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2026-08-24 - 01:03

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 Aug 23, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3796679997732,42cyclictest14-21rcu_preempt10:50:300
379667999591,54cyclictest0-21swapper/010:55:160
3796682995849,5cyclictest3824974-21munin-plugin-st09:55:011
3796682995849,5cyclictest3824974-21munin-plugin-st09:55:011
3796679995446,4cyclictest167350irq/118-8000000.ethernet-tx012:35:240
379667999534,8cyclictest3843181-21sh11:40:220
379667999534,8cyclictest3843181-21sh11:40:210
3796682995241,7cyclictest3804527-21munin-plugin-st07:55:011
3796679995242,5cyclictest20850irq/208-8000000.ethernet08:00:220
379667999522,9cyclictest3812707-21ps08:40:270
379667999521,2cyclictest0-21swapper/009:50:000
3796683995144,3cyclictest3841052-21unixbench_singl11:25:282
3796683995139,8cyclictest3826566-21grep10:00:282
3796679995041,5cyclictest167350irq/118-8000000.ethernet-tx008:45:200
3796683994934,11cyclictest0-21swapper/212:05:002
3796682994935,8cyclictest0-21swapper/111:00:001
3796679994941,5cyclictest3802848-21grep07:44:590
379667999491,27cyclictest0-21swapper/007:40:010
3796683994840,5cyclictest3825814-21munin-plugin-st09:59:592
3796683994836,8cyclictest3830052-21munin-plugin-st10:25:012
3796683994738,5cyclictest3812125-21run-parts08:39:592
3796679994740,4cyclictest167350irq/118-8000000.ethernet-tx011:30:220
3796679994739,4cyclictest167350irq/118-8000000.ethernet-tx008:35:000
3796679994638,4cyclictest167350irq/118-8000000.ethernet-tx011:05:280
3796679994613,14cyclictest3797629-21df07:15:020
3796683994533,8cyclictest0-21swapper/208:20:292
3796683994532,8cyclictest0-21swapper/210:30:292
3796682994530,9cyclictest3797178-21phc2sys07:10:261
3796679994539,4cyclictest3808645-21grep08:15:300
3796679994539,4cyclictest3808645-21grep08:15:300
3796679994539,3cyclictest167350irq/118-8000000.ethernet-tx012:25:190
3796679994532,9cyclictest131ktimers/012:00:130
379667999452,36cyclictest3826666-21latency_hist10:05:020
379667999451,38cyclictest0-21swapper/007:55:020
3796683994434,4cyclictest0-21swapper/211:35:292
3796683994433,6cyclictest0-21swapper/209:45:012
3796683994427,11cyclictest0-21swapper/212:20:282
3796683994427,11cyclictest0-21swapper/212:20:282
3796682994433,7cyclictest0-21swapper/110:30:291
3796682994432,8cyclictest0-21swapper/108:50:011
3796682994431,8cyclictest0-21swapper/107:45:311
3796679994437,4cyclictest0-21swapper/009:20:130
3796679994437,3cyclictest0-21swapper/008:20:190
3796679994436,5cyclictest167350irq/118-8000000.ethernet-tx012:10:120
3796679994436,4cyclictest0-21swapper/011:50:260
3796679994434,6cyclictest3817323-21grep09:05:290
3796679994433,8cyclictest0-21swapper/009:25:260
3796683994332,7cyclictest0-21swapper/208:25:272
3796682994333,4cyclictest0-21swapper/107:25:271
3796682994330,8cyclictest0-21swapper/110:25:281
3796682994327,7cyclictest0-21swapper/109:40:271
3796683994224,9cyclictest0-21swapper/207:55:282
3796682994228,9cyclictest0-21swapper/111:40:291
3796682994228,9cyclictest0-21swapper/111:40:291
3796682994228,9cyclictest0-21swapper/107:15:051
3796682994228,8cyclictest0-21swapper/108:30:311
379667999428,7cyclictest3810447-21latency_hist08:30:000
3796679994228,9cyclictest0-21swapper/011:25:290
379667999422,4cyclictest3807333-21df_inode08:10:180
379667999422,33cyclictest20850irq/208-8000000.ethernet11:55:180
3796682994133,4cyclictest3802766-21unixbench_multi07:40:271
3796682994130,6cyclictest0-21swapper/108:20:001
3796682994130,6cyclictest0-21swapper/108:20:001
3796682994128,8cyclictest0-21swapper/112:10:291
3796682994128,6cyclictest0-21swapper/107:30:291
3796682994127,8cyclictest0-21swapper/107:35:291
3796682994127,10cyclictest0-21swapper/111:30:261
3796679994133,4cyclictest20650irq/252-8000000.ethernet10:35:240
3796679994133,4cyclictest20650irq/252-8000000.ethernet08:55:200
3796679994130,8cyclictest0-21swapper/011:45:300
379667999412,5cyclictest3822964-21/usr/sbin/munin09:40:240
379667999412,10cyclictest3829135-21sed10:15:300
379668399407,16cyclictest3823495-21/usr/sbin/munin09:45:212
3796683994031,5cyclictest0-21swapper/209:00:012
3796683994026,7cyclictest0-21swapper/212:15:302
379668399401,14cyclictest0-21swapper/208:20:022
379668399401,14cyclictest0-21swapper/208:20:022
3796682994030,5cyclictest0-21swapper/111:35:281
3796682994028,8cyclictest0-21swapper/112:30:301
3796679994035,3cyclictest14-21rcu_preempt09:10:200
3796679994035,3cyclictest14-21rcu_preempt09:10:200
3796679994032,6cyclictest3798571-21grep07:15:300
3796679994029,7cyclictest0-21swapper/009:00:280
379667999402,5cyclictest0-21swapper/007:30:280
379667999402,36cyclictest0-21swapper/010:20:180
379667999402,36cyclictest0-21swapper/009:35:240
3796679994023,15cyclictest131ktimers/012:20:120
3796679994023,15cyclictest131ktimers/012:20:120
3796683993931,5cyclictest0-21swapper/210:35:292
3796683993929,5cyclictest3819865-21grep09:20:282
3796683993926,7cyclictest0-21swapper/210:55:292
3796682993929,6cyclictest0-21swapper/110:15:291
3796682993927,8cyclictest0-21swapper/112:25:291
3796682993925,8cyclictest0-21swapper/109:15:321
3796682993924,7cyclictest0-21swapper/109:15:011
3796682993924,7cyclictest0-21swapper/109:15:011
3796679993935,2cyclictest0-21swapper/011:35:110
3796679993934,3cyclictest167350irq/118-8000000.ethernet-tx011:10:210
3796679993928,6cyclictest3840216-21grep11:20:290
3796679993925,10cyclictest0-21swapper/008:50:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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