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2025-01-22 - 13:15

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 792 highest latencies:
System rack9slot8s.osadl.org (updated Wed Jan 22, 2025 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818502090,0irq/46-4a10000021368-21kworker/0:019:08:510
81950850,0irq/47-4a10000021112-21sshd23:04:130
81950840,0irq/47-4a10000028969-21rm23:23:190
81850840,0irq/46-4a1000008817-21diskmemload23:51:270
81950830,0irq/47-4a10000011928-21ssh21:17:400
81950820,0irq/47-4a10000024921-21ssh21:50:210
81950810,0irq/47-4a100000776-21ssh23:33:430
81950810,0irq/47-4a1000003368-21apt23:40:010
81950810,0irq/47-4a10000029747-21ssh23:25:050
81850810,0irq/46-4a10000015735-21munin-run00:10:020
81950800,0irq/47-4a10000026739-21ssh21:55:080
81950800,0irq/47-4a10000015254-21rm22:49:250
81850800,0irq/46-4a10000013561-21ssh22:45:030
81950790,0irq/47-4a1000006920-21ssh23:48:350
81950790,0irq/47-4a1000004984-21ssh23:43:550
81950790,0irq/47-4a10000031241-21ssh22:07:040
81950790,0irq/47-4a10000020150-21runrttasks21:38:080
81950790,0irq/47-4a10000018524-21kworker/u2:300:34:150
81850790,0irq/46-4a10000025900-21seq23:15:520
81950780,0irq/47-4a1000009519-21ssh21:11:340
81950780,0irq/47-4a1000006959-21sshd20:57:130
81950780,0irq/47-4a10000025622-21rm00:36:020
81950780,0irq/47-4a10000024598-21ssh21:49:430
81950780,0irq/47-4a10000019492-21ssh23:00:030
81950780,0irq/47-4a10000017155-21ssh21:30:220
81950780,0irq/47-4a10000010644-21ssh22:37:390
81850780,0irq/46-4a10000015069-21ssh21:25:150
63832780,0chrt5462-21kworker/u2:020:53:310
25602780,0sleep02238-21kworker/u2:222:17:020
166302780,0chrt14398-21kworker/u2:000:12:050
81950770,0irq/47-4a1000004986-21rm22:23:270
81950770,0irq/47-4a10000025111-21awk19:25:020
81950770,0irq/47-4a10000022548-21ssh23:07:430
81950770,0irq/47-4a10000022054-21rm00:25:520
81950770,0irq/47-4a10000019120-21kworker/u2:619:15:050
81950770,0irq/47-4a10000017788-21ssh00:15:050
81850770,0irq/46-4a1000003522-21apt-key20:35:120
81850770,0irq/46-4a100000349-21rm22:11:140
81850770,0irq/46-4a10000017787-21kworker/u2:323:12:590
218702770,0sleep013568-21kworker/u2:521:42:290
132922777,0sleep013298-21sh00:04:070
81950760,0irq/47-4a1000009461-21apt-get22:35:020
81950760,0irq/47-4a10000021226-21ssh00:23:540
81950760,0irq/47-4a10000016710-21ssh22:53:030
81950760,0irq/47-4a10000011174-21rm23:59:010
81850760,0irq/46-4a10000030254-21kworker/u2:220:05:100
81850760,0irq/46-4a10000029593-21ssh22:02:460
81850760,0irq/46-4a10000013568-21kworker/u2:521:24:300
322302760,0chrt30628-21kworker/u2:320:11:240
308602760,0chrt27614-21kworker/u2:620:03:470
269572760,0chrt23931-21kworker/u2:119:37:190
264532760,0chrt26088-21kworker/u2:419:34:110
81950750,0irq/47-4a10000028370-21runrttasks19:46:380
81850750,0irq/46-4a10000028065-21sh19:45:000
291512750,0chrt27613-21kworker/u2:519:52:020
10182755,0sleep01033-21latency_hist20:20:040
81950740,0irq/47-4a1000006134-21kworker/u2:522:28:340
81850740,0irq/46-4a1000002044-21kworker/u2:420:40:160
82892730,0chrt7612-21kworker/u2:621:05:530
81950730,0irq/47-4a1000002799-1kworker/u3:120:35:020
297872710,0sleep027613-21kworker/u2:519:56:150
254012710,0sleep022767-21kworker/u2:019:26:340
226062710,0sleep021255-21kworker/u2:319:10:250
81950680,0irq/47-4a1000005857-21munin-run20:50:010
101630,0ktimersoftd/01656-21chrt20:24:240
81850620,0irq/46-4a1000002042-21192.168.115.90-20:26:300
101620,0ktimersoftd/08062-21cron21:05:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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