120 lines
3.0 KiB
C++
Executable File
120 lines
3.0 KiB
C++
Executable File
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <hdf5.h>
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#include "H5Part.hh"
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/*
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A simple regression test that shows how you use this API
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to write and read multi-timestep files of particle data.
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*/
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#ifdef PARALLEL_IO
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int main(int argc,char *argv[]){
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int N = 10;
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int sz=0;
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double *x,*y,*z;
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h5part_int64_t *id;
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H5PartFile *file;
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int i,t,nt,nds;
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int nprocs,myproc;
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unsigned int np = 0;
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MPI_Comm comm=MPI_COMM_WORLD;
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MPI_Init(&argc,&argv);
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MPI_Comm_size(comm,&nprocs);
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MPI_Comm_rank(comm,&myproc);
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/* parallel file creation */
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file=H5PartOpenFileParallel("parttest.h5",H5PART_WRITE,comm);
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if(!file) {
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perror("File open failed: exiting!");
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exit(0);
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}
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for(t=0;t<5;t++){
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MPI_Barrier(comm);
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sz = myproc*N;
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// proc[0] sz = 10, (next step N=10), sz=10
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// proc[1] sz = 20, (next step N=20), sz=40
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fprintf(stderr,"proc[%u] sz=%u\n",myproc,(unsigned)sz);
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x =(double*)malloc(1+sz*sizeof(double));
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y =(double*)malloc(1+sz*sizeof(double));
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z =(double*)malloc(1+sz*sizeof(double));
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id=(h5part_int64_t*)malloc(1+sz*sizeof(h5part_int64_t));
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for(i=0;i<sz;i++) {
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x[i]=(double)(i+t)+10.0*(double)myproc;
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y[i]=0.1 + (double)(i+t);
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z[i]=0.2 + (double)(i+t*10);
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id[i]=i+sz*myproc;
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}
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fprintf(stderr,"Proc[%u] Writing timestep %u Np=%u\n",myproc,t,sz);
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H5PartSetStep(file,t); /* must set the current timestep in file */
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fprintf(stderr,"Proc[%u]: setNumParticles start\n",myproc);
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H5PartSetNumParticles(file,sz); /* then set number of particles to store */
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fprintf(stderr,"Proc[%u]: setNumParticles done\n",myproc);
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/* now write different tuples of data into this timestep of the file */
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fprintf(stderr,"Proc[%u]: WriteX start\n",myproc);
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H5PartWriteDataFloat64(file,"x",x);
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fprintf(stderr,"Proc[%u]: WriteX done\n",myproc);
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H5PartWriteDataFloat64(file,"y",y);
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H5PartWriteDataFloat64(file,"z",z);
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H5PartWriteDataFloat64(file,"px",x);
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H5PartWriteDataFloat64(file,"py",y);
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H5PartWriteDataFloat64(file,"pz",z);
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H5PartWriteDataInt64(file,"id",id);
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if(x)
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free(x);
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if(y)
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free(y);
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if(z)
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free(z);
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if(id)
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free(id);
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// remove the next line and everything is ok
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N = 1 + sz;
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}
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printf("AllDone p[%u]\n",myproc);
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H5PartCloseFile(file);
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MPI_Barrier(comm);
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unsigned int idStart = 0;
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unsigned int idEnd = myproc*10;
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printf("p[%u:%u] : OK, close file and reopen for reading idStart %u idEnd %u \n",myproc,nprocs,idStart,idEnd);
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file=H5PartOpenFileParallel("parttest.h5",H5PART_READ,comm);
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H5PartSetStep(file,0);
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nt = H5PartGetNumSteps(file); /* get number of steps in file */
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nds=H5PartGetNumDatasets(file); /* get number of datasets in timestep 0 */
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MPI_Barrier(comm);
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H5PartSetView(file,idStart,idEnd);
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np = H5PartGetNumParticles(file);
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printf("steps= %u datasets= %u particles= %u\n",nt,nds,np);
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H5PartCloseFile(file);
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MPI_Barrier(comm);
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fprintf(stderr,"proc[%u]: done\n",myproc);
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return MPI_Finalize();
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}
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#endif
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