gs_comm Module Reference

Defines a gather-scatter communication method.

Data Types
interface	gs_comm_free
	Abstract interface for deallocating a Gather-scatter communication method. More...
interface	gs_comm_init
	Abstract interface for initializing a Gather-scatter communication method. More...
type	gs_comm_t
	Gather-scatter communication method. More...
interface	gs_nbrecv
	Abstract interface for initiating non-blocking recieve operations Posts non-blocking recieve of values and puts the values into buffers. More...
interface	gs_nbsend
	Abstract interface for initiating non-blocking send operations Sends the values in u(send_dof(send_pe(i))) to each rank send_pe(i) for all ranks in send_pe. More...
interface	gs_nbwait
	Abstract interface for waiting on non-blocking operations Waits and checks that data is in buffers and unpacks buffers into correct location in u u(recv_dof(recv_pe(i))) = gs_op(recieve_buffers(recv_pe) for this dof) More...

Functions/Subroutines
subroutine	init_dofs (this)
subroutine	free_dofs (this)
subroutine	init_order (this, send_pe, recv_pe)
	Obtains which ranks to send and receive data from.
subroutine	free_order (this)
subroutine	gs_nbsend_vec (this, u, n, nc, tag, deps, strm)
	Default fused vector send. Abort unless a backend overrides it.
subroutine	gs_nbrecv_vec (this, tag, nc)
	Default fused vector receive. Abort unless a backend overrides it.
subroutine	gs_nbwait_vec (this, u, n, nc, op, strm)
	Default fused vector wait/reduce. Abort unless a backend overrides it.

Variables
integer, parameter, public	gs_comm_mpi = 1
integer, parameter, public	gs_comm_mpigpu = 2
integer, parameter, public	gs_comm_nccl = 3
integer, parameter, public	gs_comm_nvshmem = 4
integer, parameter, public	gs_comm_openshmem = 5
integer, parameter, public	gs_comm_caf = 6
integer, parameter, public	gs_comm_neighbour = 7
integer, parameter, public	gs_comm_utofu = 8
integer, parameter, public	gs_vec_nc = 3
	Maximum number of components handled by the fused vector (multi-component) halo exchange used by gs_op_r3. Sizes the backend vector buffers.

Function/Subroutine Documentation

free_dofs()

subroutine gs_comm::free_dofs ( class(gs_comm_t), intent(inout)  this )

private

Definition at line 179 of file gs_comm.f90.

free_order()

subroutine gs_comm::free_order ( class(gs_comm_t), intent(inout)  this )

private

Definition at line 225 of file gs_comm.f90.

gs_nbrecv_vec()

subroutine gs_comm::gs_nbrecv_vec ( class(gs_comm_t), intent(inout)  this, integer, intent(in)  tag, integer, intent(in)  nc  )

private

Definition at line 253 of file gs_comm.f90.

gs_nbsend_vec()

subroutine gs_comm::gs_nbsend_vec ( class(gs_comm_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

Parameters

u	compact shared buffer, component-outer: u((c-1)*n + idx)
n	number of shared dofs (per component)
nc	number of components

Definition at line 242 of file gs_comm.f90.

gs_nbwait_vec()

subroutine gs_comm::gs_nbwait_vec ( class(gs_comm_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 260 of file gs_comm.f90.

init_dofs()

subroutine gs_comm::init_dofs ( class(gs_comm_t), intent(inout)  this )

private

Definition at line 163 of file gs_comm.f90.

init_order()

subroutine gs_comm::init_order ( class(gs_comm_t), intent(inout)  this, type(stack_i4_t), intent(inout)  send_pe, type(stack_i4_t), intent(inout)  recv_pe  )

private

Parameters

send_pe,only	contains rank ids this porcesss should send to
recv_pe,only	the ranks this process should receive from

Definition at line 202 of file gs_comm.f90.

Variable Documentation

gs_comm_caf

integer, parameter, public gs_comm::gs_comm_caf = 6

Definition at line 43 of file gs_comm.f90.

gs_comm_mpi

integer, parameter, public gs_comm::gs_comm_mpi = 1

Definition at line 43 of file gs_comm.f90.

gs_comm_mpigpu

integer, parameter, public gs_comm::gs_comm_mpigpu = 2

Definition at line 43 of file gs_comm.f90.

gs_comm_nccl

integer, parameter, public gs_comm::gs_comm_nccl = 3

Definition at line 43 of file gs_comm.f90.

gs_comm_neighbour

integer, parameter, public gs_comm::gs_comm_neighbour = 7

Definition at line 43 of file gs_comm.f90.

gs_comm_nvshmem

integer, parameter, public gs_comm::gs_comm_nvshmem = 4

Definition at line 43 of file gs_comm.f90.

gs_comm_openshmem

integer, parameter, public gs_comm::gs_comm_openshmem = 5

Definition at line 43 of file gs_comm.f90.

gs_comm_utofu

integer, parameter, public gs_comm::gs_comm_utofu = 8

Definition at line 43 of file gs_comm.f90.

gs_vec_nc

integer, parameter, public gs_comm::gs_vec_nc = 3

Definition at line 49 of file gs_comm.f90.