[ydl-gen] Direct Rendering support for PS3

[Sanders, Rob M.]

I thought the graphics under *any* linux on the PS3 was double buffered, and 
depended on the hypervisor to pull one buffer and push that to the RSX, then 
at some point later in time pull the other buffer.  Depending on that update 
rate graphics are going to be somewhat ragged, even if glxgears is reporting
a significantly higher rate.  I've been known to be wrong though, so find a
suitablely sized grain of salt....


Rob


-----Original Message-----
From: yellowdog-general-bounces at lists.terrasoftsolutions.com on behalf of Warren Nagourney
Sent: Wed 11/28/2007 10:34 PM
To: Discussion List for General Yellow Dog Linux User Topics
Subject: Re: [ydl-gen] Direct Rendering support for PS3
 
It is claiming about 300 fps, which I take with a grain of salt. The  
gear display is a but jumpy, which the gears rotating in bursts about  
1 second apart. It is hard to believe that each burst involves 300  
frames, but it is possible.

-wn


On Nov 28, 2007, at 7:27 PM, Reese, Shawn S. wrote:

> Thank for the reply Warren,
>
> That's what I meant by direct rendering, using the graphics  
> acceleration.
>
> But you say you can run OpenGL programs at a good rate.  Could you  
> do me a favor?  Can you run the "glxgears" program, and tell me the  
> frame rate you are getting?
>
> With the direct rendering on an x86 with a Radeon 9250 I get 265  
> fps.  Without direct rendering, I only get 25 fps.
>
> With no direct rendering on a G5 PowerMac running YellowDog, using  
> a Radeon 9600, I get 70 fps.  YellowDog doesn't support direct  
> rendering for the G5, or at least I can't get the drivers right.
>
> That's what got me wondering about the PS3 graphics.  If it has  
> pretty good fps without rendering, it may be worth it to get one  
> and hope YellowDog supports those drivers later.  Or at least maybe  
> Nvidia will.
>
> Thanks again.
>
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