如何在 cuda 5.5 中获得最大推力块 [英] how to get max blocks in thrust in cuda 5.5

问题描述

下面的 Thrust 函数可以获得 CUDA 启动 CUDA 5.0 的最大块数，该函数用于 CUSP 中的稀疏矩阵向量乘法 (SpMV)，它是一种为持久线程设置执行的技术.第一行是头文件.

The Thrust function below can get the maximum blocks of for a CUDA launch CUDA 5.0, which is used by Sparse Matrix Vector multiplication(SpMV) in CUSP, and it is a technique for setting up execution for persistent threads. The first line is the header file.

#include <thrust/detail/backend/cuda/arch.h>

thrust::detail::backend::cuda::arch::max_active_blocks(kernel<float,int,VECTORS_PER_BLOCK,TH    READS_PER_VECTOR>,THREADS_PER_BLOCK,(size_t)0)

但 CUDA 5.5 不支持该功能.CUDA 5.5 是否不支持这种技术，还是应该使用其他功能?

But the function is not supported by CUDA 5.5. Was this technique not supported by CUDA 5.5, or should I use some other function instead?

推荐答案

在任何版本的 Thrust 中都没有任何支持的方式来执行此计算.thrust/detail 内的标头和 detail 命名空间内的标识符是 Thrust 实现的一部分——它们不是公共特性.使用它们会破坏您的代码.

There was never any supported way to perform this computation in any version of Thrust. Headers inside thrust/detail and identifiers inside a detail namespace are part of Thrust's implementation -- they are not public features. Using them will break your code.

也就是说，在这个存储库中有一些实现占用计算器的独立代码:

That said, there's some standalone code implementing the occupancy calculator in this repository:

https://github.com/jaredhoberock/cuda_launch_config

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