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2025-09-19 - 02:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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 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 rack9slot8s.osadl.org (updated Thu Sep 18, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501750,0irq/46-4a10000011247-21kworker/0:007:08:020
122199911829,0cyclictest25182-21runrttasks08:33:010
122199911713,0cyclictest13450-21sshd12:00:390
122199911611,0cyclictest32138-21ssh09:13:010
122199911529,0cyclictest26761-21ssh10:10:130
12219991138,0cyclictest1915-21ssh09:17:400
122199911331,0cyclictest17247-21apt-config09:49:590
122199911330,0cyclictest14828-21rs:main0
122199911229,0cyclictest12531-21ssh10:49:260
122199911213,0cyclictest20048-21munin-run07:59:540
122199911128,0cyclictest20206-21readlink07:59:580
122199911124,0cyclictest7677-21munin-plugin-st09:29:540
122199911110,0cyclictest17741-21ssh09:50:510
122199911045,0cyclictest81850irq/46-4a10000011:42:140
122199911043,0cyclictest81850irq/46-4a10000012:35:020
122199911029,0cyclictest7354-21ssh11:47:440
122199911028,0cyclictest26193-21sendmail-msp08:39:540
122199910930,0cyclictest7810-21ssh10:39:200
122199910923,0cyclictest18752-21ssh11:02:370
122199910920,0cyclictest30860-21sshd11:28:380
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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