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2026-09-07 - 13:25

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 Sep 07, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4016161996711,16cyclictest4045556-21apt-get22:00:021
401615899654,52cyclictest0-21swapper/020:35:010
4016161996013,24cyclictest231ktimers/120:50:021
401616299572,23cyclictest0-21swapper/222:40:012
4016158995621,33cyclictest4059160-21cat23:20:000
4016158995621,33cyclictest4059160-21cat23:19:590
401615899561,12cyclictest0-21swapper/019:15:010
4016162995345,4cyclictest4020629-21munin-plugin-st19:35:012
4016162995345,4cyclictest4020629-21munin-plugin-st19:35:002
4016161995145,4cyclictest231ktimers/120:30:001
4016161995032,11cyclictest231ktimers/122:20:141
4016158995027,20cyclictest20650irq/252-8000000.ethernet21:05:390
4016158995027,20cyclictest20650irq/252-8000000.ethernet21:05:390
4016161994931,12cyclictest231ktimers/121:50:151
4016158994942,4cyclictest167350irq/118-8000000.ethernet-tx019:15:160
4016161994839,5cyclictest4018843-21kthreadd19:20:271
4016161994830,9cyclictest0-21swapper/123:10:011
4016161994830,9cyclictest0-21swapper/123:10:001
4016161994825,12cyclictest231ktimers/120:10:131
4016158994840,3cyclictest0-21swapper/022:10:140
401615899482,22cyclictest0-21swapper/019:30:000
401616299477,22cyclictest0-21swapper/222:50:012
4016162994734,6cyclictest4062547-21grep23:35:282
4016162994733,9cyclictest0-21swapper/220:10:292
4016161994738,5cyclictest4047254-21grep22:05:291
4016161994736,7cyclictest4037952-21grep21:15:011
4016158994739,4cyclictest167350irq/118-8000000.ethernet-tx022:15:290
401615899473,41cyclictest0-21swapper/020:25:280
4016158994731,14cyclictest167350irq/118-8000000.ethernet-tx021:45:200
4016162994641,3cyclictest311ktimers/223:50:012
4016162994637,5cyclictest4040504-21munin-plugin-st21:30:002
4016162994630,10cyclictest0-21swapper/220:05:212
401616299462,13cyclictest0-21swapper/219:55:012
4016162994620,14cyclictest0-21swapper/222:55:102
4016158994640,3cyclictest20650irq/252-8000000.ethernet00:05:250
4016158994637,5cyclictest4021397-21grep19:35:290
4016162994535,6cyclictest4071093-21munin-plugin-st00:30:002
4016162994532,10cyclictest311ktimers/219:15:122
4016158994538,4cyclictest167350irq/118-8000000.ethernet-tx023:20:240
4016158994537,4cyclictest167350irq/118-8000000.ethernet-tx021:20:230
401615899453,16cyclictest4033644-21rm20:50:010
4016158994529,11cyclictest131ktimers/023:25:120
4016158994529,11cyclictest131ktimers/023:25:120
4016158994528,14cyclictest167350irq/118-8000000.ethernet-tx022:55:200
401615899451,40cyclictest4063848-21sh23:45:200
4016162994429,7cyclictest4016881-21grep19:10:302
4016162994428,9cyclictest0-21swapper/200:00:222
4016158994438,3cyclictest20650irq/252-8000000.ethernet00:30:000
4016158994437,4cyclictest20650irq/252-8000000.ethernet23:10:250
4016158994436,4cyclictest167350irq/118-8000000.ethernet-tx000:10:170
4016158994435,5cyclictest4065914-21grep23:55:290
4016162994334,5cyclictest0-21swapper/221:20:282
4016162994331,6cyclictest4054943-21munin-plugin-st22:55:002
401615899439,29cyclictest4054964-21latency_hist22:55:010
4016158994337,3cyclictest20650irq/252-8000000.ethernet23:40:130
4016158994336,4cyclictest4031773-21cron20:40:000
401615899431,6cyclictest4024851-21munin-run19:59:590
401615899431,4cyclictest4025132-21df_inode20:00:180
401615899431,40cyclictest0-21swapper/023:50:210
401615899431,37cyclictest4020810-21date19:35:020
401615899431,37cyclictest4020810-21date19:35:020
4016162994233,6cyclictest4065163-21apt23:55:002
4016162994232,5cyclictest0-21swapper/222:00:282
4016161994225,10cyclictest4030052-21grep20:25:271
4016161994218,13cyclictest231ktimers/119:10:221
4016158994238,2cyclictest0-21swapper/022:40:120
4016158994236,3cyclictest167350irq/118-8000000.ethernet-tx019:40:150
4016158994234,6cyclictest0-21swapper/023:05:140
4016158994234,6cyclictest0-21swapper/023:05:140
4016158994234,4cyclictest167350irq/118-8000000.ethernet-tx022:45:290
401615899422,6cyclictest4032065-21df_inode20:40:170
401615899421,38cyclictest0-21swapper/022:00:000
4016162994132,5cyclictest0-21swapper/221:50:322
4016162994131,6cyclictest4047299-21grep22:05:292
4016162994130,7cyclictest4019751-21grep19:25:292
4016162994130,6cyclictest0-21swapper/220:40:282
4016162994130,5cyclictest4031730-21grep20:35:292
4016162994130,4cyclictest0-21swapper/219:35:202
4016162994129,8cyclictest4028207-21grep20:15:282
4016162994124,11cyclictest0-21swapper/222:15:202
4016161994129,5cyclictest0-21swapper/119:35:291
4016161994116,11cyclictest231ktimers/123:10:171
401616199411,5cyclictest0-21swapper/122:50:011
401616199411,31cyclictest4056615-21kworker/u8:0+rpciod00:04:261
401615899414,8cyclictest0-21swapper/022:35:010
401615899412,3cyclictest4018363-21df19:20:140
401615899412,37cyclictest0-21swapper/021:40:200
4016162994030,6cyclictest4065953-21grep23:55:302
4016162994030,5cyclictest0-21swapper/200:19:592
4016161994031,4cyclictest4031669-21unixbench_multi20:35:291
4016161994024,8cyclictest0-21swapper/121:15:211
401616199401,8cyclictest0-21swapper/123:35:011
4016158994033,4cyclictest0-21swapper/023:35:250
4016158994031,5cyclictest0-21swapper/019:50:290
401615899401,2cyclictest0-21swapper/021:55:010
4016162993927,8cyclictest0-21swapper/221:00:282
4016161993930,5cyclictest0-21swapper/123:25:221
4016161993930,5cyclictest0-21swapper/123:25:221
4016161993929,7cyclictest4025589-21grep20:00:301
4016161993923,12cyclictest231ktimers/119:40:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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