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WIP: Only transpose real-valued data where possible #123

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WIP: Only transpose real-valued data where possible #123

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This PR addresses issue #110 "Lower all-to-all communication volume in fft transposes".

The first and last data transposes in the preconditioner need only be on real-valued data: the vector acted on is real, and the return vector is real. This halves the communication volume of 2/4 transpose operations.

@JHopeCollins JHopeCollins added Core functionality Adding to the main paradiag functionality performance Improving or fixing the computational performance labels Jun 27, 2023
@JHopeCollins JHopeCollins self-assigned this Jun 27, 2023
@JHopeCollins JHopeCollins linked an issue Jun 27, 2023 that may be closed by this pull request
Lower all-to-all communication volume in fft transposes #110
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@JHopeCollins JHopeCollins changed the title Only transpose real-valued data where possible WIP (to be merged after #121) Only transpose real-valued data where possible Jun 27, 2023
@JHopeCollins JHopeCollins changed the base branch from master to flamegraph June 27, 2023 08:57
Base automatically changed from flamegraph to master June 27, 2023 13:30
@JHopeCollins JHopeCollins changed the title WIP (to be merged after #121) Only transpose real-valued data where possible WIP: Only transpose real-valued data where possible Jun 27, 2023
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Core functionality Adding to the main paradiag functionality performance Improving or fixing the computational performance
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Lower all-to-all communication volume in fft transposes
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