103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
/* ----------------------------------------------------------------------
|
|
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
|
|
http://lammps.sandia.gov, Sandia National Laboratories
|
|
Steve Plimpton, sjplimp@sandia.gov
|
|
|
|
Copyright (2003) 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.
|
|
|
|
See the README file in the top-level LAMMPS directory.
|
|
------------------------------------------------------------------------- */
|
|
|
|
/* ----------------------------------------------------------------------
|
|
Contributing authors: Mike Brown (ORNL), brownw@ornl.gov
|
|
------------------------------------------------------------------------- */
|
|
|
|
#include <iostream>
|
|
#include <cassert>
|
|
#include <math.h>
|
|
|
|
#include "pppm_gpu_memory.h"
|
|
|
|
using namespace std;
|
|
|
|
static PPPMGPUMemory<PRECISION,ACC_PRECISION> PPPMF;
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Allocate memory on host and device and copy constants to device
|
|
// ---------------------------------------------------------------------------
|
|
bool pppm_gpu_init(const int nlocal, const int nall, FILE *screen,
|
|
const int order, const int nxlo_out, const int nylo_out,
|
|
const int nzlo_out, const int nxhi_out, const int nyhi_out,
|
|
const int nzhi_out, double **rho_coeff) {
|
|
PPPMF.clear();
|
|
int first_gpu=PPPMF.device->first_device();
|
|
int last_gpu=PPPMF.device->last_device();
|
|
int world_me=PPPMF.device->world_me();
|
|
int gpu_rank=PPPMF.device->gpu_rank();
|
|
int procs_per_gpu=PPPMF.device->procs_per_gpu();
|
|
|
|
PPPMF.device->init_message(screen,"pppm",first_gpu,last_gpu);
|
|
|
|
bool message=false;
|
|
if (PPPMF.device->replica_me()==0 && screen)
|
|
message=true;
|
|
|
|
if (message) {
|
|
fprintf(screen,"Initializing GPU and compiling on process 0...");
|
|
fflush(screen);
|
|
}
|
|
|
|
if (world_me==0) {
|
|
bool init_ok=PPPMF.init(nlocal,nall,screen,order,nxlo_out,nylo_out,
|
|
nzlo_out,nxhi_out,nyhi_out,nzhi_out,rho_coeff);
|
|
if (!init_ok)
|
|
return false;
|
|
}
|
|
|
|
PPPMF.device->world_barrier();
|
|
if (message)
|
|
fprintf(screen,"Done.\n");
|
|
|
|
for (int i=0; i<procs_per_gpu; i++) {
|
|
if (message) {
|
|
if (last_gpu-first_gpu==0)
|
|
fprintf(screen,"Initializing GPU %d on core %d...",first_gpu,i);
|
|
else
|
|
fprintf(screen,"Initializing GPUs %d-%d on core %d...",first_gpu,
|
|
last_gpu,i);
|
|
fflush(screen);
|
|
}
|
|
if (gpu_rank==i && world_me!=0) {
|
|
bool init_ok=PPPMF.init(nlocal,nall,screen,order,nxlo_out,nylo_out,
|
|
nzlo_out,nxhi_out,nyhi_out,nzhi_out,rho_coeff);
|
|
if (!init_ok)
|
|
return false;
|
|
}
|
|
PPPMF.device->gpu_barrier();
|
|
if (message)
|
|
fprintf(screen,"Done.\n");
|
|
}
|
|
if (message)
|
|
fprintf(screen,"\n");
|
|
return true;
|
|
}
|
|
|
|
void pppm_gpu_clear() {
|
|
PPPMF.clear();
|
|
}
|
|
|
|
void pppm_gpu_compute(const int ago, const int nlocal, const int nall,
|
|
double **host_x, int *host_type, bool &success,
|
|
double *host_q, double *boxlo, const double delxinv,
|
|
const double delyinv, const double delzinv) {
|
|
PPPMF.compute(ago,nlocal,nall,host_x,host_type,success,host_q,boxlo,delxinv,
|
|
delyinv,delzinv);
|
|
}
|
|
|
|
double pppm_gpu_bytes() {
|
|
return PPPMF.host_memory_usage();
|
|
}
|