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(DO NOT MERGE) - Tpetra: performance improvements to CrsMatrix::copyAndPermute - working branch #13598
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…target matrices are locally indexed
1) timers 2) batch version of Map::getGlobalElement 3) improved replaceGlobalValues 4) kokkos parallel reduce/for for the main loop over rows in CAP 5) small improvements using if constexpr()
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Until we can diagnose segfaults reported wrt PR #13598. Signed-off-by: Jonathan Hu <[email protected]>
@trilinos/tpetra
Motivation
Clients have reported copyAndPermute as a large portion of the time spent in e.g. evaluating and scattering the Jacobian in the panzer application. This PR addresses that by profiling and rewriting code, and using kokkos parallel for/reduce.
This is a work-in-progress PR solely for interacting with colleagues.
Related Issues
#13587
13587
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