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2026-05-10 - 21:42

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 Sun May 10, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3449526991283,21cyclictest3457434-21kworker/u8:0+ext4-rsv-conversion08:10:013
34495269911417,76cyclictest3496503-21apt-get11:45:013
34495209911490,15cyclictest3472742-21kworker/u8:0+events_power_efficient09:30:180
3449520999490,2cyclictest0-21swapper/008:00:010
3449520999490,2cyclictest0-21swapper/008:00:010
3449526999311,52cyclictest3450480-21df07:15:023
3449522996932,31cyclictest0-21swapper/110:10:181
3449522996932,31cyclictest0-21swapper/110:10:181
344952099681,61cyclictest0-21swapper/008:05:120
3449522996621,9cyclictest0-21swapper/112:15:281
3449522996432,24cyclictest0-21swapper/111:45:011
3449522996324,10cyclictest0-21swapper/111:05:271
3449522996324,10cyclictest0-21swapper/111:05:271
3449522996229,6cyclictest0-21swapper/108:05:281
3449522996225,7cyclictest0-21swapper/109:40:281
3449522995926,8cyclictest0-21swapper/112:35:001
344952499583,34cyclictest30-21rcuc/211:45:012
3449522995833,6cyclictest3471777-21grep09:15:281
3449522995833,6cyclictest3471777-21grep09:15:281
344952299581,26cyclictest0-21swapper/110:00:011
3449520995849,5cyclictest0-21swapper/009:25:110
3449522995745,9cyclictest3497539-21apt-key11:50:021
344952099572,18cyclictest0-21swapper/011:10:010
344952099572,18cyclictest0-21swapper/011:10:010
3449522995413,18cyclictest3479716-21/usr/sbin/munin10:05:191
3449520995345,5cyclictest0-21swapper/007:30:280
344952499529,14cyclictest30-21rcuc/210:25:012
3449524995241,6cyclictest0-21swapper/208:05:192
3449522995222,9cyclictest0-21swapper/109:35:261
344952099524,45cyclictest0-21swapper/011:35:220
3449520995239,8cyclictest0-21swapper/008:20:000
3449520995237,10cyclictest0-21swapper/008:15:000
3449520995237,10cyclictest0-21swapper/008:15:000
344952499502,30cyclictest32-21ksoftirqd/210:30:012
344952299496,11cyclictest0-21swapper/111:20:011
3449520994941,4cyclictest167350irq/118-8000000.ethernet-tx010:30:300
3449520994937,6cyclictest3477279-21sh09:50:180
3449520994930,17cyclictest167350irq/118-8000000.ethernet-tx012:35:010
3449520994817,27cyclictest0-21swapper/012:20:000
3449522994739,4cyclictest3487961-21munin-plugin-st10:55:001
3449520994730,10cyclictest12-21ksoftirqd/007:25:020
3449520994719,17cyclictest15-21rcuc/009:25:000
3449524994627,15cyclictest311ktimers/209:55:132
3449524994616,22cyclictest30-21rcuc/207:40:012
3449522994637,4cyclictest3474444-21munin-plugin-st09:35:001
344952099462,41cyclictest3486225-21grep10:40:290
3449524994529,11cyclictest0-21swapper/207:25:012
3449524994515,17cyclictest311ktimers/210:05:132
3449520994539,3cyclictest167350irq/118-8000000.ethernet-tx011:15:260
3449520994537,3cyclictest0-21swapper/008:40:010
3449520994536,5cyclictest0-21swapper/009:40:200
3449520994522,21cyclictest14-21rcu_preempt07:40:190
3449520994437,4cyclictest0-21swapper/010:55:300
3449520994426,12cyclictest12-21ksoftirqd/010:15:010
3449520994426,12cyclictest12-21ksoftirqd/010:15:010
344952099441,41cyclictest0-21swapper/012:05:020
3449524994330,9cyclictest0-21swapper/212:10:252
3449524994325,13cyclictest0-21swapper/211:05:012
344952099437,29cyclictest3493211-21latency_hist11:25:010
3449520994339,2cyclictest0-21swapper/009:05:010
3449520994339,2cyclictest0-21swapper/009:05:010
344952099433,38cyclictest0-21swapper/012:05:240
3449520994333,3cyclictest3485628-21latency_hist10:40:010
3449520994328,13cyclictest131ktimers/007:15:110
3449520994316,24cyclictest3462511-21kworker/u8:3-events_freezable_power_08:25:270
344952099431,40cyclictest0-21swapper/011:10:230
3449524994219,10cyclictest311ktimers/208:55:132
3449522994233,5cyclictest3465056-21latency_hist08:40:001
3449520994235,4cyclictest167350irq/118-8000000.ethernet-tx008:00:240
3449520994234,4cyclictest20850irq/208-8000000.ethernet10:20:000
3449520994233,6cyclictest15-21rcuc/008:55:300
3449520994233,5cyclictest3475284-21run-parts09:40:000
3449520994228,4cyclictest20650irq/252-8000000.ethernet09:45:200
344952099421,6cyclictest3452311-21munin-run07:25:010
344952099421,3cyclictest0-21swapper/012:15:010
344952099421,39cyclictest0-21swapper/010:25:230
344952099421,39cyclictest0-21swapper/007:35:050
3449520994212,5cyclictest3497597-21gpgconf11:50:010
344952099421,25cyclictest3493966-21latency_hist11:30:010
344952499419,14cyclictest32-21ksoftirqd/208:45:022
3449524994131,5cyclictest0-21swapper/209:20:292
3449524994128,6cyclictest0-21swapper/211:30:292
344952499412,15cyclictest14-21rcu_preempt10:50:012
3449524994121,13cyclictest311ktimers/209:10:112
3449524994117,13cyclictest311ktimers/210:00:122
3449520994133,4cyclictest167350irq/118-8000000.ethernet-tx008:45:250
3449520994118,16cyclictest131ktimers/010:50:110
3449524994029,6cyclictest14-21rcu_preempt09:30:282
3449524994024,11cyclictest311ktimers/210:50:122
3449524994024,11cyclictest311ktimers/208:45:112
3449524994019,11cyclictest311ktimers/209:35:122
3449520994031,5cyclictest3462013-21fschecks_count08:20:190
344952099401,4cyclictest3449984-21meminfo07:10:240
344952099401,37cyclictest0-21swapper/009:10:210
3449524993931,5cyclictest311ktimers/211:20:102
3449524993929,7cyclictest0-21swapper/209:15:282
3449524993929,7cyclictest0-21swapper/209:15:282
3449524993928,6cyclictest0-21swapper/210:15:262
3449524993928,5cyclictest0-21swapper/209:45:272
3449524993924,10cyclictest311ktimers/207:55:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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