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2025-11-20 - 12:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackcslot7s.osadl.org (updated Thu Nov 20, 2025 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
95507521040,5sleep0943366-21kworker/0:120:20:330
162399880,8rtkit-daemon1622-21rtkit-daemon19:26:330
939157998324,42cyclictest855-21dbus-daemon21:21:562
939161998115,40cyclictest1031191-21/usr/sbin/munin00:00:313
162399760,45rtkit-daemon1753-21gnome-shell00:04:091
939157997422,37cyclictest1753-21gnome-shell20:34:442
93893927454,13sleep00-21swapper/019:09:130
939161997315,38cyclictest1069-21runrttasks20:08:113
93915799731,46cyclictest980255-21taskset21:35:092
93916199721,46cyclictest941212-21taskset19:22:103
93916199721,46cyclictest941212-21taskset19:22:103
93916199711,37cyclictest1005662-21/usr/sbin/munin22:45:213
93916199701,45cyclictest1045012-21taskset00:38:413
93916199701,44cyclictest1022065-21taskset23:32:483
93915799702,49cyclictest1753-21gnome-shell23:51:352
93890127038,26sleep20-21swapper/219:08:432
93915799691,36cyclictest1004694-21taskset22:42:252
93899026947,15sleep10-21swapper/119:09:541
93916199672,46cyclictest1753-21gnome-shell22:15:583
93916199671,46cyclictest966377-21taskset20:55:033
93916199671,38cyclictest1008056-21seq22:51:093
93916199671,38cyclictest1008056-21seq22:51:093
93915799672,45cyclictest1753-21gnome-shell00:30:372
93915799671,49cyclictest994420-40apt-check22:15:192
93893726739,22sleep30-21swapper/319:09:123
93916199661,37cyclictest951665-21seq20:12:593
93916199652,42cyclictest1753-21gnome-shell23:08:553
93916199652,40cyclictest1753-21gnome-shell00:19:573
93916199651,42cyclictest1753-21gnome-shell23:39:373
93916199651,39cyclictest941698-21taskset19:25:243
93916199642,44cyclictest1753-21gnome-shell19:17:553
93916199642,43cyclictest1753-21gnome-shell21:17:433
93916199642,42cyclictest1753-21gnome-shell20:28:433
93916199642,42cyclictest1753-21gnome-shell20:28:433
93916199641,44cyclictest997417-21taskset22:21:563
93915799644,38cyclictest1044159-21kernelversion00:35:222
939157996426,33cyclictest997666-21apt-get22:25:012
93916199632,36cyclictest965817-21colord-sane20:51:203
93915799631,35cyclictest1021664-21/usr/sbin/munin23:30:302
93915799631,34cyclictest1031795-21load00:00:222
93916199621,38cyclictest1011491-21seq23:00:433
93916199621,36cyclictest1004816-21seq22:43:593
93915799621,50cyclictest175350gnome-shell23:15:162
93915799621,41cyclictest2197014-21PK-Backend20:25:222
93915799621,41cyclictest2197014-21PK-Backend20:25:222
939151996221,36cyclictest986804-21sshd21:53:210
93916199612,36cyclictest982378-21/usr/sbin/munin21:40:133
93916199612,32cyclictest1753-21gnome-shell00:23:063
93916199611,36cyclictest1041008-21seq00:25:433
93916199611,35cyclictest1034191-21seq00:07:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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