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2026-05-25 - 01:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #7

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.

Total number of samples: 50.5 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 20 highest latencies:
System rack5slot7s.osadl.org (updated Sun May 24, 2026 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20214224632202,99sleep00-21swapper07:06:560
206009916812,130cyclictest28883-21rm08:00:440
206009916417,119cyclictest4586-21diskstats08:50:330
206009916143,23cyclictest29100-21vmstat11:16:060
206009916138,98cyclictest8492-21/usr/sbin/munin12:31:090
206009916117,119cyclictest22488-21apt10:40:020
206009916115,120cyclictest5271-21apt-get08:55:140
206009916024,27cyclictest14899-21apt-get09:55:230
206009916019,115cyclictest3560-21apt12:00:000
206009916015,119cyclictest26336-21ntp_states11:01:340
206009915918,116cyclictest25966-21apt-get07:42:030
206009915917,117cyclictest16584-21apt-get10:05:270
206009915822,29cyclictest24376-21apt-get07:35:210
206009915817,114cyclictest2766-21munin-run08:40:030
206009915732,20cyclictest25695-21munin-plugin-st11:00:010
206009915715,26cyclictest12389-21apt09:40:020
206009915612,109cyclictest22185-1kworker/u3:710:40:180
20600991559,107cyclictest18956-21sed10:16:020
206009915516,25cyclictest9993-21munin-run12:40:030
206009915514,117cyclictest32007-21apt08:20:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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