Скачать или смотреть Open vSwitch packet processing optimization: a story on ARM architecture

Speaker: Yanqin Wei, ARM
Slides: https://www.openvswitch.org/support/o...


Increasing demand of network throughput poses challenges for server and networking equipment. Arm is a popular architecture in embedded systems and is launching products for server, which can provide useful features for packet processing. This presentation introduces our ongoing work of performance optimization on Arm and the new Arm features that can benefit the data path.

Arm has a weak memory model. Hardware re-ordering improves packet processing performance but it requires careful lock-free software implementation and correct ordering rules. The read-write concurrency library is a good place to take this advantage.



Atomics support is enhanced in the newer generations of Arm architecture. It solves some data contended and memory bouncing issues in large systems.



SIMD in Arm is better at parallel processing of small and contiguous data, which can improve some basic operators in OVS library. And the next generation of SIMD brings hope for parallel processing of large and non-contiguous data blocks. It can widen the scope to apply vector data processing.