Apparatus for vetoing reallocation requests during a data transfer based on data bus latency and the number of received reallocation requests below a threshold

摘要

A method for managing a data transfer between a first device and an allocated portion of common memory including the steps of receiving a reallocation request of the allocated portion of common memory from a second device, receiving a veto of the requested reallocation from the first device, and delaying the reallocation request. In addition, a method for transferring data between a peripheral device and a common memory in a virtual memory system including the steps of instructing the peripheral device to transfer data with an allocated portion of the common memory, requesting a reallocation of the allocated portion of the common memory, and receiving a veto of the requested reallocation from the peripheral device in response to the instructed data transfer. Furthermore, an apparatus for transferring data between a peripheral device and a common memory in a virtual memory system including an apparatus for instructing the peripheral device to transfer data with an allocated portion of the common memory, an apparatus for requesting a reallocation of the allocated portion of the common memory, and an apparatus for receiving a veto of the requested reallocation from the peripheral device in response to the instructed data transfer.