Re: [vizstack-users] viz-desktop should now work with bezels

[Kumar, S. <shr...@hp...>]

Hi Simon,

Thanks for the confirmation. 

And here is a last goodie (for the time being at least!) : I've added another property to 
tiled displays(TD), called "clip_last_block". This is a two element vector that makes the 
TD logic skip configuration of display(s) on the last row and/or column.

With this, you will be able to create a 3x2 desktop using the your 4 GPUs. Here is how :
 
  - Define a 4x2 Tiled display that uses the 4 GPUs. This would mean a block_display_layout of [2,1]

  - Set clip_last_block to [1,None]. This will skip configuration of the second display on 
    the second GPU in each row.  This needs to be done manually in the config file.

  - Restart the SSM, try out the tiled display.

Here is an example 3x1 desktop TD in my lab:
----------------
<resourceGroup>
        <name>3x1-clipped</name>
        <handler>tiled_display</handler>
        <description>2x2</description>
        <handler_params>
                block_type='gpu';
                num_blocks=[2,1];
                block_display_layout=[2, 1];
                group_blocks=[2, 1];
                combine_displays=True;
                display_device='HP LP2065';
                display_mode='1600x1200_60';
                framelock=False;
                clip_last_block=[1,None];
        </handler_params>
        <resources>
                <reslist>
                        <res><server><hostname>localhost</hostname></server></res>
                        <res><gpu><hostname>localhost</hostname><index>0</index></gpu></res>
                        <res><gpu><hostname>localhost</hostname><index>1</index></gpu></res>
                        <res><keyboard><index>0</index><hostname>localhost</hostname></keyboard></res>
                        <res><mouse><index>0</index><hostname>localhost</hostname></mouse></res>
                </reslist>
        </resources>
</resourceGroup>
-----------------

In your case, you would have num_blocks = [2,2], and two more GPUs in the reslist.

This was surprisingly easy to implement, and quite generic - a tiled display can now consist
of odd number of rows/columns with all GPU capabilities being utilized. I'm sure this mechanism 
would suit many users. 

To use : update svn, shree branch.

----

Overall, what does this mean for you ? You can define the 3x2 tiled display using your 4 GPUs.
Users can run viz-desktop by logging into the console. No other customization required !

HTH
-- Shree

-----Original Message-----
From: Sim...@cs... [mailto:Sim...@cs...] 
Sent: Thursday, May 27, 2010 4:34 AM
To: viz...@li...
Subject: Re: [vizstack-users] viz-desktop should now work with bezels

Tested, and it seems to be working nicely - no panning, everything's behaving as expected. Thanks for this!

Simon 

> -----Original Message-----
> From: Kumar, Shree [mailto:shr...@hp...] 
> Sent: Tuesday, 25 May 2010 9:48 PM
> To: viz...@li...
> Subject: [vizstack-users] viz-desktop should now work with bezels
> 
> Hi Simon,
> 
> I had raised an issue with nvidia about the desktop bezel 
> problem. They have come back and clarified that it is not a 
> bug, but the expected behaviour. However, good things have 
> come out of the interaction. They have suggested an alternate 
> way of configuring, and I have fixed my code appropriately.
> 
> If you update the shree branch, and try the viz-desktop 
> script with -B, you should get a desktop cofigured correctly. 
> Can you try it and confirm that it works ? 
> 
> Thanks
> -- Shree
> 
> --------------------------------------------------------------
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