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2025-05-05 - 01:11

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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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 May 04, 2025 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501810,0irq/47-4a10000025795-21runrttasks07:07:580
81850790,0irq/46-4a10000029538-21ssh12:36:550
81850770,0irq/46-4a1000006100-21ssh10:20:020
81850770,0irq/46-4a10000030773-21ssh11:24:120
81850770,0irq/46-4a10000029819-21rm09:56:150
81850760,0irq/46-4a10000027799-21ssh09:50:560
81850760,0irq/46-4a10000016240-21rm09:20:260
81850750,0irq/46-4a1000003274-21ssh10:12:010
81850750,0irq/46-4a1000002280-21runrttasks11:40:300
81850750,0irq/46-4a10000022064-21rm09:35:280
81850750,0irq/46-4a10000018373-21rm09:25:440
81850740,0irq/46-4a1000007412-21chrt10:23:150
81850740,0irq/46-4a1000003891-21runrttasks11:37:070
81850740,0irq/46-4a10000032548-21rm11:28:220
81850740,0irq/46-4a10000026891-21runrttasks07:14:100
81850740,0irq/46-4a10000017053-21rm10:49:190
81850740,0irq/46-4a10000014568-21ssh10:42:440
81850740,0irq/46-4a10000014480-21ssh12:01:500
81850740,0irq/46-4a10000012312-21diskmemload11:00:170
81850740,0irq/46-4a10000012312-21diskmemload10:04:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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