关键词: 地址变换 用户级通信 RDMA

Abstract:

User-level communications alleviate the software overhead of the communication subsystem by allowing applications to access the network interface dire  ctly. For that purpose, efficient virtual-to-physical address translation is critical. In this paper, we propose an address- translation-table-based add  ress translation scheme where every translation is done on the network interface controller without OS involvement and without miss handling. Adopting t  his mechanism, we implement our communication subsystem CNI oriented to cluster systems based on PCI-X. The experimental results shows the lowest one-wa y latency 2.4μs and the 850MB/s peak bandwidth.

Key words: address translation;user-level communications, RDMA