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2026-04-26 - 11:01

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 Sun Apr 26, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819502430,0irq/46-4a10000012086-21snmpd19:07:550
215902857,0sleep021595-21ssh23:45:550
82050810,0irq/47-4a1000006955-21rm22:05:520
81950800,0irq/46-4a10000027237-21ssh22:49:060
82050790,0irq/47-4a100000436-21kworker/u2:100:22:140
82050790,0irq/47-4a10000015078-21apt21:15:010
82050790,0irq/47-4a10000013579-21munin-run22:20:030
81950790,0irq/46-4a10000022640-21ssh21:30:430
81950790,0irq/46-4a10000017109-21runrttasks23:36:300
81950790,0irq/46-4a10000010010-21latency_hist00:30:040
82050780,0irq/47-4a10000027653-21rm23:58:530
81950780,0irq/46-4a1000004222-21ssh23:09:110
81950780,0irq/46-4a10000019332-21kworker/u2:623:54:050
83492770,0chrt5541-21kworker/u2:520:40:100
82050770,0irq/47-4a10000031719-21kworker/u2:222:00:480
82050770,0irq/47-4a1000002872-21ssh21:57:300
82050770,0irq/47-4a10000011317-21seq21:00:120
81950770,0irq/46-4a1000003863-21runrttasks00:17:030
81950770,0irq/46-4a10000020723-21ssh21:26:430
295692770,0chrt29564-21kworker/u2:419:26:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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