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2026-05-27 - 06:06

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 May 27, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38441622123111,8sleep40-21swapper/419:08:574
38441592121107,9sleep10-21swapper/119:08:541
38439872120105,10sleep60-21swapper/619:06:256
38439272120104,10sleep20-21swapper/219:05:342
38440352118102,10sleep70-21swapper/719:07:067
38441902117103,9sleep50-21swapper/519:09:215
3844170211498,10sleep30-21swapper/319:09:043
3844158211197,9sleep00-21swapper/019:08:520
38444839910299,3cyclictest553-21snmpd23:26:516
38444799910299,2cyclictest553-21snmpd19:45:155
38444689910299,3cyclictest553-21snmpd20:09:102
38444689910299,2cyclictest0-21swapper/221:28:392
384446099102100,2cyclictest553-21snmpd23:40:570
38444839910199,2cyclictest553-21snmpd22:02:116
38444839910198,2cyclictest553-21snmpd21:36:166
3844483991010,101cyclictest0-21swapper/619:46:406
38444799910199,2cyclictest553-21snmpd23:39:415
38444799910199,2cyclictest553-21snmpd22:10:425
38444799910199,2cyclictest553-21snmpd21:36:105
38444799910199,1cyclictest553-21snmpd22:56:385
38444779910198,3cyclictest553-21snmpd19:27:294
3844477991010,0cyclictest0-21swapper/423:06:224
38444729910199,2cyclictest553-21snmpd23:37:143
38444729910199,2cyclictest553-21snmpd22:09:303
38444689910199,2cyclictest553-21snmpd20:03:592
38444689910199,2cyclictest553-21snmpd19:24:532
3844468991010,99cyclictest3906730-21diskmemload23:43:332
3844468991010,101cyclictest0-21swapper/223:04:402
3844468991010,101cyclictest0-21swapper/220:12:222
3844468991010,100cyclictest0-21swapper/222:47:432
3844468991010,100cyclictest0-21swapper/219:10:132
38444609910199,2cyclictest553-21snmpd23:11:260
384446099101100,1cyclictest553-21snmpd21:14:520
3844460991010,100cyclictest0-21swapper/023:24:110
3844487991000,99cyclictest0-21swapper/700:32:137
3844487991000,99cyclictest0-21swapper/700:23:027
3844487991000,100cyclictest0-21swapper/722:09:297
3844487991000,100cyclictest0-21swapper/721:29:077
38444839910099,1cyclictest553-21snmpd23:51:196
38444839910099,1cyclictest553-21snmpd23:11:136
38444839910099,1cyclictest553-21snmpd22:46:516
38444839910099,1cyclictest553-21snmpd22:44:486
38444839910099,1cyclictest0-21swapper/622:52:546
38444839910098,2cyclictest553-21snmpd20:54:476
38444839910097,3cyclictest553-21snmpd23:40:206
38444839910097,3cyclictest553-21snmpd19:52:066
38444839910097,3cyclictest3861328-21cat19:40:156
384448399100100,0cyclictest553-21snmpd23:49:136
3844483991000,99cyclictest0-21swapper/619:25:026
3844483991000,100cyclictest0-21swapper/623:56:426
3844483991000,100cyclictest0-21swapper/621:40:496
3844483991000,100cyclictest0-21swapper/619:15:146
3844483991000,100cyclictest0-21swapper/600:22:076
38444799910099,1cyclictest553-21snmpd23:49:585
38444799910099,1cyclictest553-21snmpd23:05:405
38444799910099,1cyclictest553-21snmpd21:43:235
38444799910098,2cyclictest553-21snmpd23:11:225
38444799910098,2cyclictest0-21swapper/519:23:235
3844479991001,99cyclictest0-21swapper/522:01:325
3844479991000,99cyclictest0-21swapper/521:46:025
3844479991000,100cyclictest0-21swapper/522:41:305
3844479991000,100cyclictest0-21swapper/520:20:155
38444779910099,1cyclictest553-21snmpd22:27:214
38444779910099,1cyclictest553-21snmpd21:18:584
38444779910097,3cyclictest553-21snmpd21:39:254
3844477991000,99cyclictest0-21swapper/421:41:234
3844477991000,99cyclictest0-21swapper/421:09:304
3844477991000,99cyclictest0-21swapper/400:10:344
3844477991000,98cyclictest0-21swapper/420:24:504
3844477991000,100cyclictest0-21swapper/419:39:134
38444729910099,1cyclictest553-21snmpd21:29:063
38444729910099,1cyclictest553-21snmpd20:47:213
38444729910099,1cyclictest553-21snmpd20:09:583
38444729910099,1cyclictest553-21snmpd19:33:073
38444689910099,1cyclictest553-21snmpd22:52:462
38444689910099,1cyclictest553-21snmpd00:16:552
3844468991000,99cyclictest0-21swapper/223:24:392
3844468991000,99cyclictest0-21swapper/220:18:082
3844468991000,99cyclictest0-21swapper/219:40:062
3844468991000,99cyclictest0-21swapper/219:16:292
3844468991000,100cyclictest0-21swapper/223:19:052
3844468991000,100cyclictest0-21swapper/222:37:312
3844468991000,100cyclictest0-21swapper/222:37:302
3844468991000,100cyclictest0-21swapper/221:13:582
3844468991000,100cyclictest0-21swapper/219:28:002
3844468991000,100cyclictest0-21swapper/200:03:222
38444639910099,1cyclictest553-21snmpd23:34:501
38444639910099,1cyclictest553-21snmpd22:40:061
38444639910099,1cyclictest553-21snmpd19:23:121
38444639910099,1cyclictest3935823-21cat21:35:161
3844463991000,99cyclictest0-21swapper/123:48:061
3844463991000,99cyclictest0-21swapper/100:12:121
3844463991000,99cyclictest0-21swapper/100:07:161
3844463991000,100cyclictest0-21swapper/121:30:271
38444609910099,1cyclictest553-21snmpd22:15:120
38444609910099,1cyclictest553-21snmpd19:39:120
38444609910099,1cyclictest553-21snmpd19:19:380
38444609910099,1cyclictest553-21snmpd00:33:430
38444609910099,1cyclictest553-21snmpd00:17:160
384448799990,99cyclictest0-21swapper/723:36:207
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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