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2025-09-15 - 21:58

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 50 highest latencies:
System rack9slot8s.osadl.org (updated Mon Sep 15, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818502020,0irq/46-4a10000029462-21kworker/0:307:07:040
81850850,0irq/46-4a10000017862-21sshd11:29:140
81950820,0irq/47-4a1000005275-21ssh11:02:320
81850820,0irq/46-4a10000026198-21sshd10:38:130
81950810,0irq/47-4a1000008593-21sshd12:18:160
81950810,0irq/47-4a10000027641-21kworker/u2:311:13:430
81950810,0irq/47-4a10000027641-21kworker/u2:310:44:280
81950810,0irq/47-4a10000016017-21kworker/u2:910:16:550
71382807,0sleep07143-21ssh11:06:280
81950790,0irq/47-4a1000005581-21ssh12:11:490
81950790,0irq/47-4a10000022773-21kworker/u2:410:31:140
81950790,0irq/47-4a10000013637-21ssh11:20:080
81950780,0irq/47-4a1000006405-21kworker/u2:310:09:580
81950780,0irq/47-4a1000005925-21sshd07:58:070
81950780,0irq/47-4a10000031722-21kworker/u2:110:52:420
81950780,0irq/47-4a10000030900-21ssh11:56:450
81950780,0irq/47-4a10000026167-21kworker/u2:111:51:100
81950780,0irq/47-4a10000014075-21kworker/u2:711:35:230
81950780,0irq/47-4a10000013814-21ssh10:11:590
81950770,0irq/47-4a10000027121-21ssh11:48:500
81950770,0irq/47-4a10000022389-21kworker/u2:309:45:470
81950770,0irq/47-4a10000020217-21ssh10:25:260
81950770,0irq/47-4a10000017402-21ssh12:36:470
81950760,0irq/47-4a100000498-21ssh12:01:030
81950760,0irq/47-4a10000028276-21ssh09:33:450
81950760,0irq/47-4a10000019625-21ssh11:32:550
81950750,0irq/47-4a10000025277-21cron11:44:580
81950750,0irq/47-4a10000023045-21kworker/u2:207:14:560
81950750,0irq/47-4a10000012623-21ssh12:26:420
81850750,0irq/46-4a10000022677-21ssh09:21:470
101750,0ktimersoftd/02735-21diskmemload10:57:110
81950740,0irq/47-4a1000001105-1kworker/u3:207:29:550
81950740,0irq/47-4a10000010206-21kworker/u2:112:23:070
81850740,0irq/46-4a1000005643-21kworker/0:108:15:240
81850740,0irq/46-4a10000024828-21kworker/u2:009:27:040
327592740,0chrt32021-21kworker/u2:407:21:000
181452747,0sleep018150-21ssh10:21:010
81950730,0irq/47-4a10000014901-21cron12:08:590
81850730,0irq/46-4a10000029664-1kworker/u3:109:37:190
81850730,0irq/46-4a10000017728-21ssh09:11:220
101730,0ktimersoftd/08875-21ssh10:01:190
101730,0ktimersoftd/015245-21ssh12:32:150
81950720,0irq/47-4a1000004485-21kworker/u2:109:52:210
81950720,0irq/47-4a10000030058-1kworker/u3:110:47:480
81950720,0irq/47-4a10000013774-21apt-get08:50:230
81850720,0irq/46-4a10000011998-21ssh11:16:480
101720,0ktimersoftd/0905-21sh09:44:280
81950710,0irq/47-4a1000008195-21runrttasks08:13:280
81950710,0irq/47-4a100000560-21kswapd007:30:200
81850710,0irq/46-4a1000006919-21munin-run08:04:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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