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2026-09-18 - 09:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack7slot4s.osadl.org (updated Fri Sep 18, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12664996540,17cyclictest35966irq/58-eth021:15:123
1264699591,47cyclictest21081-21ssh23:45:121
1265699561,3cyclictest0-21swapper/221:45:132
1265699561,3cyclictest0-21swapper/220:15:142
1265699554,42cyclictest18243-21ssh22:50:142
1265699554,42cyclictest18243-21ssh22:50:132
1265699501,43cyclictest10741-21ssh00:15:122
1265699491,2cyclictest0-21swapper/220:05:132
1265699471,2cyclictest0-21swapper/222:55:142
1264699451,20cyclictest769-21apt-get20:05:121
1265699431,3cyclictest0-21swapper/220:55:132
1264699430,35cyclictest6793-21ssh23:55:131
1265699420,2cyclictest0-21swapper/220:50:122
1265699411,3cyclictest11951-21apt-get23:40:142
1265699410,2cyclictest0-21swapper/200:05:142
1265699401,2cyclictest9173-21apt-get22:45:132
1265699400,9cyclictest29501-21ntpq21:05:252
1265699400,2cyclictest0-21swapper/220:25:122
1266499391,34cyclictest0-21swapper/322:45:153
1266499391,34cyclictest0-21swapper/321:35:123
1265699392,1cyclictest0-21swapper/200:35:132
1265699391,3cyclictest0-21swapper/220:35:142
1265699391,3cyclictest0-21swapper/200:00:142
1265699391,2cyclictest0-21swapper/223:25:112
1265699391,2cyclictest0-21swapper/222:05:132
1265699381,6cyclictest0-21swapper/219:40:122
1265699381,3cyclictest0-21swapper/221:15:122
1265699381,2cyclictest0-21swapper/220:00:112
1265699381,2cyclictest0-21swapper/200:20:142
1264699382,5cyclictest0-21swapper/123:07:581
1266499373,29cyclictest35966irq/58-eth000:15:133
1266499371,2cyclictest0-21swapper/321:40:133
1265699371,33cyclictest14547-21head22:10:292
1265699371,32cyclictest0-21swapper/221:25:132
1265699371,2cyclictest0-21swapper/223:55:122
1265699371,2cyclictest0-21swapper/222:20:132
1265699371,2cyclictest0-21swapper/219:20:122
1265699370,2cyclictest27346irq/40-dwc2_hso19:55:122
1265699370,2cyclictest0-21swapper/222:40:152
1264699371,7cyclictest28820-21sed20:00:181
1266499361,29cyclictest0-21swapper/323:35:123
1265699366,23cyclictest17003-21/usr/sbin/munin23:05:272
1265699361,3cyclictest0-21swapper/221:40:142
1265699361,31cyclictest1042-21ls22:05:012
1265699361,2cyclictest0-21swapper/219:25:132
1265699361,2cyclictest0-21swapper/219:25:122
1265699360,2cyclictest30162-21ssh23:50:152
1265699360,2cyclictest0-21swapper/223:35:102
1265699360,2cyclictest0-21swapper/223:10:122
1264699368,19cyclictest21-21ksoftirqd/123:20:131
1264699360,11cyclictest27213-21apt-get19:25:131
1264699360,11cyclictest27213-21apt-get19:25:121
1265699351,2cyclictest0-21swapper/219:10:122
1265699351,24cyclictest27927-21kthreadcore23:30:212
1265699350,6cyclictest27346irq/40-dwc2_hso20:40:132
1264699355,6cyclictest3516-21irqrtprio23:35:171
1264699351,9cyclictest32174-21kthreadcore20:35:211
1264699351,9cyclictest1358-21grep21:45:291
1264699351,8cyclictest18664-21cat22:30:331
1264699351,25cyclictest5150-21ssh22:25:111
1265699341,3cyclictest0-21swapper/222:25:102
1265699341,3cyclictest0-21swapper/220:45:142
1265699341,30cyclictest4223-21grep21:30:202
1265699341,30cyclictest0-21swapper/219:35:122
1265699341,2cyclictest0-21swapper/223:20:132
1265699341,29cyclictest32030-21/usr/sbin/munin19:30:112
1265699340,9cyclictest28153-21cat22:35:332
1264699341,9cyclictest22695-21kthreadcore22:15:241
1264699341,9cyclictest17063-21kthreadcore00:35:211
1264699341,9cyclictest13330-21kthreadcore23:40:201
1264699341,8cyclictest4540-21tr21:30:191
1264699341,8cyclictest19785-21/usr/sbin/munin00:20:271
1264699341,7cyclictest5978-21sed00:30:171
1264699341,7cyclictest13407-21kthreadcore21:35:201
1266499331,25cyclictest0-21swapper/322:55:133
1265699331,3cyclictest0-21swapper/220:10:122
1265699331,3cyclictest0-21swapper/219:45:132
1265699331,29cyclictest854-21sshd20:23:492
1265699330,7cyclictest26526-21rm22:18:082
1265699330,30cyclictest19878-21ssh22:31:162
1265699330,2cyclictest0-21swapper/200:30:272
1264699337,3cyclictest25148-21sed22:00:181
1264699331,9cyclictest25118-21sort00:05:161
1264699331,9cyclictest16765-21cut19:45:211
1264699331,8cyclictest4246-21unixbench_singl22:40:301
1264699331,8cyclictest20079-21ssh00:00:331
1264699331,7cyclictest22780-21irqrtprio23:10:171
1264699331,7cyclictest19558-21latency_hist00:20:021
1264699331,24cyclictest1707-21ssh00:10:151
1264699331,10cyclictest29122-21kthreadcore21:05:211
1264699330,9cyclictest8289-21kthreadcore21:50:201
1264699330,9cyclictest2336-21ssh23:15:221
1266499322,17cyclictest35966irq/58-eth023:30:133
1265699321,3cyclictest0-21swapper/221:50:102
1265699321,28cyclictest19686-21tr19:50:182
1265699321,22cyclictest18136-21cut19:15:192
1265699321,22cyclictest15278-21awk21:35:242
1265699320,23cyclictest16596-21kthreadcore21:55:202
1264699325,6cyclictest9583-21cat20:10:291
1264699324,5cyclictest21886-21kthreadcore21:40:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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