One disclosed embodiment is a multi-processor system comprising a
processor having a processor pipeline that executes program instructions
with data from a speculative fill that is provided in response to a
source request. The multi-processor system can further comprise a
non-retired store cache that retains non-retired store data based on
program instructions to store data into a data cache associated with the
processor. The non-retired store data can be written to the data cache if
data of a speculative fill associated with the non-retired store data is
determined to be coherent. Other apparatus and methodologies are
disclosed.