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2026-06-03 - 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 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 all highest latencies:
System rack9slot8s.osadl.org (updated Wed Jun 03, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501850,0irq/46-4a10000014236-21kworker/0:119:06:030
82050840,0irq/47-4a10000028077-21runrttasks20:29:080
82050820,0irq/47-4a10000027080-21kworker/u2:320:22:500
81950810,0irq/46-4a1000001192-21jbd2/mmcblk0p2-23:32:520
82050800,0irq/47-4a10000019369-21sshd19:31:270
82050790,0irq/47-4a10000012086-21snmpd22:03:120
81950790,0irq/46-4a10000018281-21cron22:55:000
301862790,0chrt22288-21kworker/u2:300:15:010
82050780,0irq/47-4a10000030440-21awk20:45:010
82050780,0irq/47-4a10000028543-21runrttasks00:03:460
82050780,0irq/47-4a10000011944-21kworker/u2:422:23:160
83642770,0sleep07104-21kworker/u2:721:50:090
82050770,0irq/47-4a10000032644-21sendmail21:00:010
82050770,0irq/47-4a10000032582-21sshd00:30:290
82050770,0irq/47-4a10000022758-21cron23:25:000
82050770,0irq/47-4a1000001960-21kworker/u2:121:15:300
82050760,0irq/47-4a10000026754-21runrttasks23:51:270
82050760,0irq/47-4a10000022060-21munin-run19:50:020
82050760,0irq/47-4a10000019957-21sshd23:05:290
234652760,0sleep023068-21kworker/u2:319:59:370
82050750,0irq/47-4a10000022778-21cron19:55:010
82050750,0irq/47-4a10000021268-21munin-run23:15:020
82050750,0irq/47-4a10000019462-21sshd23:02:280
82050750,0irq/47-4a10000019419-21kworker/u2:019:45:000
82050750,0irq/47-4a1000001638-21runrttasks21:09:400
82050750,0irq/47-4a10000012086-21snmpd20:07:470
74012750,0chrt2906-21kworker/u2:021:44:180
317892750,0sleep031481-21kworker/u2:120:54:120
278512750,0chrt27567-21kworker/u2:123:59:210
82050740,0irq/47-4a1000006130-21kworker/u2:221:40:000
82050740,0irq/47-4a10000024897-21sshd23:39:290
82050740,0irq/47-4a10000021550-21sshd23:16:290
82050740,0irq/47-4a1000001960-21kworker/u2:121:15:010
82050740,0irq/47-4a10000018951-21sshd22:59:290
82050740,0irq/47-4a10000017051-21runrttasks19:17:190
82050740,0irq/47-4a10000012086-21snmpd21:28:050
80652740,0sleep07853-21kworker/u2:121:48:420
313672740,0sleep022288-21kworker/u2:300:22:340
202072740,0chrt20169-21kworker/u2:219:37:150
82050730,0irq/47-4a10000026066-21kworker/u2:023:50:000
82050730,0irq/47-4a10000018672-1kworker/u3:419:30:010
82050730,0irq/47-4a10000017594-21runrttasks19:20:320
82050730,0irq/47-4a10000011954-21idleruntime-cro22:15:020
82050730,0irq/47-4a10000010831-21seq22:07:060
81950730,0irq/46-4a10000014934-21apt-get22:35:320
165332730,0sleep011944-21kworker/u2:422:44:210
159832730,0sleep015765-21kworker/u2:619:13:060
126432730,0chrt10757-21kworker/u2:122:19:390
82050720,0irq/47-4a10000032003-21kworker/u2:000:30:010
82050720,0irq/47-4a10000026131-21runrttasks20:15:340
82050720,0irq/47-4a10000023389-21runrttasks23:29:110
82050720,0irq/47-4a10000012086-21snmpd21:33:050
81950720,0irq/46-4a1000009225-1kworker/u3:022:00:020
41292720,0sleep032230-21kworker/u2:221:24:590
308932720,0chrt30468-21kworker/u2:000:19:540
307422720,0chrt30733-21kworker/u2:020:46:390
241792720,0sleep023850-21kworker/u2:720:04:110
82050710,0irq/47-4a10000025536-21sshd23:43:300
5732710,0chrt29659-21kworker/u2:321:02:070
292832710,0sleep028968-21kworker/u2:700:08:480
145962710,0sleep011944-21kworker/u2:422:32:250
136342710,0chrt11944-21kworker/u2:422:25:330
82050700,0irq/47-4a10000028693-21runrttasks20:33:100
82050700,0irq/47-4a10000015865-21kworker/u2:622:50:010
251612700,0sleep024601-21kworker/u2:020:10:140
101660,0ktimersoftd/029004-21latency_hist20:35:030
82050640,0irq/47-4a10000012086-21snmpd00:38:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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