V2EX memory bandwidth

Memory Bandwidth

释义 Definition

“内存带宽”指计算机内存系统在单位时间内能够传输的数据量上限,常用来衡量 CPU/GPU 与内存之间数据读写的吞吐能力(例如 GB/s)。它会影响数据密集型任务(如图形渲染、科学计算、机器学习推理/训练等)的性能。此术语在不同语境下也可能涉及显存带宽(VRAM bandwidth)等相关概念。

发音 Pronunciation (IPA)

/mmri bndwdθ/

例句 Examples

Memory bandwidth limits how fast the CPU can read data from RAM.
内存带宽限制了 CPU 从内存(RAM)读取数据的速度上限。

Even with a powerful GPU, insufficient memory bandwidth can bottleneck performance in high-resolution rendering and large matrix operations.
即使 GPU 很强,如果内存带宽不足,在高分辨率渲染和大型矩阵运算中也会成为性能瓶颈。

词源 Etymology

memory(记忆/存储器)在计算机语境中指“内存”;bandwidth 原意为“带宽”(band + width,“频带的宽度”),在通信与计算领域引申为“数据传输容量/吞吐量”。组合成 memory bandwidth,强调“内存子系统的数据传输能力”。

相关词 Related Words

文学与著作 Literary Works

  • Computer Architecture: A Quantitative Approach(John L. Hennessy, David A. Patterson)
  • Computer Organization and Design(David A. Patterson, John L. Hennessy)
  • Structured Computer Organization(Andrew S. Tanenbaum)
  • Computer Systems: A Programmer’s Perspective(Randal E. Bryant, David R. O’Hallaron)
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