ISO/IEC 13961:2000 信息技术-可升级的连贯接口

标准编号：ISO/IEC 13961:2000

中文名称：信息技术-可升级的连贯接口

英文名称：Information technology — Scalable Coherent Interface (SCI)

发布日期：2000-07

标准范围

可扩展一致性接口（SCI）提供类似于计算机总线的服务，但是，使用一组快速的点对点单向链路而不是总线来提供远端连接高性能多处理器系统需要更高的吞吐量。SCI支持用于紧密耦合系统的具有可选缓存一致性的分布式共享内存，以及松散耦合系统的消息传递。初始SCI链路定义为1 Gbyte/s（16位并行）和1 Gb/s（串行）。对于需要模块化封装的应用，可更换模块与连接器和电源一起指定。实现的数据包和协议事务被定义，其形式规范以计算机的形式提供程序。除了通常的读写事务，SCI还支持高效的多处理器锁事务。分布式缓存一致性协议是高效的可以从任意数量的传输故障中恢复。SCI协议确保转发尽管存在多处理器冲突（无死锁或饥饿），但仍能取得进展。

The scalable coherent interface (SCI) provides computer-bus-like services but,instead of a bus, uses a collection of fast point-to-point unidirectional links to provide the farhigher throughput needed for high-performance multiprocessor systems. SCI supportsdistributed, shared memory with optional cache coherence for tightly coupled systems, andmessage-passing for loosely coupled systems. Initial SCI links are defined at 1 Gbyte/s (16-bitparallel) and 1 Gb/s (serial). For applications requiring modular packaging, an interchangeablemodule is specified along with connector and power. The packets and protocols that implementtransactions are defined and their formal specification is provided in the form of computerprograms. In addition to the usual read-and-write transactions, SCI supports efficientmultiprocessor lock transactions. The distributed cache-coherence protocols are efficient andcan recover from an arbitrary number of transmission failures. SCI protocols ensure forwardprogress despite multiprocessor conflicts (no deadlocks or starvation).

标准预览图