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2026-06-23 - 14:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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 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.

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 rackeslot6s.osadl.org (updated Tue Jun 23, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4120341991081,2cyclictest0-21swapper/020:20:000
4120341998480,2cyclictest0-21swapper/000:05:010
412034699722,41cyclictest0-21swapper/223:05:012
4120346996719,42cyclictest4140554-21/usr/sbin/munin21:05:212
4120346996719,42cyclictest4140554-21/usr/sbin/munin21:05:202
412034199655,10cyclictest4161546-21apt-get23:10:010
412034399644,44cyclictest0-21swapper/121:55:021
4120341996313,27cyclictest4120298-21apt-key19:10:010
4120343996238,12cyclictest0-21swapper/123:15:021
412034399597,24cyclictest0-21swapper/122:10:001
412034399586,15cyclictest0-21swapper/121:30:011
412034199589,10cyclictest20850irq/208-8000000.ethernet19:30:010
412034199565,17cyclictest15-21rcuc/023:35:010
412034399552,26cyclictest0-21swapper/121:20:011
4120346995442,7cyclictest4155524-21grep22:30:292
412034699521,4cyclictest0-21swapper/200:15:202
4120343995219,18cyclictest4120345-21apt-config19:10:011
412034199524,27cyclictest4140264-21apt-get21:05:010
412034199524,27cyclictest4140264-21apt-get21:05:010
412034699501,22cyclictest0-21swapper/222:00:012
4120343995034,11cyclictest0-21swapper/120:40:271
412034699491,25cyclictest0-21swapper/219:50:002
412034399488,12cyclictest22-21rcuc/121:25:021
412034199483,4cyclictest0-21swapper/022:35:280
412034199481,41cyclictest4153286-21latency_hist22:20:020
4120346994734,9cyclictest0-21swapper/219:54:592
412034699471,15cyclictest0-21swapper/222:20:182
412034399471,9cyclictest0-21swapper/123:05:011
4120346994637,6cyclictest4144577-21munin-plugin-st21:30:002
4120346994617,12cyclictest0-21swapper/223:15:012
4120341994638,4cyclictest167350irq/118-8000000.ethernet-tx023:10:180
4120341994631,11cyclictest1283-21cron00:15:000
412034199461,4cyclictest0-21swapper/021:20:010
412034699456,25cyclictest0-21swapper/200:35:002
412034699451,40cyclictest0-21swapper/219:20:002
412034699451,26cyclictest0-21swapper/223:10:012
4120343994534,8cyclictest4162476-21munin-run23:15:001
4120343994531,9cyclictest0-21swapper/120:00:011
412034399451,4cyclictest0-21swapper/120:10:011
412034399451,4cyclictest0-21swapper/120:10:001
412034199452,14cyclictest0-21swapper/000:40:010
412034199451,8cyclictest0-21swapper/021:40:010
4120343994436,4cyclictest231ktimers/123:20:111
4120343994436,4cyclictest231ktimers/123:20:111
412034199445,8cyclictest4133496-21gpg-connect-age20:25:020
4120341994437,4cyclictest167350irq/118-8000000.ethernet-tx023:00:130
4120341994427,15cyclictest0-21swapper/020:30:280
412034199442,5cyclictest4129923-21users20:00:320
412034199441,37cyclictest0-21swapper/000:00:010
4120346994314,12cyclictest30-21rcuc/221:50:012
4120343994331,8cyclictest4155527-21unixbench_multi22:30:291
4120343994330,9cyclictest0-21swapper/123:50:281
412034199437,6cyclictest4124797-21unixbench_singl19:30:270
4120341994327,12cyclictest0-21swapper/021:00:250
412034199432,4cyclictest4131051-21df20:10:170
412034199432,39cyclictest0-21swapper/023:20:270
412034199432,39cyclictest0-21swapper/023:20:270
412034199431,38cyclictest0-21swapper/019:10:030
4120346994232,7cyclictest0-21swapper/220:25:012
4120346994231,7cyclictest4124840-21grep19:30:292
412034699421,22cyclictest0-21swapper/223:00:012
412034399428,27cyclictest0-21swapper/119:25:241
4120343994232,6cyclictest4153954-21munin-run22:25:001
4120343994225,8cyclictest0-21swapper/122:25:261
412034399421,2cyclictest0-21swapper/119:20:011
4120343994210,24cyclictest22-21rcuc/120:50:011
412034199423,5cyclictest4126414-21/usr/sbin/munin19:40:270
412034199423,5cyclictest4126414-21/usr/sbin/munin19:40:270
4120341994232,5cyclictest0-21swapper/019:20:270
4120341994232,5cyclictest0-21swapper/019:20:270
4120341994227,10cyclictest0-21swapper/021:30:010
412034199422,4cyclictest4154330-21perl22:25:180
412034199421,4cyclictest0-21swapper/021:45:010
4120346994133,4cyclictest0-21swapper/223:55:292
4120343994127,9cyclictest0-21swapper/120:50:261
4120343994122,12cyclictest0-21swapper/120:15:281
412034399411,12cyclictest0-21swapper/100:05:011
4120341994135,3cyclictest167350irq/118-8000000.ethernet-tx022:00:110
4120341994134,4cyclictest20650irq/252-8000000.ethernet19:35:140
4120341994133,5cyclictest4149609-21grep21:55:270
412034199413,34cyclictest4152200-21grep22:10:290
4120341994129,8cyclictest0-21swapper/023:45:290
412034199411,36cyclictest0-21swapper/020:40:020
4120346994031,5cyclictest0-21swapper/220:50:012
4120346994026,9cyclictest0-21swapper/219:35:272
412034699401,3cyclictest0-21swapper/222:20:022
4120343994032,4cyclictest0-21swapper/100:30:001
4120343994032,4cyclictest0-21swapper/100:30:001
4120343994031,5cyclictest0-21swapper/123:45:001
4120343994030,6cyclictest0-21swapper/123:25:281
4120343994027,7cyclictest231ktimers/123:10:001
4120341994033,4cyclictest0-21swapper/022:05:020
4120341994032,4cyclictest167350irq/118-8000000.ethernet-tx021:10:260
4120341994025,10cyclictest0-21swapper/023:15:220
412034199402,4cyclictest4144986-21lsblk21:30:190
4120341994013,4cyclictest4137646-21gpgv20:50:010
4120346993928,7cyclictest311ktimers/223:25:112
4120343993930,6cyclictest231ktimers/121:40:011
4120343993928,6cyclictest0-21swapper/120:30:261
4120343993926,8cyclictest0-21swapper/119:30:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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