Write traffic shaper circuits

摘要

In an embodiment, one or more fabric control circuits may be inserted in a communication fabric to control various aspects of the communications by components in the system. The fabric control circuits may be included on the interface of the components to the communication fabric, in some embodiments. In other embodiments that include a hierarchical communication fabric, fabric control circuits may alternatively or additionally be included. The fabric control circuits may be programmable, and thus may provide the ability to tune the communication fabric to meet performance and/or functionality goals.

主权项

1. A fabric control circuit comprising:
at least one register configured to store a value corresponding to a number of remaining data beats to be transmitted for one or more write transactions on a first interface; and a control unit coupled to the register and further coupled to at least a portion of the first interface, wherein the control unit is configured to: permit one or more write transactions to issue on the first interface up to a predefined threshold according to the value stored in the register; and prevent a specific write transaction from issuing on the first interface responsive to the value stored in the register being greater than zero, wherein issuing the specific write transaction includes transmitting an address and transaction attributes for the specific write transaction on the first interface, wherein the transaction attributes include at least one of a cacheability and a coherence of the transaction.