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2026-06-17 - 16:02

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 Wed Jun 17, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3451308998642,39cyclictest3485694-21gpgv10:30:012
3451308998114,27cyclictest3491888-21/usr/sbin/munin11:05:182
3451304997974,2cyclictest0-21swapper/011:00:120
3451308997324,5cyclictest0-21swapper/212:30:152
3451308997110,13cyclictest3457759-21/usr/sbin/munin07:45:192
3451304996864,2cyclictest0-21swapper/010:45:010
3451304996864,2cyclictest0-21swapper/010:45:010
3451308996722,7cyclictest0-21swapper/209:25:272
3451308996719,8cyclictest0-21swapper/209:55:282
3451308996623,5cyclictest0-21swapper/210:05:292
3451308996619,5cyclictest0-21swapper/210:45:272
345130499638,11cyclictest15-21rcuc/010:25:010
3451304996255,4cyclictest0-21swapper/011:35:110
3451308996028,25cyclictest0-21swapper/208:15:292
3451308996021,6cyclictest0-21swapper/210:15:282
3451304996052,4cyclictest0-21swapper/009:20:140
3451308995927,27cyclictest0-21swapper/209:35:282
3451308995917,7cyclictest0-21swapper/212:25:182
3451308995819,7cyclictest0-21swapper/208:50:282
3451308995619,8cyclictest0-21swapper/209:20:302
3451308995420,5cyclictest0-21swapper/208:10:302
3451304995429,22cyclictest20650irq/252-8000000.ethernet10:15:250
3451308995323,6cyclictest3495059-21grep11:20:272
3451304995345,4cyclictest167350irq/118-8000000.ethernet-tx010:50:110
3451308995224,24cyclictest0-21swapper/207:15:262
3451304995244,5cyclictest20650irq/252-8000000.ethernet08:50:280
3451304995244,5cyclictest167350irq/118-8000000.ethernet-tx008:45:290
3451304995244,5cyclictest167350irq/118-8000000.ethernet-tx008:45:290
3451304995132,15cyclictest131ktimers/011:10:150
345130499512,7cyclictest3459369-21cp07:55:010
345130499511,3cyclictest0-21swapper/008:35:110
345130499511,3cyclictest0-21swapper/008:35:110
3451308995041,6cyclictest3451299-21cyclictest09:10:012
3451308995041,5cyclictest0-21swapper/209:35:012
3451308995020,6cyclictest0-21swapper/207:55:002
3451307995041,4cyclictest0-21swapper/108:35:001
345130499502,45cyclictest0-21swapper/011:40:290
3451307994940,5cyclictest3468624-21munin-plugin-st08:50:001
3451307994940,5cyclictest3468624-21munin-plugin-st08:49:591
3451307994935,8cyclictest0-21swapper/108:15:011
3451308994819,6cyclictest0-21swapper/210:40:262
3451308994819,6cyclictest0-21swapper/210:40:262
345130499488,15cyclictest0-21swapper/011:00:020
3451304994840,4cyclictest167350irq/118-8000000.ethernet-tx009:05:220
3451304994743,2cyclictest0-21swapper/011:55:120
3451304994740,4cyclictest167350irq/118-8000000.ethernet-tx011:53:160
3451304994730,15cyclictest167350irq/118-8000000.ethernet-tx009:45:300
345130499471,44cyclictest0-21swapper/008:00:120
3451304994714,29cyclictest0-21swapper/008:10:010
3451307994635,7cyclictest3469606-21apt-key08:55:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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