forked from lijiext/lammps
97 lines
3.9 KiB
Plaintext
97 lines
3.9 KiB
Plaintext
|
/***************************************************************************
|
||
|
|
nvc_device.cu
|
||
|
|
-------------------
|
||
|
|
W. Michael Brown
|
||
|
|
|
||
|
|
Utilities for dealing with cuda devices
|
||
|
|
|
||
|
|
__________________________________________________________________________
|
||
|
|
This file is part of the NVC Library
|
||
|
|
__________________________________________________________________________
|
||
|
|
|
||
|
|
begin : Wed Jan 28 2009
|
||
|
|
copyright : (C) 2009 by W. Michael Brown
|
||
|
|
email : wmbrown@sandia.gov
|
||
|
|
***************************************************************************/
|
||
|
|
|
||
|
|
/* -----------------------------------------------------------------------
|
||
|
|
Copyright (2009) Sandia Corporation. Under the terms of Contract
|
||
|
|
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
|
||
|
|
certain rights in this software. This software is distributed under
|
||
|
|
the GNU General Public License.
|
||
|
|
----------------------------------------------------------------------- */
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include "nvc_macros.h"
|
||
|
|
#include "nvc_device.h"
|
||
|
|
|
||
|
|
// Grabs the properties for all devices
|
||
|
|
NVCDevice::NVCDevice() {
|
||
|
|
CUDA_SAFE_CALL(cudaGetDeviceCount(&_num_devices));
|
||
|
|
for (int dev=0; dev<_num_devices; ++dev) {
|
||
|
|
cudaDeviceProp deviceProp;
|
||
|
|
CUDA_SAFE_CALL(cudaGetDeviceProperties(&deviceProp, dev));
|
||
|
|
if (deviceProp.major == 9999 && deviceProp.minor == 9999)
|
||
|
|
break;
|
||
|
|
_properties.push_back(deviceProp);
|
||
|
|
}
|
||
|
|
_device=0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set the CUDA device to the specified device number
|
||
|
|
void NVCDevice::set(int num) {
|
||
|
|
if (_device==num)
|
||
|
|
return;
|
||
|
|
cudaThreadExit();
|
||
|
|
CUDA_SAFE_CALL(cudaSetDevice(num));
|
||
|
|
_device=num;
|
||
|
|
}
|
||
|
|
|
||
|
|
// List all devices along with all properties
|
||
|
|
void NVCDevice::print_all(ostream &out) {
|
||
|
|
if (num_devices() == 0)
|
||
|
|
printf("There is no device supporting CUDA\n");
|
||
|
|
for (int i=0; i<num_devices(); ++i) {
|
||
|
|
printf("\nDevice %d: \"%s\"\n", i, name(i).c_str());
|
||
|
|
printf(" Revision number: %.1f\n", revision(i));
|
||
|
|
printf(" Total amount of global memory: %.2f GB\n",
|
||
|
|
gigabytes(i));
|
||
|
|
#if CUDART_VERSION >= 2000
|
||
|
|
printf(" Number of multiprocessors: %d\n",
|
||
|
|
_properties[i].multiProcessorCount);
|
||
|
|
printf(" Number of cores: %d\n",cores(i));
|
||
|
|
#endif
|
||
|
|
printf(" Total amount of constant memory: %u bytes\n",
|
||
|
|
_properties[i].totalConstMem);
|
||
|
|
printf(" Total amount of shared memory per block: %u bytes\n",
|
||
|
|
_properties[i].sharedMemPerBlock);
|
||
|
|
printf(" Total number of registers available per block: %d\n",
|
||
|
|
_properties[i].regsPerBlock);
|
||
|
|
printf(" Warp size: %d\n",
|
||
|
|
_properties[i].warpSize);
|
||
|
|
printf(" Maximum number of threads per block: %d\n",
|
||
|
|
_properties[i].maxThreadsPerBlock);
|
||
|
|
printf(" Maximum sizes of each dimension of a block: %d x %d x %d\n",
|
||
|
|
_properties[i].maxThreadsDim[0],
|
||
|
|
_properties[i].maxThreadsDim[1],
|
||
|
|
_properties[i].maxThreadsDim[2]);
|
||
|
|
printf(" Maximum sizes of each dimension of a grid: %d x %d x %d\n",
|
||
|
|
_properties[i].maxGridSize[0],
|
||
|
|
_properties[i].maxGridSize[1],
|
||
|
|
_properties[i].maxGridSize[2]);
|
||
|
|
printf(" Maximum memory pitch: %u bytes\n",
|
||
|
|
_properties[i].memPitch);
|
||
|
|
printf(" Texture alignment: %u bytes\n",
|
||
|
|
_properties[i].textureAlignment);
|
||
|
|
printf(" Clock rate: %.2f GHz\n",
|
||
|
|
clock_rate(i));
|
||
|
|
#if CUDART_VERSION >= 2000
|
||
|
|
printf(" Concurrent copy and execution: %s\n",
|
||
|
|
_properties[i].deviceOverlap ? "Yes" : "No");
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|