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2026-03-19 - 06:43

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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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 50 highest latencies:
System rackeslot6s.osadl.org (updated Thu Mar 19, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
318987599787,4cyclictest0-21swapper/023:40:020
3189875995814,38cyclictest0-21swapper/000:35:010
318987599551,35cyclictest15-21rcuc/020:10:000
318987899544,30cyclictest0-21swapper/123:50:011
318987899544,30cyclictest0-21swapper/123:50:001
3189875995334,16cyclictest167350irq/118-8000000.ethernet-tx022:25:000
3189878995133,8cyclictest0-21swapper/123:05:001
318987599511,38cyclictest0-21swapper/020:00:010
318987899501,28cyclictest0-21swapper/119:35:021
318987899501,28cyclictest0-21swapper/119:35:021
3189875995042,4cyclictest167350irq/118-8000000.ethernet-tx023:25:000
318987999491,7cyclictest0-21swapper/223:05:002
318987899491,30cyclictest0-21swapper/100:15:011
3189878994837,8cyclictest3242822-21sendmail00:20:011
3189878994827,9cyclictest0-21swapper/123:35:301
318987899481,34cyclictest0-21swapper/123:25:021
3189879994734,9cyclictest1283-21cron19:55:002
3189875994740,3cyclictest167350irq/118-8000000.ethernet-tx019:35:180
3189875994738,6cyclictest3239680-21cpu00:00:160
3189878994639,4cyclictest3232681-21cron23:20:001
3189875994639,4cyclictest167350irq/118-8000000.ethernet-tx020:45:270
3189875994639,4cyclictest167350irq/118-8000000.ethernet-tx000:35:210
3189879994534,7cyclictest0-21swapper/220:00:302
3189879994529,12cyclictest311ktimers/223:50:132
3189879994527,15cyclictest311ktimers/222:10:122
3189879994527,15cyclictest311ktimers/222:10:112
3189878994535,7cyclictest3228470-21munin-plugin-st22:55:011
3189878994534,7cyclictest0-21swapper/122:40:281
3189875994537,4cyclictest167350irq/118-8000000.ethernet-tx019:10:160
3189875994533,6cyclictest3192643-21kworker/u8:2-events_freezable_power_19:35:010
3189875994533,6cyclictest3192643-21kworker/u8:2-events_freezable_power_19:35:010
318987599451,38cyclictest0-21swapper/020:15:240
3189879994435,5cyclictest3225091-21munin-plugin-st22:35:002
3189879994434,6cyclictest14-21rcu_preempt00:30:272
3189878994434,6cyclictest3208778-21munin-plugin-st21:00:011
3189878994430,9cyclictest0-21swapper/122:15:021
3189878994430,9cyclictest0-21swapper/122:15:021
3189875994438,3cyclictest167350irq/118-8000000.ethernet-tx019:50:120
3189875994437,4cyclictest20650irq/252-8000000.ethernet23:20:000
3189875994437,3cyclictest14-21rcu_preempt23:05:290
3189875994437,3cyclictest14-21rcu_preempt23:05:290
3189875994433,7cyclictest3239451-21sendmail00:00:000
318987599442,6cyclictest3243175-21df00:20:160
318987599442,5cyclictest3236581-21memory23:40:250
318987999437,21cyclictest30-21rcuc/220:55:002
3189879994329,10cyclictest0-21swapper/220:30:262
3189878994337,4cyclictest3189872-21cyclictest22:10:011
3189875994338,3cyclictest131ktimers/000:30:010
3189875994338,3cyclictest131ktimers/000:30:010
3189875994336,3cyclictest3229110-21grep22:55:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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