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

[murat keçeli]

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On Sun, Jun 15, 2014 at 7:18 PM, Matthew Knepley <knepley at gmail.com> wrote:
> 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