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TgpuvtirtmadcigsRS.cu
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TgpuvtirtmadcigsRS.cu
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//a#########################################################
//a## 2D Acoustic VTI Medium RTM
//a## Ps : P + sv wave and get rid of sv
//a## GPU(CUDA) ,poynting adcigs
//a##
//a##/*a***************************
//a##Function for VTI medium modeling,2017.2.13
//a##
//a## Ps: the function of modeling following:
//a##
//a## du/dt=1/rho*dp/dx ,
//a## dw/dt=1/rho*dq/dz ,
//a## dp/dt=rho*vpx^2*du/dx+rho*vp*vpn*dw/dz ,
//a## dq/dt=rho*vp*vpn*du/dx+rho*vp^2*dw/dz ,
//a## vpx^2=vp^2*(1+2*epsilon);
//a## vpn^2=vp^2*(1+2*delta);
//a##*********a*******************/
//a##
//a## Rong Tao
//a## 2017.2.15
//a#########################################################
#include<stdio.h>
#include<malloc.h>
#include<math.h>
#include<stdlib.h>
#include <string.h>
#include <cuda_runtime.h>
#define pi 3.141592653
#define mm 4
//__constant__ float c[mm]={1.125,-0.04166667};/*mm==2*/
//__constant__ float c[mm]={1.1718750,-0.065104167,0.0046875};/*mm==3*/
__constant__ float c[mm]={1.196289,-0.0797526,0.009570313,-0.0006975447};/*mm==4*/
//__constant__ float c[mm]={1.211243,-0.08972168,0.01384277,-0.00176566,0.0001186795};/*mm==5*/
__device__ float d0;
//a################################################################################
void check_gpu_error (const char *msg)
/*< check GPU errors >*/
{
cudaError_t err = cudaGetLastError ();
if (cudaSuccess != err) {
printf("Cuda error: %s: %s\n", msg, cudaGetErrorString (err));
exit(0);
}
}
/*************func**************/
void laplace_filter(int adj, int nz, int nx, float *in, float *out)
/*< linear operator, come from Madagascar Mlaplac2>*/
{
int iz,ix,j;
for (j=0;j<nx*nz;j++) out[j]=0.0;
for (ix=0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
j = iz+ix*nz;
if (iz > 0) {
if (adj) {
out[j-1] -= in[j];
out[j] += in[j];
} else {
out[j] += in[j] - in[j-1];
}
}
if (iz < nz-1) {
if (adj) {
out[j+1] -= in[j];
out[j] += in[j];
} else {
out[j] += in[j] - in[j+1];
}
}
if (ix > 0) {
if (adj) {
out[j-nz] -= in[j];
out[j] += in[j];
} else {
out[j] += in[j] - in[j-nz];
}
}
if (ix < nx-1) {
if (adj) {
out[j+nz] -= in[j];
out[j] += in[j];
} else {
out[j] += in[j] - in[j+nz];
}
}
}
}
}
/*************func**************/
__global__ void add_source(float pfac,float xsn,float zsn,int nx,int nz,int nnx,int nnz,float dt,float t,
float favg,int wtype,int npml,int is,int ds,float *P,float *Q)
/*< generate ricker wavelet with time deley >*/
{
int ixs,izs;
float x_,xx_,tdelay,ts,source=0.0,fs;
tdelay=1.0/favg;
ts=t-tdelay;
fs=xsn+(is-1)*ds;
if(wtype==1)//ricker wavelet
{
x_=favg*ts;
xx_=x_*x_;
source=(1-2*pi*pi*(xx_))*exp(-(pi*pi*xx_));
}else if(wtype==2){//derivative of gaussian
x_=(-4)*favg*favg*pi*pi/log(0.1);
source=(-2)*pi*pi*ts*exp(-x_*ts*ts);
}else if(wtype==3){//derivative of gaussian
x_=(-1)*favg*favg*pi*pi/log(0.1);
source=exp(-x_*ts*ts);
}
if(t<=2*tdelay)
{
ixs = (int)(fs+0.5)+npml-1;
izs = (int)(zsn+0.5)+npml-1;
P[ixs*nnz+izs]+=pfac*source;
Q[ixs*nnz+izs]+=pfac*source;
}
}
/*******************func*********************/
__global__ void update_vel(int nx,int nz,int nnx,int nnz,int npml,float dt,float dx,float dz,
float *u0,float *w0,float *u1,float *w1,float *P,float *Q,
float *coffx1,float *coffx2,float *coffz1,float *coffz2)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
int ix,iz,im;
float dtx,dtz,xx,zz;
ix=id/nnz;
iz=id%nnz;
dtx=dt/dx;
dtz=dt/dz;
if(id>=mm&&id<nnx*nnz-mm)
{
if(ix>=mm&&ix<(nnx-mm)&&iz>=mm&&iz<(nnz-mm))
{
xx=0.0;
zz=0.0;
for(im=0;im<mm;im++)
{
xx+=c[im]*(P[id+(im+1)*nnz]-P[id-im*nnz]);
zz+=c[im]*(Q[id+im+1] -Q[id-im]);
}
u1[id]=coffx2[ix]*u0[id]-coffx1[ix]*dtx*xx;
w1[id]=coffz2[iz]*w0[id]-coffz1[iz]*dtz*zz;
}
}
}
/*******************func***********************/
__global__ void update_stress(int nx,int nz,int nnx,int nnz,float dt,float dx,float dz,
float *u1,float *w1,float *P,float *Q,float *vp,int npml,
float *px1,float *px0,float *pz1,float *pz0,float *qx1,float *qx0,float *qz1,float *qz0,
float *acoffx1,float *acoffx2,float *acoffz1,float *acoffz2,
float *delta,float *epsilon,int fs,int ds,int zs,int is,bool SV)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
int im,ix,iz,rx,rz,R=15,r=5;
float dtx,dtz, xx,zz,ee,dd;
ix=id/nnz;
iz=id%nnz;
dtx=dt/dx;
dtz=dt/dz;
if(id>=mm&&id<nnx*nnz-mm)
{
/************************i****************************************/
/************************iso circle start*************************/
rx=ix-(fs+(is-1)*ds+npml);
rz=iz-(zs+npml);
if(SV){
if((rx*rx+rz*rz)<=R*R){
if((rx*rx+rz*rz)<=r*r){
ee = 0.0;
dd = 0.0;
}else{
ee = 0.5*(1-cos(pi*((sqrtf(rx*rx+rz*rz)-r)*4.0/(R*3.0-1))))*epsilon[id];
dd = 0.5*(1-cos(pi*((sqrtf(rx*rx+rz*rz)-r)*4.0/(R*3.0-1))))*delta[id];
}
}else{
ee=epsilon[id];
dd=delta[id];
}
}else{
ee=epsilon[id];
dd=delta[id];
}
/************************ iso circle end *************************/
/************************i****************************************/
if(ix>=mm&&ix<(nnx-mm)&&iz>=mm&&iz<(nnz-mm))
{
xx=0.0;
zz=0.0;
for(im=0;im<mm;im++)
{
xx+=c[im]*(u1[id+im*nnz]-u1[id-(im+1)*nnz]);
zz+=c[im]*(w1[id+im] -w1[id-im-1]);
}
px1[id]=acoffx2[ix]*px0[id]-acoffx1[ix]*vp[id]*vp[id]*(1+2*ee)*dtx*xx;
pz1[id]=acoffz2[iz]*pz0[id]-acoffz1[iz]*vp[id]*vp[id]*sqrtf(1+2*dd)*dtz*zz;
qx1[id]=acoffx2[ix]*qx0[id]-acoffx1[ix]*vp[id]*vp[id]*sqrtf(1+2*dd)*dtx*xx;
qz1[id]=acoffz2[iz]*qz0[id]-acoffz1[iz]*vp[id]*vp[id]*dtz*zz;
P[id]=px1[id]+pz1[id];
Q[id]=qx1[id]+qz1[id];
}
}
}
/********************func**********************/
__global__ void get_d0(float dx,float dz,int nnx,int nnz,int npml,float *vp)
{
d0=10.0*vp[nnx*nnz/2]*log(100000.0)/(2.0*npml*((dx+dz)/2.0));
}
/*************func*******************/
void pad_vv(int nx,int nz,int nnx,int nnz,int npml,float *ee)
{
int ix,iz,id;
for(id=0;id<nnx*nnz;id++)
{
ix=id/nnz;
iz=id%nnz;
if(ix<npml){
ee[id]=ee[npml*nnz+iz]; //left
}else if(ix>=nnx-npml){
ee[id]=ee[(nnx-npml-1)*nnz+iz];//right
}
}
for(id=0;id<nnx*nnz;id++)
{
ix=id/nnz;
iz=id%nnz;
if(iz<npml){
ee[id]=ee[ix*nnz+npml];//up
}else if(iz>=nnz-npml){
ee[id]=ee[ix*nnz+nnz-npml-1];//down
}
}
}
/*************func*******************/
void read_file(char FN1[],char FN2[],char FN3[],int nx,int nz,int nnx,int nnz,float dx,float dz,float favg,float dt,
float *v,float *e,float *d,int npml)
{
int i,j,id;
float vmax, vmin, H_min, dt_max, dxz_max, C, tmp;
FILE *fp1,*fp2,*fp3;
if((fp1=fopen(FN1,"rb"))==NULL){printf("error open <%s>!\n",FN1);exit(0);}
if((fp2=fopen(FN2,"rb"))==NULL){printf("error open <%s>!\n",FN2);exit(0);}
if((fp3=fopen(FN3,"rb"))==NULL){printf("error open <%s>!\n",FN3);exit(0);}
vmin= 999999.9;
vmax=-999999.9;
for(i=npml;i<nx+npml;i++)
{
for(j=npml;j<nz+npml;j++)
{
id=i*nnz+j;
fread(&v[id],4L,1,fp1);
fread(&e[id],4L,1,fp2);
fread(&d[id],4L,1,fp3);
if(vmax<v[id]) vmax = v[id];
if(vmin>v[id]) vmin = v[id];
}
}
fclose(fp1);
fclose(fp2);
fclose(fp3);
printf("------------------------------------\n---\n");
printf("--- Vmax=%.2f, Vmin=%.2f\n",vmax,vmin);
/*********boundary*********/
pad_vv(nx,nz,nnx,nnz,npml,e);
pad_vv(nx,nz,nnx,nnz,npml,d);
pad_vv(nx,nz,nnx,nnz,npml,v);
H_min=dx<dz?dx:dz;
dt_max = 0.5*H_min/vmin;
dxz_max = vmax/favg*0.2;
if(dxz_max<dz||dxz_max<dx){printf("--- You need have to redefine DX and DZ ! \n");exit(0);}
if(dt_max<dt){printf("--- You need have to redefine DT ! \n");exit(0);}
if ( favg >= vmin/( 5.0*(dx>dz?dx:dz) ) || favg >= vmin/( 5.0*(dx>dz?dx:dz) ) )
{printf("--- Non-dispersion relation not satisfied! \n");exit(0);}
else if ( mm == 2 ) C = 0.857;
else if ( mm == 3 ) C = 0.8;
else if ( mm == 4 ) C = 0.777;
else if ( mm == 5 ) C = 0.759;
tmp = dt*vmax*sqrtf( 1.0/(dx*dx)+1.0/(dz*dz) );
if ( tmp >= C){ printf("--- Stability condition not satisfied! tmp = %f, C = %f\n",tmp,C);exit(0);}
}
/*************func*******************/
__global__ void initial_coffe(float dt,int nn,float *coff1,float *coff2,float *acoff1,float *acoff2,int npml)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
if(id<nn+2*npml)
{
if(id<npml)
{
coff1[id]=1.0/(1.0+(dt*d0*pow((npml-0.5-id)/npml,2.0))/2.0);
coff2[id]=coff1[id]*(1.0-(dt*d0*pow((npml-0.5-id)/npml,2.0))/2.0);
acoff1[id]=1.0/(1.0+(dt*d0*pow(((npml-id)*1.0)/npml,2.0))/2.0);
acoff2[id]=acoff1[id]*(1.0-(dt*d0*pow(((npml-id)*1.0)/npml,2.0))/2.0);
}else if(id>=npml&&id<npml+nn){
coff1[id]=1.0;
coff2[id]=1.0;
acoff1[id]=1.0;
acoff2[id]=1.0;
}else{
coff1[id]=1.0/(1.0+(dt*d0*pow((0.5+id-nn-npml)/npml,2.0))/2.0);
coff2[id]=coff1[id]*(1.0-(dt*d0*pow((0.5+id-nn-npml)/npml,2.0))/2.0);
acoff1[id]=1.0/(1.0+(dt*d0*pow(((id-nn-npml)*1.0)/npml,2.0))/2.0);
acoff2[id]=acoff1[id]*(1.0-(dt*d0*pow(((id-nn-npml)*1.0)/npml,2.0))/2.0);
}
}
}
/*************func*******************/
__global__ void shot_record(int nnx, int nnz, int nx, int nz, int npml, int it, int nt, float *P, float *shot, bool flag)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
if(id<nx)
{
if(flag){
shot[it+nt*id]=P[npml+nnz*(id+npml)];
}else{
P[npml+nnz*(id+npml)]=shot[it+nt*id];
}
}
}
/*************func*******************/
__global__ void wavefield_bndr(int nnx, int nnz, int nx, int nz, int npml, int it, int nt,
float *P, float *Q, float *P_bndr, float *Q_bndr, bool flag)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
if(id<2*nx+2*nz)
{
if(flag)/////////////////////////////////save boundary
{
if(id<nx){//up
P_bndr[it*(2*nx+2*nz)+id]=P[npml-1+nnz*(id+npml)];
Q_bndr[it*(2*nx+2*nz)+id]=Q[npml-1+nnz*(id+npml)];
}else if(id>=nx&&id<(2*nx)){//down
P_bndr[it*(2*nx+2*nz)+id]=P[npml+nz+1+nnz*(id-nx+npml)];
Q_bndr[it*(2*nx+2*nz)+id]=Q[npml+nz+1+nnz*(id-nx+npml)];
}else if(id>=(2*nx)&&id<(2*nx+nz)){//left
P_bndr[it*(2*nx+2*nz)+id]=P[id-2*nx+npml+nnz*(npml-1)];
Q_bndr[it*(2*nx+2*nz)+id]=Q[id-2*nx+npml+nnz*(npml-1)];
}else if(id>=(2*nx+nz)){//right
P_bndr[it*(2*nx+2*nz)+id]=P[id-2*nx-nz+npml+nnz*(npml+nx+1)];
Q_bndr[it*(2*nx+2*nz)+id]=Q[id-2*nx-nz+npml+nnz*(npml+nx+1)];
}
}else{/////////////////////////////add boundary
if(id<nx){//up
P[npml-1+nnz*(id+npml)]=P_bndr[it*(2*nx+2*nz)+id];
Q[npml-1+nnz*(id+npml)]=Q_bndr[it*(2*nx+2*nz)+id];
}else if(id>=nx&&id<(2*nx)){//down
P[npml+nz+1+nnz*(id-nx+npml)]=P_bndr[it*(2*nx+2*nz)+id];
Q[npml+nz+1+nnz*(id-nx+npml)]=Q_bndr[it*(2*nx+2*nz)+id];
}else if(id>=(2*nx)&&id<(2*nx+nz)){//left
P[id-2*nx+npml+nnz*(npml-1)]=P_bndr[it*(2*nx+2*nz)+id];
Q[id-2*nx+npml+nnz*(npml-1)]=Q_bndr[it*(2*nx+2*nz)+id];
}else if(id>=(2*nx+nz)){//right
P[id-2*nx-nz+npml+nnz*(npml+nx+1)]=P_bndr[it*(2*nx+2*nz)+id];
Q[id-2*nx-nz+npml+nnz*(npml+nx+1)]=Q_bndr[it*(2*nx+2*nz)+id];
}
}
}
}
/*************func**************/
__global__ void mute_directwave(int nx,int nt,float dt,float favg,
float dx,float dz,int fs,int ds,int zs,int is,
float *vp,float *epsilon,float *shot,int tt)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
int mu_t,mu_nt;
float mu_x,mu_z,mu_t0;
int ix=id/nt;
int it=id%nt;
if(id<nx*nt)
{
mu_x=dx*abs(ix-fs-(is-1)*ds);
mu_z=dz*zs;
mu_t0=sqrtf(pow(mu_x,2)+pow(mu_z,2))/(vp[1]*sqrtf(1+2*epsilon[1]));
mu_t=(int)(2.0/(dt*favg));
mu_nt=(int)(mu_t0/dt)+mu_t+tt;
if((it>(int)(mu_t0/dt)-tt)&&(it<mu_nt))
shot[id]=0.0;
}
}/*************func**************/
__global__ void cal_illumination(int nnx, int nnz, int nz, int npml, float *illumination, float *P, float *Q)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
int ix=id/nz;
int iz=id%nz;
if(id<nnx*nnz)
{
illumination[id]+=P[iz+npml+nnz*(ix+npml)]*P[iz+npml+nnz*(ix+npml)]
+Q[iz+npml+nnz*(ix+npml)]*Q[iz+npml+nnz*(ix+npml)];
if(illumination[id]==0)illumination[id]=1.0;
}
}
/*************func**************/
__global__ void cal_migration(int nnx, int nnz, int nz, int npml, float *migration, float *s, float *g)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
int ix=id/nz;
int iz=id%nz;
if(id<nnx*nnz)
{
migration[id]+=s[iz+npml+nnz*(ix+npml)]*g[iz+npml+nnz*(ix+npml)];
}
}
/*************func**************/
__global__ void migration_illum(int nx, int nz, int npml, float *migration, float *illumination)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
if(id<nx*nz)
{
migration[id]/=illumination[id];//*illumination[id];
}
}
/*************func**************/
__global__ void Poynting_Adcigs(int nnz, int nx, int nz, int npml, int na, int da, int dcdp, float *adcigs,
float *s_P, float *s_Q, float *s_u, float *s_w,
float *g_P, float *g_Q, float *g_u, float *g_w)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
int ix=id/nz*dcdp;
int iz=id%nz;
int ia=0;
float Ssx=-s_P[iz+npml+nnz*(ix+npml)]*s_u[iz+npml+nnz*(ix+npml)];
float Ssz=-s_Q[iz+npml+nnz*(ix+npml)]*s_w[iz+npml+nnz*(ix+npml)];
float Sgx= g_P[iz+npml+nnz*(ix+npml)]*g_u[iz+npml+nnz*(ix+npml)];
float Sgz= g_Q[iz+npml+nnz*(ix+npml)]*g_w[iz+npml+nnz*(ix+npml)];
float b1= Ssx*Ssx + Ssz*Ssz;
float b2= Sgx*Sgx + Sgz*Sgz;
float a=(Ssx*Sgx + Ssz*Sgz)/(sqrtf(b1*b2)*(1 - 0.1));
if(id<nx/dcdp*nz)
{
if(a>=-1&&a<=1)
{
a=0.5*acosf(a)*180.0/pi;
ia=(int)(a/(da*1.0));
if(ia<na)
{
adcigs[iz+nz*ia+nz*na*(id/nz)] += s_P[iz+npml+nnz*(ix+npml)]*g_P[iz+npml+nnz*(ix+npml)]
*cosf(ia*pi/180.0)*cosf(ia*pi/180.0)*cosf(ia*pi/180.0);
}
}
}
}
/*************func**************/
__global__ void adcigs_illum(int nx, int nz, int na, int da, int dcdp, float *adcigs, float *illumination)
{
int id=threadIdx.x+blockDim.x*blockIdx.x;
int ix=id/(nz*na)*dcdp;
int iz=id%nz;
if(id<nx*nz/dcdp*na)
{
adcigs[id]/=illumination[iz+nz*ix];//*illumination[iz+nz*ix];
}
}
//a########################################################################
//a## Main Function ##
//a########################################################################
int main(int argc,char *argv[])
{
int is, it, nx, nz, nnx, nnz, nt, wtype, na, da, dcdp, nxa;
int ns, ds, fs, zs, npml;
float dx, dz, dt, t, pfac, favg;
float *coffx1,*coffx2,*coffz1,*coffz2,*acoffx1,*acoffx2,*acoffz1,*acoffz2;
float *v, *e, *d;
float *vp, *epsilon, *delta;
float *s_u0, *s_u1, *s_px0, *s_qx0, *s_px1, *s_qx1;
float *s_w0, *s_w1, *s_pz0, *s_qz0, *s_pz1, *s_qz1;
float *g_u0, *g_u1, *g_px0, *g_qx0, *g_px1, *g_qx1;
float *g_w0, *g_w1, *g_pz0, *g_qz0, *g_pz1, *g_qz1;
float *s_P, *s_Q, *g_P, *g_Q, *shot_Dev, *shot_Hos, *P_bndr, *Q_bndr;
float *migration, *illumination, *adcigs;
float *Atemp;
bool read;
clock_t start, end;
/*************wavelet\boundary**************/
wtype=1;npml=20;
/********** dat document ***********/
char FN1[250]={"layer_vel_601_301.dat"};
char FN2[250]={"layer_epsilon_601_301.dat"};
char FN3[250]={"layer_delta_601_301.dat"};
char FN4[250]={"layer_shot_obs.dat"};
char FN5[250]={"layer_shot_cal.dat"};
char FN6[250]={"layer_snap.dat"};
char FN7[250]={"layer_migration.dat"};
char FN8[250]={"layer_illumination.dat"};
char FN9[250]={"layer_adcigs.dat"};
/********* parameters *************/
read=true;/* true: read shot;
flase: use right shot record */
/********* parameters *************/
nx=601;
nz=301; favg=30; pfac=10.0;
dx=5.0;
dz=5.0;
nt=3001;
dt=0.0005;
ns=100;
fs=nx/ns/2;
ds=nx/ns;
zs=1;
na=65;
da=1;
dcdp=1;
/********aaa************/
FILE *fpsnap, *fpobs, *fpcal, *fpmig, *fpillum, *fpadcigs;
if((fpobs=fopen(FN4,"rb"))==NULL){printf("error open <%s>!\n",FN4);exit(0);}
fpcal=fopen(FN5,"wb");
fpsnap=fopen(FN6,"wb");
fpmig=fopen(FN7,"wb");
fpillum=fopen(FN8,"wb");
fpadcigs=fopen(FN9,"wb");
/*************v***************/
nnx=nx+2*npml;
nnz=nz+2*npml;
nxa=(int)(nx/dcdp);
/************a*************/
Atemp=(float*)malloc(nz*nx/dcdp*na*sizeof(float));
v=(float*)malloc(nnz*nnx*sizeof(float));
e=(float*)malloc(nnz*nnx*sizeof(float));
d=(float*)malloc(nnz*nnx*sizeof(float));
shot_Hos=(float*)malloc(nt*nx*sizeof(float));
read_file(FN1,FN2,FN3,nx,nz,nnx,nnz,dx,dz,favg,dt,v,e,d,npml);
/****************************/
cudaSetDevice(0);// initialize device, default device=0;
check_gpu_error("Failed to initialize device!");
/****************************/
cudaMalloc(&vp, nnz*nnx*sizeof(float));
cudaMalloc(&epsilon, nnz*nnx*sizeof(float));
cudaMalloc(&delta, nnz*nnx*sizeof(float));
cudaMemcpy(vp, v, nnz*nnx*sizeof(float), cudaMemcpyHostToDevice);
cudaMemcpy(epsilon, e, nnz*nnx*sizeof(float), cudaMemcpyHostToDevice);
cudaMemcpy(delta, d, nnz*nnx*sizeof(float), cudaMemcpyHostToDevice);
/****************************/
cudaMalloc(&s_u0, nnz*nnx*sizeof(float)); cudaMalloc(&s_u1, nnz*nnx*sizeof(float));
cudaMalloc(&s_w0, nnz*nnx*sizeof(float)); cudaMalloc(&s_w1, nnz*nnx*sizeof(float));
cudaMalloc(&s_P, nnz*nnx*sizeof(float)); cudaMalloc(&s_Q, nnz*nnx*sizeof(float));
cudaMalloc(&s_px0, nnz*nnx*sizeof(float)); cudaMalloc(&s_px1, nnz*nnx*sizeof(float));
cudaMalloc(&s_pz0, nnz*nnx*sizeof(float)); cudaMalloc(&s_pz1, nnz*nnx*sizeof(float));
cudaMalloc(&s_qx0, nnz*nnx*sizeof(float)); cudaMalloc(&s_qx1, nnz*nnx*sizeof(float));
cudaMalloc(&s_qz0, nnz*nnx*sizeof(float)); cudaMalloc(&s_qz1, nnz*nnx*sizeof(float));
cudaMalloc(&g_u0, nnz*nnx*sizeof(float)); cudaMalloc(&g_u1, nnz*nnx*sizeof(float));
cudaMalloc(&g_w0, nnz*nnx*sizeof(float)); cudaMalloc(&g_w1, nnz*nnx*sizeof(float));
cudaMalloc(&g_P, nnz*nnx*sizeof(float)); cudaMalloc(&g_Q, nnz*nnx*sizeof(float));
cudaMalloc(&g_px0, nnz*nnx*sizeof(float)); cudaMalloc(&g_px1, nnz*nnx*sizeof(float));
cudaMalloc(&g_pz0, nnz*nnx*sizeof(float)); cudaMalloc(&g_pz1, nnz*nnx*sizeof(float));
cudaMalloc(&g_qx0, nnz*nnx*sizeof(float)); cudaMalloc(&g_qx1, nnz*nnx*sizeof(float));
cudaMalloc(&g_qz0, nnz*nnx*sizeof(float)); cudaMalloc(&g_qz1, nnz*nnx*sizeof(float));
cudaMalloc(&coffx1, nnx*sizeof(float)); cudaMalloc(&coffx2, nnx*sizeof(float));
cudaMalloc(&coffz1, nnz*sizeof(float)); cudaMalloc(&coffz2, nnz*sizeof(float));
cudaMalloc(&acoffx1, nnx*sizeof(float)); cudaMalloc(&acoffx2, nnx*sizeof(float));
cudaMalloc(&acoffz1, nnz*sizeof(float)); cudaMalloc(&acoffz2, nnz*sizeof(float));
cudaMalloc(&shot_Dev, nx*nt*sizeof(float));
cudaMalloc(&P_bndr, nt*(2*nx+2*nz)*sizeof(float));
cudaMalloc(&Q_bndr, nt*(2*nx+2*nz)*sizeof(float));
cudaMalloc(&migration, nz*nx*sizeof(float));
cudaMalloc(&illumination, nz*nx*sizeof(float));
cudaMalloc(&adcigs, nz*na*nxa*sizeof(float));
/******************************/
check_gpu_error("Failed to allocate memory for variables!");
get_d0<<<1, 1>>>(dx, dz, nnx, nnz, npml, vp);
initial_coffe<<<(nnx+511)/512, 512>>>(dt,nx,coffx1,coffx2,acoffx1,acoffx2,npml);
initial_coffe<<<(nnz+511)/512, 512>>>(dt,nz,coffz1,coffz2,acoffz1,acoffz2,npml);
cudaMemset(migration, 0, nz*nx*sizeof(float));
cudaMemset(illumination, 0, nz*nx*sizeof(float));
cudaMemset(adcigs, 0, nz*na*nxa*sizeof(float));
printf("--------------------------------------------------------\n");
printf("---");
start = clock();
/**********IS Loop start*******/
for(is=1;is<=ns;is++)
{
printf("\n--- IS=%3d ",is);
cudaMemset(s_u0, 0, nnz*nnx*sizeof(float)); cudaMemset(s_u1, 0, nnz*nnx*sizeof(float));
cudaMemset(s_w0, 0, nnz*nnx*sizeof(float)); cudaMemset(s_w1, 0, nnz*nnx*sizeof(float));
cudaMemset(s_P, 0, nnz*nnx*sizeof(float)); cudaMemset(s_Q, 0, nnz*nnx*sizeof(float));
cudaMemset(s_px0, 0, nnz*nnx*sizeof(float)); cudaMemset(s_px1, 0, nnz*nnx*sizeof(float));
cudaMemset(s_pz0, 0, nnz*nnx*sizeof(float)); cudaMemset(s_pz1, 0, nnz*nnx*sizeof(float));
cudaMemset(s_qx0, 0, nnz*nnx*sizeof(float)); cudaMemset(s_qx1, 0, nnz*nnx*sizeof(float));
cudaMemset(s_qz0, 0, nnz*nnx*sizeof(float)); cudaMemset(s_qz1, 0, nnz*nnx*sizeof(float));
cudaMemset(g_u0, 0, nnz*nnx*sizeof(float)); cudaMemset(g_u1, 0, nnz*nnx*sizeof(float));
cudaMemset(g_w0, 0, nnz*nnx*sizeof(float)); cudaMemset(g_w1, 0, nnz*nnx*sizeof(float));
cudaMemset(g_P, 0, nnz*nnx*sizeof(float)); cudaMemset(g_Q, 0, nnz*nnx*sizeof(float));
cudaMemset(g_px0, 0, nnz*nnx*sizeof(float)); cudaMemset(g_px1, 0, nnz*nnx*sizeof(float));
cudaMemset(g_pz0, 0, nnz*nnx*sizeof(float)); cudaMemset(g_pz1, 0, nnz*nnx*sizeof(float));
cudaMemset(g_qx0, 0, nnz*nnx*sizeof(float)); cudaMemset(g_qx1, 0, nnz*nnx*sizeof(float));
cudaMemset(g_qz0, 0, nnz*nnx*sizeof(float)); cudaMemset(g_qz1, 0, nnz*nnx*sizeof(float));
cudaMemset(shot_Dev, 0, nt*nx*sizeof(float));
cudaMemset(P_bndr, 0, nt*(2*nx+2*nz)*sizeof(float));
cudaMemset(Q_bndr, 0, nt*(2*nx+2*nz)*sizeof(float));
/*a***********************************Forward*******************************************/
for(it=0,t=dt;it<nt;it++,t+=dt)
{
//if(it==0)printf(" > F >",is,it);
/*a#####################a*/
/*a## Forward ##a*/
/*a#####################a*/
add_source<<<1,1>>>(pfac,fs,zs,nx,nz,nnx,nnz,dt,t,favg,wtype,npml,is,ds,s_P,s_Q);
update_vel<<<(nnx*nnz+511)/512, 512>>>(nx,nz,nnx,nnz,npml,dt,dx,dz,
s_u0,s_w0,s_u1,s_w1,s_P,s_Q,coffx1,coffx2,coffz1,coffz2);
update_stress<<<(nnx*nnz+511)/512, 512>>>(nx,nz,nnx,nnz,dt,dx,dz,s_u1,s_w1,s_P,s_Q,vp,npml,
s_px1,s_px0,s_pz1,s_pz0,s_qx1,s_qx0,s_qz1,s_qz0,
acoffx1,acoffx2,acoffz1,acoffz2,delta,epsilon,fs,ds,zs,is,true);
s_u0=s_u1; s_w0=s_w1; s_px0=s_px1; s_pz0=s_pz1; s_qx0=s_qx1; s_qz0=s_qz1;
shot_record<<<(nx+511)/512, 512>>>(nnx, nnz, nx, nz, npml, it, nt, s_P, shot_Dev, true);
wavefield_bndr<<<((2*nx+2*nz)+511)/512,512>>>(nnx, nnz, nx, nz, npml, it, nt, s_P, s_Q, P_bndr, Q_bndr, true);
cal_illumination<<<(nx*nz+511)/512, 512>>>(nnx, nnz, nz, npml, illumination, s_P, s_Q);
if((is==1)&&(it%300==0))
{
cudaMemcpy(e, s_P, nnz*nnx*sizeof(float), cudaMemcpyDeviceToHost);
fwrite(e,4L,nnx*nnz,fpsnap);
}
}//it loop end
mute_directwave<<<(nx*nt+511)/512, 512>>>(nx,nt,dt,favg,dx,dz,fs,ds,zs,is,vp,epsilon,shot_Dev,20);
cudaMemcpy(shot_Hos, shot_Dev, nt*nx*sizeof(float), cudaMemcpyDeviceToHost);
fseek(fpcal,(is-1)*nt*nx*sizeof(float),0);
fwrite(shot_Hos,sizeof(float),nt*nx,fpcal);
if(read){
fseek(fpobs,(is-1)*nt*nx*sizeof(float),0);
fread(shot_Hos,sizeof(float),nt*nx,fpobs);
cudaMemcpy(shot_Dev, shot_Hos, nt*nx*sizeof(float), cudaMemcpyHostToDevice);
}
/*a***********************************Backward*******************************************/
for(it=nt-1;it>=0;it--)
{
// if(it==0)printf(" B ",is,it);
/*a#####################a*/
/*a## Reconstruction ##a*/
/*a#####################a*/
wavefield_bndr<<<((2*nx+2*nz)+511)/512,512>>>(nnx, nnz, nx, nz, npml, it, nt, s_P, s_Q, P_bndr, Q_bndr, false);
update_vel<<<(nnx*nnz+511)/512, 512>>>(nx,nz,nnx,nnz,npml,dt,dx,dz,
s_u0,s_w0,s_u1,s_w1,s_P,s_Q,coffx1,coffx2,coffz1,coffz2);
update_stress<<<(nnx*nnz+511)/512, 512>>>(nx,nz,nnx,nnz,dt,dx,dz,s_u1,s_w1,s_P,s_Q,vp,npml,
s_px1,s_px0,s_pz1,s_pz0,s_qx1,s_qx0,s_qz1,s_qz0,
acoffx1,acoffx2,acoffz1,acoffz2,delta,epsilon,fs,ds,zs,is,false);
s_u0=s_u1; s_w0=s_w1; s_px0=s_px1; s_pz0=s_pz1; s_qx0=s_qx1; s_qz0=s_qz1;
/* if((is==1)&&(it%300==0))
{
cudaMemcpy(e, s_P, nnz*nnx*sizeof(float), cudaMemcpyDeviceToHost);
fwrite(e,4L,nnx*nnz,fpsnap);
}*/
/*a#####################a*/
/*a## Backward ##a*/
/*a#####################a*/
shot_record<<<(nx+511)/512, 512>>>(nnx, nnz, nx, nz, npml, it, nt, g_P, shot_Dev, false);
shot_record<<<(nx+511)/512, 512>>>(nnx, nnz, nx, nz, npml, it, nt, g_Q, shot_Dev, false);
update_vel<<<(nnx*nnz+511)/512, 512>>>(nx,nz,nnx,nnz,npml,dt,dx,dz,
g_u0,g_w0,g_u1,g_w1,g_P,g_Q,coffx1,coffx2,coffz1,coffz2);
update_stress<<<(nnx*nnz+511)/512, 512>>>(nx,nz,nnx,nnz,dt,dx,dz,g_u1,g_w1,g_P,g_Q,vp,npml,
g_px1,g_px0,g_pz1,g_pz0,g_qx1,g_qx0,g_qz1,g_qz0,
acoffx1,acoffx2,acoffz1,acoffz2,delta,epsilon,fs,ds,zs,is,false);
g_u0=g_u1; g_w0=g_w1; g_px0=g_px1; g_pz0=g_pz1; g_qx0=g_qx1; g_qz0=g_qz1;
/* if((is==1)&&(it%300==0))
{
cudaMemcpy(e, g_P, nnz*nnx*sizeof(float), cudaMemcpyDeviceToHost);
fwrite(e,4L,nnx*nnz,fpsnap);
}*/
cal_migration<<<(nx*nz+511)/512, 512>>>(nnx, nnz, nz, npml, migration, s_P, g_P);
Poynting_Adcigs<<<(nxa*nz+511)/512, 512>>>(nnz, nx, nz, npml, na, da, dcdp, adcigs,
s_P, s_Q, s_u0, s_w0, g_P, g_Q, g_u0, g_w0);
}//it loop end
}//is loop end
migration_illum<<<(nx*nz+511)/512, 512>>>(nx, nz, npml, migration, illumination);
adcigs_illum<<<(nxa*nz*na+511)/512, 512>>>(nx, nz, na, da, dcdp, adcigs, illumination);
cudaMemcpy(e, migration, nz*nx*sizeof(float), cudaMemcpyDeviceToHost);
laplace_filter(1,nz,nx,e,d);
fwrite(d,sizeof(float),nx*nz,fpmig);
cudaMemcpy(e, illumination, nz*nx*sizeof(float), cudaMemcpyDeviceToHost);
fwrite(e,sizeof(float),nx*nz,fpillum);
cudaMemcpy(Atemp, adcigs, nz*nxa*na*sizeof(float), cudaMemcpyDeviceToHost);
fwrite(Atemp,sizeof(float),nz*nxa*na,fpadcigs);
end = clock();
/*********IS Loop end*********/
printf("\n--- Complete!!!!!!!!! \n");
printf("total %d shots: %f (min)\n", ns, ((float)(end-start))/60.0/CLOCKS_PER_SEC);
/***********close************/
fclose(fpsnap); fclose(fpobs); fclose(fpmig);
fclose(fpillum); fclose(fpadcigs);
/***********free*************/
cudaFree(coffx1); cudaFree(coffx2);
cudaFree(coffz1); cudaFree(coffz2);
cudaFree(acoffx1); cudaFree(acoffx2);
cudaFree(acoffz1); cudaFree(acoffz2);
cudaFree(s_u0); cudaFree(s_u1);
cudaFree(s_w0); cudaFree(s_w1);
cudaFree(s_P); cudaFree(s_Q);
cudaFree(s_px0); cudaFree(s_px1);
cudaFree(s_pz0); cudaFree(s_pz1);
cudaFree(s_qx0); cudaFree(s_qx1);
cudaFree(s_qz0); cudaFree(s_qz1);
cudaFree(g_u0); cudaFree(g_u1);
cudaFree(g_w0); cudaFree(g_w1);
cudaFree(g_P); cudaFree(g_Q);
cudaFree(g_px0); cudaFree(g_px1);
cudaFree(g_pz0); cudaFree(g_pz1);
cudaFree(g_qx0); cudaFree(g_qx1);
cudaFree(g_qz0); cudaFree(g_qz1);
cudaFree(shot_Dev);
cudaFree(P_bndr); cudaFree(Q_bndr);
cudaFree(migration);
cudaFree(illumination);
cudaFree(adcigs);
/***************host free*****************/
free(v); free(e); free(d);
free(shot_Hos); free(Atemp);
}