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2026-06-12 - 23:01

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 Fri Jun 12, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3147282142127,10sleep30-21swapper/307:05:493
3149762130101,9sleep00-21swapper/007:09:230
31526099127127,0cyclictest0-21swapper/210:17:092
3148482123108,10sleep20-21swapper/207:07:322
3148952121107,9sleep40-21swapper/407:08:134
3148092118104,9sleep10-21swapper/107:06:591
3147402118104,9sleep60-21swapper/607:06:006
3147882117103,9sleep70-21swapper/707:06:417
31527699116115,1cyclictest421427-21kworker/6:110:17:096
312910210591,9sleep50-21swapper/507:05:105
3152609910499,2cyclictest31-21ksoftirqd/209:21:492
31526899103100,3cyclictest553-21snmpd09:25:324
31526099103101,2cyclictest31-21ksoftirqd/210:54:502
31526099103100,1cyclictest31-21ksoftirqd/212:04:032
31525299103100,3cyclictest553-21snmpd12:34:500
315280991020,100cyclictest0-21swapper/707:44:487
3152689910298,3cyclictest553-21snmpd10:31:454
315268991020,102cyclictest0-21swapper/409:50:364
315280991010,99cyclictest0-21swapper/708:12:447
315280991010,100cyclictest0-21swapper/707:20:037
315276991010,100cyclictest0-21swapper/607:34:436
3152719910199,2cyclictest553-21snmpd10:44:565
315271991010,100cyclictest0-21swapper/507:40:175
3152689910199,2cyclictest553-21snmpd12:32:124
3152689910199,2cyclictest553-21snmpd07:17:184
3152689910198,3cyclictest553-21snmpd08:55:194
3152689910197,4cyclictest553-21snmpd10:24:074
315268991010,1cyclictest0-21swapper/411:52:044
315268991010,101cyclictest0-21swapper/410:35:144
315268991010,100cyclictest0-21swapper/410:13:284
3152639910199,2cyclictest553-21snmpd09:47:423
3152639910199,2cyclictest553-21snmpd07:17:273
3152609910199,2cyclictest553-21snmpd11:07:572
3152609910199,2cyclictest553-21snmpd08:40:382
3152609910199,1cyclictest31-21ksoftirqd/212:28:232
3152609910199,1cyclictest31-21ksoftirqd/212:28:232
3152609910198,0cyclictest31-21ksoftirqd/212:16:522
31526099101100,1cyclictest0-21swapper/211:00:152
315260991010,100cyclictest0-21swapper/211:12:512
315260991010,100cyclictest0-21swapper/210:47:052
315260991010,100cyclictest0-21swapper/210:05:152
315260991010,100cyclictest0-21swapper/207:43:402
3152579910199,2cyclictest553-21snmpd10:25:041
31525799101100,1cyclictest553-21snmpd09:54:091
315257991010,100cyclictest0-21swapper/111:20:181
3152529910199,2cyclictest553-21snmpd11:14:330
3152529910199,2cyclictest553-21snmpd10:46:100
3152529910199,2cyclictest553-21snmpd10:14:250
3152529910199,2cyclictest0-21swapper/012:35:240
3152529910199,2cyclictest0-21swapper/010:59:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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