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2026-05-22 - 13:41

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 792 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
1025872993930,5cyclictest0-21swapper/221:40:002
1025872993930,5cyclictest0-21swapper/221:40:002
1025872993929,7cyclictest1075709-21sendmail00:00:002
1025872993921,13cyclictest311ktimers/222:05:122
1025872993914,14cyclictest311ktimers/221:55:122
1025872993911,14cyclictest30-21rcuc/221:05:002
1025871993929,6cyclictest0-21swapper/121:00:291
102586899398,7cyclictest1039775-21cat20:30:000
1025868993932,4cyclictest167350irq/118-8000000.ethernet-tx023:00:240
1025868993924,10cyclictest0-21swapper/022:00:270
1025868993923,13cyclictest1049070-21/usr/sbin/munin21:20:280
1025872993831,5cyclictest311ktimers/221:30:122
1025872993826,8cyclictest0-21swapper/220:55:272
1025872993825,9cyclictest0-21swapper/222:25:282
1025872993824,10cyclictest0-21swapper/200:00:202
1025871993828,6cyclictest0-21swapper/122:25:281
1025871993828,5cyclictest0-21swapper/122:35:291
1025871993826,8cyclictest1028606-21grep19:20:411
102586899387,26cyclictest0-21swapper/019:45:040
1025868993829,4cyclictest0-21swapper/000:00:200
1025868993825,10cyclictest1070842-21sshd23:30:060
102586899381,35cyclictest0-21swapper/019:15:160
1025872993730,4cyclictest0-21swapper/221:25:212
1025872993729,5cyclictest1079943-21munin-plugin-st00:25:002
1025872993729,5cyclictest1079943-21munin-plugin-st00:25:002
1025872993725,8cyclictest1030871-21phc2sys19:35:242
1025872993724,8cyclictest0-21swapper/223:25:302
1025872993724,10cyclictest311ktimers/220:35:122
1025871993722,6cyclictest1032948-21kworker/u8:1+rpciod20:16:171
102587199371,4cyclictest0-21swapper/121:25:021
1025868993721,13cyclictest1036183-21/usr/sbin/munin20:05:270
1025868993721,13cyclictest1036183-21/usr/sbin/munin20:05:260
1025872993626,7cyclictest0-21swapper/223:35:282
1025872993625,7cyclictest0-21swapper/222:50:282
1025872993625,6cyclictest1081727-21munin-plugin-st00:34:592
1025872993621,11cyclictest311ktimers/220:25:142
1025871993627,5cyclictest0-21swapper/122:15:281
1025871993627,4cyclictest167450irq/126-8000000.ethernet-tx121:35:291
1025871993627,4cyclictest167450irq/126-8000000.ethernet-tx121:35:291
1025871993626,6cyclictest0-21swapper/120:20:261
1025871993625,5cyclictest1057865-21latency_hist22:15:011
1025871993621,10cyclictest0-21swapper/120:35:181
102587199361,2cyclictest0-21swapper/121:35:001
1025868993619,15cyclictest1054898-21/usr/sbin/munin21:55:290
1025872993526,5cyclictest1028549-21grep19:20:412
1025872993525,5cyclictest1034572-21grep19:55:292
1025872993525,5cyclictest0-21swapper/221:45:282
1025872993524,7cyclictest30-21rcuc/219:40:242
1025872993524,7cyclictest30-21rcuc/219:40:232
1025872993523,8cyclictest0-21swapper/220:05:272
1025872993523,8cyclictest0-21swapper/220:05:272
102587299351,10cyclictest0-21swapper/219:55:012
102587199355,2cyclictest0-21swapper/122:10:021
102587199354,20cyclictest1028858-21/usr/sbin/munin19:25:191
1025871993523,8cyclictest0-21swapper/119:35:001
1025871993523,8cyclictest0-21swapper/119:35:001
1025871993521,9cyclictest0-21swapper/123:20:261
1025871993519,10cyclictest0-21swapper/120:05:181
1025871993519,10cyclictest0-21swapper/120:05:181
1025872993426,4cyclictest0-21swapper/222:15:282
1025872993415,13cyclictest311ktimers/223:10:102
102587299341,28cyclictest0-21swapper/200:05:172
102587299340,13cyclictest1048549-21/usr/sbin/munin21:20:182
102587199348,9cyclictest1660-21snmpd23:50:011
102587199348,9cyclictest1660-21snmpd23:50:011
102587199343,15cyclictest1034860-21/usr/sbin/munin20:00:181
1025871993426,4cyclictest0-21swapper/100:05:281
1025871993425,4cyclictest0-21swapper/122:30:201
1025871993424,6cyclictest0-21swapper/119:10:291
1025871993421,9cyclictest0-21swapper/100:20:301
1025871993421,9cyclictest0-21swapper/100:20:301
102587199341,4cyclictest0-21swapper/121:20:011
1025872993323,7cyclictest0-21swapper/219:30:292
1025872993323,7cyclictest0-21swapper/219:30:292
1025872993323,5cyclictest0-21swapper/223:05:012
1025872993318,12cyclictest311ktimers/222:20:112
102587299331,5cyclictest0-21swapper/221:15:022
1025871993326,4cyclictest1064508-21unixbench_singl22:50:291
1025871993324,4cyclictest1032854-21unixbench_multi19:45:291
1025871993322,7cyclictest0-21swapper/123:00:281
102587199331,2cyclictest0-21swapper/123:40:021
102587199331,2cyclictest0-21swapper/122:50:021
102587199331,2cyclictest0-21swapper/122:50:021
1025872993223,5cyclictest0-21swapper/223:40:252
1025872993222,7cyclictest1062763-21grep22:40:282
1025872993220,9cyclictest311ktimers/222:55:152
102587299321,29cyclictest0-21swapper/223:15:222
102587299321,26cyclictest0-21swapper/222:30:182
1025871993224,4cyclictest0-21swapper/123:10:261
1025868993220,8cyclictest1025881-21latency_hist19:10:010
1025868993220,8cyclictest1025881-21latency_hist19:10:010
1025872993122,6cyclictest0-21swapper/220:30:282
1025872993122,6cyclictest0-21swapper/220:30:272
1025872993120,8cyclictest0-21swapper/220:15:212
102587199319,15cyclictest1072542-21/usr/sbin/munin23:40:191
1025871993123,5cyclictest0-21swapper/122:55:291
1025871993120,8cyclictest0-21swapper/122:20:191
1025871993120,7cyclictest0-21swapper/120:55:271
1025871993119,8cyclictest0-21swapper/123:35:021
1025871993119,8cyclictest0-21swapper/122:00:191
102587199311,27cyclictest1043913-21unixbench_multi20:50:271
102587199311,27cyclictest1043913-21unixbench_multi20:50:271
1025872993022,5cyclictest0-21swapper/200:35:262
1025871993022,4cyclictest0-21swapper/122:40:271
1025871993022,4cyclictest0-21swapper/120:10:181
1025871993018,9cyclictest0-21swapper/123:50:281
1025872992919,7cyclictest0-21swapper/220:20:272
1025872992917,8cyclictest1035493-21cron20:05:002
1025871992924,3cyclictest14-21rcu_preempt21:50:011
1025871992923,3cyclictest0-21swapper/121:55:281
1025871992922,4cyclictest0-21swapper/120:40:281
1025871992917,7cyclictest0-21swapper/100:25:221
102587199291,22cyclictest0-21swapper/123:15:061
1025871992821,4cyclictest0-21swapper/100:40:001
1025871992820,6cyclictest1046550-21unixbench_multi21:05:291
1025871992820,5cyclictest0-21swapper/121:30:021
1025871992820,5cyclictest0-21swapper/121:10:281
102587299278,14cyclictest311ktimers/223:50:122
1025872992717,8cyclictest311ktimers/220:50:102
1025872992717,8cyclictest311ktimers/220:50:102
1025871992716,7cyclictest0-21swapper/121:50:291
1025871992716,7cyclictest0-21swapper/121:50:291
1025872992618,5cyclictest0-21swapper/223:10:002
1025871992621,3cyclictest0-21swapper/120:45:071
1025871992616,8cyclictest231ktimers/119:55:131
1025872992517,6cyclictest0-21swapper/221:50:212
1025872992517,6cyclictest0-21swapper/221:50:212
1025871992517,5cyclictest0-21swapper/120:34:211
1025871992517,5cyclictest0-21swapper/120:34:211
102587199244,10cyclictest0-21swapper/119:10:011
102587199244,10cyclictest0-21swapper/119:10:011
102587199241,20cyclictest0-21swapper/121:43:221
102587299215,12cyclictest0-21swapper/219:10:022
102587299215,12cyclictest0-21swapper/219:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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