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2026-05-22 - 08:20

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 Fri May 22, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1025868996628,3cyclictest1070010-21apt-get23:25:120
102586899642,37cyclictest0-21swapper/021:05:000
1025868996413,9cyclictest1047442-21grep21:10:280
102586899631,42cyclictest0-21swapper/023:50:020
1025868996311,10cyclictest1082474-21grep00:35:300
1025868996222,37cyclictest1053001-21/usr/sbin/munin21:45:210
1025868995612,37cyclictest1045056-21ls21:00:000
1025868995514,31cyclictest1039920-21/usr/sbin/munin20:30:100
1025868995514,31cyclictest1039920-21/usr/sbin/munin20:30:100
1025868995418,9cyclictest1061485-21fschecks_time22:35:220
102586899541,49cyclictest1063684-21/usr/sbin/munin22:45:280
102586899541,49cyclictest1063684-21/usr/sbin/munin22:45:280
102586899541,44cyclictest0-21swapper/019:15:000
1025872995337,12cyclictest311ktimers/221:40:112
1025868995335,14cyclictest0-21swapper/022:45:000
1025871995213,21cyclictest1070007-21/usr/sbin/munin23:25:191
1025868995241,7cyclictest0-21swapper/023:05:290
1025868995232,11cyclictest0-21swapper/020:20:170
1025868995223,4cyclictest1059668-21/usr/sbin/munin22:25:160
1025872995143,4cyclictest1069718-21munin-plugin-st23:25:012
1025872995138,9cyclictest1283-21cron00:30:002
1025872995137,10cyclictest311ktimers/200:15:112
1025872995136,10cyclictest0-21swapper/219:15:002
102587199517,5cyclictest0-21swapper/119:20:021
1025868995042,5cyclictest1035502-21munin-plugin-st20:05:000
102586899502,43cyclictest1042260-21grep20:40:270
1025868995015,3cyclictest1079940-21apt-get00:25:020
1025868995012,34cyclictest1043924-21grep20:50:280
1025868995012,34cyclictest1043924-21grep20:50:280
1025872994935,9cyclictest0-21swapper/222:15:002
102586899493,40cyclictest1080757-21unixbench_multi00:25:300
1025868994823,23cyclictest1078815-21/usr/sbin/munin00:15:260
1025868994814,29cyclictest1073078-21unixbench_multi23:40:280
1025871994732,10cyclictest0-21swapper/100:00:311
102586899476,38cyclictest1068633-21cut23:15:270
1025868994731,11cyclictest131ktimers/019:40:110
1025868994731,11cyclictest131ktimers/019:40:110
1025868994729,3cyclictest0-21swapper/021:35:020
1025868994714,8cyclictest1063913-21apt-get22:50:110
1025868994710,34cyclictest1049965-21unixbench_singl21:25:290
102587199469,14cyclictest22-21rcuc/119:45:011
102587199469,14cyclictest22-21rcuc/119:45:011
102587199461,9cyclictest0-21swapper/100:20:011
102586899469,8cyclictest1079842-21sed00:20:290
102586899468,3cyclictest1030329-21cron19:35:010
102586899468,3cyclictest1030329-21cron19:35:000
102587299456,19cyclictest1061923-21apt-get22:40:022
1025872994527,14cyclictest311ktimers/221:05:122
102586899455,5cyclictest1036677-21tune2fs20:10:180
1025868994510,4cyclictest0-21swapper/022:05:140
1025872994433,7cyclictest0-21swapper/220:40:272
1025872994422,14cyclictest311ktimers/200:10:132
1025872994420,13cyclictest311ktimers/219:25:112
102586899446,35cyclictest1030610-21/usr/sbin/munin19:35:170
102586899446,32cyclictest0-21swapper/023:15:010
1025868994434,5cyclictest0-21swapper/023:45:190
1025868994434,5cyclictest0-21swapper/023:45:190
1025868994428,11cyclictest0-21swapper/000:05:130
1025868994417,3cyclictest1069141-21df_inode23:20:170
1025868994417,3cyclictest1051998-21diskstats21:40:170
1025868994416,25cyclictest1034635-21cron20:00:000
1025868994415,27cyclictest1058831-21ssh22:20:160
1025868994414,3cyclictest1041477-21cron20:40:000
1025868994414,24cyclictest1057613-21latency_hist22:15:020
102586899441,41cyclictest0-21swapper/022:30:140
1025872994328,11cyclictest311ktimers/220:10:132
1025872994326,13cyclictest311ktimers/219:45:132
102587299431,17cyclictest0-21swapper/221:15:172
1025871994334,5cyclictest1067068-21unixbench_multi23:05:281
102586899432,4cyclictest1028928-21df_inode19:25:180
1025872994229,9cyclictest0-21swapper/223:45:272
1025872994229,9cyclictest0-21swapper/223:45:272
1025871994227,11cyclictest0-21swapper/123:55:281
102587199421,3cyclictest0-21swapper/100:15:011
1025868994235,4cyclictest167350irq/118-8000000.ethernet-tx000:30:160
1025868994234,5cyclictest0-21swapper/020:15:260
1025868994228,10cyclictest0-21swapper/021:50:140
1025868994228,10cyclictest0-21swapper/021:50:140
102586899422,38cyclictest0-21swapper/000:10:140
1025868994214,26cyclictest1046312-21/usr/sbin/munin21:05:250
102586899421,39cyclictest0-21swapper/023:55:180
102587299414,21cyclictest30-21rcuc/220:50:002
1025872994123,14cyclictest311ktimers/222:00:112
1025871994126,12cyclictest0-21swapper/100:30:301
102586899419,28cyclictest1064910-21sh22:55:220
1025868994134,4cyclictest167350irq/118-8000000.ethernet-tx021:35:200
1025868994134,4cyclictest167350irq/118-8000000.ethernet-tx021:35:190
102586899413,34cyclictest1028119-21sh19:20:320
1025868994127,11cyclictest1033617-21/usr/sbin/munin19:50:250
1025868994113,3cyclictest1071758-21diskstats23:35:170
1025872994026,9cyclictest0-21swapper/223:35:012
1025872994022,14cyclictest0-21swapper/219:20:002
1025871994026,10cyclictest0-21swapper/120:25:271
1025871994024,9cyclictest0-21swapper/119:35:201
1025871994013,13cyclictest1025865-21cyclictest19:55:011
1025868994034,4cyclictest0-21swapper/020:45:250
102586899401,8cyclictest1048475-21latency_hist21:20:010
102586899401,22cyclictest0-21swapper/022:20:020
1025872993930,5cyclictest0-21swapper/222:45:192
1025872993930,5cyclictest0-21swapper/222:45:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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