cpu_backend.cpp - sphere - GPU-based 3D discrete element method algorithm with optional fluid coupling
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       cpu_backend.cpp (1216B)
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            1 // cpu_backend.cpp -- CPU-backend replacement for utility.cu plus the
            2 // definitions of the CUDA execution-model emulation globals.
            3 #include <iostream>
            4 #include <omp.h>
            5 
            6 #include "cpu_backend.h"
            7 #include "sphere.h"
            8 
            9 thread_local uint3 threadIdx;
           10 thread_local uint3 blockIdx;
           11 dim3 blockDim;
           12 dim3 gridDim;
           13 
           14 void DEM::diagnostics()
           15 {
           16     // Retrieve information from device to host and run diagnostic tests
           17     transferFromGlobalDeviceMemory();
           18     checkValues();
           19 
           20     // Clean up memory before exiting
           21     if (fluid == 1 && cfd_solver == 0) {
           22         freeNSmemDev();
           23         freeNSmem();
           24     }
           25     if (fluid == 1 && cfd_solver == 1) {
           26         freeDarcyMemDev();
           27         freeDarcyMem();
           28     }
           29     freeGlobalDeviceMemory();
           30     // CPU memory freed upon object destruction
           31 }
           32 
           33 // The CPU shims cannot fail asynchronously, so the checks are no-ops
           34 void DEM::checkForCudaErrors(const char*, const int) {}
           35 
           36 void DEM::checkForCudaErrorsIter(const char*, const unsigned int, const int) {}
           37 
           38 void DEM::initializeGPU()
           39 {
           40     ndevices = 1;
           41     if (verbose == 1)
           42         std::cout << "  CPU backend (OpenMP), max threads: "
           43             << omp_get_max_threads() << std::endl;
           44 }
           45 // vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4