In one embodiment, a fabric of a processor such as a system on a chip includes at least one data buffer including a plurality of entries each to store data to be transferred to and from a plurality of agents and to and from a memory, a request tracker to maintain track of pending requests to be output to an ordered domain of the fabric, and an output throttle logic to control allocation into the ordered domain between write transactions from a core agent and read completion transactions from the memory. Other embodiments are described and claimed.