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2026-05-28 - 07:12

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 Thu May 28, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14736862130117,8sleep40-21swapper/419:08:474
14737152119105,9sleep60-21swapper/619:09:136
14716992115103,7sleep50-21swapper/519:05:125
1473524211499,10sleep10-21swapper/119:06:281
1473476211499,10sleep70-21swapper/719:05:477
1473573211399,9sleep30-21swapper/319:07:103
1473572211398,10sleep20-21swapper/219:07:092
1473458211096,9sleep00-21swapper/019:05:320
14741439910299,2cyclictest553-21snmpd00:01:580
1474143991020,99cyclictest0-21swapper/021:00:140
1474178991010,99cyclictest0-21swapper/700:08:217
1474178991010,101cyclictest0-21swapper/700:31:497
14741729910199,2cyclictest553-21snmpd23:20:136
14741729910199,2cyclictest553-21snmpd20:22:186
14741729910198,3cyclictest553-21snmpd00:06:546
1474172991010,101cyclictest0-21swapper/621:53:346
14741699910199,2cyclictest553-21snmpd22:43:545
1474169991010,100cyclictest0-21swapper/522:18:415
14741649910199,2cyclictest553-21snmpd22:56:014
14741649910199,2cyclictest553-21snmpd19:33:214
14741609910199,2cyclictest553-21snmpd00:16:393
14741609910198,3cyclictest553-21snmpd23:10:103
14741609910198,3cyclictest553-21snmpd22:25:193
14741609910198,3cyclictest553-21snmpd22:06:453
14741549910199,2cyclictest553-21snmpd20:36:272
14741549910199,2cyclictest553-21snmpd00:04:252
14741549910199,1cyclictest553-21snmpd19:58:102
1474154991010,100cyclictest1535639-21diskmemload22:50:462
1474154991010,100cyclictest0-21swapper/220:46:412
1474154991010,100cyclictest0-21swapper/220:22:142
1474154991010,100cyclictest0-21swapper/219:29:272
1474150991010,100cyclictest0-21swapper/100:10:211
14741439910199,1cyclictest553-21snmpd23:41:000
147414399101100,1cyclictest553-21snmpd22:52:340
1474143991010,100cyclictest0-21swapper/023:22:430
1474143991010,100cyclictest0-21swapper/020:10:350
1474178991000,99cyclictest0-21swapper/723:12:087
1474178991000,99cyclictest0-21swapper/720:58:517
1474178991000,99cyclictest0-21swapper/720:03:587
1474178991000,1cyclictest0-21swapper/700:13:307
1474178991000,100cyclictest0-21swapper/721:20:507
14741729910099,1cyclictest553-21snmpd23:38:026
14741729910099,1cyclictest553-21snmpd22:19:096
14741729910099,1cyclictest553-21snmpd21:56:356
14741729910099,1cyclictest553-21snmpd20:55:006
14741729910099,1cyclictest553-21snmpd20:46:506
14741729910099,1cyclictest553-21snmpd19:30:016
14741729910099,1cyclictest553-21snmpd00:33:436
14741729910098,2cyclictest553-21snmpd19:22:156
1474172991000,99cyclictest0-21swapper/620:32:536
1474172991000,99cyclictest0-21swapper/620:14:416
1474172991000,100cyclictest0-21swapper/621:04:256
14741699910099,1cyclictest553-21snmpd23:56:305
14741699910099,1cyclictest553-21snmpd23:45:365
14741699910099,1cyclictest553-21snmpd23:29:485
14741699910099,1cyclictest553-21snmpd23:10:435
14741699910099,1cyclictest553-21snmpd22:39:225
14741699910099,1cyclictest553-21snmpd22:29:095
14741699910099,1cyclictest553-21snmpd21:42:445
14741699910099,1cyclictest553-21snmpd21:30:405
14741699910099,1cyclictest553-21snmpd21:19:015
14741699910099,1cyclictest553-21snmpd00:12:285
14741699910098,2cyclictest553-21snmpd00:20:045
14741699910097,2cyclictest553-21snmpd23:30:295
14741699910097,0cyclictest553-21snmpd20:51:185
1474169991000,99cyclictest0-21swapper/522:34:075
1474169991000,99cyclictest0-21swapper/522:00:205
1474169991000,100cyclictest0-21swapper/522:54:425
1474169991000,100cyclictest0-21swapper/520:15:145
1474169991000,100cyclictest0-21swapper/500:35:155
14741649910099,1cyclictest553-21snmpd22:02:214
14741649910099,1cyclictest553-21snmpd20:24:594
14741649910098,2cyclictest553-21snmpd21:15:464
14741649910098,2cyclictest553-21snmpd00:32:294
14741649910098,1cyclictest553-21snmpd21:08:394
1474164991000,99cyclictest0-21swapper/423:55:184
1474164991000,99cyclictest0-21swapper/422:32:344
1474164991000,100cyclictest0-21swapper/419:54:234
1474164991000,100cyclictest0-21swapper/419:48:324
14741609910099,1cyclictest553-21snmpd22:23:513
14741609910099,1cyclictest553-21snmpd20:00:193
14741609910098,2cyclictest553-21snmpd00:29:173
14741549910099,1cyclictest553-21snmpd23:07:342
14741549910099,1cyclictest553-21snmpd00:35:402
14741549910098,2cyclictest553-21snmpd21:40:232
1474154991000,99cyclictest0-21swapper/223:53:092
1474154991000,99cyclictest0-21swapper/222:31:042
1474154991000,99cyclictest0-21swapper/222:03:062
1474154991000,99cyclictest0-21swapper/220:53:252
1474154991000,99cyclictest0-21swapper/219:50:462
1474154991000,100cyclictest0-21swapper/221:20:132
1474154991000,100cyclictest0-21swapper/200:34:232
14741509910099,1cyclictest553-21snmpd23:08:131
14741509910098,2cyclictest553-21snmpd22:00:061
1474150991000,99cyclictest0-21swapper/122:50:281
1474150991000,99cyclictest0-21swapper/121:46:401
1474150991000,100cyclictest0-21swapper/122:25:371
1474150991000,100cyclictest0-21swapper/120:49:071
1474150991000,100cyclictest0-21swapper/119:57:311
14741439910099,1cyclictest553-21snmpd22:31:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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