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2026-03-24 - 16:43

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 Mar 24, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
386353899715,19cyclictest0-21swapper/110:50:021
3863538996828,34cyclictest0-21swapper/109:40:291
3863538996728,33cyclictest0-21swapper/112:15:201
3863538996631,30cyclictest0-21swapper/111:55:261
3863538996628,33cyclictest0-21swapper/109:55:001
3863538996415,8cyclictest3874200-21/usr/sbin/munin08:10:201
3863538996321,34cyclictest0-21swapper/112:30:281
3863538996229,29cyclictest0-21swapper/108:35:001
3863538996114,39cyclictest0-21swapper/109:10:011
3863538995922,30cyclictest0-21swapper/112:05:271
3863538995917,4cyclictest0-21swapper/111:20:281
3863538995821,32cyclictest0-21swapper/108:35:291
3863538995821,32cyclictest0-21swapper/108:35:281
3863538995821,28cyclictest0-21swapper/107:25:281
3863538995618,4cyclictest0-21swapper/112:20:261
3863538995618,32cyclictest0-21swapper/107:35:271
3863538995618,31cyclictest0-21swapper/107:50:281
3863538995610,9cyclictest3903680-21unixbench_singl11:00:291
386353899552,11cyclictest3875566-21grep08:15:311
386353899551,29cyclictest3876740-21/usr/sbin/munin08:25:251
3863535995513,5cyclictest0-21swapper/011:10:000
386353899546,14cyclictest0-21swapper/109:30:241
3863538995418,4cyclictest0-21swapper/111:50:011
386353899541,4cyclictest0-21swapper/109:15:011
3863538995414,5cyclictest0-21swapper/109:55:271
386353899541,22cyclictest1660-21snmpd08:24:341
3863538995329,19cyclictest3904570-21munin-plugin-st11:10:001
3863538995325,22cyclictest0-21swapper/108:40:201
386353899531,24cyclictest0-21swapper/107:30:271
3863539995244,5cyclictest3873936-21unixbench_singl08:05:292
3863538995228,15cyclictest0-21swapper/110:10:001
3863538995227,21cyclictest3872117-21grep07:55:291
3863538995216,4cyclictest0-21swapper/110:20:261
3863538995214,6cyclictest0-21swapper/111:35:211
386353599521,18cyclictest0-21swapper/010:10:010
3863539995135,11cyclictest0-21swapper/211:35:012
3863538995118,28cyclictest0-21swapper/111:45:011
3863535995143,5cyclictest0-21swapper/008:25:000
3863538995015,10cyclictest0-21swapper/112:10:281
386353899501,24cyclictest0-21swapper/107:49:251
386353899501,24cyclictest0-21swapper/107:49:251
386353599501,45cyclictest1660-21snmpd11:25:230
386353599501,45cyclictest1660-21snmpd11:25:230
3863535995012,34cyclictest0-21swapper/011:15:280
386353899498,12cyclictest0-21swapper/108:05:011
386353899495,12cyclictest0-21swapper/108:55:281
386353899491,2cyclictest0-21swapper/108:55:011
386353999484,38cyclictest30-21rcuc/212:20:012
3863539994842,2cyclictest0-21swapper/209:35:012
3863539994839,4cyclictest3901197-21munin-plugin-st10:50:002
3863538994835,10cyclictest3885814-21sendmail09:20:001
3863538994824,20cyclictest0-21swapper/110:10:201
3863538994814,29cyclictest0-21swapper/107:15:001
386353899481,2cyclictest0-21swapper/108:05:161
3863539994739,5cyclictest3872153-21grep07:55:302
3863538994717,5cyclictest3900268-21grep10:40:281
386353899471,2cyclictest0-21swapper/110:35:231
3863535994734,7cyclictest3915541-21unixbench_multi12:10:300
3863535994731,13cyclictest0-21swapper/008:55:000
3863538994626,12cyclictest0-21swapper/110:15:281
3863538994616,25cyclictest0-21swapper/110:50:211
3863538994614,8cyclictest3890637-21sshd09:45:251
386353899461,27cyclictest0-21swapper/110:55:271
3863538994611,7cyclictest0-21swapper/111:35:011
3863535994638,6cyclictest131ktimers/007:30:000
3863535994637,6cyclictest3872132-21grep07:55:300
386353599461,38cyclictest3898761-21latency_hist10:35:010
386353599461,38cyclictest3898761-21latency_hist10:35:010
3863539994533,8cyclictest0-21swapper/212:40:002
3863538994519,3cyclictest0-21swapper/110:04:361
3863538994517,6cyclictest231ktimers/107:40:231
3863538994516,8cyclictest0-21swapper/109:40:011
3863535994538,4cyclictest167350irq/118-8000000.ethernet-tx010:50:190
3863535994535,5cyclictest3919738-21grep12:35:260
3863535994528,15cyclictest167350irq/118-8000000.ethernet-tx007:35:240
386353599451,7cyclictest0-21swapper/010:45:010
386353599451,42cyclictest0-21swapper/007:15:240
3863538994414,4cyclictest0-21swapper/108:50:011
3863535994435,7cyclictest0-21swapper/007:30:140
386353599442,5cyclictest3888350-21munin-run09:35:000
386353999434,34cyclictest32-21ksoftirqd/211:35:212
3863539994333,6cyclictest0-21swapper/210:15:002
3863539994333,5cyclictest14-21rcu_preempt10:55:212
3863539994330,9cyclictest0-21swapper/212:30:202
3863539994318,10cyclictest3888330-21kworker/u8:0+flush-179:9609:55:042
3863538994325,14cyclictest0-21swapper/109:00:281
3863535994337,2cyclictest0-21swapper/012:20:190
386353599433,5cyclictest3909039-21df11:35:180
3863535994324,9cyclictest0-21swapper/010:50:010
3863539994235,4cyclictest167550irq/134-8000000.ethernet-tx212:00:012
3863539994232,7cyclictest3870427-21grep07:45:272
3863539994232,7cyclictest3870427-21grep07:45:272
3863539994232,5cyclictest3902035-21munin-plugin-st10:55:002
3863539994217,14cyclictest311ktimers/210:25:112
3863535994234,5cyclictest0-21swapper/009:10:010
386353599421,38cyclictest0-21swapper/009:25:250
3863539994134,4cyclictest0-21swapper/210:25:012
3863539994131,6cyclictest0-21swapper/210:30:292
3863539994131,6cyclictest0-21swapper/210:30:292
3863539994130,6cyclictest0-21swapper/210:15:282
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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