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2025-11-27 - 09:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, 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: 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 20 highest latencies:
System rack2slot7s.osadl.org (updated Thu Nov 27, 2025 00:39:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4003184995847,5cyclictest0-21swapper/221:44:212
4003184995847,5cyclictest0-21swapper/221:44:212
4003184995141,6cyclictest4039767-21/usr/sbin/munin21:14:122
4003184994823,22cyclictest4030695-21munin-plugin-st20:50:012
4003184994823,22cyclictest4030695-21munin-plugin-st20:50:012
4003184994818,27cyclictest4122321-21sh23:00:462
4003182994833,8cyclictest12450irq/32-eth021:34:130
4003182994833,8cyclictest12450irq/32-eth021:34:130
400318499469,18cyclictest4178507-21ssh00:14:162
400318499463,8cyclictest4036129-21ntpq21:09:152
4003184994616,27cyclictest4168653-21sh00:00:242
4003184994535,6cyclictest4098618-21kworker/u8:6-events_unbound22:59:142
4003184994534,7cyclictest4044537-21latency_hist21:20:022
4003184994523,19cyclictest0-21swapper/200:00:012
4003183994537,5cyclictest4172114-21ssh00:05:011
4003183994537,3cyclictest0-21swapper/121:59:121
4003183994535,6cyclictest4082123-21/usr/sbin/munin22:09:181
4003182994535,7cyclictest4049634-21sshd21:27:110
4003182994535,7cyclictest4049634-21sshd21:27:110
400318299452,35cyclictest2199103-21cups-browsed21:09:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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