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2026-08-23 - 22:18

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 792 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
379667999392,10cyclictest0-21swapper/010:10:020
3796679993915,12cyclictest15-21rcuc/008:40:010
379667999391,36cyclictest0-21swapper/010:40:210
379667999391,36cyclictest0-21swapper/009:50:230
379667999391,36cyclictest0-21swapper/009:50:230
379667999391,36cyclictest0-21swapper/007:55:160
379668399383,12cyclictest3797967-21/usr/sbin/munin07:15:202
3796683993830,5cyclictest167550irq/134-8000000.ethernet-tx208:05:282
3796683993830,4cyclictest0-21swapper/212:30:002
3796683993829,4cyclictest167550irq/134-8000000.ethernet-tx209:00:292
3796683993826,8cyclictest0-21swapper/208:00:202
3796683993825,9cyclictest0-21swapper/207:30:292
3796683993822,8cyclictest0-21swapper/211:10:292
3796682993828,7cyclictest0-21swapper/110:05:291
3796682993826,7cyclictest0-21swapper/110:20:281
3796682993823,9cyclictest0-21swapper/110:40:001
3796679993833,3cyclictest167350irq/118-8000000.ethernet-tx008:07:110
3796679993831,4cyclictest0-21swapper/010:10:160
3796679993831,4cyclictest0-21swapper/009:35:010
3796679993826,9cyclictest0-21swapper/009:15:310
3796679993822,12cyclictest0-21swapper/007:20:230
3796679993822,12cyclictest0-21swapper/007:20:230
379667999381,3cyclictest3847915-21sed12:10:010
379667999381,3cyclictest0-21swapper/011:15:230
3796683993730,4cyclictest311ktimers/212:05:292
3796683993725,8cyclictest0-21swapper/209:40:012
3796683993724,9cyclictest0-21swapper/212:10:272
3796683993721,8cyclictest0-21swapper/207:45:302
379668399371,29cyclictest0-21swapper/211:30:282
379668399371,29cyclictest0-21swapper/208:30:242
3796682993729,5cyclictest0-21swapper/109:25:291
3796682993728,5cyclictest0-21swapper/111:20:291
3796682993724,9cyclictest0-21swapper/109:30:281
3796682993724,9cyclictest0-21swapper/107:20:301
3796682993724,9cyclictest0-21swapper/107:20:301
3796682993721,10cyclictest0-21swapper/112:00:291
379668299371,29cyclictest0-21swapper/111:50:181
3796679993732,2cyclictest200-21pr/ttyS212:20:000
3796679993728,5cyclictest3800203-21unixbench_multi07:25:270
3796679993727,7cyclictest0-21swapper/010:25:280
3796679993720,15cyclictest0-21swapper/010:45:130
3796679993720,15cyclictest0-21swapper/010:45:130
379667999371,4cyclictest0-21swapper/009:55:160
3796683993627,5cyclictest0-21swapper/211:45:012
3796683993627,5cyclictest0-21swapper/211:45:012
379668399361,33cyclictest3814107-21/usr/sbin/munin08:50:172
3796682993628,6cyclictest3838459-21unixbench_multi11:10:291
3796682993628,4cyclictest0-21swapper/111:55:281
3796682993627,6cyclictest3814651-21grep08:50:271
3796682993627,6cyclictest0-21swapper/111:25:281
3796682993627,4cyclictest0-21swapper/110:40:211
3796682993627,4cyclictest0-21swapper/109:05:271
3796682993623,6cyclictest0-21swapper/112:05:301
379668299361,28cyclictest3807042-21sshd08:06:101
3796679993616,14cyclictest131ktimers/011:00:150
3796679993616,14cyclictest131ktimers/011:00:140
379667999361,33cyclictest0-21swapper/007:45:480
3796683993527,5cyclictest3824966-21cron09:55:012
3796683993527,5cyclictest3824966-21cron09:55:012
3796683993525,7cyclictest0-21swapper/210:25:292
3796683993525,6cyclictest3846156-21cron12:00:012
3796683993524,7cyclictest0-21swapper/211:00:292
3796683993524,7cyclictest0-21swapper/211:00:292
3796683993523,9cyclictest0-21swapper/209:25:252
3796683993519,11cyclictest0-21swapper/210:10:272
3796683993519,11cyclictest0-21swapper/207:50:282
3796682993525,5cyclictest3796674-21cyclictest09:00:281
3796682993523,8cyclictest3823493-21sshd09:45:121
3796682993519,9cyclictest0-21swapper/110:50:301
3796679993523,8cyclictest0-21swapper/012:30:280
3796683993426,4cyclictest0-21swapper/207:30:012
3796683993425,5cyclictest0-21swapper/210:50:292
3796683993424,7cyclictest3828726-21cut10:15:222
3796683993422,9cyclictest0-21swapper/211:15:312
3796683993422,9cyclictest0-21swapper/207:10:262
3796683993421,9cyclictest0-21swapper/211:05:302
379668299344,21cyclictest3805775-21cut08:00:211
3796682993423,8cyclictest0-21swapper/110:00:001
3796682993423,8cyclictest0-21swapper/108:40:271
3796682993422,9cyclictest0-21swapper/112:20:191
3796682993422,9cyclictest0-21swapper/112:20:191
379668299341,28cyclictest0-21swapper/111:45:291
3796683993327,3cyclictest0-21swapper/207:40:232
3796683993321,8cyclictest0-21swapper/208:40:282
3796683993320,10cyclictest311ktimers/210:40:152
3796682993324,5cyclictest0-21swapper/109:35:281
3796682993324,5cyclictest0-21swapper/108:35:271
3796682993320,8cyclictest0-21swapper/109:20:191
379668299331,3cyclictest0-21swapper/108:25:011
379667999331,30cyclictest0-21swapper/010:30:050
3796683993225,4cyclictest0-21swapper/209:10:012
379668399321,25cyclictest0-21swapper/211:20:112
3796682993225,4cyclictest0-21swapper/110:10:161
379668299322,4cyclictest3852522-21if_eth112:35:221
3796682993224,5cyclictest0-21swapper/112:19:591
3796682993223,6cyclictest3826624-21grep10:00:301
3796682993223,6cyclictest0-21swapper/110:45:281
3796682993223,6cyclictest0-21swapper/110:45:281
3796682993222,7cyclictest3836829-21grep11:00:281
3796682993222,7cyclictest3836829-21grep11:00:281
3796682993222,5cyclictest0-21swapper/108:10:251
379668299321,25cyclictest3838767-21sshd11:15:071
3796683993122,4cyclictest0-21swapper/208:10:212
379668399311,27cyclictest1660-21snmpd11:54:162
379668399311,25cyclictest3843853-21dropbear11:45:142
3796683993022,6cyclictest3818578-21sh09:15:232
3796683993020,6cyclictest311ktimers/212:30:292
3796683993018,7cyclictest0-21swapper/207:20:302
3796683993018,7cyclictest0-21swapper/207:20:302
379668399301,2cyclictest0-21swapper/209:30:272
379668399301,27cyclictest3827494-21sshd10:09:112
3796682993025,3cyclictest3809952-21sh08:25:191
3796682993018,8cyclictest0-21swapper/111:05:301
3796683992920,7cyclictest0-21swapper/212:35:272
3796683992918,6cyclictest3813931-21apt-key08:50:012
3796683992916,9cyclictest0-21swapper/210:50:002
3796683992916,9cyclictest0-21swapper/210:50:002
3796683992817,7cyclictest0-21swapper/207:40:022
3796682992818,7cyclictest231ktimers/107:55:291
3796682992817,7cyclictest3815160-21dropbear08:55:201
379668399271,4cyclictest0-21swapper/209:10:112
379668399271,4cyclictest0-21swapper/209:10:112
379668299254,14cyclictest3796770-21wc07:10:011
379667999254,12cyclictest3796730-21latency_hist07:10:010
3796683991611,3cyclictest3796640-21latency_hist07:10:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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