[Trilinos-Users] VbrMatrix RAM usage

[David Cole]

On Tue, Mar 1, 2011 at 1:50 PM, Andrea Zonca <zonca at deepspace.ucsb.edu> wrote:
> hi Alan,
>
> On Tue, Mar 1, 2011 at 10:34, Williams, Alan B <william at sandia.gov> wrote:
>> Are you saying that each processor has 500,000x1x3 doubles, ==1,500,000 doubles?
>
> yes, exactly,
> thanks,
> andrea
>
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Which OS and compiler are you using? Are you building a Debug or Release build?

The per-allocation overhead of a Debug build with Microsoft Visual
Studio is near 40 bytes per allocation because of memory tracking
debug allocator data structures.

Is each row a separate allocation, or is there a contiguous block of
doubles in the internals of this code?