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2025-12-07 - 12:06

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 Sun Dec 07, 2025 00:39:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
318180799533,23cyclictest657-21snmpd21:04:192
3181805995339,7cyclictest151ktimers/019:49:240
3181805995234,8cyclictest12450irq/32-eth022:59:210
3181805995234,8cyclictest12450irq/32-eth022:59:210
318180799512,25cyclictest3346021-21ssh00:09:292
3181807994940,6cyclictest1-21systemd00:00:022
3181807994939,7cyclictest3217789-21diskmemload21:10:022
3181806994840,4cyclictest0-21swapper/122:34:201
3181807994741,3cyclictest0-21swapper/222:59:132
3181807994741,3cyclictest0-21swapper/222:59:132
3181807994636,6cyclictest3299929-21systemd-run23:05:012
3181807994621,6cyclictest3184827-21kworker/u8:9+xprtiod19:45:012
3181807994621,6cyclictest3184827-21kworker/u8:9+xprtiod19:45:012
3181805994631,5cyclictest3196815-21systemd-run20:00:020
3181806994534,7cyclictest421-21avahi-daemon23:40:131
3181807994433,4cyclictest0-21swapper/223:44:262
3181805994418,7cyclictest3355206-21sh00:22:040
3181805994417,10cyclictest3222581-21sh21:16:130
3181807994335,5cyclictest422-21dbus-daemon00:30:012
3181807994335,5cyclictest422-21dbus-daemon00:30:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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