Defines OpenSHMEM gather-scatter communication.
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| subroutine | gs_shmem_buf_init (this, pe_order, dof_stack) |
| | Allocate symmetric memory and per-neighbor bookkeeping for one direction of communication.
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| subroutine | gs_shmem_buf_free (this) |
| | Release symmetric memory and bookkeeping.
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| subroutine | gs_shmem_init (this, send_pe, recv_pe) |
| | Initialise OpenSHMEM based communication method.
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| subroutine | gs_shmem_free (this) |
| | Deallocate OpenSHMEM based communication method.
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| subroutine | gs_shmem_nbsend (this, u, n, tag, deps, strm) |
| | Pack the gathered shared dofs into the symmetric send buffer and issue non-blocking puts with signaling to each neighbor's recv buffer. Before each put, wait for the receiver's ack of our previous round so we never overwrite a buffer the receiver hasn't consumed yet.
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| subroutine | gs_shmem_nbrecv (this, tag) |
| | No-op: receives are completed via remote put-with-signal.
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| subroutine | gs_shmem_nbwait (this, u, n, op, strm) |
| | Wait per-neighbor for the signal indicating that data has landed, apply the gather-scatter operation from the recv buffer into u, and ack the sender so they may overwrite the buffer in the next round.
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| subroutine | gs_shmem_nbsend_vec (this, u, n, nc, tag, deps, strm) |
| | Fused nc-component send: pack nc contiguous component blocks per peer slab and put nc*ndofs reals with a single signal. Buffer indexing and put size scale by nc; the per-rank signalling is unchanged.
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| subroutine | gs_shmem_nbrecv_vec (this, tag, nc) |
| | No-op: receives are completed via remote put-with-signal.
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| subroutine | gs_shmem_nbwait_vec (this, u, n, nc, op, strm) |
| | Fused nc-component wait/reduce: per peer, wait on the data signal and reduce nc component blocks into u, then ack the sender.
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1.9.8