By: Robert Myers (rbmyersusa.delete@this.gmail.com), October 17, 2012 4:34 am
Room: Moderated Discussions
anon (anon.delete@this.anon.com) on October 17, 2012 1:17 am wrote:
>
> Exactly. This is why
> low bandwidth, high latency memory and communications is not the problem, but
> the *solution*. Together with caches and changed software assumptions, of
> course.
>
Not to mention changed physics. If you can find an advanced physics text that ultimately does not lean heavily on the ability to go back and forth with facility between physical and momentum space (or whatever you choose to call it) using the transform that diagonalizes the momentum operator (the derivative), I'll be impressed. Since you seem to think that caches and changed software assumptions can address all problems of importance, you may have to be told explicitly that the transform in question is the Fourier transform. The last time I was paying close attention, Blue Gene could use all of 512 of its tens of thousands of processors effectively in doing a volumetric FFT. I'll say more later in the day.
> Declaring the solution to in fact be the problem and vowing to do
> away with it just leaves you holding the bigger problem. Handwaving about
> "streaming" or "optical" does not solve the problem. People need something that
> works now.
If wishes were horses and all that.
Robert.
>
> Exactly. This is why
> low bandwidth, high latency memory and communications is not the problem, but
> the *solution*. Together with caches and changed software assumptions, of
> course.
>
Not to mention changed physics. If you can find an advanced physics text that ultimately does not lean heavily on the ability to go back and forth with facility between physical and momentum space (or whatever you choose to call it) using the transform that diagonalizes the momentum operator (the derivative), I'll be impressed. Since you seem to think that caches and changed software assumptions can address all problems of importance, you may have to be told explicitly that the transform in question is the Fourier transform. The last time I was paying close attention, Blue Gene could use all of 512 of its tens of thousands of processors effectively in doing a volumetric FFT. I'll say more later in the day.
> Declaring the solution to in fact be the problem and vowing to do
> away with it just leaves you holding the bigger problem. Handwaving about
> "streaming" or "optical" does not solve the problem. People need something that
> works now.
If wishes were horses and all that.
Robert.
