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common/ompio: implement pipelined read and write operation #11185

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implement pipelined file_write and file_read operations. This code is being used if a bounce buffer is required,e.g. when using device memory or a non-native data representation. The new code shows significant performance improvements for reading/writing device buffers compared to the previous code version, and reduces the memory footprint of the library by allocating smaller temporary buffers.

The current code is only dealing with blocking file_read/write operations, non-blocking operations will follow in a second step.

Signed-off-by: Edgar Gabriel [email protected]
(cherry picked from commit c50ffa7)

implement pipelined file_write and file_read operations.
This code is being used if a bounce buffer is required,e.g. when using
device memory or a non-native data representation. The new code
shows significant performance improvements for reading/writing device
buffers compared to the previous code version, and reduces the memory footprint
of the library by allocating smaller temporary buffers.

The current code is only dealing with blocking file_read/write operations,
non-blocking operations will follow in a second step.

Signed-off-by: Edgar Gabriel <[email protected]>
(cherry picked from commit c50ffa7)
@gpaulsen gpaulsen merged commit 9522acd into open-mpi:v5.0.x Jan 6, 2023
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3 participants