A Network of Workstation is emerging as a cost-effective solution to high performance ocmputing. However, we need to lower the cost of communicating between the workstations to make this platform viable. With the advent of high-performance networks such as ATM and Myrinet, the physical network is no longer the communidcation bottleneck. Rather, the major overhead can now be attributed to software. This overhead is a direct result of the cost that a message incurs as it travels through different protection domains. We can alleviate this problem by allowing protected user-level access directly to the network, thereby eliminating the kernel from the critical path. This paper presents a description ofthe design, implementation and performance of a protected user-levelmessaging system over Myrinet, called MU-Net, that can handle multiple application processes concurrently. MU-Net has been implemented on the SUN Solaris 2.5 operating system.
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机译：工作站网络正在出现，它是一种针对高性能占用的经济高效的解决方案。但是，我们需要降低工作站之间的通信成本，以使该平台可行。随着诸如ATM和Myrinet之类的高性能网络的出现，物理网络不再是通信瓶颈。而是，主要的开销现在可以归因于软件。这种开销是消息在通过不同保护域传播时所产生的成本的直接结果。我们可以通过允许受保护的用户级别直接访问网络来缓解此问题，从而从关键路径中消除内核。本文介绍了Myrinet上受保护的用户级消息传递系统MU-Net的设计，实现和性能，该系统可以同时处理多个应用程序进程。 MU-Net已在SUN Solaris 2.5操作系统上实现。
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