摘要:
A method comprises, while a first device has ownership of a data unit, a second device issuing a request to perform a memory write of said data unit. The method further comprises a memory controller performing the memory write without changing ownership to the second device.
摘要:
A method comprises, while a first device has ownership of a data unit, a second device issuing a request to perform a memory write of said data unit. The method further comprises a memory controller performing the memory write without changing ownership to the second device.
摘要:
A method is provided for pre-fetching data into a cache memory. A first cache-line address of each of a number of data requests from at least one processor is stored. A second cache-line address of a next data request from the processor is compared to the first cache-line addresses. If the second cache-line address is adjacent to one of the first cache-line addresses, data associated with a third cache-line address adjacent to the second cache-line address is pre-fetched into the cache memory, if not already present in the cache memory.
摘要:
A system for pushing data, the system includes a source node that stores a coherent copy of a block of data. The system also includes a push engine configured to determine a next consumer of the block of data. The determination being made in the absence oft he push engine detecting a request for the block of data from the next consumer. The push engine causes the source node to push the block of data to a memory associated with the next consumer to reduce latency of the next consumer accessing the block of data.
摘要:
A method for providing a transactional memory is described. A cache coherency protocol is enforced upon a cache memory including cache lines, wherein each line is in one of a modified state, an owned state, an exclusive state, a shared state, and an invalid state. Upon initiation of a transaction accessing at least one of the cache lines, each of the lines is ensured to be either shared or invalid. During the transaction, in response to an external request for any cache line in the modified, owned, or exclusive state, each line in the modified or owned state is invalidated without writing the line to a main memory. Also, each exclusive line is demoted to either the shared or invalid state, and the transaction is aborted.
摘要:
A method for providing a transactional memory is described. A cache coherency protocol is enforced upon a cache memory including cache lines, wherein each line is in one of a modified state, an owned state, an exclusive state, a shared state, and an invalid state. Upon initiation of a transaction accessing at least one of the cache lines, each of the lines is ensured to be either shared or invalid. During the transaction, in response to an external request for any cache line in the modified, owned, or exclusive state, each line in the modified or owned state is invalidated without writing the line to a main memory. Also, each exclusive line is demoted to either the shared or invalid state, and the transaction is aborted.
摘要:
A method is provided for pre-fetching data into a cache memory. A first cache-line address of each of a number of data requests from at least one processor is stored. A second cache-line address of a next data request from the processor is compared to the first cache-line addresses. If the second cache-line address is adjacent to one of the first cache-line addresses, data associated with a third cache-line address adjacent to the second cache-line address is pre-fetched into the cache memory, if not already present in the cache memory.
摘要:
A cache is provided for operatively coupling a processor with a main memory. The cache includes a cache memory and a cache controller operatively coupled with the cache memory. The cache controller is configured to receive memory requests to be satisfied by the cache memory or the main memory. In addition, the cache controller is configured to process cache activity information to cause at least one of the memory requests to bypass the cache memory.
摘要:
A cache is provided for operatively coupling a processor with a main memory. The cache includes a cache memory and a cache controller operatively coupled with the cache memory. The cache controller is configured to receive memory requests to be satisfied by the cache memory or the main memory. In addition, the cache controller is configured to process cache activity information to cause at least one of the memory requests to bypass the cache memory.
摘要:
A processor transmits clean castout messages indicating that a cache line is not dirty and is no longer being stored by a lowest level cache of the processor. An external cache receives the clean castout messages and manages cache lines based in part on the clean castout messages.