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2026-07-27 - 23:31

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 Mon Jul 27, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1017354997837,35cyclictest0-21swapper/107:15:181
1017352997041,26cyclictest1026987-21munin-plugin-st08:05:000
1017352997037,9cyclictest1049955-21sendmail10:19:590
1017354996925,6cyclictest0-21swapper/112:20:221
1017354996911,18cyclictest1065525-21/usr/sbin/munin11:50:211
1017352996940,4cyclictest1048179-21munin-plugin-st10:10:000
101735299691,63cyclictest0-21swapper/010:20:100
1017354996721,8cyclictest0-21swapper/109:45:221
1017354996624,6cyclictest0-21swapper/111:25:211
1017354996623,9cyclictest0-21swapper/109:10:291
101735499625,33cyclictest1018253-21munin-node07:15:011
1017354996122,9cyclictest0-21swapper/107:50:171
101735299612,45cyclictest0-21swapper/007:45:140
101735299612,45cyclictest0-21swapper/007:45:140
101735599582,15cyclictest1064830-21cut11:45:202
101735599582,15cyclictest1064830-21cut11:45:202
101735599571,7cyclictest0-21swapper/212:15:022
1017355995342,6cyclictest1028664-21munin-run08:15:002
1017355995342,6cyclictest1028664-21munin-run08:15:002
1017355995133,11cyclictest0-21swapper/211:25:292
1017355995037,9cyclictest1283-21cron08:45:002
1017355995028,15cyclictest311ktimers/209:35:112
1017355994933,11cyclictest311ktimers/209:20:152
101735599488,9cyclictest1063540-21apt-get11:40:022
1017355994832,12cyclictest311ktimers/208:20:112
1017355994827,15cyclictest311ktimers/211:50:162
1017355994734,5cyclictest0-21swapper/211:55:312
1017355994733,8cyclictest0-21swapper/209:15:312
1017355994733,8cyclictest0-21swapper/209:15:312
1017355994732,9cyclictest0-21swapper/208:05:012
1017354994723,12cyclictest0-21swapper/108:00:001
1017352994735,8cyclictest0-21swapper/011:25:000
101735299471,44cyclictest1057816-21df11:05:180
1017355994630,11cyclictest311ktimers/207:45:152
1017355994630,11cyclictest311ktimers/207:45:142
1017354994629,11cyclictest0-21swapper/110:30:211
1017352994640,5cyclictest0-21swapper/008:45:150
1017352994630,12cyclictest1022667-21sendmail07:40:010
1017355994531,8cyclictest0-21swapper/207:25:302
1017355994531,7cyclictest1047297-21grep10:00:302
1017354994525,9cyclictest0-21swapper/111:40:301
1017352994536,6cyclictest1032011-21grep08:30:290
1017352994526,14cyclictest131ktimers/012:05:130
1017355994422,13cyclictest0-21swapper/209:50:012
1017354994433,8cyclictest0-21swapper/112:10:281
1017354994423,11cyclictest0-21swapper/109:15:311
1017354994423,11cyclictest0-21swapper/109:15:301
1017354994423,10cyclictest1072118-21grep12:25:291
1017352994429,11cyclictest0-21swapper/010:00:300
101735299441,4cyclictest0-21swapper/007:15:010
101735299441,40cyclictest0-21swapper/009:15:010
1017355994328,8cyclictest0-21swapper/212:30:192
1017355994326,11cyclictest0-21swapper/207:15:212
101735499436,20cyclictest1031406-21/usr/sbin/munin08:30:181
1017354994329,8cyclictest0-21swapper/111:30:291
101735499432,26cyclictest0-21swapper/111:40:021
1017352994336,4cyclictest1025289-21munin-plugin-st07:54:590
1017352994329,11cyclictest20850irq/208-8000000.ethernet12:35:300
101735299432,5cyclictest1033744-21munin-run08:44:590
101735299431,4cyclictest1064564-21latency_hist11:45:000
101735299431,3cyclictest0-21swapper/012:05:010
101735299431,36cyclictest0-21swapper/011:05:020
1017355994227,8cyclictest0-21swapper/210:30:292
1017354994231,7cyclictest0-21swapper/110:44:591
101735499421,2cyclictest0-21swapper/110:50:001
1017352994235,4cyclictest20850irq/208-8000000.ethernet09:15:200
1017352994235,4cyclictest20850irq/208-8000000.ethernet09:15:200
101735299421,4cyclictest0-21swapper/010:00:010
101735299421,39cyclictest0-21swapper/009:25:200
1017355994133,5cyclictest1045643-21munin-plugin-st09:55:002
1017355994130,5cyclictest0-21swapper/208:25:202
1017354994129,7cyclictest0-21swapper/109:55:281
1017354994126,10cyclictest0-21swapper/111:05:301
1017352994126,12cyclictest0-21swapper/012:25:290
101735299411,4cyclictest1032690-21/usr/sbin/munin08:35:270
101735299411,4cyclictest1032690-21/usr/sbin/munin08:35:270
1017355994030,6cyclictest0-21swapper/212:00:292
1017355994027,6cyclictest0-21swapper/211:30:222
1017355994025,10cyclictest0-21swapper/209:55:182
1017355994021,12cyclictest311ktimers/212:35:112
101735599401,2cyclictest0-21swapper/210:50:012
1017354994030,5cyclictest0-21swapper/112:10:001
1017354994025,9cyclictest0-21swapper/110:05:291
101735499401,2cyclictest0-21swapper/112:05:021
1017352994033,4cyclictest20850irq/208-8000000.ethernet11:55:220
1017352994033,4cyclictest20850irq/208-8000000.ethernet08:00:000
1017352994031,5cyclictest1042059-21grep09:30:300
1017352994030,7cyclictest0-21swapper/011:40:000
1017352994026,10cyclictest0-21swapper/009:35:210
101735299401,36cyclictest0-21swapper/007:15:190
1017355993932,4cyclictest1022660-21sh07:40:002
1017355993927,6cyclictest0-21swapper/207:10:302
1017355993926,7cyclictest0-21swapper/209:30:302
1017355993926,6cyclictest0-21swapper/208:10:012
1017355993925,9cyclictest0-21swapper/209:40:292
1017354993928,7cyclictest0-21swapper/107:40:291
1017354993927,9cyclictest0-21swapper/108:10:311
1017354993927,9cyclictest0-21swapper/108:10:311
1017354993927,8cyclictest0-21swapper/108:55:301
1017354993926,8cyclictest0-21swapper/112:30:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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