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2026-06-03 - 22:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack4slot1s.osadl.org (updated Wed Jun 03, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
508821030,3sleep30-21swapper/312:32:593
508821030,3sleep30-21swapper/312:32:593
508821030,3sleep30-21swapper/312:32:593
268462930,1sleep026847-21unixbench-2d12:03:050
268462930,1sleep026847-21unixbench-2d12:03:050
286202730,2sleep00-21swapper/010:42:580
286202730,2sleep00-21swapper/010:42:580
98482630,3sleep30-21swapper/309:52:563
98482630,3sleep30-21swapper/309:52:563
293812580,3sleep30-21swapper/307:52:563
293812580,3sleep30-21swapper/307:52:563
277032530,4sleep30-21swapper/312:07:553
277032530,4sleep30-21swapper/312:07:553
199132500,2chrt0-21swapper/311:47:453
199132500,2chrt0-21swapper/311:47:453
199132500,2chrt0-21swapper/311:47:453
14431994938,9cyclictest700-21192.168.115.40-manager07:49:151
14431994938,9cyclictest700-21192.168.115.40-manager07:49:151
45592480,3sleep20-21swapper/209:38:032
45592480,3sleep20-21swapper/209:38:032
45592480,3sleep20-21swapper/209:38:032
282782480,3sleep10-21swapper/112:08:021
282782480,3sleep10-21swapper/112:08:021
282782480,3sleep10-21swapper/112:08:021
14431994839,7cyclictest700-21192.168.115.40-manager07:39:381
14431994834,11cyclictest700-21192.168.115.40-manager12:38:481
14431994834,11cyclictest700-21192.168.115.40-manager12:38:481
207822470,3chrt0-21swapper/007:28:050
207822470,3chrt0-21swapper/007:28:050
207822470,3chrt0-21swapper/007:28:050
14431994738,7cyclictest700-21192.168.115.40-manager12:27:211
14431994738,7cyclictest700-21192.168.115.40-manager12:27:211
14431994738,7cyclictest700-21192.168.115.40-manager12:27:211
14431994721,16cyclictest32643-21taskset08:01:051
14431994636,7cyclictest700-21192.168.115.40-manager10:34:321
14431994636,7cyclictest700-21192.168.115.40-manager10:34:321
14431994633,11cyclictest700-21192.168.115.40-manager12:30:091
14431994633,11cyclictest700-21192.168.115.40-manager12:30:091
14431994620,15cyclictest11004-21taskset09:57:061
14431994620,15cyclictest11004-21taskset09:57:061
326442450,3sleep1281ktimers/109:27:571
326442450,3sleep1281ktimers/109:27:571
326442450,3sleep1281ktimers/109:27:571
14431994535,7cyclictest700-21192.168.115.40-manager07:29:051
14431994535,7cyclictest700-21192.168.115.40-manager07:29:051
14431994535,7cyclictest700-21192.168.115.40-manager07:29:051
14431994534,9cyclictest700-21192.168.115.40-manager12:36:521
14431994534,9cyclictest700-21192.168.115.40-manager12:36:521
14431994534,9cyclictest700-21192.168.115.40-manager12:36:521
14431994533,9cyclictest700-21192.168.115.40-manager10:56:481
14431994533,9cyclictest700-21192.168.115.40-manager10:56:481
14431994532,10cyclictest700-21192.168.115.40-manager11:54:391
14431994532,10cyclictest700-21192.168.115.40-manager11:54:391
14431994521,13cyclictest11293-21taskset08:28:231
14431994521,13cyclictest11293-21taskset08:28:231
14431994435,7cyclictest700-21192.168.115.40-manager07:47:131
14431994435,7cyclictest700-21192.168.115.40-manager07:47:131
14431994435,7cyclictest700-21192.168.115.40-manager07:47:131
14431994434,7cyclictest700-21192.168.115.40-manager11:02:491
14431994434,7cyclictest700-21192.168.115.40-manager11:02:491
14431994434,7cyclictest700-21192.168.115.40-manager11:02:491
14431994433,9cyclictest700-21192.168.115.40-manager11:04:081
14431994433,9cyclictest700-21192.168.115.40-manager11:04:081
14431994433,9cyclictest700-21192.168.115.40-manager07:37:421
14431994432,10cyclictest700-21192.168.115.40-manager12:16:501
14431994432,10cyclictest700-21192.168.115.40-manager12:16:501
14431994420,15cyclictest14002-21taskset11:29:321
14431994420,15cyclictest14002-21taskset11:29:321
14431994420,15cyclictest14002-21taskset11:29:321
14431994419,11cyclictest27088-21chrt12:04:311
14431994419,11cyclictest27088-21chrt12:04:311
14431994417,11cyclictest2401-21latency_hist08:07:511
14431994417,11cyclictest2401-21latency_hist08:07:511
14431994417,11cyclictest21192-21date08:57:511
14431994417,11cyclictest21192-21date08:57:511
48202430,1sleep00-21swapper/009:38:050
48202430,1sleep00-21swapper/009:38:050
48202430,1sleep00-21swapper/009:38:050
225542430,3sleep00-21swapper/007:33:030
14431994334,6cyclictest700-21192.168.115.40-manager11:57:541
14431994334,6cyclictest700-21192.168.115.40-manager11:57:541
14431994333,8cyclictest0-21swapper/108:23:141
14431994333,8cyclictest0-21swapper/108:23:141
14431994332,9cyclictest700-21192.168.115.40-manager10:50:521
14431994332,9cyclictest700-21192.168.115.40-manager10:50:521
14431994332,9cyclictest700-21192.168.115.40-manager10:50:521
14431994329,12cyclictest700-21192.168.115.40-manager12:19:351
14431994329,12cyclictest700-21192.168.115.40-manager12:19:351
14431994320,14cyclictest15917-21taskset11:35:061
14431994320,14cyclictest15917-21taskset11:35:061
14431994319,7cyclictest5229-21taskset09:40:171
14431994319,7cyclictest5229-21taskset09:40:171
14431994319,7cyclictest5229-21taskset09:40:171
31922420,3sleep20-21swapper/212:28:002
31922420,3sleep20-21swapper/212:28:002
14431994233,7cyclictest700-21192.168.115.40-manager07:53:391
14431994233,7cyclictest700-21192.168.115.40-manager07:53:391
14431994233,7cyclictest700-21192.168.115.40-manager07:27:131
14431994233,7cyclictest700-21192.168.115.40-manager07:27:131
14431994230,10cyclictest0-21swapper/108:59:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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