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2026-06-14 - 08:16

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 Sun Jun 14, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30226342121107,9sleep50-21swapper/519:06:085
30228602118104,9sleep70-21swapper/719:09:237
3022644211888,10sleep60-21swapper/619:06:176
30227522117102,10sleep00-21swapper/019:07:480
30225862115101,9sleep40-21swapper/419:05:284
30225852115100,10sleep30-21swapper/319:05:273
3022753211398,10sleep10-21swapper/119:07:491
3022790210893,10sleep20-21swapper/219:08:222
30233299910399,1cyclictest3129786-21kworker/6:222:18:336
30233259910399,4cyclictest553-21snmpd00:34:275
302332999102100,2cyclictest553-21snmpd00:19:096
30233259910299,2cyclictest553-21snmpd00:26:515
3023325991020,101cyclictest0-21swapper/521:36:425
30233299910199,1cyclictest3031592-21kworker/6:121:27:496
30233299910199,1cyclictest3031592-21kworker/6:121:22:076
302332999101100,1cyclictest3313096-21kworker/6:000:39:296
302332999101100,1cyclictest3129786-21kworker/6:223:55:556
302332999101100,1cyclictest3129786-21kworker/6:223:20:196
302332999101100,1cyclictest3129786-21kworker/6:223:15:476
302332999101100,1cyclictest3129786-21kworker/6:222:11:116
302332999101100,1cyclictest3129786-21kworker/6:222:04:056
302332999101100,1cyclictest3129786-21kworker/6:200:27:196
302332999101100,1cyclictest3113131-21kworker/6:021:42:276
3023329991010,100cyclictest0-21swapper/623:40:126
30233259910199,2cyclictest553-21snmpd23:08:105
30233259910199,2cyclictest553-21snmpd20:49:145
30233259910199,2cyclictest553-21snmpd20:49:135
30233259910199,1cyclictest553-21snmpd23:53:325
30233259910198,2cyclictest553-21snmpd22:37:515
3023325991010,101cyclictest0-21swapper/522:47:515
3023325991010,100cyclictest0-21swapper/523:33:555
3023325991010,100cyclictest0-21swapper/519:25:415
3023325991010,0cyclictest0-21swapper/521:27:145
302332399101100,1cyclictest553-21snmpd21:48:134
30233159910199,1cyclictest553-21snmpd22:16:533
30233109910199,2cyclictest553-21snmpd00:39:342
30233059910199,2cyclictest553-21snmpd23:33:491
3023305991010,100cyclictest0-21swapper/122:30:341
30233019910199,2cyclictest553-21snmpd19:57:000
3023334991000,99cyclictest0-21swapper/723:32:497
3023334991000,99cyclictest0-21swapper/723:22:467
3023334991000,99cyclictest0-21swapper/719:30:267
3023334991000,99cyclictest0-21swapper/700:26:097
3023334991000,99cyclictest0-21swapper/700:13:277
3023334991000,100cyclictest0-21swapper/723:05:367
3023334991000,100cyclictest0-21swapper/720:54:327
3023334991000,100cyclictest0-21swapper/720:54:317
30233299910099,1cyclictest3129786-21kworker/6:223:36:456
30233299910099,1cyclictest3129786-21kworker/6:223:27:036
30233299910099,1cyclictest3129786-21kworker/6:223:11:446
30233299910099,1cyclictest3129786-21kworker/6:223:05:196
30233299910099,1cyclictest3129786-21kworker/6:223:00:036
30233299910099,1cyclictest3129786-21kworker/6:222:55:116
30233299910099,1cyclictest3129786-21kworker/6:222:50:076
30233299910099,1cyclictest3129786-21kworker/6:222:49:586
30233299910099,1cyclictest3129786-21kworker/6:222:40:396
30233299910099,1cyclictest3129786-21kworker/6:222:32:456
30233299910099,1cyclictest3129786-21kworker/6:222:08:456
30233299910099,1cyclictest3129786-21kworker/6:221:56:506
30233299910099,1cyclictest3129786-21kworker/6:221:51:296
30233299910099,1cyclictest3129786-21kworker/6:200:30:306
30233299910099,1cyclictest3129786-21kworker/6:200:10:416
30233299910099,1cyclictest3129786-21kworker/6:200:05:086
30233299910099,1cyclictest3129786-21kworker/6:200:01:396
30233299910099,1cyclictest3113131-21kworker/6:021:46:456
30233299910099,1cyclictest3113131-21kworker/6:021:39:036
30233299910099,1cyclictest3058567-21cat20:15:146
30233299910099,1cyclictest3031592-21kworker/6:121:33:226
30233299910099,1cyclictest3031592-21kworker/6:121:15:256
30233299910099,1cyclictest3031592-21kworker/6:120:35:176
30233299910099,1cyclictest3031592-21kworker/6:120:25:126
30233299910099,1cyclictest3031592-21kworker/6:120:10:196
30233299910099,1cyclictest3031592-21kworker/6:119:50:216
30233299910099,1cyclictest3031592-21kworker/6:119:40:116
30233259910099,1cyclictest553-21snmpd23:57:085
30233259910099,1cyclictest553-21snmpd21:10:365
30233259910099,1cyclictest553-21snmpd20:33:135
30233259910099,1cyclictest553-21snmpd19:42:215
30233259910098,2cyclictest553-21snmpd23:41:535
3023325991000,99cyclictest0-21swapper/500:11:235
3023325991000,100cyclictest0-21swapper/523:17:015
3023325991000,100cyclictest0-21swapper/522:17:585
30233239910099,1cyclictest553-21snmpd20:48:564
30233239910099,1cyclictest553-21snmpd20:48:554
30233239910099,1cyclictest553-21snmpd19:50:514
30233239910099,1cyclictest553-21snmpd19:10:534
30233239910099,1cyclictest0-21swapper/420:55:204
30233239910098,2cyclictest553-21snmpd19:16:444
302332399100100,0cyclictest553-21snmpd20:09:494
3023323991000,99cyclictest0-21swapper/421:18:544
3023323991000,100cyclictest0-21swapper/419:56:414
30233159910099,1cyclictest553-21snmpd21:16:543
30233159910099,1cyclictest553-21snmpd20:58:473
30233159910099,1cyclictest553-21snmpd19:32:023
30233159910099,1cyclictest553-21snmpd00:22:023
30233159910099,1cyclictest553-21snmpd00:07:393
30233109910099,1cyclictest553-21snmpd22:19:142
30233109910098,2cyclictest553-21snmpd22:50:362
30233109910098,2cyclictest553-21snmpd00:17:362
3023310991000,99cyclictest0-21swapper/221:46:242
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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