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2026-05-12 - 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 Tue May 12, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1015808998966,19cyclictest311ktimers/212:20:012
101580999793,16cyclictest38-21rcuc/307:55:173
1015806997212,15cyclictest1069616-21apt-get12:25:021
101580699701,29cyclictest0-21swapper/107:10:011
1015806996612,23cyclictest0-21swapper/111:45:011
101580899609,25cyclictest32-21ksoftirqd/211:00:012
1015804995916,40cyclictest1035750-21munin-plugin-st09:05:010
101580699566,18cyclictest0-21swapper/110:25:171
101580499558,20cyclictest14-21rcu_preempt11:20:020
1015808995310,18cyclictest311ktimers/209:15:012
1015806995344,5cyclictest1020364-21munin-plugin-st07:34:591
1015808995143,5cyclictest311ktimers/209:05:202
1015808995141,6cyclictest1027847-21grep08:15:292
1015808995137,9cyclictest1017830-21munin-plugin-st07:20:002
1015804995140,6cyclictest167350irq/118-8000000.ethernet-tx009:40:010
1015804995137,9cyclictest0-21swapper/010:00:000
101580499511,5cyclictest1016834-21memory07:15:020
1015808995043,4cyclictest1067075-21munin-plugin-st12:10:002
1015808995042,5cyclictest1061160-21munin-run11:35:012
101580699501,21cyclictest0-21swapper/109:40:011
1015804995031,16cyclictest167350irq/118-8000000.ethernet-tx010:45:200
1015804995031,13cyclictest131ktimers/007:40:140
101580499502,7cyclictest0-21swapper/011:15:000
101580499502,22cyclictest0-21swapper/012:30:010
1015806994942,5cyclictest0-21swapper/111:15:011
1015806994924,14cyclictest1015800-21cyclictest12:25:121
1015808994840,4cyclictest14-21rcu_preempt11:35:282
1015806994837,7cyclictest1050861-21grep10:30:271
1015806994836,8cyclictest1017181-21munin-node07:15:111
1015806994826,14cyclictest1072006-21/usr/sbin/munin12:35:281
1015806994826,10cyclictest0-21swapper/108:15:141
1015806994730,11cyclictest1033325-21apt-get08:50:171
1015806994728,14cyclictest0-21swapper/109:15:131
1015806994728,13cyclictest0-21swapper/110:10:141
1015806994725,12cyclictest231ktimers/108:45:121
101580699471,17cyclictest24-21ksoftirqd/108:25:001
101580699471,17cyclictest24-21ksoftirqd/108:25:001
101580499471,39cyclictest1015934-21wc07:10:010
101580899464,35cyclictest32-21ksoftirqd/207:25:202
1015808994631,9cyclictest1066152-21grep12:00:292
1015806994632,10cyclictest0-21swapper/108:45:011
1015806994630,5cyclictest0-21swapper/109:05:011
1015806994623,13cyclictest1056658-21/usr/sbin/munin11:05:271
1015806994622,11cyclictest0-21swapper/108:55:131
101580699461,25cyclictest0-21swapper/107:25:201
101580499464,5cyclictest1049273-21latency_hist10:25:010
1015804994638,4cyclictest167350irq/118-8000000.ethernet-tx010:10:130
101580499462,39cyclictest1029352-21phc2sys08:25:250
101580499461,7cyclictest0-21swapper/008:35:000
101580499461,5cyclictest1050706-21ptp4l10:30:270
1015806994527,8cyclictest1020863-21/usr/sbin/munin07:35:251
1015806994526,12cyclictest0-21swapper/111:50:121
1015806994526,12cyclictest0-21swapper/111:25:131
1015806994526,11cyclictest0-21swapper/109:05:101
1015806994523,10cyclictest0-21swapper/110:00:161
1015806994521,12cyclictest0-21swapper/108:10:141
1015804994538,4cyclictest167350irq/118-8000000.ethernet-tx011:45:310
1015804994538,4cyclictest167350irq/118-8000000.ethernet-tx011:35:300
1015804994538,4cyclictest167350irq/118-8000000.ethernet-tx010:00:300
101580499451,12cyclictest0-21swapper/011:30:010
1015808994435,4cyclictest0-21swapper/209:00:212
1015808994431,9cyclictest0-21swapper/208:50:212
1015806994434,6cyclictest0-21swapper/111:15:281
1015806994429,11cyclictest0-21swapper/107:20:141
1015806994426,10cyclictest1029356-21/usr/sbin/munin08:25:271
1015804994431,8cyclictest20850irq/208-8000000.ethernet10:10:000
101580499442,37cyclictest1027985-21grep08:20:010
101580499441,37cyclictest0-21swapper/010:45:000
1015808994336,2cyclictest0-21swapper/207:10:012
1015808994329,10cyclictest311ktimers/212:35:142
1015808994324,13cyclictest311ktimers/209:45:152
1015806994328,10cyclictest0-21swapper/109:30:291
1015806994324,9cyclictest1048963-21/usr/sbin/munin10:20:261
1015806994324,11cyclictest1023705-21/usr/sbin/munin07:50:301
1015806994323,11cyclictest1016193-21/usr/sbin/munin07:10:231
1015804994335,5cyclictest0-21swapper/009:15:240
1015804994333,7cyclictest1044076-21grep09:50:270
1015804994331,7cyclictest0-21swapper/011:05:300
1015804994327,10cyclictest1036526-21grep09:05:290
101580499431,5cyclictest1055960-21grep11:00:300
1015806994228,6cyclictest0-21swapper/108:40:011
1015806994227,10cyclictest0-21swapper/112:30:131
1015806994226,12cyclictest0-21swapper/112:15:121
1015806994226,11cyclictest0-21swapper/110:35:131
1015806994221,13cyclictest1052317-21/usr/sbin/munin10:40:271
1015806994221,12cyclictest0-21swapper/112:05:161
1015804994236,3cyclictest0-21swapper/007:35:000
101580499423,5cyclictest1023004-21cat07:50:000
1015804994235,4cyclictest167350irq/118-8000000.ethernet-tx008:45:030
1015804994234,4cyclictest167350irq/118-8000000.ethernet-tx012:35:210
1015804994234,4cyclictest1054043-21grep10:50:270
1015804994228,10cyclictest0-21swapper/009:30:280
1015804994224,13cyclictest131ktimers/012:10:110
101580499421,38cyclictest0-21swapper/011:45:010
1015808994121,12cyclictest311ktimers/209:25:152
1015808994121,12cyclictest311ktimers/209:25:142
1015806994134,3cyclictest1055373-21apt-get11:00:141
1015806994130,6cyclictest1054218-21grep10:50:291
1015806994127,8cyclictest1048000-21/usr/sbin/munin10:15:231
1015806994126,12cyclictest0-21swapper/109:40:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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