公开(公告)号：US20140173258A1

公开(公告)日：2014-06-19

申请号：US13720746

申请日：2012-12-19

Applicant: NVIDIA CORPORATION

Inventor： Brian FAHS ,  Eric T. ANDERSON ,  Nick BARROW-WILLIAMS ,  Shirish GADRE ,  Joel James MCCORMACK ,  Bryon S. NORDQUIST ,  Nirmal Raj SAXENA ,  Lacky V. SHAH

IPC: G06F9/30

CPC classification number: G06F9/3887 ,  G06F9/3851 ,  G06F12/0284 ,  G06F12/0815 ,  G06F12/0844 ,  G06F2209/5018 ,  G06F2212/604

Abstract: A texture processing pipeline can be configured to service memory access requests that represent texture data access operations or generic data access operations. When the texture processing pipeline receives a memory access request that represents a texture data access operation, the texture processing pipeline may retrieve texture data based on texture coordinates. When the memory access request represents a generic data access operation, the texture pipeline extracts a virtual address from the memory access request and then retrieves data based on the virtual address. The texture processing pipeline is also configured to cache generic data retrieved on behalf of a group of threads and to then invalidate that generic data when the group of threads exits.

Abstract translation: 可以将纹理处理流水线配置为服务于表示纹理数据访问操作或通用数据访问操作的存储器访问请求。 当纹理处理流水线接收到表示纹理数据访问操作的存储器访问请求时，纹理处理流水线可以基于纹理坐标来检索纹理数据。 当存储器访问请求表示通用数据访问操作时，纹理流水线从存储器访问请求中提取虚拟地址，然后基于虚拟地址检索数据。 纹理处理流水线还被配置为缓存代表一组线程检索的通用数据，然后在线程组退出时使该通用数据无效。

公开(公告)号：US20140173193A1

公开(公告)日：2014-06-19

申请号：US13720755

申请日：2012-12-19

Applicant: NVIDIA CORPORATION

Inventor： Brian Fahs ,  Eric T. ANDERSON ,  Nick Barrow-Williams ,  Shirish GADRE ,  Joel James MCCORMACK ,  Bryon S. NORDQUIST ,  Nirmal Raj Saxena ,  Lacky V. Shah

IPC: G06F17/30 ,  G06F12/10

CPC classification number: G06F12/1027 ,  G06F12/1018

Abstract: A tag unit configured to manage a cache unit includes a coalescer that implements a set hashing function. The set hashing function maps a virtual address to a particular content-addressable memory unit (CAM). The coalescer implements the set hashing function by splitting the virtual address into upper, middle, and lower portions. The upper portion is further divided into even-indexed bits and odd-indexed bits. The even-indexed bits are reduced to a single bit using a XOR tree, and the odd-indexed are reduced in like fashion. Those single bits are combined with the middle portion of the virtual address to provide a CAM number that identifies a particular CAM. The identified CAM is queried to determine the presence of a tag portion of the virtual address, indicating a cache hit or cache miss.

Abstract translation: 配置为管理高速缓存单元的标签单元包括实现集合散列函数的聚结器。 集合散列函数将虚拟地址映射到特定的内容可寻址存储器单元（CAM）。 聚合器通过将虚拟地址分割成上部，中部和下部来实现集合散列函数。 上部分进一步分为偶数位和奇数索引位。 使用XOR树将偶数索引位减少到单个位，并且奇数索引以类似的方式减少。 这些单个位与虚拟地址的中间部分组合以提供识别特定CAM的CAM号码。 查询所识别的CAM以确定虚拟地址的标签部分的存在，指示高速缓存命中或高速缓存未命中。