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#include <stdio.h>
#include <unistd.h>
#include <math.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include "mp3.h"
#include "armci.h"
extern int na;
extern int nz;
extern double *dmvec,*svec,*bvec,*dvec,*amat,*xvec,*axvec,*rvec,*qvec;
extern int *ridx,*cidx;
extern int me, nproc;
extern int myfirstrow,mylastrow;
static int *columnmap,*allfirstrow,*alllastrow;
static FILE *fd;
void generate_random_file(int naa,int nnz){
fd = fopen("randominput.dat", "w");
}
void read_and_create(int argc, char **argv)
{
int ri,i,nread;
int tmp1,idealelementsperproc;
void **amatptrs,**xvecptrs;
na = atoi(argv[1]);
nz = atoi(argv[2]);
if(strncmp("random",argv[3],6)){
if(me==0){
fd = fopen(argv[3], "r");
if(fd==NULL)ARMCI_Error("unable to open given file",0);
}
}
else{
if(na==0 || nz==0){
printf("\nERROR:exiting-no input file given and na or nz is 0");
fflush(stdout);
ARMCI_Finalize();
MP_FINALIZE();
return;
}
if(me==0){
generate_random_file(na,nz);
fd = fopen("randominput.dat", "r");
}
}
if(me==0){
if(na==0)
nread = fread(&na, sizeof(na), 1, fd);
if(nz==0)
nread = fread(&nz, sizeof(nz), 1, fd);
printf("\nReading CG input\n");
printf("Number of rows: %d\n", na);
printf("Number of non-zeros: %d\n", nz);
}
armci_msg_bcast(&nz,sizeof(int),0);
armci_msg_bcast(&na,sizeof(int),0);
MP_BARRIER();
amatptrs = (void **)malloc(sizeof(void *)*nproc);
xvecptrs = (void **)malloc(sizeof(void *)*nproc);
if(xvecptrs==NULL || amatptrs==NULL)
ARMCI_Error("xvecptrs amatptrs malloc failed",sizeof(void *)*nproc);
if(ARMCI_Malloc(amatptrs,((me==0)?(sizeof(double)*nz):0)))
ARMCI_Error("amat malloc failed",sizeof(double)*nz);
amat = (double *)amatptrs[0];
if(ARMCI_Malloc(amatptrs,((me==0)?(sizeof(int)*(nz+1)):0)))
ARMCI_Error("icol malloc failed",sizeof(int)*(nz+1));
cidx = (int *)amatptrs[0];
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(int)*(na+1)):0)); /*+1 for end of last row*/
ridx = (int *)xvecptrs[0];
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(double)*(na+1)):0));
xvec = (double *)xvecptrs[0];
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(double)*(na+1)):0));
bvec = (double *)xvecptrs[0];
if(me==0){
for (i = 0; i < na + 1; i++)
xvec[i] = 0.0;
nread = fread(amat, sizeof(double), nz, fd);
nread = fread(ridx, sizeof(int), (na+1), fd);
ridx[na]=nz;
nread = fread(cidx, sizeof(int), (nz+1), fd);
nread = fread(bvec, sizeof(double), (na+1), fd);
/* the c adjustment */
for (i = 0; i < na; i++)
ridx[i] -= 1;
for (i = 0; i < nz; i++)
cidx[i] -= 1;
}
MP_BARRIER();
/*acg_matvecmul(amat,xvec,bvec,ridx,cidx);*/
if(0){
for(i=0;i<nz+1;i++)
printf("\n%d:amat[%d]=%f icol[%d]=%d",me,i,amat[i],i,cidx[i]);
for(i=0;i<na+1;i++)
printf("\n%d:irow[%d]=%d bvec[%d]=%f",me,i,ridx[i],i,bvec[i]);
}
allfirstrow = (int *)malloc(sizeof(int)*nproc);
alllastrow = (int *)malloc(sizeof(int)*nproc);
columnmap = (int *)malloc(sizeof(int)*nproc);
if(!allfirstrow || !alllastrow || !columnmap)
ARMCI_Error("malloc failed allfirstrow ",0);
MP_BARRIER();
/*
* next decide who works on which rows, this will decide the
* distribution of a,d,r,q,x,and ax
*/
/*create the mapping for all vectors, row matrix and column matrix*/
if(me==0){
idealelementsperproc = nz/nproc;
tmp1=0;
for(i=0;i<nproc;i++){
int elementsperproc=0;
allfirstrow[i]=tmp1;
for(ri=tmp1;ri<na;ri++,tmp1++){
elementsperproc+=(ridx[ri+1]-ridx[ri]);
if(elementsperproc>=idealelementsperproc){
if((elementsperproc-idealelementsperproc) >
idealelementsperproc-(elementsperproc-(ridx[ri+1]-ridx[ri]))){
alllastrow[i] = ri-1;
if((ri-1)<0)ARMCI_Error("run on a smaller processor count",0);
/*tmp1--;*/
}
else{
alllastrow[i] = ri;
if(ri<0)ARMCI_Error("run on a smaller processor count",0);
tmp1++;
}
elementsperproc=0;
break;
}
}
}
alllastrow[nproc-1]=na-1;
for(i=0;i<nproc;i++)columnmap[i]=ridx[allfirstrow[i]];
}
armci_msg_bcast(columnmap,nproc*sizeof(int),0);
armci_msg_bcast(allfirstrow,nproc*sizeof(int),0);
armci_msg_bcast(alllastrow,nproc*sizeof(int),0);
myfirstrow = allfirstrow[me];
mylastrow = alllastrow[me];
if(me==0)for(i=0;i<nproc;i++){
printf("\nDISTRIBUTION:first row of process\t%d is %d last row of process\t%d is %d",i,allfirstrow[i],i,alllastrow[i]);
}
/*
for(i=myfirstrow;i<mylastrow;i++){
xvec[i]=0.0;
}
*/
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(double)*na):0));
rvec = (double *)xvecptrs[0];
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(double)*na):0));
dvec = (double *)xvecptrs[0];
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(double)*na):0));
svec = (double *)xvecptrs[0];
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(double)*na):0));
dmvec = (double *)xvecptrs[0];
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(double)*na):0));
qvec = (double *)xvecptrs[0];
ARMCI_Malloc(xvecptrs,((me==0)?(sizeof(double)*na):0));
axvec = (double *)xvecptrs[0];
if(me==0)fclose(fd);
/*dont forget to free mallocs*/
free(allfirstrow);
free(alllastrow);
free(columnmap);
}
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