[eq-dev] Realisation issues

[Christian Kehl]

Dear Developers,

I started some days ago working with Equalizer. I read through the developers guide and got to compile the eqHelloWorld-Code in my IDE.

My Plan is to distribute my Rendering (done with VisLib) on my MultiGPUs. Regarding the example, I then have to replace the "frameDraw"-Code with my own things. Concerning the spec, I should open one Node with multiple pipe for this task.

Can I somehow use the configuration tool for that ? what does the configuration tool generate (and where do I have to load it then) ?

Next question is how to realize it so both GPUs compute with a 2D compound and a load-equalizer the then in off-screen buffer and then Display the result in one Window ? I know that this is then running with PBuffers or FBOs, sure ... but do I then have to write a seperate server app to display the FBOs/PBuffers while a client app is distributing the render tasks to the cores, or can this all be packed into one app and consequently avoid network transfer for now ?

I would really appriciate if somebody can perhaps help me with some little portions of knowlege so I get into that. Thanks in advance,

Chris

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[Stefan Eilemann]

On Mon, Nov 9, 2009 at 3:59 PM, Christian Kehl [via Software]
<[hidden email]> wrote:
> My Plan is to distribute my Rendering (done with VisLib) on my MultiGPUs.
> Regarding the example, I then have to replace the "frameDraw"-Code with my
> own things. Concerning the spec, I should open one Node with multiple pipe
> for this task.
>
> Can I somehow use the configuration tool for that ?

Yes, but it is fairly limited. You can try the 2D compound mode.

> what does the
> configuration tool generate (and where do I have to load it then) ?

A configuration file (see also examples/configs for more
configurations). You have to load it using '.../eqServer <config
file>', and then start the application.
Standalone configs (i.e. you only have an appNode and no nodes) can be
loaded without a server in eqPly directly: '.../eqPly <eqPly options>
-- --eq-config <config file>'

> Next question is how to realize it so both GPUs compute with a 2D compound
> and a load-equalizer the then in off-screen buffer and then Display the
> result in one Window ?

See examples/configs/2-pipe.2D.PBuffer.eqc, and simply add a
load_equalizer in the top-most compound.

> I know that this is then running with PBuffers or
> FBOs, sure ... but do I then have to write a seperate server app to display
> the FBOs/PBuffers while a client app is distributing the render tasks to the
> cores, or can this all be packed into one app and consequently avoid network
> transfer for now ?

Not sure if I understand the question, but as long as you stay on one
machine, you can handle it all from one process with multiple render
threads.



HTH,

Stefan.

---

View this message in context: Re: [eq-dev] Realisation issues
Sent from the Equalizer - Parallel Rendering mailing list archive at Nabble.com.

[Christian Kehl]

Thank you very much. Also today, I tried to get along with the eqPly-example, but it seems far to complex for the computation on one machine with multiple GPUs. I will try your way with the configuration file. The last part of your answer, I understood that it shoul be possible to realize the task with one exeutable (like in HelloWorld). I'm notsure how to do that, but I will also try to figure out that. You also publicated a White Paper about this topic (Computations on Multi-GPU mchines). How have you done it there ? Did you you seperate Server- an Client-applications/executables, or have you realized these task also with one app ?

-------- Original-Nachricht --------
> Datum: Mon, 9 Nov 2009 09:08:35 -0800 (PST)
> Von: Stefan Eilemann <eile...@gmail.com>
> An: eq-...@equalizergraphics.com
> Betreff: Re: [eq-dev] Realisation issues

> --

> View this message in context:

> http://n2.nabble.com/Realisation-issues-tp3973481p3974308.html

> Sent from the Equalizer - Parallel Rendering mailing list archive at
> Nabble.com.

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[Stefan Eilemann]

Hi Christian,

On Tue, Nov 10, 2009 at 12:04 AM, Christian Kehl <Christi...@gmx.net> wrote:
> Thank you very much. Also today, I tried to get along with the eqPly-example, but it seems far to complex for the computation on one machine with multiple GPUs.

Indeed it is. eqPly is the showcase for almost all Equalizer features.

> I will try your way with the configuration file. The last part of your answer, I understood that it shoul be possible to realize the task with one exeutable (like in HelloWorld). I'm notsure how to do that, but I will also try to figure out that.

You simple launch with the correct configuration file, e.g.:

./build/Darwin/bin/eqPly.app/Contents/MacOS/eqPly -- --eq-config
examples/configs/2-pipe.2D.PBuffer.eqc

This is a static 2D decomposition, by adding a load_equalizer you get
a load-balanced config. When running, press s for statistics and F1
for general help.

> You also publicated a White Paper about this topic (Computations on Multi-GPU mchines). How have you done it there ? Did you you seperate Server- an Client-applications/executables, or have you realized these task also with one app ?

One app (eqPly), multiple config files. Iirc the paper even mentions
the exact svn revision used.

Cheers,

Stefan.