gs_device_shmem Module Reference

Defines GPU aware MPI gather-scatter communication.

Data Types
interface	cuda_gs_pack_and_push
interface	cuda_gs_pack_and_push_vec
interface	cuda_gs_pack_and_push_wait
interface	cuda_gs_post_ready
interface	cuda_gs_unpack
interface	cuda_gs_unpack_vec
interface	cudafree_nvshmem
interface	cudamalloc_nvshmem
type	gs_device_shmem_buf_t
	Buffers for non-blocking communication and packing/unpacking. More...
type	gs_device_shmem_t
	Gather-scatter communication using device SHMEM. The arrays are indexed per PE like send_pe and @ recv_pe. More...

Functions/Subroutines
subroutine	gs_device_shmem_buf_init (this, pe_order, dof_stack, mark_dupes)
subroutine	gs_device_shmem_buf_free (this)
subroutine	gs_device_shmem_init (this, send_pe, recv_pe)
	Initialise MPI based communication method.
subroutine	gs_device_shmem_free (this)
	Deallocate MPI based communication method.
subroutine	gs_device_shmem_nbsend (this, u, n, tag, deps, strm)
	Post non-blocking send operations.
subroutine	gs_device_shmem_nbrecv (this, tag)
	Post non-blocking receive operations.
subroutine	gs_device_shmem_nbwait (this, u, n, op, strm)
	Wait for non-blocking operations.
subroutine	gs_device_shmem_nbsend_vec (this, u, n, nc, tag, deps, strm)
	Fused nc-component send. u is the compact shared device buffer (component-outer, per-component stride n = nshared). All the work is done in nbwait_vec; this only orders against the packing dependencies.
subroutine	gs_device_shmem_nbrecv_vec (this, tag, nc)
	No-op: everything happens in nbwait_vec.
subroutine	gs_device_shmem_nbwait_vec (this, u, n, nc, op, strm)
	Fused nc-component pack-and-push + unpack.

Function/Subroutine Documentation

gs_device_shmem_buf_free()

subroutine gs_device_shmem::gs_device_shmem_buf_free ( class(gs_device_shmem_buf_t), intent(inout)  this )

private

Definition at line 263 of file gs_device_shmem.F90.

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gs_device_shmem_buf_init()

subroutine gs_device_shmem::gs_device_shmem_buf_init ( class(gs_device_shmem_buf_t), intent(inout)  this, integer, dimension(:), intent(inout), allocatable  pe_order, type(stack_i4_t), dimension(:), intent(inout), allocatable  dof_stack, logical, intent(in)  mark_dupes  )

private

Definition at line 183 of file gs_device_shmem.F90.

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gs_device_shmem_free()

subroutine gs_device_shmem::gs_device_shmem_free ( class(gs_device_shmem_t), intent(inout)  this )

private

Definition at line 346 of file gs_device_shmem.F90.

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gs_device_shmem_init()

subroutine gs_device_shmem::gs_device_shmem_init ( class(gs_device_shmem_t), intent(inout)  this, type(stack_i4_t), intent(inout)  send_pe, type(stack_i4_t), intent(inout)  recv_pe  )

private

Definition at line 279 of file gs_device_shmem.F90.

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gs_device_shmem_nbrecv()

subroutine gs_device_shmem::gs_device_shmem_nbrecv ( class(gs_device_shmem_t), intent(inout)  this, integer, intent(in)  tag  )

private

Definition at line 409 of file gs_device_shmem.F90.

gs_device_shmem_nbrecv_vec()

subroutine gs_device_shmem::gs_device_shmem_nbrecv_vec ( class(gs_device_shmem_t), intent(inout)  this, integer, intent(in)  tag, integer, intent(in)  nc  )

private

Definition at line 494 of file gs_device_shmem.F90.

gs_device_shmem_nbsend()

subroutine gs_device_shmem::gs_device_shmem_nbsend ( class(gs_device_shmem_t), intent(inout)  this, real(kind=rp), dimension(n), intent(inout)  u, integer, intent(in)  n, integer, intent(in)  tag, type(c_ptr), intent(inout)  deps, type(c_ptr), intent(inout)  strm  )

private

Definition at line 380 of file gs_device_shmem.F90.

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gs_device_shmem_nbsend_vec()

subroutine gs_device_shmem::gs_device_shmem_nbsend_vec ( class(gs_device_shmem_t), intent(inout)  this, real(kind=rp), dimension(nc*n), intent(inout)  u, integer, intent(in)  n, integer, intent(in)  nc, integer, intent(in)  tag, type(c_ptr), intent(inout)  deps, type(c_ptr), intent(inout)  strm  )

private

Definition at line 476 of file gs_device_shmem.F90.

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gs_device_shmem_nbwait()

subroutine gs_device_shmem::gs_device_shmem_nbwait ( class(gs_device_shmem_t), intent(inout)  this, real(kind=rp), dimension(n), intent(inout)  u, integer, intent(in)  n, integer  op, type(c_ptr), intent(inout)  strm  )

private

Definition at line 419 of file gs_device_shmem.F90.

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gs_device_shmem_nbwait_vec()

subroutine gs_device_shmem::gs_device_shmem_nbwait_vec ( class(gs_device_shmem_t), intent(inout)  this, real(kind=rp), dimension(nc*n), intent(inout)  u, integer, intent(in)  n, integer, intent(in)  nc, integer  op, type(c_ptr), intent(inout)  strm  )

private

Definition at line 500 of file gs_device_shmem.F90.

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