SystemInformation.cpp

#include <OpenMPCD/SystemInformation.hpp>
 
#include <OpenMPCD/CUDA/Macros.hpp>
#include <OpenMPCD/CUDA/runtime.hpp>
#include <OpenMPCD/Exceptions.hpp>
 
#include <sys/sysinfo.h>
#include <unistd.h>
 
using namespace OpenMPCD;
 
const std::string SystemInformation::getHostname()
{
    static const std::size_t bufferSize = HOST_NAME_MAX + 1;
 
    char buffer[bufferSize];
 
    if(gethostname(buffer, bufferSize) != 0)
        OPENMPCD_THROW(Exception, "Call to `gethostname` failed.");
 
    return buffer;
}
 
std::size_t SystemInformation::getTotalPhysicalMainMemory()
{
    struct sysinfo info;
    if(sysinfo(&info) != 0)
        OPENMPCD_THROW(Exception, "Call to `sysinfo` failed.");
 
    std::size_t ret = info.mem_unit;
    ret *= info.totalram;
 
    return ret;
}
 
const std::vector<SystemInformation::CUDADevice> SystemInformation::getCUDADevices()
{
    int deviceCount;
    cudaGetDeviceCount(&deviceCount);
    OPENMPCD_CUDA_THROW_ON_ERROR;
 
    std::vector<CUDADevice> devices;
    devices.reserve(deviceCount);
 
    for(int i=0; i < deviceCount; ++i)
    {
        cudaDeviceProp properties;
        cudaGetDeviceProperties(&properties, i);
        OPENMPCD_CUDA_THROW_ON_ERROR;
 
        devices.push_back(CUDADevice());
        devices.back().name = properties.name;
        devices.back().globalMemory = properties.totalGlobalMem;
    }
 
    return devices;
}