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2026-05-25 - 10:18

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 May 25, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3681459998312,15cyclictest3730926-21/usr/sbin/munin23:55:172
3681455997618,14cyclictest3721928-21mailstats23:00:280
3681455997618,14cyclictest3721928-21mailstats23:00:280
3681455997243,24cyclictest20650irq/252-8000000.ethernet21:45:160
3681455997243,24cyclictest20650irq/252-8000000.ethernet21:45:160
368145899711,58cyclictest0-21swapper/120:40:111
368145899701,60cyclictest0-21swapper/119:35:141
3681459996856,9cyclictest311ktimers/221:40:002
368145899681,54cyclictest0-21swapper/100:05:151
368145899671,51cyclictest0-21swapper/121:25:111
368145599673,23cyclictest3710299-21fschecks_time21:55:210
368145599672,62cyclictest3712731-21/usr/sbin/munin22:10:180
368145599671,61cyclictest0-21swapper/019:45:010
368145899661,60cyclictest0-21swapper/120:10:021
368145899661,60cyclictest0-21swapper/120:10:011
368145599664,34cyclictest3685864-21head19:30:280
368145899651,52cyclictest0-21swapper/123:50:111
368145599651,59cyclictest3725855-21/usr/sbin/munin23:25:180
368145599651,2cyclictest0-21swapper/000:15:140
3681458996424,33cyclictest0-21swapper/121:20:281
368145899641,57cyclictest0-21swapper/123:35:001
368145899641,57cyclictest0-21swapper/123:35:001
368145899641,54cyclictest0-21swapper/100:25:121
368145899641,49cyclictest0-21swapper/121:15:151
368145599646,28cyclictest0-21swapper/020:10:010
368145599646,28cyclictest0-21swapper/020:10:010
368145599642,33cyclictest3718215-21/usr/sbin/munin22:40:240
368145599641,60cyclictest3693218-21diskstats20:15:190
368145899631,47cyclictest0-21swapper/121:50:121
3681458996231,26cyclictest0-21swapper/100:00:011
3681458996218,37cyclictest0-21swapper/119:40:271
368145899621,50cyclictest0-21swapper/120:15:131
368145899621,49cyclictest0-21swapper/119:25:151
368145599621,2cyclictest0-21swapper/021:50:140
368145599621,2cyclictest0-21swapper/021:20:110
368145599621,26cyclictest3711904-21/usr/sbin/munin22:05:190
368145899611,52cyclictest0-21swapper/123:05:131
368145899611,52cyclictest0-21swapper/119:50:131
3681458996041,15cyclictest3701398-21munin-plugin-st21:05:011
368145899601,52cyclictest0-21swapper/119:45:111
3681455996023,33cyclictest0-21swapper/023:50:010
368145599601,56cyclictest3686769-21munin-run19:40:000
368145599601,53cyclictest3711052-21diskstats22:00:170
368145599601,51cyclictest0-21swapper/020:20:110
368145599601,2cyclictest0-21swapper/020:00:100
368145899591,51cyclictest0-21swapper/120:20:131
368145899591,36cyclictest0-21swapper/122:00:011
3681455995933,23cyclictest3685066-21sshd19:26:560
3681455995933,21cyclictest0-21swapper/020:45:290
3681455995916,35cyclictest0-21swapper/000:20:050
368145599591,2cyclictest0-21swapper/021:15:120
368145599591,2cyclictest0-21swapper/020:40:140
368145899586,43cyclictest3735629-21grep00:20:271
3681458995827,27cyclictest0-21swapper/122:05:291
368145899581,50cyclictest0-21swapper/119:10:131
368145899581,49cyclictest0-21swapper/123:45:141
368145599584,50cyclictest3738386-21grep00:35:300
368145599583,51cyclictest3720758-21lsblk22:55:180
3681455995822,31cyclictest20650irq/252-8000000.ethernet19:50:020
368145599581,2cyclictest0-21swapper/022:25:120
3681458995731,21cyclictest0-21swapper/120:55:011
3681458995730,21cyclictest0-21swapper/122:35:211
368145899572,46cyclictest3682948-21/usr/sbin/munin19:15:211
3681458995716,33cyclictest0-21swapper/122:15:291
368145599571,2cyclictest0-21swapper/023:40:140
368145599571,2cyclictest0-21swapper/020:25:120
368145599571,2cyclictest0-21swapper/019:15:120
3681459995635,14cyclictest311ktimers/222:40:092
368145899566,42cyclictest0-21swapper/122:10:281
3681458995646,7cyclictest3718661-21latency_hist22:45:011
368145899562,45cyclictest3689686-21cut19:55:201
3681458995620,31cyclictest0-21swapper/120:30:001
3681455995637,16cyclictest0-21swapper/021:30:190
368145599562,50cyclictest3697228-21latency_hist20:40:000
368145599562,45cyclictest3734268-21latency_hist00:15:020
368145599562,45cyclictest3734268-21latency_hist00:15:020
368145599561,2cyclictest0-21swapper/022:30:130
3681458995534,17cyclictest0-21swapper/121:10:191
368145899552,45cyclictest3702346-21grep21:10:001
3681458995522,27cyclictest0-21swapper/121:45:011
3681458995519,29cyclictest0-21swapper/123:25:281
368145899551,47cyclictest0-21swapper/120:55:111
3681458995513,34cyclictest167450irq/126-8000000.ethernet-tx122:25:281
3681455995519,32cyclictest0-21swapper/000:30:280
368145599551,46cyclictest3706741-21/usr/sbin/munin21:35:110
368145599551,2cyclictest0-21swapper/023:55:140
368145599551,2cyclictest0-21swapper/022:35:150
368145999546,31cyclictest311ktimers/223:50:022
3681458995419,26cyclictest0-21swapper/123:00:281
3681458995419,26cyclictest0-21swapper/123:00:271
368145899541,46cyclictest0-21swapper/122:30:151
368145599542,49cyclictest3726723-21sh23:30:210
368145599542,49cyclictest3726723-21sh23:30:200
368145599541,49cyclictest3713921-21/usr/sbin/munin22:15:260
368145599541,2cyclictest0-21swapper/021:05:160
368145599541,28cyclictest3705483-21ptp4l-jitter21:25:260
368145899532,43cyclictest3720719-21/usr/sbin/munin22:55:181
368145899532,43cyclictest3719154-21/usr/sbin/munin22:45:251
368145899532,43cyclictest3708557-21grep21:45:181
368145899532,43cyclictest3708557-21grep21:45:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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