gpu-direct: make it optional and have fallback solution with device-host explicit transfers#389

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svalat wants to merge 17 commits into

idefix-code:developfrom

svalat:feature/no-gpu-direct-support

Commits on Jul 8, 2026

gpu-direct: handle communications when GPU DIRECT is not there.
svalat
committed

Commits on Jul 10, 2026

gpu-direct: wrap all the internal MPI_.+ using .data() internally with idefix::MPI_ API.
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gpu-direct: Add a macro to activate to validate by forcing the transfers all time for validation purpose
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gpu-direct: fix an issue in MPI_Gather
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gpu-direct: Fix some compilation warnings with CUDA
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gpu-direct: fix mistake in lazy-init, should be done on all entry points
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gpu-direct: Ooops, no cannot lazy init due to the copy semantic
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gpu-direct: try to avoid the warning in normal way to run, need to find a solution for the NO GPU DIRECT case
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gpu-direct: Cleanup the way to switch the class ON/OFF by using a single #if/else
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gpu-direct: Opps wrong name in option declaration
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gpu-direct: remove a useless scafolding
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gpu-direct: try to implement the copy/move constructor & operator= to solve the Axis issue
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gpu-direct: solve most of the compiler warnings when compiling with CUDA
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