Method, device and system for forwarding network data messages

Abstract

The invention provides a method, a device and a system for forwarding network data messages. The method comprises the following steps: acquiring data messages in a data stream according to the received data stream; performing network address translation (NAT) strategy matching according to the first data message in the data stream, and establishing an NAT relation table; and determining a central processing unit (CPU) for correspondingly forwarding other data messages except the first data message according to quintuple information before and after the other data messages except the first data message in the data stream are translated and the NAT relation table. By adopting the method, the device and the system, the data messages in the same data stream can be distributed to the same CPU for processing in the presence or absence of a network address port translation (NAPT) / NAT scene, and use of a lock and jitter of a CPU cache are reduced, so that the network forwarding performance is promoted.

Description

technical field [0001] The present invention relates to the technical field of computer communication, and more specifically, to a method, device and system for forwarding network data messages. Background technique [0002] RPS (Receive Packet Steering) is a software simulation hardware network card multi-queue technology, through the Hash classification of IP data flow, the data packets of the same IP flow are allocated to the same CPU for processing, and the network protocol stack is realized. The load balancing of soft interrupts on multiple CPUs greatly improves the performance of single-queue network card multi-CPU network forwarding devices. [0003] But after really understanding the working principle and implementation process of the RPS module, it is not difficult to find that its current implementation has a serious shortcoming: it cannot support the topology with network address translation. [0004] Network Address Translation (NAT for short) is a conversion te...

AI Technical Summary

Problems solved by technology

[0003] But after really understanding the working principle and implementation process of the RPS module, it is not difficult to find that its current implementation has a serious shortcoming: it cannot support the topology with network address translation

[0013] 1. Resources related to data flow need to be protected by locking, which brings complexity to software implementation

At the same time, due to mutual exclusion of locks, multi-cores cannot be completely parallelized, resulting in performance loss

[0014] 2. Data packets are frequently processed on different CPUs, causing CPU cache jitter and further affecting performance

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