jianmu
/
lammps
forked from lijiext/lammps
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

New MPI algorithm (still to be checked)

This commit is contained in:
julient31 2017-11-28 13:52:08 -07:00
parent f1182df776
commit 49f0a7a89a
3 changed files with 120 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
examples/SPIN/in.co_magnetomech
View File

@ -8,6 +8,8 @@ dimension 3
boundary p p p
#boundary f f f
#newton off
#setting atom_style to spin:
atom_style spin
@ -21,7 +23,7 @@ atom_modify map array
###########################
lattice fcc 3.54
region box block 0.0 8.0 0.0 8.0 0.0 8.0
region box block 0.0 5.0 0.0 5.0 0.0 5.0
create_box 1 box
create_atoms 1 box
@ -36,21 +38,19 @@ group single_spin id 10
mass 1 58.93
#Setting spins orientation and moment
#set group all spin/random 31 1.72
set group all spin 1.72 0.0 0.0 1.0
set group single_spin spin/random 11 1.72
set group all spin/random 31 1.72
#set group all spin 1.72 0.0 0.0 1.0
#set group single_spin spin/random 11 1.72
velocity all create 200 4928459 rot yes dist gaussian
#Magneto-mechanic interactions for bulk fcc Cobalt
#pair_style pair/spin/exchange 4.0
#pair_style eam/alloy
#pair_style hybrid/overlay eam/alloy pair/spin/soc 4.0
#pair_style hybrid/overlay eam/alloy pair/spin/exchange 4.0 pair/spin/soc/neel 4.0
#pair_style hybrid/overlay eam/alloy pair/spin/exchange 6.5
pair_style hybrid/overlay eam/alloy pair/spin/exchange 4.0
pair_coeff * * eam/alloy ../Co_PurjaPun_2012.eam.alloy Co
pair_coeff * * eam/alloy ../examples/SPIN/Co_PurjaPun_2012.eam.alloy Co
#pair_coeff * * ../Co_PurjaPun_2012.eam.alloy Co
#pair_style pair/spin 4.0
@ -114,6 +114,6 @@ thermo_modify format float %20.15g
dump 1 all custom 500 dump_VSRSV.lammpstrj type x y z spx spy spz
#Running the simulations for N timesteps
#run 100
run 10000
#run 2

124
src/SPIN/fix_integration_spin.cpp
View File

@ -109,6 +109,7 @@ FixIntegrationSpin::~FixIntegrationSpin()
memory->destroy(spj);
memory->destroy(fmi);
memory->destroy(fmj);
}
/* ---------------------------------------------------------------------- */
@ -190,6 +191,7 @@ void FixIntegrationSpin::init()
if (locklangevinspin->temp_flag == 1) temp_flag = 1;
}
// perform the sectoring if mpi integration
if (mpi_flag) sectoring();
@ -200,7 +202,6 @@ void FixIntegrationSpin::init()
void FixIntegrationSpin::initial_integrate(int vflag)
{
double dtfm,msq,scale,fm2,fmsq,sp2,spsq,energy;
double cp[3],g[3];
double **x = atom->x;
double **v = atom->v;
@ -226,8 +227,72 @@ void FixIntegrationSpin::initial_integrate(int vflag)
}
}
#define MPI_TEST
//#define SEC
#define LIST
#if defined LIST
//printf("sectors = %d \n",nsectors);
int adv_list[nsectors][nlocal];
int k[nsectors];
for (int j = 0; j < nsectors; j++) {
k[j] = 0;
for (int i = 0; i < nlocal; i++) {
adv_list[j][i] = 0;
}
}
int s, p;
// update half s for all particles
if (extra == SPIN) {
if (mpi_flag == 1) { // mpi seq. update
int nseci;
for (int j = 0; j < nsectors; j++) { // advance quarter s for nlocal
comm->forward_comm();
k[j] = 0;
for (int i = 0; i < nlocal; i++) {
xi[0] = x[i][0];
xi[1] = x[i][1];
xi[2] = x[i][2];
nseci = coords2sector(xi);
if (j != nseci) continue;
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
adv_list[j][k[j]] = i;
k[j]++;
}
}
int ntest = 0;
for (int j = 0; j < nsectors; j++) {
ntest += k[j];
}
if (ntest != nlocal) error->all(FLERR,"error, S(k[j]) != nlocal");
for (int j = nsectors-1; j >= 0; j--) {
comm->forward_comm();
for (int i = k[j]-1; i >= 0; i--) {
p = adv_list[j][i];
ComputeInteractionsSpin(p);
AdvanceSingleSpin(p,dts,sp,fm);
}
}
} else if (mpi_flag == 0) { // serial seq. update
comm->forward_comm(); // comm. positions of ghost atoms
for (int i = 0; i < nlocal-1; i++){ // advance quarter s for nlocal
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
}
ComputeInteractionsSpin(nlocal-1);
AdvanceSingleSpin(nlocal-1,2.0*dts,sp,fm); // advance half s for 1
for (int i = nlocal-2; i >= 0; i--){ // advance quarter s for nlocal
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
}
} else error->all(FLERR,"Illegal fix integration/spin command");
}
#endif
#if defined SEC
// update half s for all particles
if (extra == SPIN) {
if (mpi_flag == 1) { // mpi seq. update
@ -243,9 +308,6 @@ void FixIntegrationSpin::initial_integrate(int vflag)
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
}
#if defined MPI_TEST
MPI_Barrier(world);
#endif
}
for (int j = nsectors-1; j >= 0; j--) { // advance quarter s for nlocal
comm->forward_comm();
@ -258,9 +320,6 @@ void FixIntegrationSpin::initial_integrate(int vflag)
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
}
#if defined MPI_TEST
MPI_Barrier(world);
#endif
}
} else if (mpi_flag == 0) { // serial seq. update
comm->forward_comm(); // comm. positions of ghost atoms
@ -276,6 +335,8 @@ void FixIntegrationSpin::initial_integrate(int vflag)
}
} else error->all(FLERR,"Illegal fix integration/spin command");
}
#endif
// update x for all particles
for (int i = 0; i < nlocal; i++) {
@ -286,6 +347,45 @@ void FixIntegrationSpin::initial_integrate(int vflag)
}
}
#if defined LIST
// update half s for all particles
if (extra == SPIN) {
if (mpi_flag == 1) { // mpi seq. update
int nseci;
for (int j = 0; j < nsectors; j++) { // advance quarter s for nlocal
comm->forward_comm();
for (int i = 0; i < k[j]; i++) {
p = adv_list[j][i];
ComputeInteractionsSpin(p);
AdvanceSingleSpin(p,dts,sp,fm);
}
}
for (int j = nsectors-1; j >= 0; j--) { // advance quarter s for nlocal
comm->forward_comm();
for (int i = k[j]-1; i >= 0; i--) {
p = adv_list[j][i];
ComputeInteractionsSpin(p);
AdvanceSingleSpin(p,dts,sp,fm);
}
}
} else if (mpi_flag == 0) { // serial seq. update
comm->forward_comm(); // comm. positions of ghost atoms
for (int i = 0; i < nlocal-1; i++){ // advance quarter s for nlocal
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
}
ComputeInteractionsSpin(nlocal-1);
AdvanceSingleSpin(nlocal-1,2.0*dts,sp,fm); // advance half s for 1
for (int i = nlocal-2; i >= 0; i--){ // advance quarter s for nlocal
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
}
} else error->all(FLERR,"Illegal fix integration/spin command");
}
#endif
#if defined SEC
// update half s for all particles
if (extra == SPIN) {
if (mpi_flag == 1) { // mpi seq. update
@ -301,9 +401,6 @@ void FixIntegrationSpin::initial_integrate(int vflag)
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
}
#if defined MPI_TEST
MPI_Barrier(world);
#endif
}
for (int j = nsectors-1; j >= 0; j--) { // advance quarter s for nlocal
comm->forward_comm();
@ -316,9 +413,6 @@ void FixIntegrationSpin::initial_integrate(int vflag)
ComputeInteractionsSpin(i);
AdvanceSingleSpin(i,dts,sp,fm);
}
#if defined MPI_TEST
MPI_Barrier(world);
#endif
}
} else if (mpi_flag == 0) { // serial seq. update
comm->forward_comm(); // comm. positions of ghost atoms
@ -334,7 +428,7 @@ void FixIntegrationSpin::initial_integrate(int vflag)
}
} else error->all(FLERR,"Illegal fix integration/spin command");
}
#endif
}

6
src/SPIN/pair_spin_exchange.cpp
View File

@ -175,9 +175,9 @@ void PairSpinExchange::compute(int eflag, int vflag)
f[j][0] += fj[0];
f[j][1] += fj[1];
f[j][2] += fj[2];
fm[j][0] += fmj[0];
fm[j][1] += fmj[1];
fm[j][2] += fmj[2];
//fm[j][0] += fmj[0];
//fm[j][1] += fmj[1];
//fm[j][2] += fmj[2];
}
if (eflag) {