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2023-03-27 - 16:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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 Freescale i.MX535 @1000 MHz, Linux 4.19.142-rt63+ (Profile)

Latency plot of shadow in rack #4, slot #6
Data to construct the above plot have been generated using the RT test utility cyclictest.
Command line: cyclictest -l50000000 -m -n -a0 -t1 -p99 -h400 -i400 -q
Total number of samples: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rack4slot6s.osadl.org (updated Mon Mar 27, 2023 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
716322520,3sleep07166-21switchtime10:35:280
2903722520,2sleep029039-21processes12:00:260
1468322420,3sleep014681-21ntp_kernel_pll_11:05:250
3269522210,3sleep032692-21cat12:15:200
2853821520,4sleep028534-21cat12:00:010
1693821280,2sleep016940-21latency_hist11:15:010
2422821270,2sleep024229-21grep07:30:260
445421250,3sleep04455-21cat12:30:340
2223821120,5sleep022154-21/usr/sbin/munin11:35:230
2109421090,4sleep021144-21df09:25:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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