[Trilinos-Users] VbrMatrix RAM usage

[Baker, Christopher G.]

andrea,

some of the functionality of FEVbrMatrix is available in
Tpetra::CrsMatrix. Specifically, you can contribute elements to
off-processor rows via insertGlobalValues().

chris

On 3/4/11 2:19 PM, "Andrea Zonca" <zonca at deepspace.ucsb.edu> wrote:

>hi,
>I am really sorry to bug you again but this is really a showstopper for
>my work.
>I continued my debugging on the Carver [1] cluster, with a different
>compiler (PGI),
>with different trilinos version, 10.4.0, getting the same results, a
>VBR matrix storing 1.5 million doubles (about 115 MB)
>has a memory usage of about 500MB per processor when using 2 processors.
>Could somebody please spend 10 minutes testing my very simple code in [2]
>and
>at least tell me if it is just me or you get the same results?
>I was wondering whether I should try Tpetra, however I need the
>functionality of FEVbrMatrix (setting elements on different
>processors) that is not available in Tpetra.
>thanks,
>andrea zonca
>
>[1] http://www.nersc.gov/nusers/systems/carver/
>[2] https://gist.github.com/848310
>
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