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2026-04-11 - 20:28

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 Sat Apr 11, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12712620,1sleep11288-21latency_hist07:36:571
38062560,3chrt0-21swapper/210:36:542
38062560,3chrt0-21swapper/210:36:542
185952550,9sleep018600-21gltestperf08:22:100
185952550,9sleep018600-21gltestperf08:22:100
54872510,2sleep00-21swapper/007:47:080
24762995127,8cyclictest700-21192.168.115.40-manager09:18:161
24762995127,8cyclictest700-21192.168.115.40-manager09:18:161
24762994920,10cyclictest13004-21taskset11:00:151
24762994920,10cyclictest13004-21taskset11:00:151
24762994920,10cyclictest13004-21taskset11:00:151
24762994920,10cyclictest13004-21taskset11:00:151
24762994917,13cyclictest3185-21seq12:01:461
24762994917,13cyclictest3185-21seq12:01:461
24762994917,13cyclictest3185-21seq12:01:461
203392490,3chrt24758-21cyclictest09:52:151
203392490,3chrt24758-21cyclictest09:52:151
24762994823,8cyclictest32122-21seq10:22:451
24762994823,8cyclictest32122-21seq10:22:451
24762994822,10cyclictest19238-21taskset09:50:321
24762994822,10cyclictest19238-21taskset09:50:321
24762994723,7cyclictest6721-21taskset12:09:021
24762994723,7cyclictest6721-21taskset12:09:021
24762994722,9cyclictest14867-21seq11:04:581
24762994722,9cyclictest14867-21seq11:04:581
24762994722,10cyclictest29862-21taskset07:26:461
24762994722,10cyclictest29862-21taskset07:26:461
24762994721,9cyclictest12338-21taskset12:24:011
24762994721,9cyclictest12338-21taskset12:24:011
24762994721,10cyclictest2818-21taskset07:38:201
24762994721,10cyclictest2818-21taskset07:38:201
24762994721,10cyclictest2818-21taskset07:38:201
24762994720,9cyclictest10563-21taskset12:20:281
24762994720,9cyclictest10563-21taskset12:20:281
24762994720,9cyclictest10563-21taskset12:20:281
24762994720,10cyclictest15373-21taskset09:38:591
24762994720,10cyclictest15373-21taskset09:38:591
24762994720,10cyclictest15373-21taskset09:38:591
24762994719,11cyclictest19906-21taskset08:26:391
24762994719,11cyclictest19906-21taskset08:26:391
24762994719,10cyclictest13516-21taskset09:34:041
24762994718,11cyclictest24482-21taskset11:32:001
24762994718,11cyclictest24482-21taskset11:32:001
24762994636,8cyclictest700-21192.168.115.40-manager11:37:441
24762994636,8cyclictest700-21192.168.115.40-manager11:37:441
24762994636,8cyclictest700-21192.168.115.40-manager11:37:441
24762994623,6cyclictest749-21runrttasks12:34:231
24762994620,7cyclictest7289-21seq10:43:361
24762994620,7cyclictest7289-21seq10:43:361
24762994620,7cyclictest7289-21seq10:43:361
24762994619,9cyclictest14231-21taskset12:29:271
24762994619,9cyclictest14231-21taskset12:29:271
24762994619,10cyclictest28626-21taskset10:16:061
24762994619,10cyclictest28626-21taskset10:16:061
24762994618,11cyclictest17283-21runrttasks09:44:181
24762994618,11cyclictest17283-21runrttasks09:44:181
24762994523,10cyclictest26488-21taskset10:07:341
24762994523,10cyclictest26488-21taskset10:07:341
24762994520,9cyclictest31542-21runrttasks11:48:041
24762994520,9cyclictest31542-21runrttasks11:48:041
24762994520,8cyclictest12293-21seq08:04:531
24762994520,8cyclictest12293-21seq08:04:531
24762994518,11cyclictest3687-21seq10:35:281
24762994518,11cyclictest3687-21seq10:35:281
24762994517,10cyclictest25883-21runrttasks11:32:281
24762994517,10cyclictest25883-21runrttasks11:32:281
24762994517,10cyclictest25883-21runrttasks11:32:281
24762994423,7cyclictest4984-21taskset12:05:401
24762994423,7cyclictest4984-21taskset12:05:401
24762994423,7cyclictest4984-21taskset12:05:401
24762994421,10cyclictest21676-21taskset08:30:251
24762994421,10cyclictest21676-21taskset08:30:251
24762994420,7cyclictest4763-21taskset07:44:071
24762994420,7cyclictest4763-21taskset07:44:071
24762994418,10cyclictest22264-21seq11:23:561
24762994418,10cyclictest22264-21seq11:23:561
24762994418,10cyclictest22264-21seq11:23:561
24762994417,12cyclictest11101-21runrttasks10:54:411
24762994417,12cyclictest11101-21runrttasks10:54:411
24762994321,9cyclictest25353-21taskset08:39:411
24762994320,9cyclictest10336-21taskset07:58:571
24762994320,9cyclictest10336-21taskset07:58:571
24762994320,9cyclictest10336-21taskset07:58:571
24762994320,11cyclictest2675-21cat09:07:031
24762994320,11cyclictest2675-21cat09:07:031
24762994315,12cyclictest749-21runrttasks12:38:201
24762994315,12cyclictest749-21runrttasks12:38:201
24762994315,12cyclictest749-21runrttasks12:38:201
25732420,2sleep02752-21grep11:57:170
25732420,2sleep02752-21grep11:57:170
25732420,2sleep02752-21grep11:57:170
24762994224,6cyclictest5522-21seq10:40:061
24762994224,6cyclictest5522-21seq10:40:061
24762994221,8cyclictest29653-21seq11:42:451
24762994221,8cyclictest29653-21seq11:42:451
24762994219,12cyclictest29006-21taskset08:48:301
24762994219,12cyclictest29006-21taskset08:48:301
24762994124,7cyclictest31661-21taskset07:30:561
24762994121,9cyclictest16705-21seq11:09:411
24762994120,9cyclictest401-21taskset09:00:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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