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2026-08-11 - 08:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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 here to display the system's profile data or here to proceed to next system.
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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Tue Aug 11, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17068211488,20sleep00-21swapper/019:06:200
17124211295,12sleep20-21swapper/219:07:022
17320211094,11sleep30-21swapper/319:09:353
17143210988,15sleep10-21swapper/119:07:171
88292710,0sleep10-21swapper/123:27:411
243342650,0sleep00-21swapper/022:38:260
18772570,0sleep00-21swapper/021:43:260
40562560,1sleep00-21swapper/023:23:030
103812550,1sleep00-21swapper/000:01:230
17381993717,18cyclictest0-21swapper/022:15:120
33002270,1sleep10-21swapper/121:45:121
17383992516,8cyclictest0-21swapper/222:15:122
1738299250,23cyclictest0-21swapper/100:20:021
1738499230,22cyclictest0-21swapper/300:20:043
1738199232,5cyclictest0-21swapper/020:55:000
17382992219,2cyclictest14640-21kworker/u8:123:39:041
1738299221,3cyclictest10875-21ssh22:25:121
1738199220,2cyclictest0-21swapper/022:00:120
1738399211,2cyclictest18334-21ssh22:00:122
1738399211,19cyclictest0-21swapper/220:50:122
17381992110,2cyclictest0-21swapper/020:30:140
1738199210,2cyclictest0-21swapper/022:54:140
1738499200,2cyclictest0-21swapper/322:25:123
1738499200,2cyclictest0-21swapper/319:15:133
1738499200,18cyclictest0-21swapper/322:45:143
1738299200,2cyclictest0-21swapper/119:15:131
1738199200,18cyclictest0-21swapper/023:46:280
1738199200,11cyclictest0-21swapper/023:09:190
1738199200,11cyclictest0-21swapper/022:41:090
73922190,1sleep20-21swapper/221:49:022
17383991916,2cyclictest8878-21kworker/u8:121:18:052
17382991916,2cyclictest14640-21kworker/u8:123:48:041
17382991916,2cyclictest11741-21kworker/u8:023:06:011
1738199198,3cyclictest0-21swapper/022:30:110
1738199190,2cyclictest596-21diskmemload00:33:100
1738199190,2cyclictest0-21swapper/021:16:580
1738199190,2cyclictest0-21swapper/021:12:390
1738199190,18cyclictest0-21swapper/023:33:380
1738199190,11cyclictest0-21swapper/021:23:150
1738199190,11cyclictest0-21swapper/000:19:490
1738199190,10cyclictest0-21swapper/023:01:150
17384991815,2cyclictest0-21swapper/320:10:113
17383991815,2cyclictest30873-21kworker/u8:122:29:042
17383991815,2cyclictest17125-21kworker/u8:123:22:012
1738399180,2cyclictest6032-21ssh22:52:042
1738299180,11cyclictest0-21swapper/123:20:041
1738199182,7cyclictest0-21swapper/019:44:020
1738199181,7cyclictest0-21swapper/019:39:580
1738199181,6cyclictest596-21diskmemload21:30:200
1738199181,6cyclictest0-21swapper/023:55:510
17381991810,2cyclictest0-21swapper/023:42:270
17381991810,2cyclictest0-21swapper/000:23:210
1738199180,2cyclictest0-21swapper/021:56:110
1738199180,12cyclictest0-21swapper/022:48:380
1738199180,11cyclictest596-21diskmemload00:12:350
1738199180,11cyclictest0-21swapper/022:13:320
1738199180,10cyclictest0-21swapper/023:13:580
17383991714,2cyclictest32560-21kworker/u8:023:53:042
17383991714,2cyclictest20909-21kworker/u8:122:49:042
17383991713,2cyclictest13171-21ssh00:05:162
17383991713,2cyclictest0-21swapper/223:45:132
17383991712,3cyclictest0-21swapper/221:00:162
1738199179,2cyclictest0-21swapper/021:26:150
1738199179,2cyclictest0-21swapper/000:07:210
1738199178,2cyclictest0-21swapper/000:36:130
1738199172,6cyclictest0-21swapper/020:22:590
17381991711,5cyclictest0-21swapper/020:55:280
1738199170,8cyclictest0-21swapper/020:00:190
1738199170,2cyclictest0-21swapper/023:51:140
1738199170,2cyclictest0-21swapper/023:25:340
1738199170,2cyclictest0-21swapper/023:15:300
1738199170,11cyclictest0-21swapper/022:21:510
1738199170,11cyclictest0-21swapper/020:05:200
1738199170,10cyclictest0-21swapper/022:56:250
1738199170,10cyclictest0-21swapper/022:56:250
17383991613,2cyclictest30873-21kworker/u8:122:08:052
1738399161,13cyclictest28191-21ssh23:15:142
1738299161,3cyclictest0-21swapper/122:20:141
17382991613,2cyclictest826-21kworker/u8:023:32:041
17382991613,2cyclictest26659-21kworker/u8:000:19:031
17382991613,2cyclictest14699-21kworker/u8:100:13:041
1738299160,2cyclictest0-21swapper/100:05:041
1738199160,6cyclictest0-21swapper/020:50:000
1738199160,6cyclictest0-21swapper/020:35:090
17384991510,3cyclictest0-21swapper/300:15:153
1738499150,3cyclictest0-21swapper/323:30:143
17383991512,2cyclictest5693-21kworker/u8:200:32:012
17383991512,2cyclictest16042-21kworker/u8:221:37:042
17383991512,2cyclictest14640-21kworker/u8:123:40:042
17383991512,2cyclictest12387-21kworker/u8:221:58:042
1738399150,2cyclictest0-21swapper/221:32:052
1738399150,13cyclictest0-21swapper/222:30:162
1738299151,3cyclictest0-21swapper/121:28:131
17382991512,2cyclictest22844-21kworker/u8:223:19:041
17382991512,2cyclictest20909-21kworker/u8:122:55:041
17382991512,2cyclictest20909-21kworker/u8:122:55:041
17382991512,2cyclictest20909-21kworker/u8:122:48:041
17382991512,2cyclictest20909-21kworker/u8:122:37:041
1738299150,2cyclictest0-21swapper/100:35:591
1738299150,1cyclictest0-21swapper/122:52:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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