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2026-04-07 - 13:03

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 Tue Apr 07, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35717232126106,15sleep60-21swapper/619:07:226
35717812122106,10sleep10-21swapper/119:08:121
35718212120105,9sleep30-21swapper/319:08:473
35717982115100,10sleep70-21swapper/719:08:277
3571809211499,10sleep00-21swapper/019:08:360
3571847211083,9sleep20-21swapper/219:09:092
3571710210692,9sleep40-21swapper/419:07:124
3571722210490,9sleep50-21swapper/519:07:215
3572171991020,100cyclictest0-21swapper/721:44:387
35721579910299,2cyclictest553-21snmpd21:46:324
3572171991010,100cyclictest0-21swapper/721:45:027
3572171991010,100cyclictest0-21swapper/719:26:197
35721669910199,2cyclictest553-21snmpd23:23:266
3572166991010,100cyclictest0-21swapper/623:50:066
3572166991010,100cyclictest0-21swapper/619:41:296
35721629910199,2cyclictest553-21snmpd23:44:515
35721629910198,3cyclictest553-21snmpd21:41:055
3572162991010,0cyclictest0-21swapper/519:38:265
3572162991010,0cyclictest0-21swapper/519:14:375
35721579910199,2cyclictest553-21snmpd19:20:014
3572157991010,0cyclictest0-21swapper/422:21:454
3572157991010,0cyclictest0-21swapper/419:55:144
35721549910199,2cyclictest553-21snmpd23:10:593
35721549910199,2cyclictest553-21snmpd23:02:503
35721549910199,2cyclictest553-21snmpd23:02:493
35721549910199,1cyclictest553-21snmpd21:48:453
357215499101100,1cyclictest553-21snmpd19:23:403
3572149991010,100cyclictest0-21swapper/221:35:082
35721459910199,2cyclictest553-21snmpd00:23:411
3572145991010,99cyclictest0-21swapper/123:02:051
3572145991010,99cyclictest0-21swapper/123:02:051
3572145991010,101cyclictest0-21swapper/121:40:231
3572145991010,101cyclictest0-21swapper/120:49:271
3572145991010,0cyclictest0-21swapper/122:09:511
3572145991010,0cyclictest0-21swapper/120:54:121
3572141991010,100cyclictest0-21swapper/000:04:400
3572171991000,99cyclictest0-21swapper/723:25:237
3572171991000,100cyclictest0-21swapper/722:54:127
3572171991000,100cyclictest0-21swapper/721:51:247
3572171991000,100cyclictest0-21swapper/700:34:017
3572171991000,0cyclictest0-21swapper/700:38:237
35721669910099,1cyclictest553-21snmpd23:40:036
35721669910099,1cyclictest553-21snmpd22:57:226
35721669910099,1cyclictest553-21snmpd22:57:226
35721669910099,1cyclictest553-21snmpd22:17:156
35721669910099,1cyclictest553-21snmpd22:00:156
35721669910099,1cyclictest553-21snmpd21:54:276
35721669910099,1cyclictest553-21snmpd20:04:306
35721669910099,1cyclictest553-21snmpd19:59:116
3572166991000,99cyclictest0-21swapper/623:46:036
3572166991000,99cyclictest0-21swapper/622:08:546
3572166991000,99cyclictest0-21swapper/620:08:036
3572166991000,100cyclictest0-21swapper/623:58:226
3572166991000,100cyclictest0-21swapper/621:35:496
3572166991000,100cyclictest0-21swapper/621:15:166
3572166991000,100cyclictest0-21swapper/600:35:146
35721629910099,1cyclictest553-21snmpd23:05:445
35721629910099,1cyclictest553-21snmpd21:56:115
35721629910099,1cyclictest553-21snmpd20:33:395
35721629910099,1cyclictest553-21snmpd20:01:385
35721629910099,1cyclictest3679993-21cat21:50:145
35721629910098,2cyclictest553-21snmpd22:27:275
35721629910098,2cyclictest553-21snmpd00:22:165
35721629910097,3cyclictest553-21snmpd20:15:095
35721629910096,4cyclictest553-21snmpd22:17:515
3572162991000,100cyclictest0-21swapper/523:36:485
3572162991000,100cyclictest0-21swapper/522:43:255
3572162991000,100cyclictest0-21swapper/520:43:465
35721579910099,1cyclictest553-21snmpd23:24:534
35721579910099,1cyclictest553-21snmpd23:04:464
35721579910099,1cyclictest553-21snmpd23:04:464
35721579910099,1cyclictest553-21snmpd21:17:474
35721579910098,2cyclictest553-21snmpd23:15:414
35721579910098,2cyclictest553-21snmpd23:11:324
35721579910098,2cyclictest553-21snmpd22:27:454
35721579910098,2cyclictest553-21snmpd21:58:064
35721579910098,2cyclictest553-21snmpd21:26:294
35721579910098,2cyclictest553-21snmpd00:32:534
35721579910097,3cyclictest553-21snmpd23:29:414
3572157991000,1cyclictest3633770-21diskmemload22:56:314
3572157991000,1cyclictest3633770-21diskmemload22:56:314
3572157991000,100cyclictest0-21swapper/422:13:334
3572157991000,100cyclictest0-21swapper/421:31:494
35721549910099,1cyclictest553-21snmpd23:35:393
35721549910099,1cyclictest553-21snmpd23:06:293
35721549910099,1cyclictest553-21snmpd22:22:573
35721549910099,1cyclictest553-21snmpd22:17:023
35721549910099,1cyclictest553-21snmpd19:50:593
35721549910099,1cyclictest553-21snmpd00:05:133
35721499910099,1cyclictest553-21snmpd23:25:082
35721499910099,1cyclictest553-21snmpd00:24:232
35721499910099,1cyclictest3624875-21cat20:50:132
3572149991000,99cyclictest0-21swapper/222:23:032
3572149991000,99cyclictest0-21swapper/220:44:042
35721459910099,1cyclictest553-21snmpd22:41:341
35721459910099,1cyclictest553-21snmpd22:30:251
35721459910099,1cyclictest553-21snmpd20:20:421
35721459910098,2cyclictest553-21snmpd21:51:181
35721459910098,2cyclictest553-21snmpd20:38:541
35721459910098,2cyclictest3619857-21cat20:40:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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