求助：显卡核心的ROPs是什么？

gangdan

显卡核心的ROPs是什么？有什么功能？
常看到这个词，不明白什么意思

Sirlion

光栅单元，高特效下比重较高，大概是这样

gz_easy

http://en.wikipedia.org/wiki/Render_Output_unit
The Render Output Unit, often abbreviated as "ROP", and sometimes called (perhaps more properly) Raster Operations Pipeline, is one of the final steps in the rendering process of modern 3D accelerator boards. The pixel pipelines take pixel and texel information and process it, via specific matrix and vector operations, into a final pixel or depth value. The ROPs perform the transactions between the relevant buffers in the local memory - this includes writing or reading values, as well as blending them together.
Historically the number of ROPs, texture units, and pixel shaders have been equal. However, as of 2004, several GPUs have decoupled these areas to allow optimum transistor allocation for application workload and available memory performance. As the trend continues, it is expected that graphics processors will continue to decouple the various parts of their architectures to enhance their adaptability to future graphics applications. This design also allows chip makers to build a modular line-up, where the top-end GPU are essentially using the same logic as the low-end products.

xdyboa001

以前叫管线~如：16管6800,X800

clawhammer

以前叫管线~如：16管6800,X800
xdyboa001 发表于 2010-10-20 22:54

那你可就搞错了

xdyboa001

那你可就搞错了
clawhammer 发表于 2010-10-20 22:56

    请指正~

iamspy

那你可就搞错了
clawhammer 发表于 2010-10-20 22:56

错的是你。
DX9c开始，N和A的显卡才不对称的。以前就是1管线+1ROP的构成。

clawhammer

错的是你。
DX9c开始，N和A的显卡才不对称的。以前就是1管线+1ROP的构成。
iamspy 发表于 2010-10-20 23:16

PS pipeline=ROP？
就算1：1 ROP也不是俗称的管线

CC9K

1：1所以ROP就叫管线？

每一台电脑配一个电源是不是说明电源就是电脑？

iamspy

楼上2位很会钻字眼么。不过我估计你们其实啥都不清楚。
还有，你们小学语文估计不及格，因为你们根本不懂“类比”。
用传统显卡的管线给小白解释ROP是最直观的，传统显卡后端就是ROP+XTMU，最后MC。

garou

反正ROP越多越好就是了！

clawhammer

楼上2位很会钻字眼么。不过我估计你们其实啥都不清楚。
还有，你们小学语文估计不及格，因为你们根本不懂“ ...
iamspy 发表于 2010-10-21 08:17

你说我指出6楼的观点“ROP就是管线”不对 错了，你的意思不就是赞同6楼的观点“ROP就是俗称的管线”吗？？
我是不懂，但是ROP是干什么的还是知道

Edison

其实 ROP 这个名称也不是很准确，最好还是用 DX 里的 Output Merger，就是 输出合并器 ，强调了 final pixel，比 ROP 这个模糊的名字准确多了。

http://msdn.microsoft.com/en-us/library/bb205120%28VS.85%29.aspx

The output-merger (OM) stage generates the final rendered pixel color using a combination of pipeline state, the pixel data generated by the pixel shaders, the contents of the render targets, and the contents of the depth/stencil buffers. The OM stage is the final step for determining which pixels are visible (with depth-stencil testing) and blending the final pixel colors.

btw，当初 ROP 这个单词是由 NVIDIA 最先提出的，原本的写法是 Rolled Out Processor，不知道后来为何成了 Raster Operations Processor。

xdyboa001

你说我指出6楼的观点“ROP就是管线”不对 错了，你的意思不就是赞同6楼的观点“ROP就是俗称的管线”吗？？ ...
clawhammer 发表于 2010-10-21 10:02

    我还以为你懂~来装的啊，哈哈~~