Dynamically updating hardware prefetch trait to exclusive or shared in multi-memory access agent system
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United States of America Patent
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Feb 13, 2018
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N/A
app pub date -
Feb 18, 2015
filing date -
Oct 20, 2014
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Abstract
A hardware data prefetcher is comprised in a memory access agent, wherein the memory access agent is one of a plurality of memory access agents that share a memory. The hardware data prefetcher includes a prefetch trait that is initially either exclusive or shared. The hardware data prefetcher also includes a prefetch module that performs hardware prefetches from a memory block of the shared memory using the prefetch trait. The hardware data prefetcher also includes an update module that performs analysis of accesses to the memory block by the plurality of memory access agents and, based on the analysis, dynamically updates the prefetch trait to either exclusive or shared while the prefetch module performs hardware prefetches from the memory block using the prefetch trait.
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