gs_shmem.F90 File Reference

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Data Types
type	gs_shmem::gs_shmem_buf_t
	Symmetric buffer for one direction of OpenSHMEM communication. More...
type	gs_shmem::gs_shmem_t
	Gather-scatter communication using OpenSHMEM one-sided puts with per-rank signaling for completion (OpenSHMEM 1.5). More...

Modules
module	gs_shmem
	Defines OpenSHMEM gather-scatter communication.

Functions/Subroutines
subroutine	gs_shmem::gs_shmem_buf_init (this, pe_order, dof_stack)
	Allocate symmetric memory and per-neighbor bookkeeping for one direction of communication.
subroutine	gs_shmem::gs_shmem_buf_free (this)
	Release symmetric memory and bookkeeping.
subroutine	gs_shmem::gs_shmem_init (this, send_pe, recv_pe)
	Initialise OpenSHMEM based communication method.
subroutine	gs_shmem::gs_shmem_free (this)
	Deallocate OpenSHMEM based communication method.
subroutine	gs_shmem::gs_shmem_nbsend (this, u, n, 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.
subroutine	gs_shmem::gs_shmem_nbrecv (this)
	No-op: receives are completed via remote put-with-signal.
subroutine	gs_shmem::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.