Packet processing method and apparatus, communications device, and switching circuit

A communications device, comprising:

• an interface;
• a processor;
• and
• a non-transitory memory storing a program executable by the processor;
• wherein the interface is configured to receive a packet from another communications device;
• wherein the program includes instructions for:
• determining a first queue buffer usable to store the packet;
• and
• determining a first upper limit value of the first queue buffer based on a port sharing upper limit value of a first port buffer and a global sharing upper limit value of a global buffer, wherein the port sharing upper limit value is equal to a product of an available value of the first port buffer and a first coefficient, and the global sharing upper limit value is equal to a product of an available value of the global buffer and a second coefficient, and wherein the non-transitory memory comprises the global buffer, wherein the global buffer comprises at least one port buffer, the first port buffer is comprised in the at least one port buffer, the first port buffer comprises at least one queue buffer, and the first queue buffer is comprised in the at least one queue buffer;
• and
• wherein the program further includes instructions for processing the packet based on the first upper limit value of the first queue buffer, an occupation value of the first queue buffer, and a size of the packet.

A non-transitory readable storage medium, wherein the non-transitory readable storage medium stores a computer program, and when the computer program is executed by a computer, the execution of the computer program causes the computer to:

• receive a packet from a second device;
• determine a first queue buffer used to store the packet;
• determine a first upper limit value of the first queue buffer based on a port sharing upper limit value of a first port buffer and a global sharing upper limit value of a global buffer, wherein the port sharing upper limit value is equal to a product of an available value of the first port buffer and a first coefficient, and the global sharing upper limit value is equal to a product of an available value of the global buffer and a second coefficient, and wherein the global buffer comprises at least one port buffer, the first port buffer is comprised in the at least one port buffer, the first port buffer comprises at least one queue buffer, and the first queue buffer is comprised in the at least one queue buffer;
• and
• process the packet based on the first upper limit value of the first queue buffer, an occupation value of the first queue buffer, and a size of the packet.