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2025-12-23 - 09:34

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 Dec 23, 2025 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20368882134120,9sleep00-21swapper/019:09:390
20367982130115,10sleep20-21swapper/219:08:212
20368772129115,9sleep70-21swapper/719:09:307
2036802212798,9sleep60-21swapper/619:08:256
20366852124108,10sleep30-21swapper/319:06:453
20367452123109,9sleep50-21swapper/519:07:365
20368922121107,9sleep40-21swapper/419:09:434
20368422121106,10sleep10-21swapper/119:09:001
2037146991030,100cyclictest0-21swapper/021:50:170
20371689910299,3cyclictest556-21snmpd23:05:355
2037154991020,0cyclictest0-21swapper/220:51:362
2037177991010,99cyclictest0-21swapper/721:30:197
2037177991010,100cyclictest0-21swapper/721:27:437
2037177991010,100cyclictest0-21swapper/700:35:207
20371689910199,2cyclictest556-21snmpd00:29:505
20371689910198,2cyclictest556-21snmpd21:24:435
2037168991010,100cyclictest0-21swapper/521:55:535
20371639910199,2cyclictest556-21snmpd22:31:514
203716399101100,1cyclictest556-21snmpd23:47:364
203716399101100,1cyclictest556-21snmpd21:22:224
20371599910199,2cyclictest556-21snmpd23:56:343
20371599910199,2cyclictest556-21snmpd21:56:443
20371599910199,2cyclictest556-21snmpd21:27:403
20371549910199,2cyclictest556-21snmpd21:56:052
2037154991010,100cyclictest0-21swapper/221:24:162
2037154991010,0cyclictest0-21swapper/219:28:182
20371519910199,2cyclictest556-21snmpd22:28:481
20371519910199,2cyclictest556-21snmpd00:07:521
20371519910199,2cyclictest556-21snmpd00:07:521
20371469910199,2cyclictest556-21snmpd22:06:170
20371469910198,1cyclictest556-21snmpd20:51:090
203714699101100,1cyclictest556-21snmpd22:02:530
2037177991000,100cyclictest0-21swapper/720:30:537
2037177991000,100cyclictest0-21swapper/720:30:537
20371729910099,1cyclictest556-21snmpd21:09:306
20371729910099,1cyclictest556-21snmpd20:57:486
20371729910099,1cyclictest556-21snmpd20:30:506
20371729910099,1cyclictest556-21snmpd20:30:506
20371729910099,1cyclictest556-21snmpd19:17:086
20371729910099,1cyclictest2082001-21cat20:35:146
2037172991000,99cyclictest0-21swapper/621:11:096
2037172991000,99cyclictest0-21swapper/619:49:006
2037172991000,99cyclictest0-21swapper/619:40:366
2037172991000,100cyclictest0-21swapper/622:54:226
20371689910099,1cyclictest556-21snmpd23:30:395
20371689910099,1cyclictest556-21snmpd22:39:495
20371689910099,1cyclictest556-21snmpd20:23:025
20371689910099,1cyclictest556-21snmpd19:13:025
20371689910099,1cyclictest2251252-21cat23:40:165
20371689910098,2cyclictest556-21snmpd23:17:025
20371689910098,2cyclictest556-21snmpd22:40:195
20371689910098,2cyclictest556-21snmpd19:42:095
20371689910097,3cyclictest2196016-21cat22:45:195
203716899100100,0cyclictest556-21snmpd21:46:055
2037168991000,99cyclictest0-21swapper/522:03:525
2037168991000,99cyclictest0-21swapper/521:01:575
2037168991000,99cyclictest0-21swapper/520:58:215
2037168991000,99cyclictest0-21swapper/520:19:315
20371639910099,1cyclictest556-21snmpd22:23:094
20371639910099,1cyclictest556-21snmpd22:04:024
20371639910099,1cyclictest556-21snmpd21:40:284
20371639910099,1cyclictest556-21snmpd19:19:324
20371639910099,1cyclictest556-21snmpd19:12:564
2037163991000,99cyclictest0-21swapper/421:31:464
2037163991000,99cyclictest0-21swapper/420:09:554
2037163991000,100cyclictest0-21swapper/423:26:444
2037163991000,100cyclictest0-21swapper/420:28:234
2037163991000,100cyclictest0-21swapper/420:28:234
20371599910099,1cyclictest556-21snmpd22:05:383
20371599910099,1cyclictest556-21snmpd22:00:023
20371599910099,1cyclictest556-21snmpd21:46:593
20371599910099,1cyclictest556-21snmpd21:41:253
20371599910099,1cyclictest556-21snmpd20:00:493
20371599910099,1cyclictest556-21snmpd19:20:083
20371599910099,0cyclictest593-21lldpd19:33:523
20371549910099,1cyclictest556-21snmpd20:00:372
20371549910099,1cyclictest556-21snmpd00:00:582
20371549910098,2cyclictest556-21snmpd23:50:572
2037154991000,99cyclictest0-21swapper/223:09:502
2037154991000,99cyclictest0-21swapper/222:48:492
2037154991000,99cyclictest0-21swapper/200:20:492
2037154991000,0cyclictest0-21swapper/220:44:262
20371519910099,1cyclictest556-21snmpd22:43:041
20371519910099,1cyclictest556-21snmpd20:20:491
20371519910099,1cyclictest556-21snmpd19:59:041
20371519910099,1cyclictest556-21snmpd19:43:151
2037151991000,99cyclictest0-21swapper/122:56:581
2037151991000,99cyclictest0-21swapper/121:41:431
2037151991000,99cyclictest0-21swapper/119:22:231
2037151991000,99cyclictest0-21swapper/119:18:081
2037151991000,99cyclictest0-21swapper/100:10:551
2037151991000,1cyclictest0-21swapper/122:24:421
20371469910099,1cyclictest556-21snmpd23:57:520
20371469910099,1cyclictest556-21snmpd23:39:390
20371469910099,1cyclictest556-21snmpd20:28:410
20371469910099,1cyclictest556-21snmpd20:28:410
20371469910099,1cyclictest556-21snmpd20:10:130
20371469910099,1cyclictest556-21snmpd19:20:530
20371469910099,1cyclictest2185612-21cat22:35:130
2037146991000,99cyclictest0-21swapper/021:22:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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