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2026-07-25 - 21:12

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 Sat Jul 25, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3437811995727,19cyclictest0-21swapper/112:05:021
3437812995647,5cyclictest3478109-21munin-plugin-st11:05:002
3437808995412,5cyclictest131ktimers/007:40:290
3437811995238,9cyclictest0-21swapper/108:10:011
3437812995141,5cyclictest0-21swapper/212:20:002
3437812995138,6cyclictest3485635-21grep11:45:292
3437812994939,6cyclictest0-21swapper/209:40:002
3437811994937,7cyclictest3480509-21grep11:15:301
3437811994937,7cyclictest3480509-21grep11:15:301
3437811994932,12cyclictest231ktimers/110:10:141
3437808994942,5cyclictest3446494-21cron08:00:000
3437808994941,4cyclictest167350irq/118-8000000.ethernet-tx010:40:250
3437808994941,4cyclictest167350irq/118-8000000.ethernet-tx010:40:250
3437808994927,18cyclictest3478720-21ptp4l11:05:280
3437808994917,28cyclictest0-21swapper/011:55:220
343780899491,5cyclictest3488158-21unixbench_multi12:00:280
343780899488,38cyclictest15-21rcuc/012:25:010
3437808994741,4cyclictest0-21swapper/008:35:120
3437808994741,4cyclictest0-21swapper/008:35:120
3437808994741,3cyclictest0-21swapper/008:25:010
3437808994733,8cyclictest131ktimers/010:00:140
3437812994637,4cyclictest0-21swapper/212:25:002
3437812994629,9cyclictest0-21swapper/209:40:302
3437811994629,11cyclictest0-21swapper/110:45:301
3437808994639,4cyclictest167350irq/118-8000000.ethernet-tx008:10:140
3437808994638,4cyclictest167350irq/118-8000000.ethernet-tx011:05:000
3437812994529,10cyclictest0-21swapper/211:20:012
3437812994529,10cyclictest0-21swapper/211:20:012
3437811994538,4cyclictest3491709-21munin-plugin-st12:25:001
3437811994534,8cyclictest3440603-21munin-plugin-st07:25:011
3437808994534,8cyclictest0-21swapper/009:40:300
3437812994426,10cyclictest0-21swapper/211:30:282
3437812994426,10cyclictest0-21swapper/211:30:282
3437811994436,4cyclictest3453344-21munin-plugin-st08:40:011
3437811994436,4cyclictest3453344-21munin-plugin-st08:40:011
3437811994433,7cyclictest0-21swapper/108:45:281
3437811994429,9cyclictest0-21swapper/107:15:281
3437808994433,8cyclictest0-21swapper/010:50:000
3437808994432,8cyclictest131ktimers/011:35:140
3437808994430,8cyclictest131ktimers/012:05:140
3437808994428,14cyclictest167350irq/118-8000000.ethernet-tx008:00:110
3437808994425,15cyclictest0-21swapper/008:10:020
3437812994334,5cyclictest3471077-21grep10:20:302
3437812994331,7cyclictest3486474-21grep11:50:322
3437812994331,7cyclictest3450695-21unixbench_singl08:20:332
3437811994325,9cyclictest0-21swapper/111:45:291
3437811994323,14cyclictest231ktimers/110:00:151
3437811994323,12cyclictest231ktimers/107:35:131
343780899437,34cyclictest14-21rcu_preempt12:25:290
343780899437,34cyclictest14-21rcu_preempt12:25:290
3437808994335,3cyclictest3460930-21/usr/sbin/munin09:20:300
3437808994331,9cyclictest0-21swapper/007:15:010
3437808994331,7cyclictest3473587-21grep10:35:300
3437808994329,10cyclictest0-21swapper/012:15:010
343780899432,5cyclictest3485129-21df_inode11:45:180
343780899431,6cyclictest15-21rcuc/008:40:290
3437812994232,5cyclictest0-21swapper/209:10:292
3437812994231,6cyclictest0-21swapper/207:15:052
3437812994229,7cyclictest3449787-21grep08:15:302
3437812994225,9cyclictest0-21swapper/207:40:222
3437811994226,8cyclictest0-21swapper/108:40:271
3437811994223,11cyclictest231ktimers/112:35:151
3437808994234,4cyclictest0-21swapper/011:15:220
3437808994234,4cyclictest0-21swapper/011:15:220
343780899422,5cyclictest3462634-21munin-run09:35:010
343780899421,39cyclictest0-21swapper/010:20:270
3437808994212,27cyclictest131ktimers/011:40:240
3437808994210,28cyclictest0-21swapper/007:20:000
3437812994134,5cyclictest311ktimers/210:50:002
3437812994132,4cyclictest0-21swapper/210:25:302
3437812994130,7cyclictest3489883-21grep12:10:312
3437812994130,6cyclictest0-21swapper/210:15:292
3437812994130,6cyclictest0-21swapper/208:50:302
3437812994129,8cyclictest0-21swapper/207:45:292
3437812994127,7cyclictest0-21swapper/208:00:272
3437812994126,9cyclictest0-21swapper/210:40:212
3437812994126,9cyclictest0-21swapper/210:40:212
3437812994125,11cyclictest0-21swapper/208:05:232
3437812994113,15cyclictest3437805-21cyclictest11:10:172
3437811994132,6cyclictest0-21swapper/109:15:291
3437811994132,6cyclictest0-21swapper/109:15:291
3437811994129,8cyclictest0-21swapper/110:55:001
3437811994126,11cyclictest0-21swapper/111:00:021
3437811994125,9cyclictest0-21swapper/108:20:321
343780899412,12cyclictest3449873-21sh08:20:010
343780899411,38cyclictest0-21swapper/009:45:210
343781299403,28cyclictest0-21swapper/207:12:202
3437812994024,7cyclictest0-21swapper/209:55:282
3437812994024,7cyclictest0-21swapper/209:55:282
3437812994024,7cyclictest0-21swapper/208:45:202
3437812994016,14cyclictest0-21swapper/208:25:132
3437811994028,8cyclictest0-21swapper/111:00:291
3437811994027,9cyclictest0-21swapper/110:30:291
3437811994027,9cyclictest0-21swapper/110:30:291
3437811994026,9cyclictest0-21swapper/108:10:311
3437808994031,7cyclictest131ktimers/008:50:290
3437808994031,6cyclictest3468505-21grep10:05:310
3437808994028,8cyclictest0-21swapper/011:25:270
3437808994028,7cyclictest3441387-21grep07:25:300
343780899401,36cyclictest0-21swapper/009:00:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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