Re-ordering requests for shared resources

A system for re-ordering requests for shared resources, the system comprising:

• one or more requestors for sending requests for accessing the shared resources, wherein a plurality of requests may be received from each requestor;
• a buffer manager for associating a unique identifier tag with each request from the one or more requestors;
• an arbiter for receiving the plurality of request and for arbitrating between the plurality of requests in such a way so that the plurality of requests from each requestor may be re-ordered in non-FIFO order, and for selecting a next request to access the shared resources based on the re-ordering of requests;
• the arbiter also configured to send to the requestor a unique identifier tag associated with the selected request and a strobe signal indicating that the selected request is being serviced by a memory controller, so that the requestor is informed as to the order in which the request from the requestor is being serviced;
• and
• a memory controller configured to access the shared resources, wherein the arbiter communicates an information to the memory controller and wherein the information permits the memory controller to service the request selected by the arbiter based on a re-ordering of the requests.

An apparatus for re-ordering requests for shared resources, the apparatus comprising:

• means for receiving, by an arbiter, requests for accessing the shared resources from one or more requestors, wherein a plurality of requests may be received from each requestor;
• means for associating, by a buffer manager, a unique identifier tag with each request from the one or more requestors;
• means for arbitrating, by the arbiter, between the plurality of requests in such a way so that the plurality of requests from each requestor may be re-ordered in non-FIFO order;
• means for selecting, by the arbiter, a next request to access the shared resources based on the re-ordering of requests;
• means for sending, by the arbiter to the requestor, a unique identifier tag associated with the selected request and a strobe signal indicating that the selected request is being serviced by a memory controller, so that the requestor is informed as to the order in which the request from the requestor is being serviced;
• and
• means for communicating an information from the arbiter to the memory controller, where the memory controller accesses the shared resources and the information permits the memory controller to service the next request selected by the arbiter.