iMX6Q graphics performance

[Jasper Potts]

We were getting good performance with 1080p for JavaOne keynote Car demo last year. Though not as good as Odroid U3

Jasper

Sent from my iPhone

> On Jan 28, 2015, at 8:47 AM, David Hill <David.Hill at oracle.com> wrote:
> 
>> On 1/28/15, 2:09 AM, Prasant Jalan wrote:
>> Few more questions about your Boundary Devices iMX6 Quad:
>> - Amount of RAM/memory in your iMX6 system?
>> - iMX6 Single Core Clock speed (0.8 GHz, 1 GHz or 1.2 GHz)
>> - Which javaFX version did you use to get the above measurements (if you recollect)?
> 
> I am using: http://boundarydevices.com/product/sabre-lite-imx6-sbc/
> 
> Specs are on the page. It is a Quad, so 4 cores @ 1GHz, 1GB memory.
> 
> OS is a Ubuntu base distro, provided by BoundaryDevices, though I have a similar setup using Yocto that I have not been able to see any FX differences.
> 
> ubuntu at oracle:~$ cat /proc/cpuinfo
> processor    : 0
> model name    : ARMv7 Processor rev 10 (v7l)
> BogoMIPS    : 790.52
> 
> My monitor is connected with HDMI, 720P. Note that 1080p will likely be slower - more data to move even with a GPU.
> 
> Using JDK 8u6 + OpenJFX build (which is my development setup). There are some improvements that are present in OpenJFX that are not in 8u6, and that certainly might affect performance. The process to build OpenJFX is here. <https://wiki.openjdk.java.net/display/OpenJFX/Building+OpenJFX>
> 
> For a simple JFX command, it is unlikely that we will require more than 2 CPU cores. One thread for the application, and another for the repainter. A more complex application with worker thread might light up more cores.
> 
> Using the top command (then hitting "1" to enable the Core usage display), I see my Industrial app using one to two cores like this:
> 
> %Cpu0  : 22.4 us,  2.0 sy,  0.0 ni, 75.5 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
> %Cpu1  :  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
> %Cpu2  :  0.3 us,  0.3 sy,  0.0 ni, 99.3 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
> %Cpu3  : 66.8 us,  4.3 sy,  0.0 ni, 28.9 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
> 
> Occasionally just one core like this, probably when we are computing a change in the Scene.
> 
> %Cpu0  :  8.0 us,  1.3 sy,  0.0 ni, 90.6 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
> %Cpu1  :  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
> %Cpu2  : 83.8 us,  2.6 sy,  0.0 ni, 13.5 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
> %Cpu3  :  0.7 us,  0.0 sy,  0.0 ni, 99.3 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
> 
> and of course occasionally 3 cores - I expect that is when top is running :-)
> 
> Dave
> 
> 
> -- 
> David Hill<David.Hill at Oracle.com>
> Java Embedded Development
> 
> "A man's feet should be planted in his country, but his eyes should survey the world."
> -- George Santayana (1863 - 1952)
>