《CUDA by Example》--chapter10 code 先来介绍CUDA中的一个函数:cudaHostAlloc(),理解这个函数,要和标准C语言中的()联系起来。malloc()函数是CPU在主存中开辟内存并返回指针,而cudaHostAlloc()是cuda在主存中开辟指定内存并返回指针。cuda开辟和CPU开辟的主存有什么不同?CPU是分配可分页的(Pagable)主机内存,而cu...
int main() { unsigned char* buffer = (unsigned char*)big_random_block(SIZE); unsigned int histo[256]; for (int i = 0; i < 256; i++) histo[i] = 0; cudaError_t Status; cudaEvent_t Start, Stop; Status = cudaEventCreate(&Start); Status = cudaEventCreate(&Stop); Status = cu...
哪些PTX和二进制代码嵌入到 CUDA C++ 应用程序中由-arch和-code编译器选项或-gencode编译器选项控制,详见 nvcc 用户手册。 例如: nvcc x.cu -gencode arch=compute_50,code=sm_50 -gencode arch=compute_60,code=sm_60 -gencode arch=compute_70,code=\"compute_70,sm_70\" 嵌入与计算能力 5.0 和 6.0...
p.23,25 - The #includes for this example are incorrectly shown as: #include <iostream> and #include "book.h." This has been corrected in the downloadable code package, but should read: #include <stdio.h> and #include "../common/book.h" ...
# Above this line, the code will remain exactly the same in the next version if tid == 0: partial_c[cuda.blockIdx.x] = s_block[0] # Example 4.6: A full dot product with mutex @cuda.jit def dot_mutex(mutex, a, b, c): ...
Each of these streams is defined by the following code sample as a sequence of one memory copy from host to device, one kernel launch, and one memory copy from device to host: Each stream copies its portion of input array hostPtr to array inputDevPtr in device memory, processes inputDev...
cppCopy code #include<iostream>#include<cuda_runtime.h>// CUDA核函数,将输入数组的每个元素乘以2__global__voidmultiplyByTwo(float*input,float*output,int size){int tid=blockIdx.x*blockDim.x+threadIdx.x;if(tid<size){output[tid]=input[tid]*2;}}intmain(){constintARRAY_SIZE=10;constintARR...
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The libdevice library is an LLVM bitcode library that implements common functions for GPU kernels. NVVM IR NVVM IR is a compiler IR (intermediate representation) based on the LLVM IR. The NVVM IR is designed to represent GPU compute kernels (for example, CUDA kernels). High-level language fr...
This Hello World sample demonstrates how to migrate a simple program from CUDA to code that is compliant with SYCL. Use it to verify that your development environment is set up correctly for the migration. Needleman Wunsch This sample represents a typical example of migrating a working Make...