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2026-05-03 - 07:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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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.

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 50 highest latencies:
System rackeslot6s.osadl.org (updated Sun May 03, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1021550991225,3cyclictest1030289-21apt-get20:00:010
1021555999111,49cyclictest1042402-21/usr/sbin/munin21:10:181
1021555997825,22cyclictest0-21swapper/119:30:011
102155599734,30cyclictest1061011-21kworker/u8:3+ext4-rsv-conversion23:05:051
102155099712,66cyclictest23850irq/422-mmc122:05:050
1021555996925,23cyclictest0-21swapper/100:35:181
102155599669,33cyclictest0-21swapper/121:55:001
102155599654,40cyclictest0-21swapper/121:50:011
102155599654,40cyclictest0-21swapper/121:50:011
1021555996136,19cyclictest0-21swapper/119:30:131
1021555996136,19cyclictest0-21swapper/119:30:131
1021560995943,11cyclictest1061037-21sendmail23:00:002
1021555995938,15cyclictest0-21swapper/121:40:121
1021555995932,13cyclictest0-21swapper/123:00:121
1021550995844,6cyclictest167350irq/118-8000000.ethernet-tx023:10:130
1021555995737,14cyclictest0-21swapper/121:55:121
1021555995735,10cyclictest0-21swapper/122:50:131
102155099571,5cyclictest0-21swapper/022:00:110
102156099563,20cyclictest1058331-21apt-get22:45:022
1021555995640,11cyclictest1044944-21apt-get21:25:151
1021555995638,10cyclictest1027972-21/usr/sbin/munin19:45:311
1021555995634,15cyclictest0-21swapper/122:40:101
1021555995631,16cyclictest1029245-21/usr/sbin/munin19:50:271
1021555995629,14cyclictest0-21swapper/119:15:131
1021555995629,14cyclictest0-21swapper/119:15:121
1021555995536,14cyclictest0-21swapper/100:20:131
1021555995534,13cyclictest1072394-21/usr/sbin/munin00:05:251
1021555995533,14cyclictest1021543-21cyclictest21:15:131
1021555995440,9cyclictest0-21swapper/100:10:111
1021560995345,5cyclictest1050636-21munin-plugin-st22:00:002
1021555995337,8cyclictest1026276-21/usr/sbin/munin19:35:301
1021555995335,11cyclictest1024121-21/usr/sbin/munin19:20:271
1021555995331,14cyclictest1064785-21/usr/sbin/munin23:20:171
1021555995331,13cyclictest1067847-21/usr/sbin/munin23:35:291
1021555995331,13cyclictest1064095-21/usr/sbin/munin23:15:211
1021555995323,24cyclictest1660-21snmpd23:33:051
102155599528,21cyclictest0-21swapper/120:25:011
1021555995237,10cyclictest0-21swapper/120:50:111
1021555995229,14cyclictest1065627-21/usr/sbin/munin23:25:161
1021555995229,14cyclictest1041918-21/usr/sbin/munin21:05:271
1021555995229,14cyclictest1041918-21/usr/sbin/munin21:05:271
1021555995228,14cyclictest1074672-21/usr/sbin/munin00:15:281
1021555995228,14cyclictest1074672-21/usr/sbin/munin00:15:281
1021555995138,8cyclictest1033117-21apt-get20:15:141
1021555995138,8cyclictest0-21swapper/122:55:151
1021555995135,8cyclictest1054050-21grep22:15:291
1021555995129,11cyclictest0-21swapper/121:00:131
1021550995136,9cyclictest0-21swapper/019:10:010
102155099512,45cyclictest0-21swapper/023:45:000
1021555995042,3cyclictest1055158-21apt-get22:25:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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