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2026-06-23 - 13:56

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 the 20 highest latencies:
System rack9slot8s.osadl.org (updated Tue Jun 23, 2026 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819502100,0irq/46-4a10000027750-21kworker/0:219:06:290
1515528213,0sleep015179-21apt-config20:50:110
82050780,0irq/47-4a10000011580-21kworker/u2:000:00:010
81950780,0irq/46-4a100000712-21sendmail19:20:020
81950780,0irq/46-4a10000025691-21munin-run22:00:030
81950780,0irq/46-4a10000016702-21cron00:30:000
297842780,0sleep026216-21kworker/u2:222:25:330
81950760,0irq/46-4a1000004042-21apt-get23:10:360
82050750,0irq/47-4a10000010795-21awk20:25:010
320922750,0chrt31228-21kworker/u2:419:15:040
94750740,0irq/33-mmc030816-1kworker/0:0H20:11:280
81950740,0irq/46-4a10000029157-21runrttasks22:21:260
81950740,0irq/46-4a10000012086-21snmpd20:27:010
249252740,0sleep023550-21kworker/u2:421:54:570
172942740,0sleep016968-21kworker/u2:200:33:470
98132730,0sleep09342-21kworker/u2:120:19:590
81950730,0irq/46-4a1000007984-21latency_hist23:35:020
81950730,0irq/46-4a1000003217-21seq23:04:230
81950730,0irq/46-4a10000031082-21apt-get22:35:270
268742730,0chrt25243-21kworker/u2:622:06:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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