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2026-05-03 - 10:43

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 May 03, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16214472121106,10sleep10-21swapper/119:06:291
16215382119105,9sleep70-21swapper/719:07:467
16216452118103,10sleep20-21swapper/219:09:192
16214792117104,8sleep60-21swapper/619:06:576
16195752115102,8sleep50-21swapper/519:05:055
1621679211499,10sleep00-21swapper/019:09:480
1621499211499,10sleep40-21swapper/419:07:124
16207862114100,9sleep30-21swapper/319:05:193
1621939991063,100cyclictest31-21ksoftirqd/221:18:262
16219509910395,3cyclictest0-21swapper/521:24:565
1621950991030,103cyclictest0-21swapper/500:10:145
1621931991030,100cyclictest0-21swapper/000:35:550
1621959991020,100cyclictest0-21swapper/700:29:257
1621950991020,100cyclictest0-21swapper/521:08:505
162193999102101,1cyclictest31-21ksoftirqd/221:49:062
1621959991010,99cyclictest0-21swapper/720:33:097
1621959991010,101cyclictest0-21swapper/723:05:187
1621959991010,101cyclictest0-21swapper/700:31:227
1621959991010,100cyclictest0-21swapper/721:55:217
16219549910199,2cyclictest1812874-21kworker/6:023:13:096
16219549910199,2cyclictest1812874-21kworker/6:000:09:536
16219549910199,2cyclictest1796051-21kworker/6:222:50:566
16219549910199,2cyclictest1660995-21kworker/6:121:53:406
162195499101100,1cyclictest1812874-21kworker/6:023:57:276
162195499101100,1cyclictest1812874-21kworker/6:023:40:146
162195499101100,1cyclictest1812874-21kworker/6:023:26:126
162195499101100,1cyclictest1812874-21kworker/6:000:35:586
162195499101100,1cyclictest1812874-21kworker/6:000:27:416
162195499101100,1cyclictest1812874-21kworker/6:000:22:586
162195499101100,1cyclictest1812874-21kworker/6:000:03:036
162195499101100,1cyclictest1796051-21kworker/6:223:02:396
162195499101100,1cyclictest1660995-21kworker/6:122:41:436
162195499101100,1cyclictest1660995-21kworker/6:122:35:256
162195499101100,1cyclictest1660995-21kworker/6:122:22:326
162195499101100,1cyclictest1660995-21kworker/6:122:19:056
162195499101100,1cyclictest1660995-21kworker/6:122:14:096
162195499101100,1cyclictest1660995-21kworker/6:122:03:586
162195499101100,1cyclictest1660995-21kworker/6:121:49:066
162195499101100,1cyclictest1660995-21kworker/6:121:27:406
162195499101100,1cyclictest1660995-21kworker/6:121:16:436
162195499101100,1cyclictest1660995-21kworker/6:120:45:136
162195499101100,1cyclictest1611004-21kworker/6:219:10:156
16219509910199,2cyclictest553-21snmpd23:15:245
16219509910199,2cyclictest553-21snmpd21:59:485
16219509910199,1cyclictest553-21snmpd23:09:135
1621950991010,101cyclictest0-21swapper/523:56:565
1621950991010,101cyclictest0-21swapper/521:00:155
16219469910199,2cyclictest553-21snmpd23:49:104
16219469910199,2cyclictest553-21snmpd20:25:124
16219469910199,1cyclictest553-21snmpd00:05:264
1621946991010,100cyclictest0-21swapper/421:52:334
1621946991010,100cyclictest0-21swapper/420:07:134
16219429910199,2cyclictest553-21snmpd20:40:343
16219429910198,3cyclictest553-21snmpd20:37:043
162194299101100,1cyclictest553-21snmpd23:08:113
162193999101100,1cyclictest1778977-21kworker/2:223:20:452
162193999101100,1cyclictest1648060-21kworker/2:021:54:432
16219359910199,2cyclictest553-21snmpd21:48:101
16219359910199,1cyclictest553-21snmpd21:43:111
16219359910199,1cyclictest553-21snmpd19:35:451
1621935991010,100cyclictest0-21swapper/123:33:241
1621935991010,100cyclictest0-21swapper/119:11:581
1621935991010,100cyclictest0-21swapper/100:26:051
162193199101100,1cyclictest553-21snmpd20:59:230
1621959991000,99cyclictest0-21swapper/721:16:247
1621959991000,100cyclictest0-21swapper/722:30:107
1621959991000,100cyclictest0-21swapper/722:07:317
1621959991000,100cyclictest0-21swapper/719:30:317
16219549910099,1cyclictest1812874-21kworker/6:023:50:006
16219549910099,1cyclictest1812874-21kworker/6:023:45:246
16219549910099,1cyclictest1812874-21kworker/6:023:35:416
16219549910099,1cyclictest1812874-21kworker/6:023:30:116
16219549910099,1cyclictest1812874-21kworker/6:023:20:086
16219549910099,1cyclictest1812874-21kworker/6:023:15:046
16219549910099,1cyclictest1812874-21kworker/6:023:05:116
16219549910099,1cyclictest1812874-21kworker/6:000:30:116
16219549910099,1cyclictest1812874-21kworker/6:000:16:226
16219549910099,1cyclictest1812874-21kworker/6:000:10:006
16219549910099,1cyclictest1796051-21kworker/6:222:55:186
16219549910099,1cyclictest1660995-21kworker/6:122:45:156
16219549910099,1cyclictest1660995-21kworker/6:122:30:066
16219549910099,1cyclictest1660995-21kworker/6:122:25:526
16219549910099,1cyclictest1660995-21kworker/6:122:05:016
16219549910099,1cyclictest1660995-21kworker/6:121:55:086
16219549910099,1cyclictest1660995-21kworker/6:121:40:316
16219549910099,1cyclictest1660995-21kworker/6:121:35:196
16219549910099,1cyclictest1660995-21kworker/6:121:30:356
16219549910099,1cyclictest1660995-21kworker/6:121:20:026
16219549910099,1cyclictest1660995-21kworker/6:121:10:036
16219549910099,1cyclictest1660995-21kworker/6:121:05:156
16219549910099,1cyclictest1660995-21kworker/6:121:00:186
16219549910099,1cyclictest1660995-21kworker/6:120:50:136
16219549910099,1cyclictest1660995-21kworker/6:120:35:126
16219549910099,1cyclictest1611004-21kworker/6:220:10:156
16219549910099,1cyclictest1611004-21kworker/6:220:05:186
16219549910099,1cyclictest1611004-21kworker/6:220:00:186
16219549910099,1cyclictest1611004-21kworker/6:219:40:216
16219549910099,1cyclictest1611004-21kworker/6:219:35:166
16219549910099,1cyclictest1611004-21kworker/6:219:30:186
16219549910099,1cyclictest1611004-21kworker/6:219:25:016
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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