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2025-12-06 - 10:13

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 Sat Dec 06, 2025 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8820997444,25cyclictest29566irq/58-eth023:35:133
880899591,7cyclictest0-21swapper/220:50:132
880099586,8cyclictest131rcu_preempt20:30:151
878999505,38cyclictest22738-21ssh23:05:140
880899483,29cyclictest21356-21ssh21:45:132
880099482,37cyclictest22409-21ssh23:25:171
878999481,43cyclictest24731-21apt-get20:00:130
878999481,37cyclictest14429-21ssh23:20:170
880099473,35cyclictest14154-21ssh22:00:121
878999471,42cyclictest3271-21apt-get20:45:100
878999471,41cyclictest17773-21apt-get21:00:150
878999464,31cyclictest6979-21ssh22:15:170
878999464,31cyclictest6979-21ssh22:15:170
878999461,42cyclictest0-21swapper/020:55:150
878999461,42cyclictest0-21swapper/020:55:140
880099456,29cyclictest12941-21ssh21:40:111
878999451,41cyclictest15055-21apt-get22:20:160
878999451,38cyclictest6789-21apt-get20:15:140
880099442,34cyclictest28576-21ssh21:30:131
878999441,38cyclictest3376-21apt-get21:15:130
878999441,38cyclictest27523-21apt-get21:10:140
878999441,37cyclictest5816-21apt-get23:55:140
878999441,37cyclictest0-21swapper/021:25:150
878999440,40cyclictest15064-21apt-get19:50:130
878999421,37cyclictest31229-21apt-get22:50:140
878999421,37cyclictest0-21swapper/020:30:140
878999421,35cyclictest14151-21apt-get22:00:130
878999421,26cyclictest14986-21df22:40:180
878999420,30cyclictest5344-21ssh23:54:590
878999420,27cyclictest22303-21ssh23:25:100
878999420,26cyclictest2317-21ssh21:32:270
878999411,36cyclictest0-21swapper/022:30:140
878999410,37cyclictest22586-21apt-get21:05:150
882099403,21cyclictest29566irq/58-eth021:40:113
880899402,22cyclictest22185-21sh23:04:412
878999401,34cyclictest0-21swapper/021:55:130
878999401,34cyclictest0-21swapper/020:10:150
878999391,23cyclictest0-21swapper/021:40:150
880899382,29cyclictest19448-21ssh23:41:432
880899382,28cyclictest5030-21ssh22:52:402
880899381,30cyclictest21912-21ssh23:45:142
880099381,32cyclictest31233-21ssh22:50:131
878999381,34cyclictest30886-21ssh22:10:150
878999381,34cyclictest23162-21apt-get22:25:170
878999381,34cyclictest2070-21apt-get00:35:140
878999381,34cyclictest0-21swapper/019:35:130
878999380,26cyclictest11615-21ssh21:38:400
880099373,26cyclictest29839-21ssh21:50:121
878999374,29cyclictest0-21swapper/000:10:130
878999371,32cyclictest0-21swapper/020:05:110
878999371,31cyclictest0-21swapper/023:45:140
878999371,30cyclictest0-21swapper/000:00:140
878999371,24cyclictest11594-21ssh00:18:300
878999371,24cyclictest11594-21ssh00:18:290
878999370,28cyclictest28099-21ssh22:06:380
878999370,22cyclictest3892-21sh21:52:480
878999361,31cyclictest6911-21apt-get22:55:140
878999361,31cyclictest20548-21ssh00:25:150
882099353,16cyclictest29566irq/58-eth021:10:143
880899352,21cyclictest14413-21ssh23:20:162
880099352,28cyclictest0-21swapper/122:45:121
878999351,20cyclictest1-21systemd23:12:060
878999351,20cyclictest1-21systemd23:12:050
880899343,21cyclictest31053-21ssh22:30:142
880899343,17cyclictest26346irq/40-dwc2_hso23:50:122
878999341,30cyclictest2117-21cat23:30:310
878999341,30cyclictest0-21swapper/000:20:120
878999341,29cyclictest9662-21cut19:10:200
878999341,29cyclictest0-21swapper/022:46:440
878999341,29cyclictest0-21swapper/020:20:130
882099332,16cyclictest29566irq/58-eth023:25:163
878999331,28cyclictest16700-21/usr/sbin/munin20:25:190
878999331,27cyclictest0-21swapper/021:20:140
878999330,30cyclictest8520-21kthreadcore22:35:210
878999330,29cyclictest10096-21/usr/sbin/munin23:15:290
878999330,21cyclictest27332-21sshd00:06:410
878999321,28cyclictest0-21swapper/023:00:130
878999321,27cyclictest13719-21apt-get19:15:120
878999321,27cyclictest0-21swapper/019:55:120
878999321,26cyclictest0-21swapper/019:20:120
878999321,23cyclictest21339-21apt-get21:45:110
878999320,29cyclictest26712-21irqstats20:35:180
880899315,19cyclictest5922-21ssh23:35:122
8800993123,4cyclictest0-21swapper/120:45:101
8789993115,13cyclictest530-21usb-storage19:25:120
878999311,27cyclictest8205-21/usr/sbin/munin20:50:170
878999311,26cyclictest5924-21apt-get23:35:140
880899302,17cyclictest30317-21ssh23:30:142
880899302,16cyclictest6928-21ssh22:55:152
880099302,22cyclictest6594-21ssh22:35:151
8800993016,7cyclictest0-21swapper/121:00:131
878999301,26cyclictest5403-21munin-node19:40:120
878999301,26cyclictest31517-21unixbench_multi00:30:320
878999301,26cyclictest31020-21df_inode20:40:150
878999301,20cyclictest0-21swapper/019:45:130
878999300,28cyclictest20067-21ssh23:42:480
882099295,16cyclictest29566irq/58-eth022:45:113
882099294,16cyclictest29566irq/58-eth022:50:153
880899292,20cyclictest0-21swapper/222:40:162
880099292,17cyclictest6917-21ssh22:55:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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