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2026-06-11 - 07:47

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 Thu Jun 11, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18031392129100,9sleep50-21swapper/519:07:375
18032052122107,10sleep60-21swapper/619:08:346
18031522120106,9sleep70-21swapper/719:07:477
1803230211587,10sleep20-21swapper/219:08:542
18032002115101,9sleep10-21swapper/119:08:291
18029872114100,9sleep40-21swapper/419:05:274
1803003211399,9sleep00-21swapper/019:05:400
1803119211298,9sleep30-21swapper/319:07:193
1803530991030,102cyclictest0-21swapper/000:34:160
18035469910299,3cyclictest553-21snmpd20:41:014
180354699102100,2cyclictest553-21snmpd22:30:244
1803546991020,102cyclictest0-21swapper/421:44:374
1803546991020,101cyclictest0-21swapper/423:13:034
18035449910299,3cyclictest553-21snmpd21:40:193
18035309910299,3cyclictest553-21snmpd22:37:360
18035309910299,3cyclictest1830788-21cat20:00:140
18035509910199,2cyclictest553-21snmpd23:43:235
1803550991010,100cyclictest0-21swapper/523:36:475
18035469910199,2cyclictest553-21snmpd23:23:014
18035469910198,3cyclictest553-21snmpd23:44:054
18035469910198,3cyclictest553-21snmpd00:33:014
1803546991010,100cyclictest0-21swapper/400:06:004
1803546991010,0cyclictest0-21swapper/419:58:044
18035449910199,2cyclictest553-21snmpd23:14:283
18035449910199,2cyclictest553-21snmpd22:52:393
180354499101100,1cyclictest553-21snmpd23:06:043
18035399910199,2cyclictest553-21snmpd21:50:222
180353999101100,1cyclictest553-21snmpd22:38:182
1803539991010,100cyclictest1865802-21diskmemload21:19:362
1803539991010,100cyclictest0-21swapper/221:43:102
1803539991010,100cyclictest0-21swapper/220:55:452
18035359910199,2cyclictest553-21snmpd23:20:041
1803535991010,100cyclictest0-21swapper/121:33:581
18035309910199,2cyclictest553-21snmpd22:33:210
18035309910198,3cyclictest553-21snmpd20:53:050
1803558991000,99cyclictest0-21swapper/723:45:147
1803558991000,99cyclictest0-21swapper/722:58:037
1803558991000,99cyclictest0-21swapper/721:51:137
1803558991000,99cyclictest0-21swapper/700:10:337
1803558991000,100cyclictest0-21swapper/721:55:347
1803558991000,100cyclictest0-21swapper/720:02:487
18035549910099,1cyclictest553-21snmpd21:36:126
18035549910099,1cyclictest553-21snmpd20:36:056
18035549910099,1cyclictest1944725-21cat22:20:136
1803554991000,0cyclictest0-21swapper/620:00:016
18035509910099,1cyclictest553-21snmpd20:36:355
18035509910099,1cyclictest553-21snmpd20:31:115
18035509910099,1cyclictest553-21snmpd19:55:575
18035509910099,1cyclictest553-21snmpd00:08:125
18035509910099,1cyclictest2096025-21cat00:35:155
18035509910098,2cyclictest553-21snmpd23:00:465
1803550991000,99cyclictest0-21swapper/521:32:195
1803550991000,100cyclictest0-21swapper/522:46:185
18035469910099,1cyclictest553-21snmpd22:46:514
18035469910099,1cyclictest0-21swapper/400:01:084
18035469910098,2cyclictest553-21snmpd23:31:504
1803546991000,99cyclictest0-21swapper/421:36:314
1803546991000,99cyclictest0-21swapper/421:18:394
18035449910099,1cyclictest553-21snmpd23:33:533
18035449910099,1cyclictest553-21snmpd21:52:343
18035449910099,1cyclictest553-21snmpd20:06:253
18035449910098,2cyclictest553-21snmpd21:17:153
18035449910098,2cyclictest553-21snmpd20:24:323
18035449910098,2cyclictest553-21snmpd00:12:123
18035449910098,1cyclictest553-21snmpd00:31:553
18035449910097,3cyclictest553-21snmpd20:30:353
18035399910099,1cyclictest553-21snmpd23:51:562
18035399910099,1cyclictest553-21snmpd22:06:382
18035399910099,1cyclictest553-21snmpd21:59:342
18035399910099,1cyclictest553-21snmpd20:46:322
18035399910099,1cyclictest553-21snmpd20:01:102
1803539991000,99cyclictest0-21swapper/222:28:242
1803539991000,99cyclictest0-21swapper/200:20:452
1803539991000,99cyclictest0-21swapper/200:20:442
1803539991000,100cyclictest0-21swapper/222:20:132
1803539991000,100cyclictest0-21swapper/222:04:202
1803539991000,100cyclictest0-21swapper/200:07:392
18035359910099,1cyclictest553-21snmpd23:04:431
18035359910099,1cyclictest553-21snmpd22:41:121
18035359910099,1cyclictest553-21snmpd20:44:471
18035359910098,2cyclictest553-21snmpd00:23:421
18035359910098,2cyclictest553-21snmpd00:23:421
18035359910098,1cyclictest553-21snmpd23:08:341
1803535991000,99cyclictest0-21swapper/123:31:591
1803535991000,99cyclictest0-21swapper/122:08:231
1803535991000,99cyclictest0-21swapper/121:57:401
1803535991000,99cyclictest0-21swapper/119:20:291
1803535991000,100cyclictest0-21swapper/122:25:531
1803535991000,100cyclictest0-21swapper/120:49:231
18035309910099,1cyclictest553-21snmpd23:50:160
18035309910099,1cyclictest553-21snmpd23:04:160
18035309910099,1cyclictest553-21snmpd21:03:540
18035309910099,1cyclictest553-21snmpd20:48:440
18035309910099,1cyclictest553-21snmpd20:07:280
18035309910099,1cyclictest1894787-21cat21:35:130
18035309910098,2cyclictest553-21snmpd22:10:230
18035309910098,1cyclictest553-21snmpd20:11:460
18035309910097,3cyclictest553-21snmpd23:13:520
1803530991000,100cyclictest0-21swapper/023:30:380
1803530991000,100cyclictest0-21swapper/022:52:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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