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2026-03-29 - 06:04

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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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 50 highest latencies:
System rackbslot8s (updated Sun Mar 29, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32350132120105,10sleep10-21swapper/119:06:131
32331662120106,9sleep00-21swapper/019:05:060
32351972117103,9sleep60-21swapper/619:08:496
32349882117103,9sleep30-21swapper/319:05:503
32331612116102,9sleep40-21swapper/419:05:024
32350052115100,10sleep20-21swapper/219:06:062
3235236211399,9sleep70-21swapper/719:09:227
3234981210894,9sleep50-21swapper/519:05:435
3235534991030,103cyclictest0-21swapper/522:18:305
3235521991030,102cyclictest0-21swapper/221:20:152
323553899102100,2cyclictest553-21snmpd22:05:556
32355349910299,3cyclictest553-21snmpd23:57:565
32355349910299,3cyclictest553-21snmpd22:36:355
32355349910299,3cyclictest553-21snmpd22:07:405
3235534991020,102cyclictest0-21swapper/520:00:005
32355269910299,3cyclictest553-21snmpd22:49:423
32355269910299,3cyclictest553-21snmpd20:28:413
32355269910299,3cyclictest553-21snmpd00:38:373
32355219910299,3cyclictest553-21snmpd21:45:572
3235521991020,100cyclictest0-21swapper/221:53:132
3235518991020,102cyclictest0-21swapper/122:17:441
3235518991020,100cyclictest0-21swapper/121:41:491
323551599102100,2cyclictest553-21snmpd22:36:110
3235541991010,101cyclictest0-21swapper/721:22:157
32355389910199,2cyclictest553-21snmpd23:42:566
32355389910199,2cyclictest553-21snmpd23:09:276
32355389910199,1cyclictest553-21snmpd21:54:266
323553899101100,1cyclictest553-21snmpd22:45:256
3235538991010,100cyclictest0-21swapper/623:28:466
32355349910199,2cyclictest553-21snmpd22:13:525
32355349910198,3cyclictest553-21snmpd21:22:315
32355349910198,3cyclictest553-21snmpd20:57:575
3235534991010,101cyclictest0-21swapper/521:17:445
3235534991010,101cyclictest0-21swapper/520:54:025
3235534991010,101cyclictest0-21swapper/519:30:535
3235534991010,100cyclictest0-21swapper/521:27:015
32355299910199,2cyclictest553-21snmpd23:30:044
32355299910199,2cyclictest553-21snmpd21:40:124
32355299910199,1cyclictest605-21lldpd00:32:484
323552999101100,1cyclictest553-21snmpd23:26:134
323552999101100,1cyclictest553-21snmpd20:39:014
32355269910199,2cyclictest553-21snmpd22:04:493
32355269910199,2cyclictest553-21snmpd21:15:273
32355269910199,2cyclictest553-21snmpd19:46:083
32355269910199,2cyclictest553-21snmpd19:42:023
32355269910199,2cyclictest553-21snmpd19:24:583
32355269910198,3cyclictest553-21snmpd20:06:453
3235521991010,101cyclictest0-21swapper/223:05:372
3235521991010,101cyclictest0-21swapper/222:00:142
3235521991010,0cyclictest0-21swapper/221:56:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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