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2023-03-27 - 12:52

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 
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ARM TI AM3354 @800 MHz, Linux 4.18.7-rt5 (Profile)

Latency plot of shadow in rack #9, slot #8
Data to construct the above plot have been generated using the RT test utility cyclictest.
Command line: cyclictest -l50000000 -m -n -a0 -t1 -p99 -i400 -h400 -q
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 Fri Jan 06, 2023 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
820502570,0irq/47-4a1000004810-1kworker/u3:607:05:550
81950960,0irq/46-4a10000014531-21runrttasks11:15:480
1044929613,0sleep010453-21memory10:10:550
82050950,0irq/47-4a10000018211-21ssh12:20:230
1455229511,0sleep014561-21ssh10:18:010
82050940,0irq/47-4a10000010268-21ssh12:05:580
82050930,0irq/47-4a10000015381-21ssh12:15:260
81950930,0irq/46-4a1000008576-21sh11:05:280
81950930,0irq/46-4a1000004831-21which11:56:110
82050920,0irq/47-4a10000027978-21sshd08:23:310
82050920,0irq/47-4a10000023633-21ssh11:31:320
82050910,0irq/47-4a1000002578-21kworker/u2:107:20:150
82050910,0irq/47-4a10000023764-21ssh12:30:110
82050910,0irq/47-4a10000020995-21ssh12:25:160
82050900,0irq/47-4a10000028586-21ssh09:45:280
82050890,0irq/47-4a1000008704-21ssh12:03:060
82050890,0irq/47-4a1000005956-21apt-get09:00:160
82050890,0irq/47-4a10000025793-21ssh09:40:240
82050890,0irq/47-4a10000013049-21kworker/u2:311:13:280
82050880,0irq/47-4a10000032552-21kworker/u2:1211:50:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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