403 lines
12 KiB
C++
403 lines
12 KiB
C++
/*
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Copyright (c) 2010-2011, Intel Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef _MSC_VER
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#define _CRT_SECURE_NO_WARNINGS
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#define NOMINMAX
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#pragma warning (disable: 4244)
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#pragma warning (disable: 4305)
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#endif
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#include <stdio.h>
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#include <algorithm>
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#include <string.h>
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#include "../timing.h"
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#include <iostream>
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#include <cuda.h>
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#include <vector>
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#include <cassert>
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#include "drvapi_error_string.h"
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#define checkCudaErrors(err) __checkCudaErrors (err, __FILE__, __LINE__)
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// These are the inline versions for all of the SDK helper functions
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void __checkCudaErrors(CUresult err, const char *file, const int line) {
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if(CUDA_SUCCESS != err) {
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std::cerr << "checkCudeErrors() Driver API error = " << err << "\""
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<< getCudaDrvErrorString(err) << "\" from file <" << file
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<< ", line " << line << "\n";
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exit(-1);
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}
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}
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extern "C"
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void mandelbrot_ispc(
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float x0, float y0,
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float x1, float y1,
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int width, int height,
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int maxIterations, int output[]) ;
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/**********************/
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/* Basic CUDriver API */
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CUcontext context;
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void createContext(const int deviceId = 0)
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{
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CUdevice device;
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int devCount;
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checkCudaErrors(cuInit(0));
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checkCudaErrors(cuDeviceGetCount(&devCount));
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assert(devCount > 0);
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checkCudaErrors(cuDeviceGet(&device, deviceId < devCount ? deviceId : 0));
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char name[128];
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checkCudaErrors(cuDeviceGetName(name, 128, device));
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std::cout << "Using CUDA Device [0]: " << name << "\n";
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int devMajor, devMinor;
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checkCudaErrors(cuDeviceComputeCapability(&devMajor, &devMinor, device));
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std::cout << "Device Compute Capability: "
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<< devMajor << "." << devMinor << "\n";
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if (devMajor < 2) {
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std::cerr << "ERROR: Device 0 is not SM 2.0 or greater\n";
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exit(1);
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}
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// Create driver context
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checkCudaErrors(cuCtxCreate(&context, 0, device));
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}
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void destroyContext()
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{
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checkCudaErrors(cuCtxDestroy(context));
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}
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CUmodule loadModule(const char * module)
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{
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CUmodule cudaModule;
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checkCudaErrors(cuModuleLoadData(&cudaModule, module));
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return cudaModule;
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}
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void unloadModule(CUmodule &cudaModule)
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{
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checkCudaErrors(cuModuleUnload(cudaModule));
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}
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CUfunction getFunction(CUmodule &cudaModule, const char * function)
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{
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CUfunction cudaFunction;
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checkCudaErrors(cuModuleGetFunction(&cudaFunction, cudaModule, function));
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return cudaFunction;
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}
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CUdeviceptr deviceMalloc(const size_t size)
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{
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CUdeviceptr d_buf;
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checkCudaErrors(cuMemAlloc(&d_buf, size));
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return d_buf;
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}
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void deviceFree(CUdeviceptr d_buf)
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{
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checkCudaErrors(cuMemFree(d_buf));
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}
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void memcpyD2H(void * h_buf, CUdeviceptr d_buf, const size_t size)
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{
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checkCudaErrors(cuMemcpyDtoH(h_buf, d_buf, size));
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}
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void memcpyH2D(CUdeviceptr d_buf, void * h_buf, const size_t size)
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{
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checkCudaErrors(cuMemcpyHtoD(d_buf, h_buf, size));
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}
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#define deviceLaunch(func,nbx,nby,nbz,params) \
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checkCudaErrors( \
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cuLaunchKernel( \
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(func), \
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((nbx-1)/(128/32)+1), (nby), (nbz), \
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128, 1, 1, \
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0, NULL, (params), NULL \
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));
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typedef CUdeviceptr devicePtr;
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/**************/
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#include <vector>
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std::vector<char> readBinary(const char * filename)
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{
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std::vector<char> buffer;
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FILE *fp = fopen(filename, "rb");
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if (!fp )
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{
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fprintf(stderr, "file %s not found\n", filename);
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assert(0);
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}
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#if 0
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char c;
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while ((c = fgetc(fp)) != EOF)
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buffer.push_back(c);
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#else
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fseek(fp, 0, SEEK_END);
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const unsigned long long size = ftell(fp); /*calc the size needed*/
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fseek(fp, 0, SEEK_SET);
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buffer.resize(size);
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if (fp == NULL){ /*ERROR detection if file == empty*/
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fprintf(stderr, "Error: There was an Error reading the file %s \n",filename);
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exit(1);
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}
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else if (fread(&buffer[0], sizeof(char), size, fp) != size){ /* if count of read bytes != calculated size of .bin file -> ERROR*/
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fprintf(stderr, "Error: There was an Error reading the file %s \n", filename);
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exit(1);
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}
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#endif
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fprintf(stderr, " read buffer of size= %d bytes \n", (int)buffer.size());
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return buffer;
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}
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extern "C"
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{
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#if 0
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struct ModuleManager
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{
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private:
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typedef std::pair<std::string, CUModule> ModulePair;
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typedef std::map <std::string, CUModule> ModuleMap;
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ModuleMap module_list;
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ModuleMap::iterator findModule(const char * module_name)
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{
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return module_list.find(std::string(module_name));
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}
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public:
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CUmodule loadModule(const char * module_name, const char * module_data)
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{
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const ModuleMap::iterator it = findModule(module_name)
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if (it != ModuleMap::end)
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{
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CUmodule cudaModule = loadModule(module);
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module_list.insert(std::make_pair(std::string(module_name), cudaModule));
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return cudaModule
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}
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return it->second;
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}
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void unloadModule(const char * module_name)
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{
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ModuleMap::iterator it = findModule(module_name)
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if (it != ModuleMap::end)
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module_list.erase(it);
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}
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};
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#endif
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void *CUDAAlloc(void **handlePtr, int64_t size, int32_t alignment)
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{
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#if 0
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fprintf(stderr, " ptr= %p\n", *handlePtr);
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fprintf(stderr, " size= %d\n", (int)size);
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fprintf(stderr, " alignment= %d\n", (int)alignment);
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fprintf(stderr, " ------- \n\n");
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#endif
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return NULL;
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}
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void CUDALaunch(
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void **handlePtr,
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const char * module_name,
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const char * module_1,
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const char * func_name,
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void **func_args,
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int countx, int county, int countz)
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{
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assert(module_name != NULL);
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assert(module_1 != NULL);
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assert(func_name != NULL);
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assert(func_args != NULL);
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#if 1
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const char * module = module_1;
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#else
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const std::vector<char> module_str = readBinary("kernel.cubin");
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const char * module = &module_str[0];
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#endif
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#if 1
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CUmodule cudaModule = loadModule(module);
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CUfunction cudaFunction = getFunction(cudaModule, func_name);
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deviceLaunch(cudaFunction, countx, county, countz, func_args);
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unloadModule(cudaModule);
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#else
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fprintf(stderr, " handle= %p\n", *handlePtr);
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fprintf(stderr, " count= %d %d %d\n", countx, county, countz);
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fprintf(stderr, " module_name= %s \n", module_name);
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fprintf(stderr, " func_name= %s \n", func_name);
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// fprintf(stderr, " ptx= %s \n", module);
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fprintf(stderr, " x0= %g \n", *((float*)(func_args[0])));
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fprintf(stderr, " dx= %g \n", *((float*)(func_args[1])));
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fprintf(stderr, " y0= %g \n", *((float*)(func_args[2])));
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fprintf(stderr, " dy= %g \n", *((float*)(func_args[3])));
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fprintf(stderr, " w= %d \n", *((int*)(func_args[4])));
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fprintf(stderr, " h= %d \n", *((int*)(func_args[5])));
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fprintf(stderr, " xs= %d \n", *((int*)(func_args[6])));
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fprintf(stderr, " ys= %d \n", *((int*)(func_args[7])));
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fprintf(stderr, " maxit= %d \n", *((int*)(func_args[8])));
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fprintf(stderr, " ptr= %p \n", *((int**)(func_args[9])));
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fprintf(stderr, " ------- \n\n");
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#endif
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}
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void CUDASync(void *handle)
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{
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checkCudaErrors(cuStreamSynchronize(0));
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}
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void ISPCSync(void *handle)
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{
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}
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void CUDAFree(void *handle)
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{
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}
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}
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/********************/
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extern void mandelbrot_serial(float x0, float y0, float x1, float y1,
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int width, int height, int maxIterations,
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int output[]);
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/* Write a PPM image file with the image of the Mandelbrot set */
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static void
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writePPM(int *buf, int width, int height, const char *fn) {
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FILE *fp = fopen(fn, "wb");
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fprintf(fp, "P6\n");
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fprintf(fp, "%d %d\n", width, height);
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fprintf(fp, "255\n");
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for (int i = 0; i < width*height; ++i) {
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// Map the iteration count to colors by just alternating between
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// two greys.
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char c = (buf[i] & 0x1) ? 240 : 20;
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for (int j = 0; j < 3; ++j)
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fputc(c, fp);
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}
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fclose(fp);
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printf("Wrote image file %s\n", fn);
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}
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static void usage() {
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fprintf(stderr, "usage: mandelbrot [--scale=<factor>]\n");
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exit(1);
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}
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int main(int argc, char *argv[]) {
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unsigned int width = 1536;
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unsigned int height = 1024;
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float x0 = -2;
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float x1 = 1;
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float y0 = -1;
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float y1 = 1;
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if (argc == 1)
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;
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else if (argc == 2) {
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if (strncmp(argv[1], "--scale=", 8) == 0) {
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float scale = atof(argv[1] + 8);
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if (scale == 0.f)
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usage();
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width *= scale;
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height *= scale;
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// round up to multiples of 16
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width = (width + 0xf) & ~0xf;
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height = (height + 0xf) & ~0xf;
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}
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else
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usage();
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}
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else
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usage();
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/*******************/
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createContext();
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/*******************/
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int maxIterations = 512;
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int *buf = new int[width*height];
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for (unsigned int i = 0; i < width*height; i++)
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buf[i] = 0;
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const size_t bufsize = sizeof(int)*width*height;
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devicePtr d_buf = deviceMalloc(bufsize);
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memcpyH2D(d_buf, buf, bufsize);
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//
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// Compute the image using the ispc implementation; report the minimum
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// time of three runs.
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//
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double minISPC = 1e30;
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for (int i = 0; i < 3; ++i) {
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// Clear out the buffer
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for (unsigned int i = 0; i < width * height; ++i)
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buf[i] = 0;
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reset_and_start_timer();
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mandelbrot_ispc(x0, y0, x1, y1, width, height, maxIterations, (int*)d_buf);
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double dt = get_elapsed_mcycles();
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minISPC = std::min(minISPC, dt);
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}
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memcpyD2H(buf, d_buf, bufsize);
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deviceFree(d_buf);
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printf("[mandelbrot ispc+tasks]:\t[%.3f] million cycles\n", minISPC);
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writePPM(buf, width, height, "mandelbrot-ispc.ppm");
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//
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// And run the serial implementation 3 times, again reporting the
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// minimum time.
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//
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double minSerial = 1e30;
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for (int i = 0; i < 3; ++i) {
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// Clear out the buffer
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for (unsigned int i = 0; i < width * height; ++i)
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buf[i] = 0;
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reset_and_start_timer();
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mandelbrot_serial(x0, y0, x1, y1, width, height, maxIterations, buf);
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double dt = get_elapsed_mcycles();
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minSerial = std::min(minSerial, dt);
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}
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printf("[mandelbrot serial]:\t\t[%.3f] million cycles\n", minSerial);
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writePPM(buf, width, height, "mandelbrot-serial.ppm");
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printf("\t\t\t\t(%.2fx speedup from ISPC + tasks)\n", minSerial/minISPC);
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return 0;
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}
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