gs_crystal_plan.f90 File Reference

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Data Types
type	gs_crystal_plan::gs_crystal_stage_t
	One active communication stage of the routing plan. More...
type	gs_crystal_plan::gs_crystal_plan_t
	The full routing plan for one gather-scatter schedule. More...

Modules
module	gs_crystal_plan
	Routing plan for the crystal router gather-scatter comm. backends.

Functions/Subroutines
subroutine	gs_crystal_plan::gs_crystal_plan_init (this, send_pe, recv_pe, send_dof, recv_dof)
	Work out the routing plan for a gather-scatter schedule.
subroutine	gs_crystal_plan::cr_final_dofs (this, rdest, rorig, rlen, nrec, recv_pe, recv_dof)
	Turn the records left at the end of the routing into the reduction order of the delivered words.
subroutine	gs_crystal_plan::cr_meta_exchange (sbuf, nsrec, dst, rbuf, nrrec, src)
	Size-negotiated bidirectional exchange of record metadata with a partner. Either dst or src may be -1 to make that direction a no-op, which is how the unpaired ranks of an odd sized range are kept matched and deadlock free.
subroutine	gs_crystal_plan::gs_crystal_plan_free (this)
	Release the routing plan.

Variables
integer, parameter	gs_crystal_plan::cr_rec = 3
	Metadata words per in-flight record in the symbolic pass: destination rank, originating rank, payload length.
integer, parameter	gs_crystal_plan::cr_plan_tag = 0
	Message tag for the symbolic pass. Setup only, and every exchange in it is a fully synchronised MPI_Sendrecv, so one tag suffices.