US 2009/0276599 A1Published application

Configurable transactional memory for synchronizing transactions

AssigneeXilinx, Inc.

InventorsChidamber R. Kulkarni, Christoforos Kachris

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Abstract

A configurable transactional memory synchronizes transactions from clients. The configurable transactional memory includes a memory buffer and a transactional buffer. The memory buffer includes allocation control and storage, and the allocation control is configurable to selectively allocate the storage between a transactional buffer and a data buffer for the data words. The transactional buffer stores state indicating each combination of a data word and a client for which the data word is referenced by a write access in the transaction in progress from the client. The transactional arbiter generates the completion status for the transaction in progress from each client. The completion status is either committed for no collision or aborted for a collision. A collision is an access that references a data word of the transaction from the client following a write access that references the data word of another transaction in progress from another client.

Claims20

Dependent claims

A configurable transactional memory for synchronizing a plurality of transactions from a plurality of clients, each client having a respective transaction in progress until a completion status is generated for the respective transaction, the respective transaction in progress from the client including at least one access, each access is one of a read access and a write access referencing one of a plurality of data words in the configurable transactional memory, comprising:

a memory buffer including allocation control and storage, wherein the allocation control is configurable to selectively allocate the storage between a transactional buffer and a data buffer for the data words, the transactional buffer for storing state indicating each combination of a data word and a client for which the data word is referenced by a write access in the respective transaction in progress from the client;
and
a transactional arbiter coupled to the memory buffer for generating, in response to the state, the completion status of the respective transaction in progress from each client, wherein the completion status is one of committed in response to an absence of a collision and aborted in response to a presence of a collision, and the collision is present for an access that references a data word of the respective transaction from the client following a write access that references the data word of another transaction in progress from another client.

A system for configuring a configurable transactional memory for synchronizing a plurality of transactions from a plurality of clients, each client having a respective transaction in progress that includes at least one access, each access is one of a read access and a write access to one of a plurality of data words in the configurable transactional memory, the system comprising:

means for selecting a number of the clients;
means for allocating a first amount of storage for the data words in a data buffer of the configurable transactional memory;
means for allocating a second amount of storage for a transactional buffer of the configurable transactional memory, the transactional buffer for tracking each of the transactions in progress from the clients until the transaction is one of committed in response to absence of a collision and aborted in response to a presence of a collision, wherein the collision is an access of the transaction that references one of the data words following a write access of another of the transactions in progress that references the one of the data words;
means for determining a number of block RAMs for a memory buffer that includes the data and transactional buffers;
means for generating and outputting configuration data for configuring the configurable transactional memory to support the number of clients using the number of block RAMs for the memory buffer;
and
means for configuring the configurable transactional memory with the configuration data.

4 more elements

Dependencies are inferred from the claim text.