DirectX: the order of the game loop, first draw and then process the input?

Question

I just read the DirectX documentation and met something interesting on the IDirect3DDevice9 :: BeginScene page :

To enable maximum parallelism between the processor and the graphics accelerator, it is advantageous to call IDirect3DDevice9 :: EndScene , as far ahead of the calling gift as possible.

I'm used to writing my game loop to process input, etc., and then draw. Do I have it back? Perhaps the game loop should be something like this: (semi-pseudo-code, obviously)

while(running) {
    d3ddev->Clear(...);
    d3ddev->BeginScene();
    // draw things
    d3ddev->EndScene();

    // handle input
    // do any other processing
    // play sounds, etc.

    d3ddev->Present(NULL, NULL, NULL, NULL);
}

According to this documentation proposal, this loop will “include maximum parallelism”.

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Answer 1

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while True:
   Simulate()
   FlipBuffers()
   Render()

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Answer 2

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http://www.tilander.org/aurora/comp/gdc2009_Tilander_Filippov_SPU.pdf

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Answer 3

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