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2025-12-23 - 01:10

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 Dec 22, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1990156997815,11cyclictest2044790-21/usr/sbin/munin12:30:222
1990156997815,11cyclictest2044790-21/usr/sbin/munin12:30:222
1990152997641,5cyclictest2031595-21munin-plugin-st11:10:010
199015299754,4cyclictest1660-21snmpd12:30:300
199015299754,4cyclictest1660-21snmpd12:30:300
199015299667,8cyclictest0-21swapper/008:00:010
199015599643,36cyclictest2011046-21cmp09:10:001
199015599596,13cyclictest2027194-21apt-get10:45:031
1990155995434,13cyclictest0-21swapper/110:05:011
1990152995419,14cyclictest14-21rcu_preempt11:50:010
1990156995316,30cyclictest0-21swapper/210:00:282
199015299535,12cyclictest1990976-21munin-node07:15:020
1990156995111,9cyclictest2030810-21gpgv11:05:012
199015599516,17cyclictest231ktimers/112:30:001
199015599515,33cyclictest22-21rcuc/108:55:201
1990155995136,10cyclictest0-21swapper/108:05:011
1990155995130,14cyclictest231ktimers/109:30:121
199015299518,7cyclictest0-21swapper/011:15:010
199015299518,7cyclictest0-21swapper/011:15:010
1990155995040,6cyclictest1992946-21munin-plugin-st07:25:001
1990152995043,4cyclictest167350irq/118-8000000.ethernet-tx007:40:000
1990152995034,12cyclictest0-21swapper/010:20:150
1990152995033,10cyclictest0-21swapper/008:55:300
199015299502,4cyclictest2002246-21grep08:15:290
199015299501,44cyclictest2029716-21tail10:55:310
1990156994814,27cyclictest2014361-21unixbench_singl09:25:292
199015599482,18cyclictest22-21rcuc/108:45:021
1990155994812,29cyclictest0-21swapper/108:20:001
199015299481,41cyclictest2016102-21latency_hist09:40:020
1990156994733,9cyclictest0-21swapper/210:55:302
1990152994741,4cyclictest2011881-21munin-plugin-st09:15:000
1990152994739,5cyclictest2001478-21munin-plugin-st08:15:000
1990152994730,14cyclictest167350irq/118-8000000.ethernet-tx011:30:240
199015299472,4cyclictest1993182-21grep07:25:170
199015699469,30cyclictest2013519-21unixbench_singl09:20:302
1990156994612,29cyclictest311ktimers/207:30:202
199015699461,20cyclictest0-21swapper/209:50:012
199015599469,19cyclictest2005234-21/usr/sbin/munin08:35:221
1990155994630,12cyclictest0-21swapper/112:15:291
199015599462,9cyclictest0-21swapper/112:00:011
199015599462,21cyclictest24-21ksoftirqd/110:25:011
199015299468,5cyclictest2004946-21apt-get08:35:020
1990152994638,4cyclictest167350irq/118-8000000.ethernet-tx010:10:110
199015299461,43cyclictest0-21swapper/010:00:120
1990156994532,9cyclictest2002339-21sendmail08:20:002
1990155994530,9cyclictest0-21swapper/110:10:271
1990155994528,9cyclictest0-21swapper/111:20:251
1990152994539,4cyclictest0-21swapper/012:25:120
1990152994531,7cyclictest15-21rcuc/007:55:010
1990152994531,7cyclictest15-21rcuc/007:55:010
199015699447,2cyclictest0-21swapper/207:20:012
1990156994432,6cyclictest0-21swapper/209:15:282
1990155994435,6cyclictest2025500-21munin-plugin-st10:35:001
1990155994434,6cyclictest2034917-21unixbench_singl11:25:281
1990155994431,6cyclictest2023767-21grep10:20:311
1990155994427,9cyclictest0-21swapper/110:45:301
1990155994427,11cyclictest0-21swapper/109:50:261
1990155994427,11cyclictest0-21swapper/109:50:261
1990152994435,4cyclictest0-21swapper/007:40:280
199015299442,6cyclictest2045692-21df12:35:190
1990156994337,4cyclictest2040120-21cron12:00:002
1990156994325,14cyclictest311ktimers/207:55:122
1990155994337,4cyclictest14-21rcu_preempt12:20:261
1990155994334,6cyclictest231ktimers/111:15:191
1990155994328,9cyclictest0-21swapper/112:10:281
199015299438,2cyclictest0-21swapper/012:20:250
199015299431,40cyclictest0-21swapper/009:05:270
1990156994235,4cyclictest2022117-21munin-plugin-st10:15:002
199015699423,30cyclictest30-21rcuc/209:35:252
1990156994226,9cyclictest0-21swapper/209:05:252
1990156994222,15cyclictest0-21swapper/210:45:282
1990155994231,6cyclictest231ktimers/111:40:131
1990152994235,4cyclictest167350irq/118-8000000.ethernet-tx010:25:260
199015299423,4cyclictest1999137-21diskstats08:00:190
1990152994228,9cyclictest0-21swapper/011:40:200
1990156994128,9cyclictest0-21swapper/207:25:002
1990156994128,8cyclictest0-21swapper/211:40:292
1990155994128,9cyclictest0-21swapper/112:30:311
1990155994128,9cyclictest0-21swapper/112:30:311
1990155994127,9cyclictest2014313-21grep09:25:291
1990152994134,4cyclictest0-21swapper/009:25:190
1990152994120,19cyclictest0-21swapper/012:10:230
199015299411,4cyclictest2005537-21meminfo08:35:270
199015299411,4cyclictest0-21swapper/009:45:010
1990156994030,7cyclictest2032317-21grep11:10:302
1990156994030,7cyclictest2032317-21grep11:10:302
1990156994025,8cyclictest1990856-21grep07:10:302
1990155994030,5cyclictest0-21swapper/107:40:001
1990155994026,11cyclictest2007772-21/usr/sbin/munin08:50:201
1990155994022,9cyclictest24-21ksoftirqd/109:10:011
1990152994035,2cyclictest0-21swapper/010:50:210
1990152994033,4cyclictest167350irq/118-8000000.ethernet-tx008:45:000
1990152994033,4cyclictest167350irq/118-8000000.ethernet-tx007:30:130
1990152994030,4cyclictest20650irq/252-8000000.ethernet08:20:120
1990152994029,8cyclictest0-21swapper/010:40:300
1990152994025,9cyclictest0-21swapper/011:35:300
1990156993928,7cyclictest0-21swapper/210:05:292
1990156993926,8cyclictest0-21swapper/209:55:292
1990156993925,9cyclictest0-21swapper/208:10:292
1990156993925,10cyclictest0-21swapper/212:35:282
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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