RE: [GD-General] Assistance with VTune results required

[Barstow J. <JBa...@uk...>]

> > hall.dll			35%
> > 
> > That 35% in hall.dll breaks down to
> > 	READ_PORT_ULONG
> > and
> > 	HalRequestlpi
> > (among some others)
> 
> A wild guess: "hall" ~= "hardware abstraction layer <something>"
> 
> Another guess: the time is spent waiting for the graphics card to
> complete some operations.  I.e. your CPU has more graphics commands
> for your GPU, but has to wait for the GPU input queue to have some
> room before it can write the new commands.  Meanwhile the GPU is busy
> filling pixels.
> 
> Try rendering to a smaller window to see if the time proportions
> change.

Sorry, I made a typo; it is indeed hal.dll (the kernal hardware abstraction
layer)
I ran the initial test @ 400 x 300 x 16bit windowed.

I've subsequently disabled rendering altogether (the device->Present still
operative)
and sound and dplay and dinput, and the spike is still there.

However, switching to fullscreen and the READ_PORT_ULONG disappears.
(HalRequestlpi is still there.)