Patent ID: 8214424
Filing Date: 2012-07-03
Classification: G06F

Abstract:
1. In a first processing node of a distributed data processing system having multiple processing nodes executing threads of a parallel job, a method for efficient inter-node communication among threads of the parallel job, the method comprising: generating, at the first processing node, one or more messages for transmission to at least one other processing node accessible via a network, wherein the one or more messages are generated by/for a first thread executing at the first processing node and the at least one other processing node executes one or more second threads of a same parallel job as the first thread; placing the one or more messages within a particular location in memory of the first processing node, wherein the placing of the one or more messages within the particular location triggers a transmission of the one or more messages; and in response to placing the one or more messages within the particular location in memory of the first processing node, transmitting, via a host fabric interface (HFI) of the first processing node, the one or more messages within a one-to-all messaging (OTAM) instruction broadcast on the network, wherein the one or more messages are transmitted to an HFI of one or more processing nodes in a cluster of processing nodes across the network that execute threads of the same parallel job as the first thread, wherein each of the cluster of processing nodes has allocated therein a plurality of receiving blocks to accept OTAM instruction broadcasts from other processing nodes in the cluster; wherein an OTAM instruction includes at least: