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2025-12-13 - 05:19

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 Fri Dec 12, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501840,0irq/47-4a10000025744-21sshd19:08:150
25988999372,0cyclictest6945-21munin-run20:34:550
25988999351,0cyclictest28843-21munin-run21:44:550
25988998964,0cyclictest25471-21ssh23:55:000
25988998955,0cyclictest14344-21cron00:40:010
25988998860,0cyclictest23287-21ssh22:41:350
25988998859,0cyclictest20494-21ssh23:44:290
25988998665,0cyclictest12019-21ssh23:26:300
25988998659,0cyclictest30896-21sshd00:06:170
25988998652,0cyclictest14874-21ssh23:32:370
25988998568,0cyclictest3082-21sh21:59:010
25988998558,0cyclictest24695-21sshd21:36:040
25988998554,0cyclictest11475-21kworker/u2:122:32:140
25988998468,0cyclictest14826-21in:imuxsock20:03:410
25988998463,0cyclictest10978-21ssh00:32:470
25988998459,0cyclictest22517-21kworker/u2:321:54:560
25988998451,0cyclictest30812-21ssh22:57:330
25988998448,0cyclictest10659-21munin-run20:59:550
25988998362,0cyclictest20970-21ssh22:36:390
25988998361,0cyclictest10612-21ssh23:23:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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