Data transfer control apparatus and parallel computing system

A non-transitory computer readable recording medium storing a computer program that causes a computer to perform a procedure for controlling transfer of data from a plurality of first nodes, which are included in a first region in a network in which a plurality of nodes are connected in n dimensions (where n is an integer of 2 or higher) by a torus or mesh interconnect, to a plurality of second nodes included in a second region in the network, the procedure comprising;

• generating an n-dimensional Latin hypercube in which a number of symbols in each dimension is equal to a value in keeping with a size of the first region;
• associating, in accordance with respective positions of the plurality of first nodes in the first region, a symbol at a corresponding position in the Latin hypercube with each of the plurality of first nodes;
• and
• instructing each of the plurality of first nodes so that parallel data transfers by a plurality of first node sets, in which first nodes associated with a same symbol in the Latin hypercube are grouped, are executed in order in units of a first node set.

A parallel computing system comprising:

• a plurality of nodes included in a network with an n-dimensional (where n is an integer of 2 or higher) torus or mesh interconnect;
• and
• a control node that controls data transfers from a plurality of first nodes included in a first region in the network to a plurality of second nodes included in a second region in the network,
• wherein the control node:
• generates an n-dimensional Latin hypercube in which a number of symbols in each dimension is equal to a value in keeping with a size of the first region;
• associates, in accordance with respective positions of the plurality of first nodes in the first region, a symbol at a corresponding position in the Latin hypercube with each of the plurality of first nodes;
• and
• instructs each of the plurality of first nodes so that parallel data transfers by a plurality of first node sets, in which first nodes associated with a same symbol in the Latin hypercube are grouped, are executed in order in units of a first node set, and
• each first node transmits data to a predetermined second node out of the plurality of second nodes in accordance with the instructing by the control node.