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2026-03-24 - 22:38

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 Mar 24, 2026 12:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31359912137122,10sleep60-21swapper/607:08:176
31359402119105,9sleep00-21swapper/007:07:310
31360102118103,10sleep50-21swapper/507:08:315
31360642117103,9sleep30-21swapper/307:09:173
31360502115100,10sleep70-21swapper/707:09:067
3135942211499,10sleep20-21swapper/207:07:322
31359352114100,9sleep40-21swapper/407:07:264
31358022114100,9sleep10-21swapper/107:05:321
31363579910499,4cyclictest553-21snmpd10:45:092
31363629910299,3cyclictest553-21snmpd07:28:153
313635799102100,2cyclictest553-21snmpd11:58:192
3136357991020,101cyclictest0-21swapper/209:30:322
31363539910299,2cyclictest553-21snmpd11:50:131
31363539910299,2cyclictest553-21snmpd11:35:471
3136353991020,100cyclictest0-21swapper/110:42:001
31363489910299,3cyclictest3232085-21cat09:40:150
3136348991020,102cyclictest0-21swapper/010:14:170
3136376991010,101cyclictest0-21swapper/712:15:117
3136376991010,101cyclictest0-21swapper/712:15:107
3136376991010,101cyclictest0-21swapper/708:15:197
3136376991010,101cyclictest0-21swapper/708:15:197
3136376991010,0cyclictest0-21swapper/712:08:167
31363739910199,2cyclictest553-21snmpd11:05:056
3136373991010,100cyclictest0-21swapper/611:19:336
3136373991010,100cyclictest0-21swapper/609:20:156
31363689910199,2cyclictest553-21snmpd10:13:455
3136368991010,100cyclictest0-21swapper/509:37:535
31363669910198,2cyclictest553-21snmpd12:16:104
31363669910198,2cyclictest553-21snmpd12:16:104
313636699101100,1cyclictest553-21snmpd09:42:084
3136366991010,100cyclictest0-21swapper/412:24:224
3136366991010,100cyclictest0-21swapper/409:31:174
3136366991010,100cyclictest0-21swapper/408:48:394
31363629910199,2cyclictest553-21snmpd07:23:333
31363629910198,3cyclictest553-21snmpd11:42:383
31363579910199,2cyclictest553-21snmpd10:56:322
31363579910199,2cyclictest3145950-21cat07:25:142
3136357991010,100cyclictest0-21swapper/212:39:162
3136357991010,100cyclictest0-21swapper/209:59:182
31363539910199,2cyclictest553-21snmpd09:43:521
31363539910199,1cyclictest553-21snmpd09:53:511
31363489910199,2cyclictest553-21snmpd08:35:420
31363489910199,2cyclictest553-21snmpd07:11:330
3136348991010,101cyclictest0-21swapper/010:40:090
31363769910098,2cyclictest0-21swapper/707:22:447
3136376991000,99cyclictest0-21swapper/712:00:367
3136376991000,99cyclictest0-21swapper/708:54:397
3136376991000,99cyclictest0-21swapper/708:13:527
3136376991000,99cyclictest0-21swapper/707:40:467
3136376991000,100cyclictest0-21swapper/712:26:317
3136376991000,100cyclictest0-21swapper/710:59:107
3136376991000,100cyclictest0-21swapper/708:41:027
31363739910099,1cyclictest553-21snmpd12:36:506
31363739910099,1cyclictest553-21snmpd08:50:246
31363739910099,1cyclictest553-21snmpd08:38:356
31363739910099,1cyclictest553-21snmpd08:19:086
31363739910099,1cyclictest553-21snmpd08:19:076
31363739910099,1cyclictest553-21snmpd08:10:166
31363739910099,1cyclictest553-21snmpd07:48:576
31363739910099,1cyclictest553-21snmpd07:34:216
31363739910099,1cyclictest3158555-21cat07:50:146
31363739910098,2cyclictest553-21snmpd09:10:136
31363739910098,1cyclictest605-21lldpd12:12:416
3136373991000,99cyclictest0-21swapper/609:04:486
3136373991000,100cyclictest0-21swapper/608:29:516
31363689910099,1cyclictest553-21snmpd12:17:075
31363689910099,1cyclictest553-21snmpd12:17:075
31363689910099,1cyclictest553-21snmpd11:29:295
31363689910099,1cyclictest553-21snmpd10:27:515
31363689910099,1cyclictest553-21snmpd09:19:555
31363689910099,1cyclictest553-21snmpd08:20:415
31363689910099,1cyclictest553-21snmpd08:20:415
31363689910099,1cyclictest3352767-21cat11:30:155
31363689910098,2cyclictest553-21snmpd10:09:125
3136368991000,99cyclictest0-21swapper/511:23:025
3136368991000,99cyclictest0-21swapper/511:01:435
3136368991000,100cyclictest3294342-21ssh10:36:075
31363669910099,1cyclictest553-21snmpd12:08:014
31363669910099,1cyclictest553-21snmpd10:32:464
31363669910099,1cyclictest553-21snmpd08:57:204
31363669910098,2cyclictest3418673-21cat12:30:154
3136366991000,99cyclictest0-21swapper/411:46:214
3136366991000,99cyclictest0-21swapper/411:18:414
3136366991000,99cyclictest0-21swapper/408:26:344
3136366991000,1cyclictest0-21swapper/408:50:164
3136366991000,100cyclictest0-21swapper/409:35:114
3136366991000,100cyclictest0-21swapper/408:30:114
31363629910099,1cyclictest553-21snmpd12:01:433
31363629910099,1cyclictest553-21snmpd10:40:303
31363629910099,1cyclictest553-21snmpd09:05:373
31363629910099,1cyclictest553-21snmpd08:38:063
31363629910099,1cyclictest553-21snmpd07:19:333
31363629910099,0cyclictest553-21snmpd09:20:543
31363629910098,2cyclictest553-21snmpd10:05:483
31363629910098,1cyclictest553-21snmpd11:24:383
31363629910098,1cyclictest553-21snmpd07:39:123
31363629910097,3cyclictest553-21snmpd10:00:333
31363579910099,1cyclictest553-21snmpd10:39:222
31363579910099,1cyclictest553-21snmpd10:03:302
31363579910099,1cyclictest553-21snmpd08:47:472
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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