e41a52bb
 Hu Chunming
1.优化数据读取线程；2. 添加A...
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#if !defined(__NVRTC_HELPER__)
#define __NVRTC_HELPER__ 1
#include <cuda.h>
#include <nvrtc.h>
#include <sstream>
#include <iostream>
#include <fstream>
#include <helper_cuda_drvapi.h>
#define NVRTC_SAFE_CALL(Name, x) \
do { \
nvrtcResult result = x; \
if (result != NVRTC_SUCCESS) { \
std::cerr << "\nerror: " << Name << " failed with error " << \
nvrtcGetErrorString(result); \
exit(1); \
} \
} while(0)
void compileFileToPTX(char *filename, int argc, const char **argv,
char **ptxResult, size_t *ptxResultSize)
{
std::ifstream inputFile(filename, std::ios::in | std::ios::binary |
std::ios::ate);
if (!inputFile.is_open())
{
std::cerr << "\nerror: unable to open " << filename << " for reading!\n";
exit(1);
}
std::streampos pos = inputFile.tellg();
size_t inputSize = (size_t)pos;
char * memBlock = new char [inputSize + 1];
inputFile.seekg (0, std::ios::beg);
inputFile.read (memBlock, inputSize);
inputFile.close();
memBlock[inputSize] = '\x0';
// compile
nvrtcProgram prog;
NVRTC_SAFE_CALL("nvrtcCreateProgram", nvrtcCreateProgram(&prog, memBlock,
filename, 0, NULL, NULL));
nvrtcResult res = nvrtcCompileProgram(prog, argc, argv);
// dump log
size_t logSize;
NVRTC_SAFE_CALL("nvrtcGetProgramLogSize", nvrtcGetProgramLogSize(prog, &logSize));
char *log = (char *) malloc(sizeof(char) * logSize + 1);
NVRTC_SAFE_CALL("nvrtcGetProgramLog", nvrtcGetProgramLog(prog, log));
log[logSize] = '\x0';
/*
std::cerr << "\n compilation log ---\n";
std::cerr << log;
std::cerr << "\n end log ---\n";
*/
free(log);
NVRTC_SAFE_CALL("nvrtcCompileProgram", res);
// fetch PTX
size_t ptxSize;
NVRTC_SAFE_CALL("nvrtcGetPTXSize", nvrtcGetPTXSize(prog, &ptxSize));
char *ptx = (char *) malloc(sizeof(char) * ptxSize);
NVRTC_SAFE_CALL("nvrtcGetPTX", nvrtcGetPTX(prog, ptx));
NVRTC_SAFE_CALL("nvrtcDestroyProgram", nvrtcDestroyProgram(&prog));
*ptxResult = ptx;
*ptxResultSize = ptxSize;
}
CUmodule loadPTX(char *ptx, int argc, char **argv)
{
CUmodule module;
CUcontext context;
int major = 0, minor = 0;
char deviceName[256];
// Picks the best CUDA device available
CUdevice cuDevice = findCudaDeviceDRV(argc, (const char **)argv);
// get compute capabilities and the devicename
checkCudaErrors(cuDeviceComputeCapability(&major, &minor, cuDevice));
checkCudaErrors(cuDeviceGetName(deviceName, 256, cuDevice));
printf("> GPU Device has SM %d.%d compute capability\n", major, minor);
checkCudaErrors(cuInit(0));
checkCudaErrors(cuDeviceGet(&cuDevice, 0));
checkCudaErrors(cuCtxCreate(&context, 0, cuDevice));
checkCudaErrors(cuModuleLoadDataEx(&module, ptx, 0, 0, 0));
return module;
}
#endif
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