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Re: [Manta] Image degrades as more processors get involved!


Chronological Thread 
  • From: "Christian Odom" <cnsodom@gmail.com>
  • To: "Dirk Reiners" <dirk@infiscape.com>
  • Cc: manta@sci.utah.edu
  • Subject: Re: [Manta] Image degrades as more processors get involved!
  • Date: Wed, 5 Sep 2007 18:15:21 -0400
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On 9/5/07, Dirk Reiners <dirk@infiscape.com> wrote:

        Hi Christian,

Christian Odom wrote:
>
>
> On 9/5/07, *Solomon Boulos* <boulos@cs.utah.edu
> <mailto: boulos@cs.utah.edu>> wrote:
>
>     Do you run into the problem with -np 1? Also, would it be possible
>     to get the full copy of your camera implementation instead of just
>     makeRays (which looks okay to me).
>
>
> I am having to forward the X session over the net so it is really slow,
> but from what I can tell the image looks fine with -np 1.
>
> I have attached the current MatrixCamera class. I really need to go
> through and clean it up. Please excuse the mess.

Could you also post the piece of the NetworkUI that sets up the Camera?
I'm a little worried that there might be something in there that's not
threadsafe. We have worked under the assumption that Manta takes care of
thread-safety for the Camera, but I'm not totally sure.

Certainly. 

I have also included a picture of the output when manta is running on my laptop with only one processor.  Its an amd64.  There seems to be a little noise in the image.  A little on the sphere and a little on the bottom left of the plane.  When there are multiple processors the "noise" moves around the image.  This is not the case with only one processor.

        Dirk



--
Christian Odom
Graduate Student
Center for Advanced Computer Studies
http://www.cacs.louisiana.edu
Louisiana Immersive Technologies Enterprise
http://www.lite3d.com

Attachment: NetworkUI.cc
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Attachment: NetworkUI.h
Description: Binary data

Attachment: Screenshot.png
Description: PNG image




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