V2EX sequential-consistency

Sequential Consistency

释义 Definition

顺序一致性(顺序一致模型):并发/多处理器系统中的一种内存一致性保证。它要求:所有线程(或处理器)看到的内存读写结果,必须等价于把所有操作按某个全局顺序串行排列,并且每个线程自身的操作顺序仍保持为其程序中写下的顺序。
(注:实际硬件常比它更弱;顺序一致性通常是理想化/更强的模型。)

例句 Examples

This program assumes sequential consistency.
这个程序假设内存满足顺序一致性。

On modern CPUs, you may need memory fences to enforce sequential consistency across threads.
在现代 CPU 上,你可能需要使用内存屏障(memory fences)来在不同线程之间实现顺序一致性。

发音 Pronunciation (IPA)

/skwnl knsstnsi/

词源 Etymology

sequential 来自拉丁语 sequī(“跟随”),引申为“按顺序的”;consistency 来自拉丁语 consistere(“站在一起、保持不变”),引申为“一致性”。作为计算机体系结构/并发语境中的术语,sequential consistency 由计算机科学家 Leslie Lamport 在 1979 年系统提出并推广,用于精确定义多处理器下“看起来像按某个顺序依次发生”的内存行为。

相关词 Related Words

文学/著作中的用例 Literary Works

  • Leslie Lamport, How to Make a Multiprocessor Computer That Correctly Executes Multiprocess Programs(提出并定义顺序一致性)
  • Maurice Herlihy & Nir Shavit, The Art of Multiprocessor Programming(讨论顺序一致性及更强/更弱的一致性与并发对象)
  • John L. Hennessy & David A. Patterson, Computer Architecture: A Quantitative Approach(体系结构中的内存一致性模型,含顺序一致性对比)
  • Daniel J. Sorin, Mark D. Hill, David A. Wood, A Primer on Memory Consistency and Cache Coherence(内存一致性基础教材,涵盖顺序一致性)
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