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2026-08-03 - 06:03

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 Aug 03, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2564580991031,2cyclictest0-21swapper/000:20:010
256458099901,2cyclictest0-21swapper/023:00:010
256458099841,2cyclictest0-21swapper/020:10:010
256458399771,39cyclictest0-21swapper/121:15:011
2564580997637,33cyclictest2608770-21phc2sys23:25:260
2564580997028,34cyclictest0-21swapper/019:30:300
2564580997028,34cyclictest0-21swapper/019:30:300
256458099682,59cyclictest0-21swapper/020:25:270
2564585996616,16cyclictest2592299-21/usr/sbin/munin21:50:192
256458099662,37cyclictest0-21swapper/000:05:010
256458099642,31cyclictest2566794-21/usr/sbin/munin19:20:240
256458099632,53cyclictest2600845-21apt-get22:40:150
2564580996321,30cyclictest20850irq/208-8000000.ethernet19:10:020
2564583996217,11cyclictest2581150-21/usr/sbin/munin20:45:201
2564580996231,28cyclictest20650irq/252-8000000.ethernet21:30:300
256458099621,2cyclictest0-21swapper/020:55:010
256458099611,58cyclictest2569668-21pluginstate19:35:240
256458099601,5cyclictest0-21swapper/022:30:190
256458099601,56cyclictest2610523-21ptp4l23:35:270
256458099601,55cyclictest2597412-21latency_hist22:20:010
256458099601,55cyclictest2597412-21latency_hist22:20:010
256458099601,52cyclictest2592302-21apt-get21:50:160
256458099601,49cyclictest0-21swapper/020:20:010
256458099601,3cyclictest0-21swapper/000:10:200
256458099601,21cyclictest2604290-21diskstats23:00:190
2564580995924,30cyclictest0-21swapper/022:20:160
256458099592,28cyclictest2591655-21lsblk21:45:220
256458099591,56cyclictest0-21swapper/000:35:200
256458099591,56cyclictest0-21swapper/000:35:200
256458099591,4cyclictest2618026-21/usr/sbin/munin00:20:210
256458099591,4cyclictest0-21swapper/023:40:110
256458099591,4cyclictest0-21swapper/021:10:230
256458099591,3cyclictest0-21swapper/021:40:220
256458099591,3cyclictest0-21swapper/021:40:220
256458099591,2cyclictest0-21swapper/019:15:220
256458099591,28cyclictest2612537-21sort23:50:010
256458099591,28cyclictest2612537-21sort23:50:010
2564580995824,31cyclictest2609364-21fschecks_count23:30:190
256458099581,2cyclictest2598308-21apt-get22:25:150
2564580995721,32cyclictest2583132-21memory20:55:270
256458099571,3cyclictest2581142-21latency_hist20:45:010
256458099571,2cyclictest0-21swapper/020:00:020
256458599568,41cyclictest30-21rcuc/221:15:012
256458099562,50cyclictest2599987-21apt-get22:35:160
256458099562,26cyclictest0-21swapper/023:10:280
2564580995529,24cyclictest20850irq/208-8000000.ethernet21:35:220
256458099551,3cyclictest0-21swapper/023:15:240
256458099543,46cyclictest2614090-21grep23:55:290
256458099543,46cyclictest2614090-21grep23:55:280
256458099542,4cyclictest2565638-21cut19:15:020
256458099541,50cyclictest0-21swapper/021:25:310
256458099541,49cyclictest2570175-21apt-get19:40:140
2564585995311,7cyclictest2614127-21apt-get00:00:012
256458099532,28cyclictest2613361-21latency_hist23:55:010
2564580995318,31cyclictest2595415-21grep22:05:300
256458099531,4cyclictest0-21swapper/000:25:550
256458099531,2cyclictest0-21swapper/020:15:010
2564583995241,6cyclictest2578367-21grep20:25:301
2564580995226,22cyclictest20650irq/252-8000000.ethernet19:45:280
256458099519,38cyclictest2587783-21grep21:20:290
2564580995140,8cyclictest2580102-21sendmail20:40:000
2564580995126,20cyclictest0-21swapper/020:20:190
256458099512,46cyclictest0-21swapper/020:30:260
256458099511,4cyclictest0-21swapper/019:25:220
256458099511,47cyclictest2594481-21sendmail_mailtr22:00:280
256458099511,46cyclictest2586986-21latency_hist21:20:010
256458099511,3cyclictest0-21swapper/022:50:260
2564585995036,9cyclictest2591806-21phc2sys-jitter21:45:272
256458099502,43cyclictest0-21swapper/023:10:010
256458099502,43cyclictest0-21swapper/023:10:010
2564580995021,27cyclictest20850irq/208-8000000.ethernet22:10:190
256458099501,7cyclictest2593506-21grep21:55:280
256458099501,2cyclictest0-21swapper/000:05:130
256458099491,22cyclictest2602322-21apt22:50:000
2564585994828,11cyclictest0-21swapper/221:00:292
2564583994835,8cyclictest2619303-21munin-plugin-st00:30:001
2564580994820,25cyclictest20650irq/252-8000000.ethernet19:50:240
256458099481,44cyclictest2581354-21/usr/sbin/munin20:45:230
256458099481,3cyclictest2585175-21grep21:05:290
2564580994810,33cyclictest0-21swapper/019:55:220
2564580994810,33cyclictest0-21swapper/019:55:220
2564583994729,11cyclictest0-21swapper/100:15:301
256458099472,40cyclictest2608145-21grep23:20:280
256458099471,2cyclictest0-21swapper/000:35:010
2564585994631,9cyclictest0-21swapper/220:50:282
256458099461,4cyclictest2583845-21/usr/sbin/munin21:00:180
2564585994432,8cyclictest0-21swapper/220:25:002
2564585994431,9cyclictest0-21swapper/223:15:292
2564585994430,8cyclictest0-21swapper/221:15:282
2564585994430,8cyclictest0-21swapper/219:40:262
2564583994430,8cyclictest0-21swapper/123:25:281
2564583994430,8cyclictest0-21swapper/122:35:281
2564583994429,8cyclictest0-21swapper/119:50:281
256458399441,17cyclictest0-21swapper/100:30:021
2564585994332,7cyclictest0-21swapper/222:55:312
2564585994331,7cyclictest0-21swapper/221:35:302
2564583994326,10cyclictest0-21swapper/120:10:191
2564585994228,9cyclictest2583493-21apt-get21:00:002
2564585994226,10cyclictest0-21swapper/219:50:282
256458399423,31cyclictest231ktimers/120:20:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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