[petsc-users] memory speed & the speed of sparse matrix computation

[Matthew Knepley]

On Sun, Jun 15, 2014 at 3:32 PM, Xiao, Jianjun (IKET) <jianjun.xiao at kit.edu>
wrote:

> Hello,
>
> In PETSc FAQ, I found such a statement below:
>
> This is because the speed of sparse matrix computations is almost totally
> determined by the speed of the memory, not the speed of the CPU.
>
> I am not an expert in matrix solving. Could anybody explain why the memory
> speed is so critical for the speed of sparse matrix computation? Is there
> any reference?
>

Yes, http://www.mcs.anl.gov/~kaushik/Papers/pcfd99_gkks.pdf

  Matt


> Thank you.
>
> Best regards
> JJ




-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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