Parallel processing apparatus and method for controlling communication

• US 10,353,857 B2
• Filed: 03/27/2017
• Issued: 07/16/2019
• Est. Priority Date: 04/12/2016
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ajima, Yuichiro
• Primary Examiner(s): Thieu, Benjamin M
• Application Number:
  US15/469,627
• Publication Number:
  US 20170293589A1
• Time in Patent Office: 841 Days
• CPC Class Codes: G06F 12/1081 for peripheral access to main memory, e.g. direct memory access [DMA]
• CPC Class Codes: G06F 15/167 using a common memory, e.g. mailbox
• CPC Class Codes: G06F 15/17331 Distributed shared memory [DSM], e.g. remote direct memory access [RDMA]
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/32 by discarding or delaying data units, e.g. packets or frames
• CPC Class Codes: H04L 49/9063 Intermediate storage in different physical parts of a node or terminal
• CPC Class Codes: H04L 65/40 Support for services or applications
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

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.

Claims

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.