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2025-12-03 - 07:19

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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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.
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 Wed Dec 03, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13416991024,51cyclictest0-21swapper/023:59:060
1341699994,51cyclictest0-21swapper/022:59:060
1341699994,51cyclictest0-21swapper/022:59:060
13420999337,49cyclictest14713-21cat19:58:553
1342099864,13cyclictest0-21swapper/323:26:193
1342099853,32cyclictest0-21swapper/321:53:503
1342099853,12cyclictest0-21swapper/321:54:243
13420998425,10cyclictest876-21uniq19:29:153
13420998418,9cyclictest15182-21unixbench_multi23:19:203
1342099834,13cyclictest0-21swapper/319:09:273
13420998323,10cyclictest1369-21runrttasks23:49:013
13420998225,10cyclictest25759-21cpuspeed_turbos23:44:013
13420998117,11cyclictest0-21swapper/322:31:273
1342099804,22cyclictest0-21swapper/320:20:503
13420998036,39cyclictest0-21swapper/320:39:133
13420998026,44cyclictest0-21swapper/319:08:453
13420998024,9cyclictest5692-21fschecks_count00:09:023
13420998021,10cyclictest12600-21cpuspeed_turbos22:09:033
13420997935,40cyclictest0-21swapper/322:37:503
13420997931,7cyclictest1397-21munin-node22:54:043
13420997924,8cyclictest31778-21cpuspeed_turbos22:49:023
13420997923,10cyclictest27897-21aten_r1power_cu21:34:023
13420997923,10cyclictest27897-21aten_r1power_cu21:34:023
13420997922,11cyclictest0-21swapper/323:04:183
13420997918,9cyclictest18325-21munin-node21:14:213
1342099784,36cyclictest0-21swapper/320:57:063
1342099784,36cyclictest0-21swapper/320:57:063
13420997829,8cyclictest1369-21runrttasks18:50:463
13420997829,8cyclictest1369-21runrttasks18:50:463
13420997821,8cyclictest14705-21munin-node22:14:243
13420997821,8cyclictest14705-21munin-node22:14:243
1342099782,35cyclictest0-21swapper/322:44:003
13420997728,8cyclictest12515-21sensors_temp23:14:183
13420997727,7cyclictest31014-21cut19:24:133
13420997723,7cyclictest32308-21seq23:58:133
13420997721,8cyclictest1243-21snmpd21:00:573
13420997717,10cyclictest9481-21sshd19:45:133
13420997625,7cyclictest17171-21munin-node20:04:163
13420997624,8cyclictest15942-21munin-node21:09:223
13420997617,10cyclictest27957-21munin-node19:19:313
1342099745,14cyclictest0-21swapper/320:28:543
13420997430,8cyclictest19038-21gltestperf23:29:083
1342099743,15cyclictest0-21swapper/321:19:133
13420997424,9cyclictest4629-21vmstat19:34:303
13420997417,12cyclictest0-21swapper/320:13:123
1342099734,15cyclictest0-21swapper/323:09:183
13420997332,35cyclictest0-21swapper/323:35:013
1342099733,33cyclictest16051-21telnet18:54:093
13420997322,7cyclictest1243-21snmpd19:50:453
1341999733,63cyclictest0-21swapper/220:38:122
13420997234,7cyclictest244982sleep321:24:203
13420997229,10cyclictest25668-21telnet19:14:103
1342099705,15cyclictest0-21swapper/322:08:503
13420997023,8cyclictest7350-21yum-updatesd-he19:43:443
13420996930,10cyclictest0-21swapper/322:59:153
13420996930,10cyclictest0-21swapper/322:59:153
13420996927,9cyclictest0-21swapper/319:59:193
1342099683,14cyclictest0-21swapper/323:39:083
1342099683,14cyclictest0-21swapper/323:39:083
13420996826,10cyclictest0-21swapper/322:24:443
13420996824,9cyclictest0-21swapper/321:39:073
13420996821,8cyclictest2967-21cpuspeed_turbos00:04:003
13416996845,10cyclictest0-21swapper/019:44:080
1342099674,15cyclictest0-21swapper/321:44:203
13420996725,10cyclictest0-21swapper/322:23:493
13420996720,9cyclictest29166-21telnet20:29:073
1341999675,55cyclictest0-21swapper/219:54:122
237002650,6sleep023696-21cut21:24:090
1341899654,53cyclictest0-21swapper/119:24:211
1341699653,56cyclictest0-21swapper/020:29:060
1341999644,13cyclictest0-21swapper/223:38:452
1341899644,53cyclictest0-21swapper/122:19:131
1341999634,51cyclictest0-21swapper/222:14:082
1341999634,51cyclictest0-21swapper/222:14:082
73242612,51sleep00-21swapper/023:04:090
243799610,4rtkit-daemon2436-21rtkit-daemon22:12:112
1341999615,15cyclictest0-21swapper/222:34:042
1341999614,15cyclictest0-21swapper/223:44:072
1341999614,13cyclictest0-21swapper/222:04:102
13418996144,12cyclictest0-21swapper/123:09:081
1341699613,52cyclictest0-21swapper/019:24:530
83412605,47sleep20-21swapper/221:59:102
243799600,4rtkit-daemon2436-21rtkit-daemon23:07:462
243799600,4rtkit-daemon2436-21rtkit-daemon21:56:042
243799600,4rtkit-daemon2436-21rtkit-daemon19:33:472
1341999604,16cyclictest0-21swapper/222:54:172
1341999604,16cyclictest0-21swapper/222:44:042
1341999604,15cyclictest0-21swapper/222:24:182
1341899603,50cyclictest16696-21runrttasks20:00:511
1341999595,15cyclictest0-21swapper/221:05:572
1341999594,16cyclictest0-21swapper/219:44:262
1341999594,15cyclictest0-21swapper/220:04:112
1341999594,15cyclictest0-21swapper/220:00:472
1341999594,12cyclictest0-21swapper/220:23:542
13419995922,14cyclictest0-21swapper/219:49:242
1341899594,48cyclictest0-21swapper/123:38:461
1341899594,48cyclictest0-21swapper/119:14:231
1341899594,47cyclictest4073-21taskset21:49:181
13416995932,11cyclictest0-21swapper/023:33:460
1341699593,50cyclictest0-21swapper/023:34:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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