Abstract: One embodiment of the invention sets forth a control crossbar unit that is designed to transmit control information from control information generators to destination components within the computer system. The control information may belong to various traffic paradigms, such as short-latency data traffic, narrow-width data traffic or broadcast data traffic. The physical connections within the control crossbar unit are categorized based on the different types of control information being transmitted through the control crossbar unit. The physical connections belong to the following categories: one-to-one (OTO) connections, one-to-many (OTM) connections, valid-to-one (VTO) connections, valid-to-many (VTM) connections wire-to-one (WTO) connections and wire-to-many (WTM) connections.

Abstract: One embodiment of the present invention sets forth a destination credit management unit (CMU) that is coupled to source clients and a destination client and manages the transmission of credits associated with the destination client to the source clients. The destination CMU receives credits from the destination client as memory spaces within the destination client free up and transmits the credits to source clients as credits are consumed by the source clients. When a data packet is received from a source client, the destination CMU returns a credit to the source client if a credit is available. If a credit is not available, then the destination CMU stalls the source client until a credit becomes available. Credits are transmitted to stalled source clients in the order in which the source clients were stalled.

Abstract: One embodiment of the invention sets forth a control crossbar unit that is designed to transmit control information from control information generators to destination components within the computer system. The control information may belong to various traffic paradigms, such as short-latency data traffic, narrow-width data traffic or broadcast data traffic. The physical connections within the control crossbar unit are categorized based on the different types of control information being transmitted through the control crossbar unit. The physical connections belong to the following categories: one-to-one (OTO) connections, one-to-many (OTM) connections, valid-to-one (VTO) connections, valid-to-many (VTM) connections wire-to-one (WTO) connections and wire-to-many (WTM) connections.

Abstract: One embodiment of the invention sets forth a control crossbar unit that is designed to transmit control information from control information generators to destination components within the computer system. The control information may belong to various traffic paradigms, such as short-latency data traffic, narrow-width data traffic or broadcast data traffic. The physical connections within the control crossbar unit are categorized based on the different types of control information being transmitted through the control crossbar unit. The physical connections belong to the following categories: one-to-one (OTO) connections, one-to-many (OTM) connections, valid-to-one (VTO) connections, valid-to-many (VTM) connections wire-to-one (WTO) connections and wire-to-many (WTM) connections.