netmpi.c

刚才是说明 现在是安装程序在 LINUX环境下进行编程的MPICH安装文件

#ifdef HAVE_WINDOWS_H
#include <winsock2.h>
#include <windows.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include "mpi.h"
#include "GetOpt.h"
#include <string.h>

#define  TRIALS 	7
#define  REPEAT 	1000
int 	 g_NSAMP =	250;
#define  PERT		3
/*#define  LATENCYREPS	1000*/
int      g_LATENCYREPS = 1000;
#define  LONGTIME	1e99
#define  CHARSIZE	8
#define  PATIENCE	50
#define  RUNTM		0.25
double	 g_STOPTM = 	0.1;
#define  MAXINT 	2147483647

#define ABS(x)		(((x) < 0)?(-(x)):(x))
#define MIN(x, y)	(((x) < (y))?(x):(y))
#define MAX(x, y)	(((x) > (y))?(x):(y))

int g_nIproc = 0, g_nNproc = 0;

typedef struct protocolstruct ProtocolStruct;
struct protocolstruct
{
    int nbor, iproc;
};

typedef struct argstruct ArgStruct;
struct argstruct 
{
    /* This is the common information that is needed for all tests		*/
    char    *host;	/* Name of receiving host				*/
    char    *buff;	/* Transmitted buffer					*/
    char    *buff1;	/* Transmitted buffer					*/
    int     bufflen,	/* Length of transmitted buffer 			*/
	    tr, 	/* Transmit flag 					*/
	    nbuff;	/* Number of buffers to transmit 			*/
    
    /* Now we work with a union of information for protocol dependent stuff	*/
    ProtocolStruct prot;	/* Structure holding necessary info for TCP 	*/
};

typedef struct data Data;
struct data
{
    double t;
    double bps;
    double variance;
    int    bits;
    int    repeat;
};

double When(void);
int Setup(ArgStruct *p);
void Sync(ArgStruct *p);
void SendData(ArgStruct *p);
void RecvData(ArgStruct *p);
void SendRecvData(ArgStruct *p);
void SendTime(ArgStruct *p, double *t, int *rpt);
void RecvTime(ArgStruct *p, double *t, int *rpt);
int Establish(ArgStruct *p);
int  CleanUp(ArgStruct *p);
double TestLatency(ArgStruct *p);
double TestSyncTime(ArgStruct *p);
void PrintOptions(void);
int DetermineLatencyReps(ArgStruct *p);

void PrintOptions()
{
    printf("\n");
    printf("Usage: netpipe flags\n");
    printf(" flags:\n");
    printf("       -reps #iterations\n");
    printf("       -time stop_time\n");
    printf("       -start initial_msg_size\n");
    printf("       -end final_msg_size\n");
    printf("       -out outputfile\n");
    printf("       -nocache\n");
    printf("       -headtohead\n");
    printf("       -pert\n");
    printf("       -noprint\n");
    printf("Requires exactly two processes\n");
    printf("\n");
}

int main(int argc, char *argv[])
{
    FILE *out=0;		/* Output data file 				*/
    char s[255]; 		/* Generic string				*/
    char *memtmp;
    char *memtmp1;
    
    int i, j, n, nq,		/* Loop indices					*/
	bufoffset = 0,		/* Align buffer to this				*/
	bufalign = 16*1024,	/* Boundary to align buffer to			*/
	nrepeat,		/* Number of time to do the transmission	*/
	nzero = 0,
	len,			/* Number of bytes to be transmitted		*/
	inc = 1,		/* Increment value				*/
	detailflag = 0,		/* Set to examine the signature curve detail*/
	pert,			/* Perturbation value				*/
        ipert,                  /* index of the perturbation loop		*/
	start = 1,		/* Starting value for signature curve 		*/
	end = MAXINT,		/* Ending value for signature curve		*/
	streamopt = 0,		/* Streaming mode flag				*/
	printopt = 1;		/* Debug print statements flag			*/
    
    ArgStruct	args;		/* Argumentsfor all the calls			*/
    
    double t, t0, t1, t2,	/* Time variables				*/
	tlast,			/* Time for the last transmission		*/
	tzero = 0,
	latency,		/* Network message latency			*/
	synctime;		/* Network synchronization time 		*/
    
    Data *bwdata;		/* Bandwidth curve data 			*/
    
    bool bNoCache = false;
    bool bHeadToHead = false;
    bool bSavePert = false;

    MPI_Init(&argc, &argv);
    
    MPI_Comm_size(MPI_COMM_WORLD, &g_nNproc);
    MPI_Comm_rank(MPI_COMM_WORLD, &g_nIproc);
    
    if (g_nNproc != 2)
    {
	if (g_nIproc == 0)
	    PrintOptions();
	MPI_Finalize();
	exit(0);
    }
    
    GetOptDouble(&argc, &argv, "-time", &g_STOPTM);
    GetOptInt(&argc, &argv, "-reps", &g_NSAMP);
    GetOptInt(&argc, &argv, "-start", &start);
    GetOptInt(&argc, &argv, "-end", &end);
    bNoCache = GetOpt(&argc, &argv, "-nocache");
    bHeadToHead = GetOpt(&argc, &argv, "-headtohead");
    if (GetOpt(&argc, &argv, "-noprint"))
	printopt = 0;
    bSavePert = GetOpt(&argc, &argv, "-pert");
    
    bwdata = malloc((g_NSAMP+1) * sizeof(Data));

    if (g_nIproc == 0)
	strcpy(s, "Netpipe.out");
    GetOptString(&argc, &argv, "-out", s);
    
    if (start > end)
    {
	fprintf(stdout, "Start MUST be LESS than end\n");
	exit(420132);
    }
    
    args.nbuff = TRIALS;
    
    Setup(&args);
    Establish(&args);
    
    if (args.tr)
    {
	if ((out = fopen(s, "w")) == NULL)
	{
	    fprintf(stdout,"Can't open %s for output\n", s);
	    exit(1);
	}
    }
    
    latency = TestLatency(&args);
    synctime = TestSyncTime(&args);
 
    
    if (args.tr)
    {
	SendTime(&args, &latency, &nzero);
    }
    else
    {
	RecvTime(&args, &latency, &nzero);
    }
    if (args.tr && printopt)
    {
	printf("Latency: %f\n", latency);
	fflush(stdout);
	printf("Sync Time: %f\n", synctime);
	fflush(stdout);
	printf("Now starting main loop\n");
	fflush(stdout);
    }
    tlast = latency;
    inc = (start > 1 && !detailflag) ? start/2: inc;
    args.bufflen = start;
    
    /* Main loop of benchmark */
    for (nq = n = 0, len = start; 
         n < g_NSAMP && tlast < g_STOPTM && len <= end; 
	 len = len + inc, nq++)
    {
	if (nq > 2 && !detailflag)
	    inc = ((nq % 2))? inc + inc: inc;
	
	/* This is a perturbation loop to test nearby values */
	for (ipert = 0, pert = (!detailflag && inc > PERT + 1)? -PERT: 0;
	     pert <= PERT; 
	     ipert++, n++, pert += (!detailflag && inc > PERT + 1)? PERT: PERT + 1)
	{
	    
	    /* Calculate howmany times to repeat the experiment. */
	    if (args.tr)
	    {
		nrepeat = (int)(MAX((RUNTM / ((double)args.bufflen /
		    (args.bufflen - inc + 1.0) * tlast)), TRIALS));
		SendTime(&args, &tzero, &nrepeat);
	    }
	    else
	    {
		nrepeat = 1; /* Just needs to be greater than zero */
		RecvTime(&args, &tzero, &nrepeat);
	    }
	    
	    /* Allocate the buffer */
	    args.bufflen = len + pert;
	    /* printf("allocating %d bytes\n", args.bufflen * nrepeat + bufalign); */
	    if (bNoCache)
	    {
		if ((args.buff = (char *)malloc(args.bufflen * nrepeat + bufalign)) == (char *)NULL)
		{
		    fprintf(stdout,"Couldn't allocate memory\n");
		    fflush(stdout);
		    break;
		}
	    }
	    else
	    {
		if ((args.buff = (char *)malloc(args.bufflen + bufalign)) == (char *)NULL)
		{
		    fprintf(stdout,"Couldn't allocate memory\n");
		    fflush(stdout);
		    break;
		}
	    }
	    /* if ((args.buff1 = (char *)malloc(args.bufflen * nrepeat + bufalign)) == (char *)NULL) */
	    if ((args.buff1 = (char *)malloc(args.bufflen + bufalign)) == (char *)NULL)
	    {
		fprintf(stdout,"Couldn't allocate memory\n");
		fflush(stdout);
		break;
	    }
	    /* Possibly align the data buffer */
	    memtmp = args.buff;
	    memtmp1 = args.buff1;
	    
	    if (!bNoCache)
	    {
		if (bufalign != 0)
		{
		    args.buff += (bufalign - ((int)args.buff % bufalign) + bufoffset) % bufalign;
		    /* args.buff1 += (bufalign - ((int)args.buff1 % bufalign) + bufoffset) % bufalign; */
		}
	    }
	    args.buff1 += (bufalign - ((int)args.buff1 % bufalign) + bufoffset) % bufalign;
	    
	    if (args.tr && printopt)
	    {
		fprintf(stdout,"%3d: %9d bytes %4d times --> ",
		    n, args.bufflen, nrepeat);
		fflush(stdout);
	    }
	    
	    /* Finally, we get to transmit or receive and time */
	    if (args.tr)
	    {
		bwdata[n].t = LONGTIME;
		t2 = t1 = 0;
		for (i = 0; i < TRIALS; i++)
		{
		    if (bNoCache)
		    {
			if (bufalign != 0)
			{
			    args.buff = memtmp + ((bufalign - ((int)args.buff % bufalign) + bufoffset) % bufalign);
			    /* args.buff1 = memtmp1 + ((bufalign - ((int)args.buff1 % bufalign) + bufoffset) % bufalign); */
			}
			else
			{
			    args.buff = memtmp;
			    /* args.buff1 = memtmp1; */
			}
		    }
		    
		    Sync(&args);
		    t0 = When();
		    for (j = 0; j < nrepeat; j++)
		    {
			if (bHeadToHead)
			    SendRecvData(&args);
			else
			{
			    SendData(&args);
			    if (!streamopt)
			    {
				RecvData(&args);
			    }
			}
			if (bNoCache)
			{
			    args.buff += args.bufflen;
			    /* args.buff1 += args.bufflen; */
			}
		    }
		    t = (When() - t0)/((1 + !streamopt) * nrepeat);
		    
		    if (!streamopt)
		    {
			t2 += t*t;
			t1 += t;
			bwdata[n].t = MIN(bwdata[n].t, t);
		    }
		}
		if (!streamopt)