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ch4/am: Caching buffer attribute in request and use typerep fast path for H2H #7082

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ch4/am: Caching buffer attribute in request and use typerep fast path for H2H #7082

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Commits on Aug 1, 2024

  1. typerep: add fastpath for H2H typerep copy/pack/unpack 

    Add new flag MPIR_TYPEREP_FLAG_H2H can be passed to choose this path.
If typerep user knows the buffers are all host, they can using this
to bypass buffer attribute checking and related branches.

This can be useful for SHM pipelined transfer where send/recv buffer
attribute can be cached in request.
    @yfguo
    yfguo committed Aug 1, 2024
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  2. mpl/gpu: make pointer attribute type flag like 

    The checking on whether a buffer is on host can be simplified to one
check because the enum of unregistered host and registered host can
be combined.
    @yfguo
    yfguo committed Aug 1, 2024
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  3. mpl/gpu: code format cleanup

    @yfguo
    yfguo committed Aug 1, 2024
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  4. ch4/mpidig: cache destination buffer attribute in request 

    We check and cache the recv buffer attribute when posting recv request.
This info is used to use the H2H fast path in typerep.
    @yfguo
    yfguo committed Aug 1, 2024
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  5. ch4/shm: add fast path for host buffer 

    Check if source buffer is on host and choose typerep fast path for H2H.
    @yfguo
    yfguo committed Aug 1, 2024
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