Routine issnddnd

Description

This is one of the four multi-block routines that provide the connection between domain decomposition at the host and at the nodes, see Fig. 1.

This routine copies unknowns near or on the boundary of the subdomain solut arrays to the virt arrays of the neighbouring blocks on the host. If the host is the same program as the node, a plain copying of data occurs. Otherwise, the issend routine is used to send the information using PVM. See messages needed for the transport of domain decomposition information. Figure 4 presents a schematical overview of the communication from node to host.

  
Figure 4: Communication from node to host

Heading

subroutine issnddnd(itrans, ilev, 
                    isiinput, issolut, 
                    iadmin, isitopol)

Parameters

integer

itrans, ilev, isiinput(*), issolut(*), iadmin(*), isitopol

-

itrans

indicates the quantities to be transported

ilev

the time level at which multi-block transport occurs

isiinput

array of pointers to the subdomain iinput arrays

issolut

array of pointers to the subdomain solut arrays

iadmin

reserved

isitopol

pointer to the itopol array

Input

The subdomain solut arrays are initialized. On entry, the message to the host has already been opened.

Output

The virt arrays of all neighbouring blocks of the local blocks are updated with values from the inner regions of the local blocks. At return, the message to the host is not terminated and can still be appended to.

See also

issnddhs, isrcddhs, isrcddnd, isddget, isddvput, issend