mirror of
https://github.com/NVIDIA/cuda-samples.git
synced 2026-10-26 06:38:16 +08:00
Apply consistent code formatting across the repo. Add clang-format and pre-commit hooks.
This commit is contained in:
Rob Armstrong
@@ -27,16 +27,14 @@
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#include "FDTD3d.h"
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#include <iostream>
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#include <iomanip>
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#include "FDTD3dReference.h"
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#include "FDTD3dGPU.h"
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#include <helper_functions.h>
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#include <math.h>
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#include <assert.h>
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#include <helper_functions.h>
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#include <iomanip>
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#include <iostream>
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#include <math.h>
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#include "FDTD3dGPU.h"
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#include "FDTD3dReference.h"
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#ifndef CLAMP
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#define CLAMP(a, min, max) (MIN(max, MAX(a, min)))
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@@ -49,187 +47,186 @@
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bool runTest(int argc, const char **argv);
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void showHelp(const int argc, const char **argv);
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int main(int argc, char **argv) {
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bool bTestResult = false;
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// Start the log
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printf("%s Starting...\n\n", argv[0]);
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int main(int argc, char **argv)
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{
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bool bTestResult = false;
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// Start the log
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printf("%s Starting...\n\n", argv[0]);
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// Check help flag
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if (checkCmdLineFlag(argc, (const char **)argv, "help")) {
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printf("Displaying help on console\n");
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showHelp(argc, (const char **)argv);
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bTestResult = true;
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} else {
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// Execute
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bTestResult = runTest(argc, (const char **)argv);
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}
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// Check help flag
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if (checkCmdLineFlag(argc, (const char **)argv, "help")) {
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printf("Displaying help on console\n");
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showHelp(argc, (const char **)argv);
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bTestResult = true;
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}
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else {
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// Execute
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bTestResult = runTest(argc, (const char **)argv);
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}
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// Finish
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exit(bTestResult ? EXIT_SUCCESS : EXIT_FAILURE);
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// Finish
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exit(bTestResult ? EXIT_SUCCESS : EXIT_FAILURE);
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}
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void showHelp(const int argc, const char **argv) {
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if (argc > 0) std::cout << std::endl << argv[0] << std::endl;
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void showHelp(const int argc, const char **argv)
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{
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if (argc > 0)
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std::cout << std::endl << argv[0] << std::endl;
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std::cout << std::endl << "Syntax:" << std::endl;
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std::cout << std::left;
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std::cout << " " << std::setw(20) << "--device=<device>"
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<< "Specify device to use for execution" << std::endl;
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std::cout << " " << std::setw(20) << "--dimx=<N>"
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<< "Specify number of elements in x direction (excluding halo)"
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<< std::endl;
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std::cout << " " << std::setw(20) << "--dimy=<N>"
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<< "Specify number of elements in y direction (excluding halo)"
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<< std::endl;
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std::cout << " " << std::setw(20) << "--dimz=<N>"
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<< "Specify number of elements in z direction (excluding halo)"
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<< std::endl;
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std::cout << " " << std::setw(20) << "--radius=<N>"
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<< "Specify radius of stencil" << std::endl;
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std::cout << " " << std::setw(20) << "--timesteps=<N>"
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<< "Specify number of timesteps" << std::endl;
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std::cout << " " << std::setw(20) << "--block-size=<N>"
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<< "Specify number of threads per block" << std::endl;
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std::cout << std::endl;
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std::cout << " " << std::setw(20) << "--noprompt"
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<< "Skip prompt before exit" << std::endl;
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std::cout << std::endl;
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std::cout << std::endl << "Syntax:" << std::endl;
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std::cout << std::left;
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std::cout << " " << std::setw(20) << "--device=<device>"
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<< "Specify device to use for execution" << std::endl;
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std::cout << " " << std::setw(20) << "--dimx=<N>"
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<< "Specify number of elements in x direction (excluding halo)" << std::endl;
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std::cout << " " << std::setw(20) << "--dimy=<N>"
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<< "Specify number of elements in y direction (excluding halo)" << std::endl;
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std::cout << " " << std::setw(20) << "--dimz=<N>"
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<< "Specify number of elements in z direction (excluding halo)" << std::endl;
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std::cout << " " << std::setw(20) << "--radius=<N>"
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<< "Specify radius of stencil" << std::endl;
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std::cout << " " << std::setw(20) << "--timesteps=<N>"
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<< "Specify number of timesteps" << std::endl;
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std::cout << " " << std::setw(20) << "--block-size=<N>"
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<< "Specify number of threads per block" << std::endl;
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std::cout << std::endl;
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std::cout << " " << std::setw(20) << "--noprompt"
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<< "Skip prompt before exit" << std::endl;
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std::cout << std::endl;
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}
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bool runTest(int argc, const char **argv) {
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float *host_output;
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float *device_output;
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float *input;
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float *coeff;
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bool runTest(int argc, const char **argv)
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{
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float *host_output;
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float *device_output;
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float *input;
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float *coeff;
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int defaultDim;
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int dimx;
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int dimy;
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int dimz;
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int outerDimx;
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int outerDimy;
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int outerDimz;
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int radius;
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int timesteps;
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size_t volumeSize;
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memsize_t memsize;
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int defaultDim;
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int dimx;
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int dimy;
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int dimz;
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int outerDimx;
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int outerDimy;
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int outerDimz;
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int radius;
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int timesteps;
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size_t volumeSize;
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memsize_t memsize;
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const float lowerBound = 0.0f;
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const float upperBound = 1.0f;
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const float lowerBound = 0.0f;
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const float upperBound = 1.0f;
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// Determine default dimensions
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printf("Set-up, based upon target device GMEM size...\n");
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// Get the memory size of the target device
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printf(" getTargetDeviceGlobalMemSize\n");
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getTargetDeviceGlobalMemSize(&memsize, argc, argv);
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// Determine default dimensions
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printf("Set-up, based upon target device GMEM size...\n");
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// Get the memory size of the target device
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printf(" getTargetDeviceGlobalMemSize\n");
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getTargetDeviceGlobalMemSize(&memsize, argc, argv);
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// We can never use all the memory so to keep things simple we aim to
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// use around half the total memory
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memsize /= 2;
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// We can never use all the memory so to keep things simple we aim to
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// use around half the total memory
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memsize /= 2;
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// Most of our memory use is taken up by the input and output buffers -
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// two buffers of equal size - and for simplicity the volume is a cube:
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// dim = floor( (N/2)^(1/3) )
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defaultDim = (int)floor(pow((memsize / (2.0 * sizeof(float))), 1.0 / 3.0));
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// Most of our memory use is taken up by the input and output buffers -
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// two buffers of equal size - and for simplicity the volume is a cube:
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// dim = floor( (N/2)^(1/3) )
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defaultDim = (int)floor(pow((memsize / (2.0 * sizeof(float))), 1.0 / 3.0));
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// By default, make the volume edge size an integer multiple of 128B to
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// improve performance by coalescing memory accesses, in a real
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// application it would make sense to pad the lines accordingly
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int roundTarget = 128 / sizeof(float);
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defaultDim = defaultDim / roundTarget * roundTarget;
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defaultDim -= k_radius_default * 2;
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// By default, make the volume edge size an integer multiple of 128B to
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// improve performance by coalescing memory accesses, in a real
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// application it would make sense to pad the lines accordingly
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int roundTarget = 128 / sizeof(float);
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defaultDim = defaultDim / roundTarget * roundTarget;
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defaultDim -= k_radius_default * 2;
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// Check dimension is valid
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if (defaultDim < k_dim_min) {
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printf(
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"insufficient device memory (maximum volume on device is %d, must be "
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"between %d and %d).\n",
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defaultDim, k_dim_min, k_dim_max);
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exit(EXIT_FAILURE);
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} else if (defaultDim > k_dim_max) {
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defaultDim = k_dim_max;
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}
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// Check dimension is valid
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if (defaultDim < k_dim_min) {
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printf("insufficient device memory (maximum volume on device is %d, must be "
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"between %d and %d).\n",
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defaultDim,
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k_dim_min,
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k_dim_max);
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exit(EXIT_FAILURE);
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}
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else if (defaultDim > k_dim_max) {
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defaultDim = k_dim_max;
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}
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// For QA testing, override default volume size
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if (checkCmdLineFlag(argc, argv, "qatest")) {
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defaultDim = MIN(defaultDim, k_dim_qa);
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}
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// For QA testing, override default volume size
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if (checkCmdLineFlag(argc, argv, "qatest")) {
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defaultDim = MIN(defaultDim, k_dim_qa);
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}
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// set default dim
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dimx = defaultDim;
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dimy = defaultDim;
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dimz = defaultDim;
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radius = k_radius_default;
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timesteps = k_timesteps_default;
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// set default dim
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dimx = defaultDim;
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dimy = defaultDim;
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dimz = defaultDim;
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radius = k_radius_default;
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timesteps = k_timesteps_default;
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// Parse command line arguments
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if (checkCmdLineFlag(argc, argv, "dimx")) {
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dimx =
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CLAMP(getCmdLineArgumentInt(argc, argv, "dimx"), k_dim_min, k_dim_max);
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}
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// Parse command line arguments
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if (checkCmdLineFlag(argc, argv, "dimx")) {
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dimx = CLAMP(getCmdLineArgumentInt(argc, argv, "dimx"), k_dim_min, k_dim_max);
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}
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if (checkCmdLineFlag(argc, argv, "dimy")) {
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dimy =
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CLAMP(getCmdLineArgumentInt(argc, argv, "dimy"), k_dim_min, k_dim_max);
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}
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if (checkCmdLineFlag(argc, argv, "dimy")) {
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dimy = CLAMP(getCmdLineArgumentInt(argc, argv, "dimy"), k_dim_min, k_dim_max);
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}
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if (checkCmdLineFlag(argc, argv, "dimz")) {
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dimz =
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CLAMP(getCmdLineArgumentInt(argc, argv, "dimz"), k_dim_min, k_dim_max);
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}
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if (checkCmdLineFlag(argc, argv, "dimz")) {
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dimz = CLAMP(getCmdLineArgumentInt(argc, argv, "dimz"), k_dim_min, k_dim_max);
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}
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if (checkCmdLineFlag(argc, argv, "radius")) {
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radius = CLAMP(getCmdLineArgumentInt(argc, argv, "radius"), k_radius_min,
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k_radius_max);
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}
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if (checkCmdLineFlag(argc, argv, "radius")) {
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radius = CLAMP(getCmdLineArgumentInt(argc, argv, "radius"), k_radius_min, k_radius_max);
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}
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if (checkCmdLineFlag(argc, argv, "timesteps")) {
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timesteps = CLAMP(getCmdLineArgumentInt(argc, argv, "timesteps"),
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k_timesteps_min, k_timesteps_max);
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}
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if (checkCmdLineFlag(argc, argv, "timesteps")) {
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timesteps = CLAMP(getCmdLineArgumentInt(argc, argv, "timesteps"), k_timesteps_min, k_timesteps_max);
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}
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// Determine volume size
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outerDimx = dimx + 2 * radius;
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outerDimy = dimy + 2 * radius;
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outerDimz = dimz + 2 * radius;
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volumeSize = outerDimx * outerDimy * outerDimz;
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// Determine volume size
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outerDimx = dimx + 2 * radius;
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outerDimy = dimy + 2 * radius;
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outerDimz = dimz + 2 * radius;
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volumeSize = outerDimx * outerDimy * outerDimz;
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// Allocate memory
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host_output = (float *)calloc(volumeSize, sizeof(float));
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input = (float *)malloc(volumeSize * sizeof(float));
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coeff = (float *)malloc((radius + 1) * sizeof(float));
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// Allocate memory
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host_output = (float *)calloc(volumeSize, sizeof(float));
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input = (float *)malloc(volumeSize * sizeof(float));
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coeff = (float *)malloc((radius + 1) * sizeof(float));
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// Create coefficients
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for (int i = 0; i <= radius; i++) {
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coeff[i] = 0.1f;
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}
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// Create coefficients
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for (int i = 0; i <= radius; i++) {
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coeff[i] = 0.1f;
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}
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// Generate data
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printf(" generateRandomData\n\n");
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generateRandomData(input, outerDimx, outerDimy, outerDimz, lowerBound,
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upperBound);
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printf(
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"FDTD on %d x %d x %d volume with symmetric filter radius %d for %d "
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"timesteps...\n\n",
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dimx, dimy, dimz, radius, timesteps);
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// Generate data
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printf(" generateRandomData\n\n");
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generateRandomData(input, outerDimx, outerDimy, outerDimz, lowerBound, upperBound);
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printf("FDTD on %d x %d x %d volume with symmetric filter radius %d for %d "
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"timesteps...\n\n",
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dimx,
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dimy,
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dimz,
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radius,
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timesteps);
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// Execute on the host
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printf("fdtdReference...\n");
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fdtdReference(host_output, input, coeff, dimx, dimy, dimz, radius, timesteps);
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printf("fdtdReference complete\n");
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// Execute on the host
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printf("fdtdReference...\n");
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fdtdReference(host_output, input, coeff, dimx, dimy, dimz, radius, timesteps);
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printf("fdtdReference complete\n");
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// Allocate memory
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device_output = (float *)calloc(volumeSize, sizeof(float));
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// Allocate memory
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device_output = (float *)calloc(volumeSize, sizeof(float));
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// Execute on the device
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printf("fdtdGPU...\n");
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fdtdGPU(device_output, input, coeff, dimx, dimy, dimz, radius, timesteps,
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argc, argv);
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printf("fdtdGPU complete\n");
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// Execute on the device
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printf("fdtdGPU...\n");
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fdtdGPU(device_output, input, coeff, dimx, dimy, dimz, radius, timesteps, argc, argv);
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printf("fdtdGPU complete\n");
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// Compare the results
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float tolerance = 0.0001f;
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printf("\nCompareData (tolerance %f)...\n", tolerance);
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return compareData(device_output, host_output, dimx, dimy, dimz, radius,
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tolerance);
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// Compare the results
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float tolerance = 0.0001f;
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printf("\nCompareData (tolerance %f)...\n", tolerance);
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return compareData(device_output, host_output, dimx, dimy, dimz, radius, tolerance);
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}
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@@ -25,239 +25,236 @@
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "FDTD3dGPU.h"
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#include <iostream>
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#include <algorithm>
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#include <helper_functions.h>
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#include <helper_cuda.h>
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#include <helper_functions.h>
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#include <iostream>
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#include "FDTD3dGPU.h"
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#include "FDTD3dGPUKernel.cuh"
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bool getTargetDeviceGlobalMemSize(memsize_t *result, const int argc,
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const char **argv) {
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int deviceCount = 0;
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int targetDevice = 0;
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size_t memsize = 0;
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bool getTargetDeviceGlobalMemSize(memsize_t *result, const int argc, const char **argv)
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{
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int deviceCount = 0;
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int targetDevice = 0;
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size_t memsize = 0;
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// Get the number of CUDA enabled GPU devices
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printf(" cudaGetDeviceCount\n");
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checkCudaErrors(cudaGetDeviceCount(&deviceCount));
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// Get the number of CUDA enabled GPU devices
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printf(" cudaGetDeviceCount\n");
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checkCudaErrors(cudaGetDeviceCount(&deviceCount));
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// Select target device (device 0 by default)
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targetDevice = findCudaDevice(argc, (const char **)argv);
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// Select target device (device 0 by default)
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targetDevice = findCudaDevice(argc, (const char **)argv);
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// Query target device for maximum memory allocation
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printf(" cudaGetDeviceProperties\n");
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struct cudaDeviceProp deviceProp;
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checkCudaErrors(cudaGetDeviceProperties(&deviceProp, targetDevice));
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// Query target device for maximum memory allocation
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printf(" cudaGetDeviceProperties\n");
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struct cudaDeviceProp deviceProp;
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checkCudaErrors(cudaGetDeviceProperties(&deviceProp, targetDevice));
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memsize = deviceProp.totalGlobalMem;
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memsize = deviceProp.totalGlobalMem;
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// Save the result
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*result = (memsize_t)memsize;
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return true;
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// Save the result
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*result = (memsize_t)memsize;
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return true;
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}
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bool fdtdGPU(float *output, const float *input, const float *coeff,
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const int dimx, const int dimy, const int dimz, const int radius,
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const int timesteps, const int argc, const char **argv) {
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const int outerDimx = dimx + 2 * radius;
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const int outerDimy = dimy + 2 * radius;
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const int outerDimz = dimz + 2 * radius;
|
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const size_t volumeSize = outerDimx * outerDimy * outerDimz;
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int deviceCount = 0;
|
||||
int targetDevice = 0;
|
||||
float *bufferOut = 0;
|
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float *bufferIn = 0;
|
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dim3 dimBlock;
|
||||
dim3 dimGrid;
|
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bool fdtdGPU(float *output,
|
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const float *input,
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||||
const float *coeff,
|
||||
const int dimx,
|
||||
const int dimy,
|
||||
const int dimz,
|
||||
const int radius,
|
||||
const int timesteps,
|
||||
const int argc,
|
||||
const char **argv)
|
||||
{
|
||||
const int outerDimx = dimx + 2 * radius;
|
||||
const int outerDimy = dimy + 2 * radius;
|
||||
const int outerDimz = dimz + 2 * radius;
|
||||
const size_t volumeSize = outerDimx * outerDimy * outerDimz;
|
||||
int deviceCount = 0;
|
||||
int targetDevice = 0;
|
||||
float *bufferOut = 0;
|
||||
float *bufferIn = 0;
|
||||
dim3 dimBlock;
|
||||
dim3 dimGrid;
|
||||
|
||||
// Ensure that the inner data starts on a 128B boundary
|
||||
const int padding = (128 / sizeof(float)) - radius;
|
||||
const size_t paddedVolumeSize = volumeSize + padding;
|
||||
// Ensure that the inner data starts on a 128B boundary
|
||||
const int padding = (128 / sizeof(float)) - radius;
|
||||
const size_t paddedVolumeSize = volumeSize + padding;
|
||||
|
||||
#ifdef GPU_PROFILING
|
||||
cudaEvent_t profileStart = 0;
|
||||
cudaEvent_t profileEnd = 0;
|
||||
const int profileTimesteps = timesteps - 1;
|
||||
cudaEvent_t profileStart = 0;
|
||||
cudaEvent_t profileEnd = 0;
|
||||
const int profileTimesteps = timesteps - 1;
|
||||
|
||||
if (profileTimesteps < 1) {
|
||||
printf(
|
||||
" cannot profile with fewer than two timesteps (timesteps=%d), "
|
||||
"profiling is disabled.\n",
|
||||
timesteps);
|
||||
}
|
||||
if (profileTimesteps < 1) {
|
||||
printf(" cannot profile with fewer than two timesteps (timesteps=%d), "
|
||||
"profiling is disabled.\n",
|
||||
timesteps);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
// Check the radius is valid
|
||||
if (radius != RADIUS) {
|
||||
printf("radius is invalid, must be %d - see kernel for details.\n", RADIUS);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
// Check the radius is valid
|
||||
if (radius != RADIUS) {
|
||||
printf("radius is invalid, must be %d - see kernel for details.\n", RADIUS);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
// Get the number of CUDA enabled GPU devices
|
||||
checkCudaErrors(cudaGetDeviceCount(&deviceCount));
|
||||
// Get the number of CUDA enabled GPU devices
|
||||
checkCudaErrors(cudaGetDeviceCount(&deviceCount));
|
||||
|
||||
// Select target device (device 0 by default)
|
||||
targetDevice = findCudaDevice(argc, (const char **)argv);
|
||||
// Select target device (device 0 by default)
|
||||
targetDevice = findCudaDevice(argc, (const char **)argv);
|
||||
|
||||
checkCudaErrors(cudaSetDevice(targetDevice));
|
||||
checkCudaErrors(cudaSetDevice(targetDevice));
|
||||
|
||||
// Allocate memory buffers
|
||||
checkCudaErrors(
|
||||
cudaMalloc((void **)&bufferOut, paddedVolumeSize * sizeof(float)));
|
||||
checkCudaErrors(
|
||||
cudaMalloc((void **)&bufferIn, paddedVolumeSize * sizeof(float)));
|
||||
// Allocate memory buffers
|
||||
checkCudaErrors(cudaMalloc((void **)&bufferOut, paddedVolumeSize * sizeof(float)));
|
||||
checkCudaErrors(cudaMalloc((void **)&bufferIn, paddedVolumeSize * sizeof(float)));
|
||||
|
||||
// Check for a command-line specified block size
|
||||
int userBlockSize;
|
||||
// Check for a command-line specified block size
|
||||
int userBlockSize;
|
||||
|
||||
if (checkCmdLineFlag(argc, (const char **)argv, "block-size")) {
|
||||
userBlockSize = getCmdLineArgumentInt(argc, argv, "block-size");
|
||||
// Constrain to a multiple of k_blockDimX
|
||||
userBlockSize = (userBlockSize / k_blockDimX * k_blockDimX);
|
||||
if (checkCmdLineFlag(argc, (const char **)argv, "block-size")) {
|
||||
userBlockSize = getCmdLineArgumentInt(argc, argv, "block-size");
|
||||
// Constrain to a multiple of k_blockDimX
|
||||
userBlockSize = (userBlockSize / k_blockDimX * k_blockDimX);
|
||||
|
||||
// Constrain within allowed bounds
|
||||
userBlockSize = MIN(MAX(userBlockSize, k_blockSizeMin), k_blockSizeMax);
|
||||
} else {
|
||||
userBlockSize = k_blockSizeMax;
|
||||
}
|
||||
// Constrain within allowed bounds
|
||||
userBlockSize = MIN(MAX(userBlockSize, k_blockSizeMin), k_blockSizeMax);
|
||||
}
|
||||
else {
|
||||
userBlockSize = k_blockSizeMax;
|
||||
}
|
||||
|
||||
// Check the device limit on the number of threads
|
||||
struct cudaFuncAttributes funcAttrib;
|
||||
checkCudaErrors(cudaFuncGetAttributes(&funcAttrib, FiniteDifferencesKernel));
|
||||
// Check the device limit on the number of threads
|
||||
struct cudaFuncAttributes funcAttrib;
|
||||
checkCudaErrors(cudaFuncGetAttributes(&funcAttrib, FiniteDifferencesKernel));
|
||||
|
||||
userBlockSize = MIN(userBlockSize, funcAttrib.maxThreadsPerBlock);
|
||||
userBlockSize = MIN(userBlockSize, funcAttrib.maxThreadsPerBlock);
|
||||
|
||||
// Set the block size
|
||||
dimBlock.x = k_blockDimX;
|
||||
// Visual Studio 2005 does not like std::min
|
||||
// dimBlock.y = std::min<size_t>(userBlockSize / k_blockDimX,
|
||||
// (size_t)k_blockDimMaxY);
|
||||
dimBlock.y = ((userBlockSize / k_blockDimX) < (size_t)k_blockDimMaxY)
|
||||
? (userBlockSize / k_blockDimX)
|
||||
: (size_t)k_blockDimMaxY;
|
||||
dimGrid.x = (unsigned int)ceil((float)dimx / dimBlock.x);
|
||||
dimGrid.y = (unsigned int)ceil((float)dimy / dimBlock.y);
|
||||
printf(" set block size to %dx%d\n", dimBlock.x, dimBlock.y);
|
||||
printf(" set grid size to %dx%d\n", dimGrid.x, dimGrid.y);
|
||||
// Set the block size
|
||||
dimBlock.x = k_blockDimX;
|
||||
// Visual Studio 2005 does not like std::min
|
||||
// dimBlock.y = std::min<size_t>(userBlockSize / k_blockDimX,
|
||||
// (size_t)k_blockDimMaxY);
|
||||
dimBlock.y = ((userBlockSize / k_blockDimX) < (size_t)k_blockDimMaxY) ? (userBlockSize / k_blockDimX)
|
||||
: (size_t)k_blockDimMaxY;
|
||||
dimGrid.x = (unsigned int)ceil((float)dimx / dimBlock.x);
|
||||
dimGrid.y = (unsigned int)ceil((float)dimy / dimBlock.y);
|
||||
printf(" set block size to %dx%d\n", dimBlock.x, dimBlock.y);
|
||||
printf(" set grid size to %dx%d\n", dimGrid.x, dimGrid.y);
|
||||
|
||||
// Check the block size is valid
|
||||
if (dimBlock.x < RADIUS || dimBlock.y < RADIUS) {
|
||||
printf("invalid block size, x (%d) and y (%d) must be >= radius (%d).\n",
|
||||
dimBlock.x, dimBlock.y, RADIUS);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
// Check the block size is valid
|
||||
if (dimBlock.x < RADIUS || dimBlock.y < RADIUS) {
|
||||
printf("invalid block size, x (%d) and y (%d) must be >= radius (%d).\n", dimBlock.x, dimBlock.y, RADIUS);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
// Copy the input to the device input buffer
|
||||
checkCudaErrors(cudaMemcpy(bufferIn + padding, input,
|
||||
volumeSize * sizeof(float),
|
||||
cudaMemcpyHostToDevice));
|
||||
// Copy the input to the device input buffer
|
||||
checkCudaErrors(cudaMemcpy(bufferIn + padding, input, volumeSize * sizeof(float), cudaMemcpyHostToDevice));
|
||||
|
||||
// Copy the input to the device output buffer (actually only need the halo)
|
||||
checkCudaErrors(cudaMemcpy(bufferOut + padding, input,
|
||||
volumeSize * sizeof(float),
|
||||
cudaMemcpyHostToDevice));
|
||||
// Copy the input to the device output buffer (actually only need the halo)
|
||||
checkCudaErrors(cudaMemcpy(bufferOut + padding, input, volumeSize * sizeof(float), cudaMemcpyHostToDevice));
|
||||
|
||||
// Copy the coefficients to the device coefficient buffer
|
||||
checkCudaErrors(
|
||||
cudaMemcpyToSymbol(stencil, (void *)coeff, (radius + 1) * sizeof(float)));
|
||||
// Copy the coefficients to the device coefficient buffer
|
||||
checkCudaErrors(cudaMemcpyToSymbol(stencil, (void *)coeff, (radius + 1) * sizeof(float)));
|
||||
|
||||
#ifdef GPU_PROFILING
|
||||
|
||||
// Create the events
|
||||
checkCudaErrors(cudaEventCreate(&profileStart));
|
||||
checkCudaErrors(cudaEventCreate(&profileEnd));
|
||||
// Create the events
|
||||
checkCudaErrors(cudaEventCreate(&profileStart));
|
||||
checkCudaErrors(cudaEventCreate(&profileEnd));
|
||||
|
||||
#endif
|
||||
|
||||
// Execute the FDTD
|
||||
float *bufferSrc = bufferIn + padding;
|
||||
float *bufferDst = bufferOut + padding;
|
||||
printf(" GPU FDTD loop\n");
|
||||
// Execute the FDTD
|
||||
float *bufferSrc = bufferIn + padding;
|
||||
float *bufferDst = bufferOut + padding;
|
||||
printf(" GPU FDTD loop\n");
|
||||
|
||||
#ifdef GPU_PROFILING
|
||||
// Enqueue start event
|
||||
checkCudaErrors(cudaEventRecord(profileStart, 0));
|
||||
// Enqueue start event
|
||||
checkCudaErrors(cudaEventRecord(profileStart, 0));
|
||||
#endif
|
||||
|
||||
for (int it = 0; it < timesteps; it++) {
|
||||
printf("\tt = %d ", it);
|
||||
for (int it = 0; it < timesteps; it++) {
|
||||
printf("\tt = %d ", it);
|
||||
|
||||
// Launch the kernel
|
||||
printf("launch kernel\n");
|
||||
FiniteDifferencesKernel<<<dimGrid, dimBlock>>>(bufferDst, bufferSrc, dimx,
|
||||
dimy, dimz);
|
||||
// Launch the kernel
|
||||
printf("launch kernel\n");
|
||||
FiniteDifferencesKernel<<<dimGrid, dimBlock>>>(bufferDst, bufferSrc, dimx, dimy, dimz);
|
||||
|
||||
// Toggle the buffers
|
||||
// Visual Studio 2005 does not like std::swap
|
||||
// std::swap<float *>(bufferSrc, bufferDst);
|
||||
float *tmp = bufferDst;
|
||||
bufferDst = bufferSrc;
|
||||
bufferSrc = tmp;
|
||||
}
|
||||
// Toggle the buffers
|
||||
// Visual Studio 2005 does not like std::swap
|
||||
// std::swap<float *>(bufferSrc, bufferDst);
|
||||
float *tmp = bufferDst;
|
||||
bufferDst = bufferSrc;
|
||||
bufferSrc = tmp;
|
||||
}
|
||||
|
||||
printf("\n");
|
||||
printf("\n");
|
||||
|
||||
#ifdef GPU_PROFILING
|
||||
// Enqueue end event
|
||||
checkCudaErrors(cudaEventRecord(profileEnd, 0));
|
||||
// Enqueue end event
|
||||
checkCudaErrors(cudaEventRecord(profileEnd, 0));
|
||||
#endif
|
||||
|
||||
// Wait for the kernel to complete
|
||||
checkCudaErrors(cudaDeviceSynchronize());
|
||||
// Wait for the kernel to complete
|
||||
checkCudaErrors(cudaDeviceSynchronize());
|
||||
|
||||
// Read the result back, result is in bufferSrc (after final toggle)
|
||||
checkCudaErrors(cudaMemcpy(output, bufferSrc, volumeSize * sizeof(float),
|
||||
cudaMemcpyDeviceToHost));
|
||||
// Read the result back, result is in bufferSrc (after final toggle)
|
||||
checkCudaErrors(cudaMemcpy(output, bufferSrc, volumeSize * sizeof(float), cudaMemcpyDeviceToHost));
|
||||
|
||||
// Report time
|
||||
#ifdef GPU_PROFILING
|
||||
float elapsedTimeMS = 0;
|
||||
float elapsedTimeMS = 0;
|
||||
|
||||
if (profileTimesteps > 0) {
|
||||
checkCudaErrors(
|
||||
cudaEventElapsedTime(&elapsedTimeMS, profileStart, profileEnd));
|
||||
}
|
||||
if (profileTimesteps > 0) {
|
||||
checkCudaErrors(cudaEventElapsedTime(&elapsedTimeMS, profileStart, profileEnd));
|
||||
}
|
||||
|
||||
if (profileTimesteps > 0) {
|
||||
// Convert milliseconds to seconds
|
||||
double elapsedTime = elapsedTimeMS * 1.0e-3;
|
||||
double avgElapsedTime = elapsedTime / (double)profileTimesteps;
|
||||
// Determine number of computations per timestep
|
||||
size_t pointsComputed = dimx * dimy * dimz;
|
||||
// Determine throughput
|
||||
double throughputM = 1.0e-6 * (double)pointsComputed / avgElapsedTime;
|
||||
printf(
|
||||
"FDTD3d, Throughput = %.4f MPoints/s, Time = %.5f s, Size = %u Points, "
|
||||
"NumDevsUsed = %u, Blocksize = %u\n",
|
||||
throughputM, avgElapsedTime, pointsComputed, 1,
|
||||
dimBlock.x * dimBlock.y);
|
||||
}
|
||||
if (profileTimesteps > 0) {
|
||||
// Convert milliseconds to seconds
|
||||
double elapsedTime = elapsedTimeMS * 1.0e-3;
|
||||
double avgElapsedTime = elapsedTime / (double)profileTimesteps;
|
||||
// Determine number of computations per timestep
|
||||
size_t pointsComputed = dimx * dimy * dimz;
|
||||
// Determine throughput
|
||||
double throughputM = 1.0e-6 * (double)pointsComputed / avgElapsedTime;
|
||||
printf("FDTD3d, Throughput = %.4f MPoints/s, Time = %.5f s, Size = %u Points, "
|
||||
"NumDevsUsed = %u, Blocksize = %u\n",
|
||||
throughputM,
|
||||
avgElapsedTime,
|
||||
pointsComputed,
|
||||
1,
|
||||
dimBlock.x * dimBlock.y);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
// Cleanup
|
||||
if (bufferIn) {
|
||||
checkCudaErrors(cudaFree(bufferIn));
|
||||
}
|
||||
// Cleanup
|
||||
if (bufferIn) {
|
||||
checkCudaErrors(cudaFree(bufferIn));
|
||||
}
|
||||
|
||||
if (bufferOut) {
|
||||
checkCudaErrors(cudaFree(bufferOut));
|
||||
}
|
||||
if (bufferOut) {
|
||||
checkCudaErrors(cudaFree(bufferOut));
|
||||
}
|
||||
|
||||
#ifdef GPU_PROFILING
|
||||
|
||||
if (profileStart) {
|
||||
checkCudaErrors(cudaEventDestroy(profileStart));
|
||||
}
|
||||
if (profileStart) {
|
||||
checkCudaErrors(cudaEventDestroy(profileStart));
|
||||
}
|
||||
|
||||
if (profileEnd) {
|
||||
checkCudaErrors(cudaEventDestroy(profileEnd));
|
||||
}
|
||||
if (profileEnd) {
|
||||
checkCudaErrors(cudaEventDestroy(profileEnd));
|
||||
}
|
||||
|
||||
#endif
|
||||
return true;
|
||||
return true;
|
||||
}
|
||||
|
||||
@@ -27,152 +27,165 @@
|
||||
|
||||
#include "FDTD3dReference.h"
|
||||
|
||||
#include <cstdlib>
|
||||
#include <cmath>
|
||||
#include <iostream>
|
||||
#include <cstdlib>
|
||||
#include <iomanip>
|
||||
#include <iostream>
|
||||
#include <stdio.h>
|
||||
|
||||
void generateRandomData(float *data, const int dimx, const int dimy,
|
||||
const int dimz, const float lowerBound,
|
||||
const float upperBound) {
|
||||
srand(0);
|
||||
void generateRandomData(float *data,
|
||||
const int dimx,
|
||||
const int dimy,
|
||||
const int dimz,
|
||||
const float lowerBound,
|
||||
const float upperBound)
|
||||
{
|
||||
srand(0);
|
||||
|
||||
for (int iz = 0; iz < dimz; iz++) {
|
||||
for (int iy = 0; iy < dimy; iy++) {
|
||||
for (int ix = 0; ix < dimx; ix++) {
|
||||
*data = (float)(lowerBound +
|
||||
((float)rand() / (float)RAND_MAX) *
|
||||
(upperBound - lowerBound));
|
||||
++data;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void generatePatternData(float *data, const int dimx, const int dimy,
|
||||
const int dimz, const float lowerBound,
|
||||
const float upperBound) {
|
||||
for (int iz = 0; iz < dimz; iz++) {
|
||||
for (int iy = 0; iy < dimy; iy++) {
|
||||
for (int ix = 0; ix < dimx; ix++) {
|
||||
*data = (float)(lowerBound +
|
||||
((float)iz / (float)dimz) * (upperBound - lowerBound));
|
||||
++data;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bool fdtdReference(float *output, const float *input, const float *coeff,
|
||||
const int dimx, const int dimy, const int dimz,
|
||||
const int radius, const int timesteps) {
|
||||
const int outerDimx = dimx + 2 * radius;
|
||||
const int outerDimy = dimy + 2 * radius;
|
||||
const int outerDimz = dimz + 2 * radius;
|
||||
const size_t volumeSize = outerDimx * outerDimy * outerDimz;
|
||||
const int stride_y = outerDimx;
|
||||
const int stride_z = stride_y * outerDimy;
|
||||
float *intermediate = 0;
|
||||
const float *bufsrc = 0;
|
||||
float *bufdst = 0;
|
||||
float *bufdstnext = 0;
|
||||
|
||||
// Allocate temporary buffer
|
||||
printf(" calloc intermediate\n");
|
||||
intermediate = (float *)calloc(volumeSize, sizeof(float));
|
||||
|
||||
// Decide which buffer to use first (result should end up in output)
|
||||
if ((timesteps % 2) == 0) {
|
||||
bufsrc = input;
|
||||
bufdst = intermediate;
|
||||
bufdstnext = output;
|
||||
} else {
|
||||
bufsrc = input;
|
||||
bufdst = output;
|
||||
bufdstnext = intermediate;
|
||||
}
|
||||
|
||||
// Run the FDTD (naive method)
|
||||
printf(" Host FDTD loop\n");
|
||||
|
||||
for (int it = 0; it < timesteps; it++) {
|
||||
printf("\tt = %d\n", it);
|
||||
const float *src = bufsrc;
|
||||
float *dst = bufdst;
|
||||
|
||||
for (int iz = -radius; iz < dimz + radius; iz++) {
|
||||
for (int iy = -radius; iy < dimy + radius; iy++) {
|
||||
for (int ix = -radius; ix < dimx + radius; ix++) {
|
||||
if (ix >= 0 && ix < dimx && iy >= 0 && iy < dimy && iz >= 0 &&
|
||||
iz < dimz) {
|
||||
float value = (*src) * coeff[0];
|
||||
|
||||
for (int ir = 1; ir <= radius; ir++) {
|
||||
value += coeff[ir] * (*(src + ir) + *(src - ir)); // horizontal
|
||||
value += coeff[ir] * (*(src + ir * stride_y) +
|
||||
*(src - ir * stride_y)); // vertical
|
||||
value +=
|
||||
coeff[ir] * (*(src + ir * stride_z) +
|
||||
*(src - ir * stride_z)); // in front & behind
|
||||
for (int iz = 0; iz < dimz; iz++) {
|
||||
for (int iy = 0; iy < dimy; iy++) {
|
||||
for (int ix = 0; ix < dimx; ix++) {
|
||||
*data = (float)(lowerBound + ((float)rand() / (float)RAND_MAX) * (upperBound - lowerBound));
|
||||
++data;
|
||||
}
|
||||
|
||||
*dst = value;
|
||||
} else {
|
||||
*dst = *src;
|
||||
}
|
||||
|
||||
++dst;
|
||||
++src;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Rotate buffers
|
||||
float *tmp = bufdst;
|
||||
bufdst = bufdstnext;
|
||||
bufdstnext = tmp;
|
||||
bufsrc = (const float *)tmp;
|
||||
}
|
||||
|
||||
printf("\n");
|
||||
|
||||
if (intermediate) free(intermediate);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool compareData(const float *output, const float *reference, const int dimx,
|
||||
const int dimy, const int dimz, const int radius,
|
||||
const float tolerance) {
|
||||
for (int iz = -radius; iz < dimz + radius; iz++) {
|
||||
for (int iy = -radius; iy < dimy + radius; iy++) {
|
||||
for (int ix = -radius; ix < dimx + radius; ix++) {
|
||||
if (ix >= 0 && ix < dimx && iy >= 0 && iy < dimy && iz >= 0 &&
|
||||
iz < dimz) {
|
||||
// Determine the absolute difference
|
||||
float difference = fabs(*reference - *output);
|
||||
float error;
|
||||
void generatePatternData(float *data,
|
||||
const int dimx,
|
||||
const int dimy,
|
||||
const int dimz,
|
||||
const float lowerBound,
|
||||
const float upperBound)
|
||||
{
|
||||
for (int iz = 0; iz < dimz; iz++) {
|
||||
for (int iy = 0; iy < dimy; iy++) {
|
||||
for (int ix = 0; ix < dimx; ix++) {
|
||||
*data = (float)(lowerBound + ((float)iz / (float)dimz) * (upperBound - lowerBound));
|
||||
++data;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Determine the relative error
|
||||
if (*reference != 0)
|
||||
error = difference / *reference;
|
||||
else
|
||||
error = difference;
|
||||
bool fdtdReference(float *output,
|
||||
const float *input,
|
||||
const float *coeff,
|
||||
const int dimx,
|
||||
const int dimy,
|
||||
const int dimz,
|
||||
const int radius,
|
||||
const int timesteps)
|
||||
{
|
||||
const int outerDimx = dimx + 2 * radius;
|
||||
const int outerDimy = dimy + 2 * radius;
|
||||
const int outerDimz = dimz + 2 * radius;
|
||||
const size_t volumeSize = outerDimx * outerDimy * outerDimz;
|
||||
const int stride_y = outerDimx;
|
||||
const int stride_z = stride_y * outerDimy;
|
||||
float *intermediate = 0;
|
||||
const float *bufsrc = 0;
|
||||
float *bufdst = 0;
|
||||
float *bufdstnext = 0;
|
||||
|
||||
// Check the error is within the tolerance
|
||||
if (error > tolerance) {
|
||||
printf("Data error at point (%d,%d,%d)\t%f instead of %f\n", ix, iy,
|
||||
iz, *output, *reference);
|
||||
return false;
|
||||
}
|
||||
// Allocate temporary buffer
|
||||
printf(" calloc intermediate\n");
|
||||
intermediate = (float *)calloc(volumeSize, sizeof(float));
|
||||
|
||||
// Decide which buffer to use first (result should end up in output)
|
||||
if ((timesteps % 2) == 0) {
|
||||
bufsrc = input;
|
||||
bufdst = intermediate;
|
||||
bufdstnext = output;
|
||||
}
|
||||
else {
|
||||
bufsrc = input;
|
||||
bufdst = output;
|
||||
bufdstnext = intermediate;
|
||||
}
|
||||
|
||||
// Run the FDTD (naive method)
|
||||
printf(" Host FDTD loop\n");
|
||||
|
||||
for (int it = 0; it < timesteps; it++) {
|
||||
printf("\tt = %d\n", it);
|
||||
const float *src = bufsrc;
|
||||
float *dst = bufdst;
|
||||
|
||||
for (int iz = -radius; iz < dimz + radius; iz++) {
|
||||
for (int iy = -radius; iy < dimy + radius; iy++) {
|
||||
for (int ix = -radius; ix < dimx + radius; ix++) {
|
||||
if (ix >= 0 && ix < dimx && iy >= 0 && iy < dimy && iz >= 0 && iz < dimz) {
|
||||
float value = (*src) * coeff[0];
|
||||
|
||||
for (int ir = 1; ir <= radius; ir++) {
|
||||
value += coeff[ir] * (*(src + ir) + *(src - ir)); // horizontal
|
||||
value += coeff[ir] * (*(src + ir * stride_y) + *(src - ir * stride_y)); // vertical
|
||||
value += coeff[ir] * (*(src + ir * stride_z) + *(src - ir * stride_z)); // in front & behind
|
||||
}
|
||||
|
||||
*dst = value;
|
||||
}
|
||||
else {
|
||||
*dst = *src;
|
||||
}
|
||||
|
||||
++dst;
|
||||
++src;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
++output;
|
||||
++reference;
|
||||
}
|
||||
// Rotate buffers
|
||||
float *tmp = bufdst;
|
||||
bufdst = bufdstnext;
|
||||
bufdstnext = tmp;
|
||||
bufsrc = (const float *)tmp;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
printf("\n");
|
||||
|
||||
if (intermediate)
|
||||
free(intermediate);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool compareData(const float *output,
|
||||
const float *reference,
|
||||
const int dimx,
|
||||
const int dimy,
|
||||
const int dimz,
|
||||
const int radius,
|
||||
const float tolerance)
|
||||
{
|
||||
for (int iz = -radius; iz < dimz + radius; iz++) {
|
||||
for (int iy = -radius; iy < dimy + radius; iy++) {
|
||||
for (int ix = -radius; ix < dimx + radius; ix++) {
|
||||
if (ix >= 0 && ix < dimx && iy >= 0 && iy < dimy && iz >= 0 && iz < dimz) {
|
||||
// Determine the absolute difference
|
||||
float difference = fabs(*reference - *output);
|
||||
float error;
|
||||
|
||||
// Determine the relative error
|
||||
if (*reference != 0)
|
||||
error = difference / *reference;
|
||||
else
|
||||
error = difference;
|
||||
|
||||
// Check the error is within the tolerance
|
||||
if (error > tolerance) {
|
||||
printf("Data error at point (%d,%d,%d)\t%f instead of %f\n", ix, iy, iz, *output, *reference);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
++output;
|
||||
++reference;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user