US 2011/0216860 A1 · COMMUNICATION METHOD

Abstract

A communication method is provided to reduce an overhead of inter-processor synchronization for a communication phase in collective communication and to speed up the collective communication. Each of processors in a parallel computer start a previous process before a collective communication phase in which communications are performed at a same time among the processors through a inter-processor network. Each processor executes a synchronization command in advance at a time when a portion of the previous process for a predetermined time t is left. The inter-processor synchronization control section transmits a synchronization completion notice to each processor, if a synchronization condition is met. For the period, each processor executes the previous process in parallel. Then, the plurality of processors enter the collective communication phase.

Claims21

Dependent claims

1-12. (canceled)

A communication method in a parallel computer comprising:

a plurality of processors;
an inter-processor network connected to said plurality of processors;
and
an inter-processor synchronization control section configured to establish inter-processor synchronization among said plurality of processors,
said communication method comprising:
said inter-processor synchronization control section executing the inter-processor synchronization to overlap with a previous process before a collective communication phase, in which communications are performed at a same time among said plurality of processors through said inter-processor network, or a communication of a partial communication phase during a time period required for the inter-processor synchronization.

3 more elements

A parallel computer comprising:

a plurality of processors;
a inter-processor network configured to connect said plurality of processors;
and
an inter-processor synchronization control sections configured to establish inter-processor synchronization among said plurality of processors,
wherein said inter-processor synchronization control section executes the inter-processor synchronization to overlap with a previous process before a collective communication phase, in which communications are performed at a same time among said plurality of processors through said inter-processor network, or a communication of a partial communication phase during a time period required for the inter-processor synchronization.

2 more elements

Dependencies are inferred from the claim text.

Communication method

Life of this patent

Communication method

Life of this patent

Abstract

Claims21