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2026-06-09 - 14:14

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 Tue Jun 09, 2026 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
351501920,0irq/20-4900000018893-21kworker/0:119:07:590
82050860,0irq/47-4a10000021165-21sshd19:15:150
82050820,0irq/47-4a10000025749-21idleruntime-cro19:45:010
82050820,0irq/47-4a10000022585-21cron19:25:010
81950820,0irq/46-4a10000018776-21apt-get22:35:310
82050810,0irq/47-4a10000015059-21idleruntime-cro22:10:020
82050810,0irq/47-4a10000012086-21snmpd21:27:310
82050810,0irq/47-4a10000012086-21snmpd19:57:090
82050800,0irq/47-4a10000032635-21sshd00:04:170
82050800,0irq/47-4a10000030937-21apt20:20:010
82050800,0irq/47-4a10000022090-21kworker/u2:319:30:080
82050800,0irq/47-4a10000017302-21idleruntime-cro22:25:010
82050800,0irq/47-4a1000001515-21latency_hist20:40:030
82050800,0irq/47-4a10000012086-21snmpd20:02:100
82050790,0irq/47-4a1000003892-21apt20:55:020
82050790,0irq/47-4a100000342-21sshd20:32:160
82050790,0irq/47-4a10000024999-21run-parts19:40:020
82050790,0irq/47-4a10000012086-21snmpd22:42:510
82050790,0irq/47-4a1000001015-21cron00:10:000
18412790,0sleep032744-21kworker/u2:420:42:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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