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2025-12-23 - 13:22

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 Tue Dec 23, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2485991100,11rtkit-daemon0-21swapper/119:34:501
2485991100,11rtkit-daemon0-21swapper/119:34:501
2485991060,8rtkit-daemon0-21swapper/121:09:241
2485991010,6rtkit-daemon0-21swapper/120:41:551
2485991000,8rtkit-daemon10923-21awk00:01:021
2485991000,6rtkit-daemon0-21swapper/122:56:571
248599990,6rtkit-daemon5035-21proc_pri20:26:101
248599980,6rtkit-daemon23592-21head23:20:561
248599960,6rtkit-daemon7003-21munin-node20:31:031
248599950,6rtkit-daemon0-21swapper/122:54:271
2747499944,34cyclictest0-21swapper/023:30:560
248599940,6rtkit-daemon0-21swapper/119:37:571
27476999210,76cyclictest1419-21runrttasks21:40:402
248599920,7rtkit-daemon0-21swapper/122:22:581
248599920,7rtkit-daemon0-21swapper/122:22:581
248599920,6rtkit-daemon0-21swapper/123:30:261
248599920,6rtkit-daemon0-21swapper/123:20:261
248599920,6rtkit-daemon0-21swapper/122:43:271
2747499914,30cyclictest0-21swapper/019:30:440
27474999118,20cyclictest0-21swapper/000:06:030
27476999018,47cyclictest0-21swapper/223:48:452
27476999018,47cyclictest0-21swapper/223:48:452
27474999035,48cyclictest24832-21grep22:15:590
2747699884,13cyclictest0-21swapper/220:26:062
2747499884,9cyclictest14253-21yum-updatesd-he19:40:450
2747499874,27cyclictest0-21swapper/022:51:000
2747499874,26cyclictest0-21swapper/022:48:460
2747699864,59cyclictest0-21swapper/222:02:572
2747699864,13cyclictest0-21swapper/223:55:532
2747699864,13cyclictest0-21swapper/223:40:482
2747499864,34cyclictest0-21swapper/020:09:280
2747499864,33cyclictest0-21swapper/000:20:460
2747499864,25cyclictest0-21swapper/020:30:550
2747499864,12cyclictest0-21swapper/021:00:590
2747499863,21cyclictest4120-21timerwakeupswit21:31:100
2747499854,28cyclictest0-21swapper/022:40:510
2747499854,26cyclictest0-21swapper/000:20:330
2747499854,12cyclictest0-21swapper/020:40:580
27474998517,12cyclictest0-21swapper/023:04:070
27474998517,12cyclictest0-21swapper/023:04:070
27474998517,12cyclictest0-21swapper/020:25:540
248599850,30rtkit-daemon16843-21aten_r1power_fr00:15:461
2747699845,12cyclictest0-21swapper/220:15:562
2747699845,12cyclictest0-21swapper/220:15:562
2747699844,57cyclictest0-21swapper/223:33:272
2747699844,12cyclictest0-21swapper/221:21:062
2747699844,11cyclictest0-21swapper/221:55:512
2747699843,9cyclictest31599-21unixbench-2d23:36:072
2747699843,9cyclictest31599-21unixbench-2d23:36:072
2747499844,33cyclictest0-21swapper/023:44:170
2747499844,28cyclictest0-21swapper/023:20:590
2747499844,28cyclictest0-21swapper/020:51:000
2747499844,28cyclictest0-21swapper/019:50:530
2747499844,24cyclictest0-21swapper/021:10:180
2747499844,23cyclictest0-21swapper/020:55:530
2747499844,23cyclictest0-21swapper/020:55:530
2747499844,12cyclictest0-21swapper/021:40:530
2747499843,23cyclictest14410-21taskset00:10:460
27474998427,11cyclictest22737-21cat19:56:080
2747699835,12cyclictest0-21swapper/223:24:112
2747699834,58cyclictest0-21swapper/220:40:562
2747699834,13cyclictest0-21swapper/223:51:032
2747699834,13cyclictest0-21swapper/221:09:252
2747699834,12cyclictest0-21swapper/221:00:542
2747699834,12cyclictest0-21swapper/219:56:062
2747699834,12cyclictest0-21swapper/219:01:102
27476998316,43cyclictest0-21swapper/220:12:392
27476998311,46cyclictest0-21swapper/220:06:152
2747499834,32cyclictest0-21swapper/021:46:070
2747499834,12cyclictest0-21swapper/000:26:080
27474998323,10cyclictest10427-21grep00:00:530
248599830,27rtkit-daemon5788-21gltestperf19:21:051
248599830,26rtkit-daemon0-21swapper/023:50:551
2747699824,12cyclictest0-21swapper/221:25:532
2747699824,12cyclictest0-21swapper/221:15:402
2747699824,12cyclictest0-21swapper/219:21:152
27476998239,36cyclictest32013-21grep22:30:572
2747699823,10cyclictest11646-21gltestperf22:55:582
27476998218,41cyclictest3650-21munin-node22:40:522
27476998215,45cyclictest1287-21snmpd22:23:432
27476998215,45cyclictest1287-21snmpd22:23:432
2747499824,24cyclictest0-21swapper/022:10:530
27474998227,9cyclictest464-21grep20:16:140
27474998227,9cyclictest464-21grep20:16:140
248599820,31rtkit-daemon8085-21fschecks_time19:26:051
248599820,30rtkit-daemon0-21swapper/000:26:081
248599820,28rtkit-daemon19249-21nfs_client23:11:041
248599820,27rtkit-daemon0-21swapper/023:46:021
248599820,27rtkit-daemon0-21swapper/023:46:021
248599820,26rtkit-daemon0-21swapper/019:41:051
2747699815,65cyclictest1419-21runrttasks19:06:362
2747699814,62cyclictest0-21swapper/221:45:512
2747699814,12cyclictest0-21swapper/220:55:542
2747699814,12cyclictest0-21swapper/220:55:542
2747699814,12cyclictest0-21swapper/220:51:002
2747699814,12cyclictest0-21swapper/219:26:042
2747499814,31cyclictest0-21swapper/023:35:580
2747499814,31cyclictest0-21swapper/023:35:580
2747499814,27cyclictest0-21swapper/021:27:520
2747499814,25cyclictest0-21swapper/023:50:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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