Transfer apparatus, transfer system, and non-transitory computer readable medium

A transfer apparatus comprising:

• a first communication path that communicates with a memory controller that performs reading from and writing to ranges specified in a shared memory;
• a second communication path that communicates with an arbitration device that arbitrates requests between devices, the arbitration device specifying ranges in the shared memory and requesting the memory controller to perform reading from and writing to the ranges in accordance with requests from one or more arithmetic devices;
• an accepting unit that accepts a request for data stored in the shared memory from a request apparatus;
• a registration unit that detects a range from the arbitration device and registers the range, the range having been specified for reading by an arithmetic device among the one or more arithmetic devices;
• an acquisition unit that acquires the data from the memory controller via the first communication path in a case where the request issued from the request apparatus is issued for an unregistered range, and acquires the data from the arbitration device via the second communication path in a case where the request is issued for a registered range;
• and
• a transfer unit that transfers the acquired data to the request apparatus,
• wherein in a case where a first range detected from the arbitration device overlaps at least a portion of a second range, which has been registered, or is adjacent to the second range, the registration unit combines the first range and the second range into a single continuous range and registers the first range and the second range as the single continuous range.

A non-transitory computer readable medium storing a program causing a computer to execute a process, the computer including a first communication path that communicates with a memory controller that performs reading from and writing to ranges specified in a shared memory, and a second communication path that communicates with an arbitration device that arbitrates requests between devices, the arbitration device specifying ranges in the shared memory and requesting the memory controller to perform reading from and writing to the ranges in accordance with requests from one or more arithmetic devices, the process comprising:

• accepting a request for data stored in the shared memory from a request apparatus;
• detecting a range from the arbitration device and registering the range, the range having been specified for writing by an arithmetic device among the one or more arithmetic devices;
• acquiring the data from the memory controller via the first communication path in a case where the request issued from the request apparatus is issued for a registered range, and acquires the data from the arbitration device via the second communication path in a case where the request is issued for an unregistered range;
• and
• transferring the acquired data to the request apparatus,
• wherein, in the registering, in a case where a first range detected from the arbitration device overlaps at least a portion of a second range, which has been registered, or is adjacent to the second range, the first range and the second range are combined into a single continuous range and the first range and the second range are registered as the single continuous range.