Abstract: An apparatus and method are described for efficiently transferring data from a producer core to a consumer core within a central processing unit (CPU). For example, one embodiment of a method comprises: A method for transferring a chunk of data from a producer core of a central processing unit (CPU) to consumer core of the CPU, comprising: writing data to a buffer within the producer core of the CPU until a designated amount of data has been written; upon detecting that the designated amount of data has been written, responsively generating an eviction cycle, the eviction cycle causing the data to be transferred from the fill buffer to a cache accessible by both the producer core and the consumer core; and upon the consumer core detecting that data is available in the cache, providing the data to the consumer core from the cache upon receipt of a read signal from the consumer core.