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2026-08-07 - 06:26

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 50 highest latencies:
System rack7slot4s.osadl.org (updated Fri Aug 07, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
140099580,30cyclictest12571-21ssh23:30:120
1423995216,26cyclictest27-21ksoftirqd/222:30:132
141299461,40cyclictest4344-21apt-get20:20:131
1423994526,8cyclictest0-21swapper/221:35:122
142399451,19cyclictest0-21swapper/220:45:142
141299441,38cyclictest15967-21apt-get19:25:131
1423994331,7cyclictest7149-21apt-get23:45:132
141299432,36cyclictest11185-21apt-get19:20:141
1423994221,17cyclictest0-21swapper/222:05:112
1423994118,12cyclictest0-21swapper/219:20:132
141299411,37cyclictest13964-21apt-get20:30:131
1423994012,12cyclictest27-21ksoftirqd/200:28:012
141299402,32cyclictest12545-21apt-get23:30:131
1423993922,8cyclictest0-21swapper/223:30:122
1423993916,19cyclictest16503-21apt-get22:20:132
141299391,26cyclictest14557-21ssh22:55:121
141299390,26cyclictest13088-21sh23:46:491
142399388,21cyclictest18793-21ssh00:09:272
1423993821,13cyclictest0-21swapper/220:20:112
141299381,31cyclictest25669-21apt-get19:35:131
141299381,31cyclictest25669-21apt-get19:35:131
141299381,22cyclictest5218-21ssh23:43:081
1435993716,9cyclictest35966irq/58-eth000:25:133
1423993713,18cyclictest0-21swapper/200:30:152
141299371,33cyclictest12974-21apt-get22:00:111
141299370,32cyclictest9180-21apt-get20:25:111
140099374,29cyclictest16132-21ssh23:50:140
140099373,14cyclictest23599-21ssh23:00:130
143599363,19cyclictest35966irq/58-eth020:15:123
1423993619,13cyclictest3585-21apt-get23:25:122
141299361,21cyclictest11052-21/usr/sbin/munin22:35:261
141299361,19cyclictest19003-21ssh00:09:411
140099362,9cyclictest631-21Async09:36:310
142399356,12cyclictest6612-21ssh00:00:312
1423993524,7cyclictest28601-21ssh00:15:152
1423993514,11cyclictest0-21swapper/219:25:132
1423993513,8cyclictest18770-21ls21:25:292
1423993511,22cyclictest135-21systemd-journal23:02:402
141299351,31cyclictest2864-21apt-get19:45:111
141299351,30cyclictest27376-21missed_timers21:30:241
140099352,9cyclictest1379-21kworker/u8:000:16:440
1423993422,8cyclictest19831-21diskmemload22:35:122
1423993419,11cyclictest12980-21ssh22:00:112
141299346,13cyclictest0-21swapper/121:16:161
141299341,28cyclictest28592-21apt-get00:15:141
141299341,21cyclictest26161-21ssh21:49:011
141299341,19cyclictest11463-21ssh21:21:241
141299341,17cyclictest27321-21ssh23:36:351
141299341,17cyclictest0-21swapper/122:27:281
141299340,29cyclictest30928-21apt-get22:10:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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