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2025-12-05 - 09:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 rack1slot6s.osadl.org (updated Fri Dec 05, 2025 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
53109910132,10cyclictest23502-21wc21:37:261
243799880,4rtkit-daemon2436-21rtkit-daemon18:47:340
273862850,5sleep041ktimersoftd/022:52:280
35622830,5sleep33565-21unixbench_singl22:02:333
5307996925,37cyclictest18330-21grep19:12:230
5307996925,37cyclictest18330-21grep19:12:230
5307996818,33cyclictest0-21swapper/019:07:320
5307996815,46cyclictest0-21swapper/023:32:080
35962680,9sleep1531099cyclictest19:47:371
5307996620,40cyclictest0-21swapper/021:35:560
5307996620,26cyclictest1369-21runrttasks21:01:180
5307996517,28cyclictest186051munin-node20:22:170
5307996417,29cyclictest0-21swapper/021:07:280
5307996416,40cyclictest0-21swapper/000:09:090
5307996416,40cyclictest0-21swapper/000:09:090
5307996414,44cyclictest0-21swapper/019:32:080
5307996323,33cyclictest21434-21unixbench_multi23:47:270
5307996317,26cyclictest0-21swapper/023:03:210
5307996219,26cyclictest22177-21aten_r1power_cu21:37:080
5307996218,37cyclictest0-21swapper/022:07:280
5307996217,26cyclictest0-21swapper/018:52:280
5307996215,40cyclictest0-21swapper/023:37:060
5307996215,40cyclictest0-21swapper/021:27:280
5307996214,32cyclictest0-21swapper/020:17:140
5307996213,30cyclictest0-21swapper/018:57:140
5307996124,12cyclictest28130-21aten2.4-expect22:57:060
5307996118,35cyclictest1243-21snmpd22:05:230
5307996117,38cyclictest0-21swapper/021:47:120
5307996115,30cyclictest0-21swapper/020:47:110
5307996114,40cyclictest0-21swapper/021:42:110
5307996113,40cyclictest0-21swapper/019:52:130
5307996113,32cyclictest0-21swapper/019:42:350
530799609,34cyclictest0-21swapper/019:17:340
530799609,34cyclictest0-21swapper/019:17:340
5307996025,27cyclictest24198-21gltestperf22:47:190
5307996016,36cyclictest5130-21munin-run23:16:530
5307996013,40cyclictest0-21swapper/023:56:530
5307996013,32cyclictest0-21swapper/021:57:210
5307996012,17cyclictest0-21swapper/021:22:280
5307996012,17cyclictest0-21swapper/021:22:280
5307995919,14cyclictest30472-21latency_hist20:47:010
5307995918,25cyclictest12281-21expr20:07:270
5307995916,28cyclictest0-21swapper/023:08:200
5307995913,38cyclictest0-21swapper/023:17:150
5307995818,34cyclictest1243-21snmpd23:59:080
5307995817,25cyclictest4060-21munin-run19:52:020
5307995813,39cyclictest0-21swapper/020:02:360
5307995812,39cyclictest11377-21munin-node22:22:150
5307995812,27cyclictest0-21swapper/019:27:030
5307995741,10cyclictest27739-21grep00:02:160
5307995739,11cyclictest13026-21grep19:02:170
5307995716,26cyclictest13763-21munin-node22:27:210
5307995714,37cyclictest0-21swapper/022:46:090
5307995714,37cyclictest0-21swapper/022:46:090
5307995714,28cyclictest1243-21snmpd21:53:480
5307995712,38cyclictest0-21swapper/000:16:530
5307995712,30cyclictest0-21swapper/021:18:420
5307995711,28cyclictest0-21swapper/020:37:170
5307995711,28cyclictest0-21swapper/020:37:170
243799570,5rtkit-daemon2436-21rtkit-daemon23:11:542
240222573,46sleep124123-21fschecks_time22:47:181
5310995628,10cyclictest30482-21needreboot00:07:191
5310995628,10cyclictest30482-21needreboot00:07:191
530799568,32cyclictest0-21swapper/019:27:150
5307995636,14cyclictest0-21swapper/021:12:120
5307995618,12cyclictest8708-21chrt20:00:300
5307995618,12cyclictest8708-21chrt20:00:300
5307995615,34cyclictest2836-21idleruntime-cro20:56:580
5307995613,30cyclictest0-21swapper/022:33:540
531599553,45cyclictest10202-21telnet23:27:053
531599553,45cyclictest10202-21telnet23:27:053
531599553,43cyclictest1243-21snmpd21:58:483
5310995516,23cyclictest14094-21rt-features19:02:321
530799559,39cyclictest0-21swapper/021:02:160
5307995535,14cyclictest0-21swapper/020:32:230
5307995533,17cyclictest1369-21runrttasks23:42:080
5307995524,15cyclictest0-21swapper/023:23:320
5307995522,27cyclictest6934-21grep22:12:110
5307995519,21cyclictest1243-21snmpd22:18:510
5307995510,37cyclictest0-21swapper/019:37:150
243799550,5rtkit-daemon2436-21rtkit-daemon23:51:523
243799550,5rtkit-daemon2436-21rtkit-daemon23:42:303
531099544,27cyclictest0-21swapper/119:33:281
5310995426,13cyclictest0-21swapper/122:02:161
5310995425,14cyclictest0-21swapper/120:32:201
5307995427,21cyclictest0-21swapper/018:47:050
5307995412,35cyclictest0-21swapper/022:37:250
243799540,6rtkit-daemon2436-21rtkit-daemon00:12:143
222992543,11sleep10-21swapper/120:27:321
222482542,45sleep122315-21processes22:42:271
222482542,45sleep122315-21processes22:42:271
5315995335,10cyclictest7030-21grep23:17:273
5315995334,12cyclictest15759-21fschecks_time19:07:213
531599533,42cyclictest21024-21stty20:27:153
5314995338,9cyclictest26218-21grep23:57:272
5314995337,10cyclictest19396-21grep20:22:212
531099537,29cyclictest0-21swapper/122:27:301
531099535,30cyclictest0-21swapper/121:52:231
531099534,30cyclictest0-21swapper/100:12:251
5310995324,13cyclictest0-21swapper/122:32:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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