Parallel processing apparatus and method for controlling communication
A packet transmitting unit transmits, to a node via RDMA communication, a packet with a first identifier that represents a predetermined process and a second identifier that represents a destination communication interface and is a logical identifier, as a destination, being added thereto. A plurality of communication interfaces exist. A packet receiving unit receives a packet transmitted from the node via RDMA communication, selects a communication interface that is a destination of a received packet and is used in the predetermined process, based on the first identifier and the second identifier added to the received packet, and transfers the received packet to a selected communication interface.
1. A parallel processing apparatus comprising a plurality of information processing devices including a first information processing device, a second information processing device and a management device, wherein:
the first information processing device includes a transmitting unit that transmits, to the second information processing device via RDMA communication, a packet with a first identifier which represents a predetermined process and a second identifier which represents one of a plurality of communication interfaces included in information processing devices other than the first information processing device and is a logical identifier, as destinations, being added thereto;
the second information processing device includes a plurality of communication interfaces and a receiving unit that receives a packet transmitted from the first information processing device via RDMA communication, selects a communication interface which is a destination of a received packet and is used in the predetermined process, based on the first identifier and the second identifier added to the received packet, and transfers the received packet to the selected communication interface; and
the management device includes a first allocation unit that allocates a unique global identifier which includes the first identifier to each of a plurality of processes which are executed by the second information processing device, and include, respectively, the predetermined processes which execute communication for different purpose.
2. The parallel processing apparatus according to claim 1 , wherein:
the predetermined process is each parallel computation task that includes one or more processes, and
the second information processing device further includes a second allocation unit that allocates respectively different second identifiers to communication interfaces which are used in each of the processes among a plurality of the communication interfaces.
3. The parallel processing apparatus according to claim 1 , wherein:
the first information processing device further includes a first execution unit that executes the predetermined process;
the second information processing device further includes a second execution unit that executes the predetermined process associatively with the first execution unit;
the transmitting unit transmits a packet with the first identifier and the second identifier, as destinations, being added thereto, to the second information processing device via RDMA communication, in a case of packet transmission according to a predetermined process that is executed by the first execution unit; and
the receiving unit includes a receiving unit that identifies the predetermined process which is executed by the second execution unit based on the first identifier added to a received packet, selects the communication interface which is used in the predetermined process and is a destination of a packet based on the second identifier, and transfers the received packet to a selected communication interface.
4. A method of controlling communication between a plurality of information processing devices including a first information processing device, a second information processing device and a management device, each of the plurality of information processing devices includes a plurality of communication interfaces, wherein:
the first information processing device is caused to transmit, to the second information processing device via RDMA communication, a packet with a first identifier that represents a predetermined process and a second identifier that represents one of a plurality of communication interfaces included in information processing devices other than the first information processing device and is a logical identifier, as destinations, being added thereto;
the second information processing device is caused to receive a packet transmitted from the first information processing device via RDMA communication, select a communication interface that is a destination of a received packet and is used in the predetermined process, based on the first identifier and the second identifier added to the received packet, and transfers the received packet to a selected communication interface; and
the management device includes a first allocation unit that allocates a unique global identifier which includes the first identifier to each of a plurality of processes which are executed by the second information processing device, and include, respectively, the predetermined processes which execute communication for different purpose.