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2026-09-05 - 19:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, 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 rack8slot4s.osadl.org (updated Fri Sep 04, 2026 12:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4787942271185,25sleep40-21swapper/407:05:564
4788762248175,22sleep30-21swapper/307:07:083
4790182244176,21sleep50-21swapper/507:09:115
4788802244171,22sleep70-21swapper/707:07:127
4788002244174,22sleep10-21swapper/107:06:011
4789622243180,51sleep60-21swapper/607:08:246
4790332220164,45sleep20-21swapper/207:09:242
4790042207173,23sleep00-21swapper/007:08:580
47929599270,2cyclictest81-21ksoftirqd/612:25:136
47929599260,24cyclictest521286-21awk08:20:016
47929199250,24cyclictest626347-21sh11:15:175
47929199250,24cyclictest530178-21sleep08:35:025
47928499250,24cyclictest596778-21ntpq10:25:192
47927899250,24cyclictest610032-21sed10:50:010
47927899250,24cyclictest610032-21sed10:50:010
479296992423,1cyclictest576120-21ntpq09:50:207
479295992420,3cyclictest615676-21apt-get11:00:016
47929599240,3cyclictest659900-21idleruntime-cro12:15:016
47929599240,3cyclictest487610-21ntpq07:20:186
47929599240,23cyclictest81-21ksoftirqd/608:30:136
479291992423,1cyclictest554180-21apt-get09:15:115
47929199240,23cyclictest0-21swapper/508:45:025
479289992423,1cyclictest509903-21apt-get08:00:134
47928999240,24cyclictest629203-21ntpq11:20:204
47928999240,23cyclictest616141-21apt-get11:00:124
47928999240,23cyclictest606790-21sh10:45:014
47928699240,23cyclictest636328-21munin-run11:35:013
47928499240,0cyclictest0-21swapper/207:20:132
47928199240,23cyclictest609809-21appstreamcli10:50:031
47928199240,23cyclictest609809-21appstreamcli10:50:031
47928199240,23cyclictest0-21swapper/109:25:181
47927899240,1cyclictest662815-21apt-get12:19:100
47927899240,0cyclictest0-21swapper/009:00:110
479295992322,1cyclictest0-21swapper/610:50:226
479295992322,1cyclictest0-21swapper/610:50:226
479295992321,1cyclictest0-21swapper/612:19:116
479295992320,3cyclictest480890-21ntpq07:10:186
47929599230,22cyclictest81-21ksoftirqd/610:10:176
47929599230,22cyclictest629261-21ntpq11:20:206
47929599230,22cyclictest562605-21munin-run09:30:016
47929599230,22cyclictest497729-21appstreamcli07:40:026
47929599230,22cyclictest0-21swapper/609:15:116
47929599230,22cyclictest0-21swapper/609:00:016
47929599230,22cyclictest0-21swapper/608:25:136
479291992321,1cyclictest662836-21dpkg-deb12:19:115
479291992321,1cyclictest550793-21cron09:10:015
479291992321,1cyclictest0-21swapper/511:10:015
47929199230,22cyclictest536524-21apt-get08:45:135
47929199230,22cyclictest0-21swapper/511:20:215
47929199230,0cyclictest0-21swapper/511:00:125
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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