A flow control method and device based on source chip id in cross-chip forwarding

Abstract

The invention discloses a source chip ID-based flow control method and device applied in cross-chip forwarding. The method comprises the steps that a receiver chip counts the message number of each source chip in real time, compares the message number with a preset blocking threshold value in the receiver chip and sends a corresponding control frame to a sender chip according to a comparing result; and the sender chip receives the control frame, takes out source chip IDs in the control frame and controls the state of messages corresponding to the source chip IDs according to the control frame.According to the method and device, the source chip IDs are taken as basic units of flow control, mass flow of chip data is limited in a targeted mode, congestion of a network is quickly responded, network influences brought by congestion are reduced, and the data transmission performance of the network is improved.

Description

technical field [0001] The invention relates to a flow control mechanism for cross-chip forwarding, in particular to a flow control method and device based on source chip IDs in cross-chip forwarding. Background technique [0002] The traffic forwarded across chips needs to pass through the interconnection port between chips. When the interconnection port is congested, the receiving end must use the flow control mechanism to notify the sending end to suspend sending. The prior art solution is to perform cache resource management on the entry level or cache resource management on the exit level respectively. That is to say, the existing flow control mechanism is port-based. When the interconnection port is congested, the chip that transmits small traffic and the chip that transmits large traffic are suspended from transmitting data at the same time, so that the congestion of the interconnection port is controlled. [0003] However, in a multi-chip system, if one chip transmi...

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Problems solved by technology

[0003] However, in a multi-chip system, if one chip transmits large data, using the above scheme will cause other chips with only small traffic to be unable to transmit data

That is to say, in the existing technology, it is impossible to fairly allocate cache resources for paths, and it is impossible to achieve targeted cache management for some special forwarding traffic, which affects the ports of all chips in the entire network device and has a great impact on the entire network. Big

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