mirror of
https://gitlab.com/ita1024/waf.git
synced 2024-11-22 01:46:15 +01:00
85 lines
3.6 KiB
Plaintext
85 lines
3.6 KiB
Plaintext
#include <stdio.h>
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#include <assert.h>
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#include <cuda.h>
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#include "test.h"
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// these macros are really really helpful
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# define CUDA_SAFE_CALL( call) { \
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cudaError err = call; \
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if( cudaSuccess != err) { \
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fprintf(stderr, "Cuda error in file '%s' in line %i : %s.\n", \
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__FILE__, __LINE__, cudaGetErrorString( err) ); \
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exit(EXIT_FAILURE); \
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} }
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#define CHECKLASTERROR { \
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cudaError_t err = cudaGetLastError(); \
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if (err != cudaSuccess) { \
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fprintf(stderr, "Cuda error in file '%s' in line %i : %s.\n", \
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__FILE__, __LINE__, cudaGetErrorString( err) ); \
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exit(EXIT_FAILURE); \
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} }
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#define SIZ 128
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__global__ void truc(unsigned int * buf) {
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if (threadIdx.x < SIZ) {
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buf[threadIdx.x] = buf[threadIdx.x] << 5;
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}
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__syncthreads();
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}
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int testcuda()
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{
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unsigned int* foo = (unsigned int*) malloc(SIZ * sizeof(unsigned int));
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for (int x = 0; x < SIZ; ++x) {
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foo[x] = 1;
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}
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unsigned int * recf = NULL;
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CUDA_SAFE_CALL( cudaMalloc((void **) &recf, SIZ * sizeof(unsigned int)) );
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CUDA_SAFE_CALL(cudaMemcpy(recf, foo, SIZ * sizeof(unsigned int), cudaMemcpyHostToDevice));
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truc<<<1, SIZ>>>(recf);
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CHECKLASTERROR
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CUDA_SAFE_CALL(cudaMemcpy(foo, recf, SIZ * sizeof(unsigned int), cudaMemcpyDeviceToHost));
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printf("2^5 -> %u\n", foo[5]);
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CUDA_SAFE_CALL(cudaFree(recf));
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/*
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int deviceCount;
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cudaGetDeviceCount(&deviceCount);
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printf("device count %d\n", deviceCount);
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cudaDeviceProp dP;
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cudaGetDeviceProperties(&dP, NULL);
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//printf("Max threads per block: %d\n", dP.maxThreadsPerBlock);
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//printf("Max Threads DIM: %d x %d x %d\n", dP.maxThreadsDim[0], dP.maxThreadsDim[1], dP.maxThreadsDim[2]);
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//printf("Max Grid Size: %d x %d x %d\n", dP.maxGridSize[0], dP.maxGridSize[1], dP.maxGridSize[2]);
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cudaDeviceProp* pDeviceProp = &dP;
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printf( "\nDevice Name \t - %s ", pDeviceProp->name );
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printf( "\n**************************************");
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printf( "\nTotal Global Memory\t\t -%d KB", pDeviceProp->totalGlobalMem/1024 );
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printf( "\nShared memory available per block \t - %d KB", pDeviceProp->sharedMemPerBlock/1024 );
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printf( "\nNumber of registers per thread block \t - %d", pDeviceProp->regsPerBlock );
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printf( "\nWarp size in threads \t - %d", pDeviceProp->warpSize );
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printf( "\nMemory Pitch \t - %d bytes", pDeviceProp->memPitch );
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printf( "\nMaximum threads per block \t - %d", pDeviceProp->maxThreadsPerBlock );
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printf( "\nMaximum Thread Dimension (block) \t - %d %d %d", pDeviceProp->maxThreadsDim[0], pDeviceProp->maxThreadsDim[1], pDeviceProp->maxThreadsDim[2] );
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printf( "\nMaximum Thread Dimension (grid) \t - %d %d %d", pDeviceProp->maxGridSize[0], pDeviceProp->maxGridSize[1], pDeviceProp->maxGridSize[2] );
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printf( "\nTotal constant memory \t - %d bytes", pDeviceProp->totalConstMem );
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printf( "\nCUDA ver \t - %d.%d", pDeviceProp->major, pDeviceProp->minor );
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printf( "\nClock rate \t - %d KHz", pDeviceProp->clockRate );
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printf( "\nTexture Alignment \t - %d bytes", pDeviceProp->textureAlignment );
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printf( "\nDevice Overlap \t - %s", pDeviceProp-> deviceOverlap?"Allowed":"Not Allowed" );
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printf( "\nNumber of Multi processors \t - %d\n", pDeviceProp->multiProcessorCount );
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*/
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return 0;
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}
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