path: root/testpar/perf.c

/* 
 * Author: Albert Cheng of NCSA, May 1, 2001.
 * This is derived from code given to me by Robert Ross. 
 *
 * NOTE: This code assumes that all command line arguments make it out to all
 * the processes that make up the parallel job, which isn't always the case.
 * So if it doesn't work on some platform, that might be why.
 */

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/time.h>
#include <mpi.h>
#include "mpio.h"

#include "hdf5.h"
/* Macro definitions */
/* Verify:
 * if val is false (0), print mesg and if fatal is true (non-zero), die.
 */
#define H5FATAL 1
#define VRFY(val, mesg, fatal) do {                                            \
    if (!val) {                                                                \
	printf("Proc %d: ", mynod);					       \
        printf("*** Assertion failed (%s) at line %4d in %s\n",                \
	    mesg, (int)__LINE__, __FILE__);     			       \
	if (fatal){							       \
	    fflush(stdout);						       \
	    goto die_jar_jar_die;					       \
	}								       \
    }                                                                          \
} while(0)
#define RANK 1
hsize_t dims[RANK];   	/* dataset dim sizes */
hsize_t block[RANK], stride[RANK], count[RANK];
hssize_t start[RANK];
hid_t fid;                  /* HDF5 file ID */
hid_t acc_tpl;		/* File access templates */
hid_t sid;   		/* Dataspace ID */
hid_t file_dataspace;	/* File dataspace ID */
hid_t mem_dataspace;	/* memory dataspace ID */
hid_t dataset;		/* Dataset ID */
hsize_t opt_alignment	= 1;
hsize_t opt_threshold	= 1;


/* DEFAULT VALUES FOR OPTIONS */
int64_t opt_block     = 1048576*16;
int     opt_iter      = 1;
int     opt_stripe    = -1;
int     opt_correct   = 0;
int     amode         = O_RDWR | O_CREAT;
char    opt_file[256] = "/foo/test.out\0";
char    opt_pvfstab[256] = "notset\0";
int     opt_pvfstab_set = 0;

/* function prototypes */
int parse_args(int argc, char **argv);
double Wtime(void);

extern int errno;
extern int debug_on;

/* globals needed for getopt */
extern char *optarg;
extern int optind, opterr;

int main(int argc, char **argv)
{
	char *buf, *tmp, *buf2, *tmp2, *check;
	int i, j, mynod=0, nprocs=1, err, my_correct = 1, correct, myerrno;
	double stim, etim;
	double write_tim = 0;
	double read_tim = 0;
	double read_bw, write_bw;
	double max_read_tim, max_write_tim;
	double min_read_tim, min_write_tim;
	double ave_read_tim, ave_write_tim;
	int64_t iter_jump = 0;
	int64_t seek_position = 0;
	MPI_File fh;
	MPI_Status status;
	int nchars;
    herr_t ret;         	/* Generic return value */

	/* startup MPI and determine the rank of this process */
	MPI_Init(&argc,&argv);
	MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
	MPI_Comm_rank(MPI_COMM_WORLD, &mynod);

	/* parse the command line arguments */
	parse_args(argc, argv);

	if (mynod == 0) printf("# Using hdf5-io calls.\n");

	
	/* kindof a weird hack- if the location of the pvfstab file was 
	 * specified on the command line, then spit out this location into
	 * the appropriate environment variable: */
	
#if H5_HAVE_SETENV
/* no setenv or unsetenv */
	if (opt_pvfstab_set) {
		if((setenv("PVFSTAB_FILE", opt_pvfstab, 1)) < 0){
			perror("setenv");
			goto die_jar_jar_die;
		}
	}
#endif
	
	/* this is how much of the file data is covered on each iteration of
	 * the test.  used to help determine the seek offset on each
	 * iteration */
	iter_jump = nprocs * opt_block;
		
	/* setup a buffer of data to write */
	if (!(tmp = (char *) malloc(opt_block + 256))) {
		perror("malloc");
		goto die_jar_jar_die;
	}
	buf = tmp + 128 - (((long)tmp) % 128);  /* align buffer */

	if (opt_correct) {
		/* do the same buffer setup for verifiable data */
		if (!(tmp2 = (char *) malloc(opt_block + 256))) {
			perror("malloc2");
			goto die_jar_jar_die;
		 }
		buf2 = tmp + 128 - (((long)tmp) % 128);
	}

    /* setup file access template with parallel IO access. */
    acc_tpl = H5Pcreate (H5P_FILE_ACCESS);
    VRFY((acc_tpl >= 0), "H5Pcreate access succeeded", H5FATAL);
    ret = H5Pset_fapl_mpio(acc_tpl, MPI_COMM_WORLD, MPI_INFO_NULL);
    VRFY((ret >= 0), "H5Pset_fapl_mpio succeeded", H5FATAL);
    /* set optional allocation alignment */
    if (opt_alignment*opt_threshold != 1){
	ret = H5Pset_alignment(acc_tpl, opt_threshold, opt_alignment );
	VRFY((ret >= 0), "H5Pset_alignment succeeded", !H5FATAL);
    }

    /* create the parallel file */
    fid=H5Fcreate(opt_file,H5F_ACC_TRUNC,H5P_DEFAULT,acc_tpl);
    VRFY((fid >= 0), "H5Fcreate succeeded", H5FATAL);

    /* define a contiquous dataset of opt_iter*nprocs*opt_block chars */
    dims[0] = opt_iter*nprocs*opt_block;
    sid = H5Screate_simple (RANK, dims, NULL);
    VRFY((sid >= 0), "H5Screate_simple succeeded", H5FATAL);
    dataset = H5Dcreate(fid, "Dataset1", H5T_NATIVE_CHAR, sid,
			H5P_DEFAULT);
    VRFY((dataset >= 0), "H5Dcreate succeeded", H5FATAL);

    /* create the memory dataspace and the file dataspace */
    dims[0] = opt_block;
    mem_dataspace = H5Screate_simple (RANK, dims, NULL);
    VRFY((mem_dataspace >= 0), "", H5FATAL);
    file_dataspace = H5Dget_space (dataset);
    VRFY((file_dataspace >= 0), "H5Dget_space succeeded", H5FATAL);

	/* now each process writes a block of opt_block chars in round robbin
	 * fashion until the whole dataset is covered.
	 */
	for (j=0; j < opt_iter; j++) {
	    /* setup a file dataspace selection */
	    start[0] = (j*iter_jump)+(mynod*opt_block);
	    stride[0] = block[0] = opt_block;
	    count[0]= 1;
	    ret=H5Sselect_hyperslab(file_dataspace, H5S_SELECT_SET, start, stride, count, block); 
	    VRFY((ret >= 0), "H5Sset_hyperslab succeeded", H5FATAL);

		if (opt_correct) /* fill in buffer for iteration */ {
			for (i=mynod+j, check=buf; i<opt_block; i++,check++) *check=(char)i;
		}

		/* discover the starting time of the operation */
	   MPI_Barrier(MPI_COMM_WORLD);
	   stim = MPI_Wtime();

    /* write data */
    ret = H5Dwrite(dataset, H5T_NATIVE_CHAR, mem_dataspace, file_dataspace,
	    H5P_DEFAULT, buf);					    
    VRFY((ret >= 0), "H5Dwrite dataset1 succeeded", !H5FATAL);

		/* discover the ending time of the operation */
	   etim = MPI_Wtime();

	   write_tim += (etim - stim);
		
		/* we are done with this "write" iteration */
	}

    /* close dataset and file */					    
    ret=H5Dclose(dataset);
    VRFY((ret >= 0), "H5Dclose succeeded", H5FATAL);
    ret=H5Fclose(fid);							    
    VRFY((ret >= 0), "H5Fclose succeeded", H5FATAL);



	/* wait for everyone to synchronize at this point */
	MPI_Barrier(MPI_COMM_WORLD);

    /* reopen the file for reading */
    fid=H5Fopen(opt_file,H5F_ACC_RDONLY,acc_tpl);
    VRFY((fid >= 0), "", H5FATAL);

    /* open the dataset */
    dataset = H5Dopen(fid, "Dataset1");
    VRFY((dataset >= 0), "H5Dopen succeeded", H5FATAL);

    /* we can re-use the same mem_dataspace and file_dataspace
     * the H5Dwrite used since the dimension size is the same.
     */

	/* we are going to repeat the read the same pattern the write used */
	for (j=0; j < opt_iter; j++) {
	    /* setup a file dataspace selection */
	    start[0] = (j*iter_jump)+(mynod*opt_block);
	    stride[0] = block[0] = opt_block;
	    count[0]= 1;
	    ret=H5Sselect_hyperslab(file_dataspace, H5S_SELECT_SET, start, stride, count, block); 
	    VRFY((ret >= 0), "H5Sset_hyperslab succeeded", H5FATAL);
		/* seek to the appropriate spot give the current iteration and
		 * rank within the MPI processes */

		/* discover the start time */
	   MPI_Barrier(MPI_COMM_WORLD);
	   stim = MPI_Wtime();

    /* read data */
		/* read in the file data */
		if (!opt_correct){
    ret = H5Dread(dataset, H5T_NATIVE_CHAR, mem_dataspace, file_dataspace,
	    H5P_DEFAULT, buf);					    
		}
		else{
    ret = H5Dread(dataset, H5T_NATIVE_CHAR, mem_dataspace, file_dataspace,
	    H5P_DEFAULT, buf2);					    
		}
		myerrno = errno;
		/* discover the end time */
	   etim = MPI_Wtime();
	   read_tim += (etim - stim);
    VRFY((ret >= 0), "H5Dwrite dataset1 succeeded", !H5FATAL);


	   if (ret < 0) fprintf(stderr, "node %d, read error, loc = %Ld: %s\n",
			mynod, mynod*opt_block, strerror(myerrno));

		/* if the user wanted to check correctness, compare the write
		 * buffer to the read buffer */
		if (opt_correct && memcmp(buf, buf2, opt_block)) {
			fprintf(stderr, "node %d, correctness test failed\n", mynod);
			my_correct = 0;
			MPI_Allreduce(&my_correct, &correct, 1, MPI_INT, MPI_MIN,
				MPI_COMM_WORLD);
		}

		/* we are done with this read iteration */
	}

    /* close dataset and file */					    
    ret=H5Dclose(dataset);
    VRFY((ret >= 0), "H5Dclose succeeded", H5FATAL);
    ret=H5Fclose(fid);							    
    VRFY((ret >= 0), "H5Fclose succeeded", H5FATAL);

	/* compute the read and write times */
	MPI_Allreduce(&read_tim, &max_read_tim, 1, MPI_DOUBLE, MPI_MAX,
		MPI_COMM_WORLD);
	MPI_Allreduce(&read_tim, &min_read_tim, 1, MPI_DOUBLE, MPI_MIN,
		MPI_COMM_WORLD);
	MPI_Allreduce(&read_tim, &ave_read_tim, 1, MPI_DOUBLE, MPI_SUM,
		MPI_COMM_WORLD);

	/* calculate the average from the sum */
	ave_read_tim = ave_read_tim / nprocs; 

	MPI_Allreduce(&write_tim, &max_write_tim, 1, MPI_DOUBLE, MPI_MAX,
		MPI_COMM_WORLD);
	MPI_Allreduce(&write_tim, &min_write_tim, 1, MPI_DOUBLE, MPI_MIN,
		MPI_COMM_WORLD);
	MPI_Allreduce(&write_tim, &ave_write_tim, 1, MPI_DOUBLE, MPI_SUM,
		MPI_COMM_WORLD);

	/* calculate the average from the sum */
	ave_write_tim = ave_write_tim / nprocs; 
	
	/* print out the results on one node */
	if (mynod == 0) {
	   read_bw = ((int64_t)(opt_block*nprocs*opt_iter))/(max_read_tim*1000000.0);
	   write_bw = ((int64_t)(opt_block*nprocs*opt_iter))/(max_write_tim*1000000.0);
		
			printf("nr_procs = %d, nr_iter = %d, blk_sz = %ld\n", nprocs,
		opt_iter, (long)opt_block);
			
			printf("# total_size = %ld\n", (long)(opt_block*nprocs*opt_iter));
			
			printf("# Write:  min_time = %f, max_time = %f, mean_time = %f\n", 
				min_write_tim, max_write_tim, ave_write_tim);
			printf("# Read:  min_time = %f, max_time = %f, mean_time = %f\n", 
				min_read_tim, max_read_tim, ave_read_tim);
		
	   printf("Write bandwidth = %f Mbytes/sec\n", write_bw);
	   printf("Read bandwidth = %f Mbytes/sec\n", read_bw);
		
		if (opt_correct) {
			printf("Correctness test %s.\n", correct ? "passed" : "failed");
		}
	}


die_jar_jar_die:	

#if H5_HAVE_SETENV
/* no setenv or unsetenv */
	/* clear the environment variable if it was set earlier */
	if	(opt_pvfstab_set){
		unsetenv("PVFSTAB_FILE");
	}
#endif
	
	free(tmp);
	if (opt_correct) free(tmp2);
	MPI_Finalize();
	return(0);
}

int parse_args(int argc, char **argv)
{
	int c;
	
	while ((c = getopt(argc, argv, "s:b:i:f:p:a:c")) != EOF) {
		switch (c) {
			case 's': /* stripe */
				opt_stripe = atoi(optarg);
				break;
			case 'b': /* block size */
				opt_block = atoi(optarg);
				break;
			case 'i': /* iterations */
				opt_iter = atoi(optarg);
				break;
			case 'f': /* filename */
				strncpy(opt_file, optarg, 255);
				break;
			case 'p': /* pvfstab file */
				strncpy(opt_pvfstab, optarg, 255);
				opt_pvfstab_set = 1;
				break;
			case 'a': /* aligned allocation.
				   * syntax: -a<alignment>/<threshold>
				   * e.g., -a4096/512  allocate at 4096 bytes
				   * boundary if request size >= 512.
				   */
				{char *p;
				opt_alignment = atoi(optarg);
				if (p=(char*)strchr(optarg, '/'))
				    opt_threshold = atoi(p+1);
				}
				printf("alignment/threshold=%ld/%ld\n",
				     opt_alignment, opt_threshold);
				break;
			case 'c': /* correctness */
				opt_correct = 1;
				break;
			case '?': /* unknown */
			default:
				break;
		}
	}
	return(0);
}

/* Wtime() - returns current time in sec., in a double */
double Wtime()
{
	struct timeval t;
	
	gettimeofday(&t, NULL);
	return((double)t.tv_sec + (double)t.tv_usec / 1000000);
}

/*
 * Local variables:
 *  c-indent-level: 3
 *  c-basic-offset: 3
 *  tab-width: 3
 * End:
 */