tpetra: Avoid BlockCrsMatrix reallocating the import/export dualviews for the X_col_map_ MV on every call to apply.

[vbrunini]

@trilinos/tpetra

Motivation

Improving performance for SPARC, particularly in GPU builds.

Related Issues

• Closes put-issue-number-here

Stakeholder Feedback

Testing

[vbrunini]

@jhux2 @csiefer2

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Using Repos:

Repo: TRILINOS (vbrunini/Trilinos)

• Branch: tpetra_blockcrs_apply_import_avoid_allocs
• SHA: a67c809
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Pull Request Author: vbrunini

[trilinos-autotester]

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CDash Test Results for PR# 13475.

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[jhux2]

This looks good to me.

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Status Flag 'Pre-Merge Inspection' - SUCCESS: The last commit to this Pull Request has been INSPECTED AND APPROVED by [ jhux2 ]!

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