100cyclictest0-21swapper/021:44:010
3686378991000,99cyclictest0-21swapper/723:44:487
3686378991000,99cyclictest0-21swapper/723:31:537
3686378991000,99cyclictest0-21swapper/722:39:167
3686378991000,99cyclictest0-21swapper/722:39:167
3686378991000,99cyclictest0-21swapper/700:29:587
3686378991000,99cyclictest0-21swapper/700:16:077
3686378991000,99cyclictest0-21swapper/700:03:547
3686378991000,0cyclictest0-21swapper/721:53:087
36863749910099,1cyclictest553-21snmpd23:51:096
36863749910099,1cyclictest553-21snmpd23:44:336
36863749910099,1cyclictest553-21snmpd23:21:476
36863749910099,1cyclictest553-21snmpd22:35:196
36863749910099,1cyclictest553-21snmpd22:35:196
36863749910099,1cyclictest553-21snmpd19:54:566
36863749910098,2cyclictest553-21snmpd23:00:346
36863749910098,2cyclictest553-21snmpd00:14:526
36863749910097,3cyclictest553-21snmpd23:09:346
36863749910095,2cyclictest553-21snmpd22:43:586
36863749910095,2cyclictest553-21snmpd22:43:586
3686374991000,99cyclictest0-21swapper/621:38:566
3686374991000,1cyclictest0-21swapper/621:26:596
3686374991000,100cyclictest0-21swapper/619:28:136
36863719910099,1cyclictest553-21snmpd22:55:585
36863719910099,1cyclictest553-21snmpd22:53:105
36863719910099,1cyclictest553-21snmpd21:08:105
36863719910099,1cyclictest553-21snmpd20:46:275
36863719910099,1cyclictest553-21snmpd20:17:025
36863719910099,1cyclictest553-21snmpd19:35:375
36863719910099,1cyclictest553-21snmpd19:10:575
3686371991000,99cyclictest0-21swapper/523:13:085
3686371991000,99cyclictest0-21swapper/522:26:455
3686371991000,99cyclictest0-21swapper/519:47:095
3686371991000,99cyclictest0-21swapper/500:15:195
3686371991000,1cyclictest0-21swapper/521:32:295
3686371991000,100cyclictest0-21swapper/523:22:205
36863689910099,1cyclictest553-21snmpd22:18:454
3686368991000,99cyclictest0-21swapper/421:31:354
3686368991000,99cyclictest0-21swapper/420:58:004
3686368991000,99cyclictest0-21swapper/420:06:014
3686368991000,99cyclictest0-21swapper/419:36:134
3686368991000,99cyclictest0-21swapper/400:21:304
3686368991000,100cyclictest0-21swapper/423:00:464
3686368991000,100cyclictest0-21swapper/420:45:214
3686368991000,100cyclictest0-21swapper/400:07:004
36863639910099,1cyclictest553-21snmpd23:17:083
36863639910099,1cyclictest553-21snmpd23:11:113
36863639910099,1cyclictest553-21snmpd22:29:033
36863639910099,1cyclictest553-21snmpd22:21:273
36863639910099,1cyclictest553-21snmpd21:55:353
36863639910099,1cyclictest553-21snmpd19:19:333
36863639910098,2cyclictest553-21snmpd23:46:063
36863639910098,2cyclictest553-21snmpd23:09:563
36863639910098,2cyclictest553-21snmpd20:29:003
36863609910099,1cyclictest553-21snmpd20:49:302
36863609910099,1cyclictest553-21snmpd20:21:122
36863609910098,2cyclictest553-21snmpd22:07:112
36863609910098,2cyclictest553-21snmpd21:26:382
3686360991000,99cyclictest0-21swapper/220:17:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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