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2026-06-17 - 09:48

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 Wed Jun 17, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
329972128114,9sleep50-21swapper/519:07:545
328542121106,10sleep20-21swapper/219:05:492
330972120106,9sleep40-21swapper/419:09:214
331142115100,10sleep30-21swapper/319:09:353
33001211499,10sleep00-21swapper/019:07:570
32952211399,9sleep70-21swapper/719:07:167
33142211297,10sleep10-21swapper/119:09:581
32998211298,9sleep60-21swapper/619:07:556
3338299104100,4cyclictest553-21snmpd21:18:131
333829910399,3cyclictest553-21snmpd23:15:231
33382991030,100cyclictest0-21swapper/119:10:151
334029910299,3cyclictest553-21snmpd22:22:336
334029910299,3cyclictest553-21snmpd00:22:066
33402991020,100cyclictest0-21swapper/623:31:346
33402991020,100cyclictest0-21swapper/621:39:446
33399991020,99cyclictest0-21swapper/500:14:345
3339499102100,2cyclictest553-21snmpd22:41:404
333829910299,3cyclictest553-21snmpd21:06:211
33405991010,101cyclictest0-21swapper/720:29:417
33405991010,100cyclictest0-21swapper/722:56:107
33405991010,100cyclictest0-21swapper/700:11:547
33405991010,0cyclictest0-21swapper/722:29:187
33405991010,0cyclictest0-21swapper/721:30:197
334029910199,2cyclictest553-21snmpd21:45:286
334029910199,2cyclictest553-21snmpd20:24:206
334029910199,2cyclictest553-21snmpd00:30:076
33402991010,100cyclictest0-21swapper/623:18:146
33402991010,100cyclictest0-21swapper/600:16:556
33399991010,101cyclictest0-21swapper/522:05:305
33399991010,101cyclictest0-21swapper/521:20:195
333949910199,2cyclictest553-21snmpd00:10:354
3339499101100,1cyclictest553-21snmpd21:54:384
33394991010,99cyclictest0-21swapper/421:49:234
333909910199,2cyclictest553-21snmpd22:44:163
333909910199,2cyclictest553-21snmpd19:23:393
333909910199,2cyclictest553-21snmpd00:37:363
333909910198,3cyclictest553-21snmpd20:20:163
33386991010,100cyclictest0-21swapper/222:39:072
333829910199,2cyclictest553-21snmpd23:52:061
333829910198,3cyclictest553-21snmpd20:00:131
33382991010,100cyclictest0-21swapper/122:55:151
33378991010,100cyclictest0-21swapper/000:09:140
33405991000,99cyclictest0-21swapper/720:22:177
33405991000,99cyclictest0-21swapper/719:13:157
33405991000,100cyclictest0-21swapper/723:14:017
33405991000,100cyclictest0-21swapper/721:50:107
33405991000,100cyclictest0-21swapper/721:46:557
334029910099,1cyclictest553-21snmpd22:37:416
334029910099,1cyclictest553-21snmpd22:04:246
334029910099,1cyclictest1880257-21ntpd22:41:226
334029910098,2cyclictest553-21snmpd19:41:196
33402991000,100cyclictest0-21swapper/623:23:116
333999910099,1cyclictest553-21snmpd22:52:345
333999910099,1cyclictest553-21snmpd22:25:155
333999910099,1cyclictest553-21snmpd20:42:575
333999910099,1cyclictest553-21snmpd20:38:095
333999910099,1cyclictest553-21snmpd20:20:525
333999910099,1cyclictest553-21snmpd19:45:375
333999910099,1cyclictest1880257-21ntpd22:56:235
333999910099,1cyclictest1880257-21ntpd00:31:235
333999910098,2cyclictest553-21snmpd20:47:215
33399991000,99cyclictest0-21swapper/520:18:235
33399991000,99cyclictest0-21swapper/519:35:155
33399991000,99cyclictest0-21swapper/519:35:145
33399991000,99cyclictest0-21swapper/500:09:275
33399991000,100cyclictest0-21swapper/523:16:205
33399991000,100cyclictest0-21swapper/523:10:075
33399991000,100cyclictest0-21swapper/521:15:365
33399991000,100cyclictest0-21swapper/521:07:255
333949910099,1cyclictest553-21snmpd22:38:364
333949910099,1cyclictest553-21snmpd21:57:444
333949910099,1cyclictest553-21snmpd21:32:264
333949910099,1cyclictest553-21snmpd19:43:074
333949910099,1cyclictest553-21snmpd00:35:584
333949910098,2cyclictest553-21snmpd22:51:014
33394991000,99cyclictest0-21swapper/422:15:484
33394991000,99cyclictest0-21swapper/422:10:594
33394991000,99cyclictest0-21swapper/421:16:214
33394991000,1cyclictest0-21swapper/423:50:154
33394991000,100cyclictest0-21swapper/422:20:274
333909910099,1cyclictest553-21snmpd23:45:323
333909910099,1cyclictest553-21snmpd23:45:323
333909910099,1cyclictest553-21snmpd20:14:203
333909910099,1cyclictest553-21snmpd19:52:423
333909910099,1cyclictest553-21snmpd19:47:493
333909910099,1cyclictest553-21snmpd00:21:103
333909910099,1cyclictest553-21snmpd00:16:063
333909910099,1cyclictest553-21snmpd00:12:473
333869910099,1cyclictest553-21snmpd23:52:392
333869910099,1cyclictest553-21snmpd23:39:382
333869910099,1cyclictest553-21snmpd23:10:162
333869910099,1cyclictest553-21snmpd22:16:122
33386991000,99cyclictest0-21swapper/222:59:182
33386991000,99cyclictest0-21swapper/219:40:312
33386991000,100cyclictest0-21swapper/221:51:022
333829910099,1cyclictest553-21snmpd23:58:421
333829910099,1cyclictest553-21snmpd22:54:211
333829910099,1cyclictest553-21snmpd21:42:561
333829910099,1cyclictest553-21snmpd21:02:211
333829910099,1cyclictest553-21snmpd00:13:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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