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2025-11-27 - 21:49

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 Nov 27, 2025 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2635169997635,5cyclictest0-21swapper/011:45:130
2635169997029,9cyclictest0-21swapper/007:20:290
263517499646,42cyclictest30-21rcuc/209:30:012
2635171996313,11cyclictest2649775-21apt-get08:35:011
2635169996152,5cyclictest0-21swapper/010:20:110
2635171996045,10cyclictest2641341-21munin-plugin-st07:45:001
2635171996045,10cyclictest2641341-21munin-plugin-st07:45:001
263516999601,10cyclictest0-21swapper/010:50:020
263516999571,23cyclictest0-21swapper/011:15:010
2635174995541,10cyclictest0-21swapper/212:25:002
2635171995549,4cyclictest22-21rcuc/107:20:191
2635171995335,12cyclictest0-21swapper/111:35:271
2635171995215,14cyclictest2669578-21/usr/sbin/munin10:30:181
2635169995241,6cyclictest2683840-21munin-plugin-st11:55:000
263516999521,16cyclictest24150irq/422-mmc108:00:010
263516999521,16cyclictest24150irq/422-mmc108:00:010
263517499511,19cyclictest0-21swapper/207:25:012
2635171995134,13cyclictest231ktimers/108:05:111
2635171995134,13cyclictest231ktimers/107:45:111
263517199513,10cyclictest2690773-21apt-get12:35:011
2635171995129,13cyclictest2689032-21apt-config12:25:001
2635171995035,7cyclictest2688194-21apt-key12:20:001
2635171994940,5cyclictest2637107-21latency_hist07:20:011
263517199493,37cyclictest0-21swapper/109:50:011
2635171994931,12cyclictest0-21swapper/108:10:281
2635171994931,12cyclictest0-21swapper/108:10:281
2635171994926,12cyclictest0-21swapper/111:30:281
2635174994840,4cyclictest2649778-21munin-plugin-st08:35:002
2635174994836,9cyclictest2654087-21sendmail09:00:002
2635174994836,9cyclictest2654087-21sendmail09:00:002
2635171994833,9cyclictest0-21swapper/108:40:291
2635174994731,8cyclictest0-21swapper/212:15:002
2635171994728,15cyclictest231ktimers/108:45:171
2635171994728,12cyclictest231ktimers/109:00:131
2635171994728,11cyclictest231ktimers/110:20:121
2635171994631,8cyclictest2661639-21grep09:40:291
2635171994629,10cyclictest231ktimers/110:15:141
263517199462,3cyclictest2664395-21gpg-connect-age10:00:011
2635169994637,4cyclictest21050irq/252-8000000.ethernet10:50:270
2635169994635,6cyclictest0-21swapper/012:00:190
2635169994622,18cyclictest21050irq/252-8000000.ethernet11:25:180
263516999461,6cyclictest0-21swapper/008:10:010
2635169994613,27cyclictest0-21swapper/009:45:210
2635174994538,4cyclictest2638801-21apt07:30:002
2635174994538,4cyclictest2638801-21apt07:30:002
2635174994536,5cyclictest0-21swapper/210:55:002
2635174994534,5cyclictest0-21swapper/212:35:012
2635171994536,5cyclictest2686378-21munin-plugin-st12:10:011
2635171994536,5cyclictest2684641-21unixbench_singl11:55:291
2635171994528,10cyclictest0-21swapper/108:20:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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