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2026-06-04 - 03:10

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 04, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16353332132102,9sleep20-21swapper/219:05:252
16356362119105,9sleep50-21swapper/519:09:455
16354492118104,9sleep40-21swapper/419:07:044
16355462117103,9sleep00-21swapper/019:08:280
16354102115101,9sleep30-21swapper/319:06:313
1635628211499,10sleep60-21swapper/619:09:386
1635446211399,9sleep10-21swapper/119:07:011
1635629211196,10sleep70-21swapper/719:09:407
16359049910299,3cyclictest553-21snmpd22:36:416
1635899991020,102cyclictest0-21swapper/523:31:555
1635884991020,100cyclictest0-21swapper/121:21:131
1635884991020,0cyclictest0-21swapper/100:09:381
1635907991010,100cyclictest0-21swapper/722:41:417
1635907991010,100cyclictest0-21swapper/719:53:277
16359049910199,2cyclictest553-21snmpd20:02:156
16359049910198,3cyclictest553-21snmpd21:37:246
1635904991010,100cyclictest0-21swapper/619:53:136
16358999910199,2cyclictest553-21snmpd23:49:195
16358999910199,2cyclictest553-21snmpd20:11:425
16358999910199,2cyclictest553-21snmpd19:49:545
163589999101100,1cyclictest553-21snmpd21:25:275
1635899991010,100cyclictest0-21swapper/522:56:005
1635899991010,100cyclictest0-21swapper/522:25:135
163589799101100,1cyclictest553-21snmpd23:30:564
1635897991010,100cyclictest0-21swapper/419:40:564
16358939910199,2cyclictest553-21snmpd22:10:163
16358939910199,1cyclictest553-21snmpd23:10:153
16358889910199,2cyclictest553-21snmpd00:32:022
16358889910199,1cyclictest553-21snmpd21:05:182
1635888991010,100cyclictest0-21swapper/222:50:292
1635888991010,100cyclictest0-21swapper/221:22:032
16358849910199,2cyclictest553-21snmpd20:22:521
16358849910198,3cyclictest553-21snmpd23:06:061
1635884991010,99cyclictest0-21swapper/100:37:141
1635884991010,101cyclictest0-21swapper/120:58:591
1635884991010,0cyclictest0-21swapper/120:27:521
1635879991010,100cyclictest0-21swapper/023:43:520
1635879991010,100cyclictest0-21swapper/023:11:030
1635879991010,100cyclictest0-21swapper/022:51:210
1635907991000,99cyclictest0-21swapper/721:35:257
1635907991000,99cyclictest0-21swapper/700:21:417
1635907991000,1cyclictest0-21swapper/722:54:097
1635907991000,100cyclictest0-21swapper/723:36:267
1635907991000,100cyclictest0-21swapper/721:21:427
16359049910099,1cyclictest553-21snmpd22:59:066
16359049910099,1cyclictest553-21snmpd22:40:266
16359049910099,1cyclictest553-21snmpd21:22:576
16359049910099,1cyclictest553-21snmpd20:51:426
16359049910099,1cyclictest553-21snmpd00:38:066
16359049910098,2cyclictest553-21snmpd20:14:526
1635904991000,99cyclictest0-21swapper/621:52:376
1635904991000,99cyclictest0-21swapper/619:15:266
1635904991000,100cyclictest0-21swapper/621:45:126
16358999910099,1cyclictest553-21snmpd23:55:445
16358999910099,1cyclictest553-21snmpd20:42:525
16358999910099,1cyclictest553-21snmpd20:15:055
16358999910099,1cyclictest553-21snmpd00:03:235
16358999910099,1cyclictest1664745-21cat20:30:105
16358999910098,2cyclictest553-21snmpd19:19:475
16358999910098,2cyclictest553-21snmpd00:39:515
16358999910097,3cyclictest1836360-21cat23:35:155
1635899991000,99cyclictest0-21swapper/521:30:345
1635899991000,99cyclictest0-21swapper/519:51:495
1635899991000,1cyclictest0-21swapper/523:27:165
16358979910099,1cyclictest553-21snmpd23:37:584
16358979910099,1cyclictest553-21snmpd23:20:304
16358979910099,1cyclictest553-21snmpd23:13:454
16358979910099,1cyclictest553-21snmpd22:55:274
16358979910099,1cyclictest553-21snmpd22:33:384
16358979910099,1cyclictest553-21snmpd22:22:354
16358979910098,2cyclictest553-21snmpd23:56:474
1635897991000,99cyclictest0-21swapper/422:03:074
1635897991000,99cyclictest0-21swapper/421:12:304
1635897991000,99cyclictest0-21swapper/421:12:294
1635897991000,99cyclictest0-21swapper/420:53:474
1635897991000,99cyclictest0-21swapper/420:40:504
1635897991000,100cyclictest0-21swapper/419:50:104
16358939910099,1cyclictest553-21snmpd23:20:153
16358939910099,1cyclictest553-21snmpd22:20:113
16358939910099,1cyclictest553-21snmpd22:15:293
16358939910099,1cyclictest553-21snmpd22:08:013
16358939910099,1cyclictest553-21snmpd22:01:583
16358939910099,1cyclictest553-21snmpd21:52:503
16358939910099,1cyclictest553-21snmpd19:26:473
16358889910099,1cyclictest553-21snmpd22:40:592
1635888991000,99cyclictest0-21swapper/223:37:342
1635888991000,99cyclictest0-21swapper/220:47:472
1635888991000,100cyclictest0-21swapper/222:57:482
1635888991000,100cyclictest0-21swapper/221:36:122
16358849910099,1cyclictest553-21snmpd23:51:551
16358849910099,1cyclictest553-21snmpd23:33:221
1635884991000,99cyclictest0-21swapper/123:16:211
1635884991000,99cyclictest0-21swapper/123:14:541
1635884991000,99cyclictest0-21swapper/121:58:401
1635884991000,100cyclictest0-21swapper/120:30:041
1635884991000,100cyclictest0-21swapper/119:46:061
1635884991000,0cyclictest0-21swapper/120:09:101
16358799910099,1cyclictest553-21snmpd19:59:480
16358799910099,1cyclictest553-21snmpd19:46:570
16358799910099,1cyclictest1747632-21cat22:15:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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