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2024-07-27 - 07:01

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 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 Sat Jul 27, 2024 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501900,0irq/46-4a10000020703-21kworker/0:119:06:020
81950850,0irq/47-4a10000019285-21rm22:49:490
81950830,0irq/47-4a10000032710-21rm23:20:290
81850820,0irq/46-4a10000021423-21sendmail21:40:030
81850810,0irq/46-4a1000001597-21runrttasks00:39:440
81850800,0irq/46-4a10000022901-21ssh21:43:180
81850800,0irq/46-4a10000015833-21runrttasks23:55:580
81950790,0irq/47-4a1000009121-21ssh23:40:360
81950790,0irq/47-4a10000026811-21awk19:40:010
81950790,0irq/47-4a10000021382-21rm22:54:440
81850790,0irq/46-4a10000030656-21ssh23:15:300
81850790,0irq/46-4a10000017984-21rm21:32:070
81850790,0irq/46-4a10000014252-21rm21:23:330
81950780,0irq/47-4a1000007711-21ssh22:22:470
81950780,0irq/47-4a100000386-21ssh22:05:580
81950780,0irq/47-4a10000025902-21ssh21:50:040
81950780,0irq/47-4a10000013349-21ssh22:35:490
81850780,0irq/46-4a10000030905-21rm22:01:300
81850780,0irq/46-4a10000029246-21kworker/u2:220:00:100
81850780,0irq/46-4a10000020831-21rm00:07:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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