--- /dev/null
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+
+#include "mpi.h"
+#include "npbparams.h"
+
+#include "randlc.h"
+
+#ifndef CLASS
+#define CLASS 'S'
+#define NUM_PROCS 1
+#endif
+#define true 1
+#define false 0
+
+
+//---NOTE : all the timers function have been modified to
+// avoid global timers (privatize these).
+ // ----------------------- timers ---------------------
+ void timer_clear(double *onetimer) {
+ //elapsed[n] = 0.0;
+ *onetimer = 0.0;
+ }
+
+ void timer_start(double *onetimer) {
+ *onetimer = MPI_Wtime();
+ }
+
+ void timer_stop(int n,double *elapsed,double *start) {
+ double t, now;
+
+ now = MPI_Wtime();
+ t = now - start[n];
+ elapsed[n] += t;
+ }
+
+ double timer_read(int n, double *elapsed) { /* ok, useless, but jsut to keep function call */
+ return(elapsed[n]);
+ }
+ /********************************************************************
+ ***************** V R A N L C ******************
+ ***************** *****************/
+ double vranlc(int n, double x, double a, double *y)
+ {
+ int i;
+ long i246m1=0x00003FFFFFFFFFFF;
+ long LLx, Lx, La;
+ double d2m46;
+
+// This doesn't work, because the compiler does the calculation in 32
+// bits and overflows. No standard way (without f90 stuff) to specify
+// that the rhs should be done in 64 bit arithmetic.
+// parameter(i246m1=2**46-1)
+
+ d2m46=pow(0.5,46);
+
+// c Note that the v6 compiler on an R8000 does something stupid with
+// c the above. Using the following instead (or various other things)
+// c makes the calculation run almost 10 times as fast.
+//
+// c save d2m46
+// c data d2m46/0.0d0/
+// c if (d2m46 .eq. 0.0d0) then
+// c d2m46 = 0.5d0**46
+// c endif
+
+ Lx = (long)x;
+ La = (long)a;
+ //fprintf(stdout,("================== Vranlc ================");
+ //fprintf(stdout,("Before Loop: Lx = " + Lx + ", La = " + La);
+ LLx = Lx;
+ for (i=0; i< n; i++) {
+ Lx = Lx*La & i246m1 ;
+ LLx = Lx;
+ y[i] = d2m46 * (double)LLx;
+ /*
+ if(i == 0) {
+ fprintf(stdout,("After loop 0:");
+ fprintf(stdout,("Lx = " + Lx + ", La = " + La);
+ fprintf(stdout,("d2m46 = " + d2m46);
+ fprintf(stdout,("LLX(Lx) = " + LLX.doubleValue());
+ fprintf(stdout,("Y[0]" + y[0]);
+ }
+ */
+ }
+
+ x = (double)LLx;
+ /*
+ fprintf(stdout,("Change: Lx = " + Lx);
+ fprintf(stdout,("=============End Vranlc ================");
+ */
+ return x;
+ }
+
+
+
+//-------------- the core (unique function) -----------
+ void doTest(int argc, char **argv) {
+ double dum[3] = {1.,1.,1.};
+ double x1, x2, sx, sy, tm, an, tt, gc;
+ double Mops;
+ double epsilon=1.0E-8, a = 1220703125., s=271828183.;
+ double t1, t2, t3, t4;
+ double sx_verify_value, sy_verify_value, sx_err, sy_err;
+
+#include "npbparams.h"
+ int mk=16,
+ // --> set by make : in npbparams.h
+ //m=28, // for CLASS=A
+ //m=30, // for CLASS=B
+ //npm=2, // NPROCS
+ mm = m-mk,
+ nn = (int)(pow(2,mm)),
+ nk = (int)(pow(2,mk)),
+ nq=10,
+ np,
+ node,
+ no_nodes,
+ i,
+ ik,
+ kk,
+ l,
+ k, nit, no_large_nodes,
+ np_add, k_offset, j;
+ int me, nprocs, root=0, dp_type;
+ int verified,
+ timers_enabled=true;
+ char size[500]; // mind the size of the string to represent a big number
+
+ //Use in randlc..
+ int KS = 0;
+ double R23, R46, T23, T46;
+
+ double *qq = (double *) malloc (10000*sizeof(double));
+ double *start = (double *) malloc (64*sizeof(double));
+ double *elapsed = (double *) malloc (64*sizeof(double));
+
+ double *x = (double *) malloc (2*nk*sizeof(double));
+ double *q = (double *) malloc (nq*sizeof(double));
+
+ MPI_Init( &argc, &argv );
+ MPI_Comm_size( MPI_COMM_WORLD, &no_nodes);
+ MPI_Comm_rank( MPI_COMM_WORLD, &node);
+
+#ifdef USE_MPE
+ MPE_Init_log();
+#endif
+ root = 0;
+ if (node == root ) {
+
+ /* Because the size of the problem is too large to store in a 32-bit
+ * integer for some classes, we put it into a string (for printing).
+ * Have to strip off the decimal point put in there by the floating
+ * point print statement (internal file)
+ */
+ fprintf(stdout," NAS Parallel Benchmarks 3.2 -- EP Benchmark");
+ sprintf(size,"%d",pow(2,m+1));
+ //size = size.replace('.', ' ');
+ fprintf(stdout," Number of random numbers generated: %s\n",size);
+ fprintf(stdout," Number of active processes: %d\n",no_nodes);
+
+ }
+ verified = false;
+
+ /* c Compute the number of "batches" of random number pairs generated
+ c per processor. Adjust if the number of processors does not evenly
+ c divide the total number
+*/
+
+ np = nn / no_nodes;
+ no_large_nodes = nn % no_nodes;
+ if (node < no_large_nodes) np_add = 1;
+ else np_add = 0;
+ np = np + np_add;
+
+ if (np == 0) {
+ fprintf(stdout,"Too many nodes: %d %d",no_nodes,nn);
+ MPI_Abort(MPI_COMM_WORLD,1);
+ exit(0);
+ }
+
+/* c Call the random number generator functions and initialize
+ c the x-array to reduce the effects of paging on the timings.
+ c Also, call all mathematical functions that are used. Make
+ c sure these initializations cannot be eliminated as dead code.
+*/
+
+ //call vranlc(0, dum[1], dum[2], dum[3]);
+ // Array indexes start at 1 in Fortran, 0 in Java
+ vranlc(0, dum[0], dum[1], &(dum[2]));
+
+ dum[0] = randlc(&(dum[1]),&(dum[2]));
+ /////////////////////////////////
+ for (i=0;i<2*nk;i++) {
+ x[i] = -1e99;
+ }
+ Mops = log(sqrt(abs(1)));
+
+ /*
+ c---------------------------------------------------------------------
+ c Synchronize before placing time stamp
+ c---------------------------------------------------------------------
+ */
+ MPI_Barrier( MPI_COMM_WORLD );
+
+ timer_clear(&(elapsed[1]));
+ timer_clear(&(elapsed[2]));
+ timer_clear(&(elapsed[3]));
+ timer_start(&(start[1]));
+
+ t1 = a;
+ //fprintf(stdout,("(ep.f:160) t1 = " + t1);
+ t1 = vranlc(0, t1, a, x);
+ //fprintf(stdout,("(ep.f:161) t1 = " + t1);
+
+
+/* c Compute AN = A ^ (2 * NK) (mod 2^46). */
+
+ t1 = a;
+ //fprintf(stdout,("(ep.f:165) t1 = " + t1);
+ for (i=1; i <= mk+1; i++) {
+ t2 = randlc(&t1, &t1);
+ //fprintf(stdout,("(ep.f:168)[loop i=" + i +"] t1 = " + t1);
+ }
+ an = t1;
+ //fprintf(stdout,("(ep.f:172) s = " + s);
+ tt = s;
+ gc = 0.;
+ sx = 0.;
+ sy = 0.;
+ for (i=0; i < nq ; i++) {
+ q[i] = 0.;
+ }
+
+/*
+ Each instance of this loop may be performed independently. We compute
+ the k offsets separately to take into account the fact that some nodes
+ have more numbers to generate than others
+*/
+
+ if (np_add == 1)
+ k_offset = node * np -1;
+ else
+ k_offset = no_large_nodes*(np+1) + (node-no_large_nodes)*np -1;
+
+ int stop = false;
+ for(k = 1; k <= np; k++) SMPI_SAMPLE_LOCAL(0.25 * np) {
+ stop = false;
+ kk = k_offset + k ;
+ t1 = s;
+ //fprintf(stdout,("(ep.f:193) t1 = " + t1);
+ t2 = an;
+
+// Find starting seed t1 for this kk.
+
+ for (i=1;i<=100 && !stop;i++) {
+ ik = kk / 2;
+ //fprintf(stdout,("(ep.f:199) ik = " +ik+", kk = " + kk);
+ if (2 * ik != kk) {
+ t3 = randlc(&t1, &t2);
+ //fprintf(stdout,("(ep.f:200) t1= " +t1 );
+ }
+ if (ik==0)
+ stop = true;
+ else {
+ t3 = randlc(&t2, &t2);
+ kk = ik;
+ }
+ }
+// Compute uniform pseudorandom numbers.
+
+ //if (timers_enabled) timer_start(3);
+ timer_start(&(start[3]));
+ //call vranlc(2 * nk, t1, a, x) --> t1 and y are modified
+
+ //fprintf(stdout,">>>>>>>>>>>Before vranlc(l.210)<<<<<<<<<<<<<");
+ //fprintf(stdout,"2*nk = " + (2*nk));
+ //fprintf(stdout,"t1 = " + t1);
+ //fprintf(stdout,"a = " + a);
+ //fprintf(stdout,"x[0] = " + x[0]);
+ //fprintf(stdout,">>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<");
+
+ t1 = vranlc(2 * nk, t1, a, x);
+
+ //fprintf(stdout,(">>>>>>>>>>>After Enter vranlc (l.210)<<<<<<");
+ //fprintf(stdout,("2*nk = " + (2*nk));
+ //fprintf(stdout,("t1 = " + t1);
+ //fprintf(stdout,("a = " + a);
+ //fprintf(stdout,("x[0] = " + x[0]);
+ //fprintf(stdout,(">>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<");
+
+ //if (timers_enabled) timer_stop(3);
+ timer_stop(3,elapsed,start);
+
+/* Compute Gaussian deviates by acceptance-rejection method and
+ * tally counts in concentric square annuli. This loop is not
+ * vectorizable.
+ */
+ //if (timers_enabled) timer_start(2);
+ timer_start(&(start[2]));
+ for(i=1; i<=nk;i++) {
+ x1 = 2. * x[2*i-2] -1.0;
+ x2 = 2. * x[2*i-1] - 1.0;
+ t1 = x1*x1 + x2*x2;
+ if (t1 <= 1.) {
+ t2 = sqrt(-2. * log(t1) / t1);
+ t3 = (x1 * t2);
+ t4 = (x2 * t2);
+ l = (int)(abs(t3) > abs(t4) ? abs(t3) : abs(t4));
+ q[l] = q[l] + 1.;
+ sx = sx + t3;
+ sy = sy + t4;
+ }
+ /*
+ if(i == 1) {
+ fprintf(stdout,"x1 = " + x1);
+ fprintf(stdout,"x2 = " + x2);
+ fprintf(stdout,"t1 = " + t1);
+ fprintf(stdout,"t2 = " + t2);
+ fprintf(stdout,"t3 = " + t3);
+ fprintf(stdout,"t4 = " + t4);
+ fprintf(stdout,"l = " + l);
+ fprintf(stdout,"q[l] = " + q[l]);
+ fprintf(stdout,"sx = " + sx);
+ fprintf(stdout,"sy = " + sy);
+ }
+ */
+ }
+ //if (timers_enabled) timer_stop(2);
+ timer_stop(2,elapsed,start);
+ }
+
+ //int MPI_Allreduce(void *sbuf, void *rbuf, int count, MPI_Datatype dtype, MPI_Op op, MPI_Comm comm)
+ MPI_Allreduce(&sx, x, 1, MPI_DOUBLE, MPI_SUM, MPI_COMM_WORLD);
+ sx = x[0]; //FIXME : x[0] or x[1] => x[0] because fortran starts with 1
+ MPI_Allreduce(&sy, x, 1, MPI_DOUBLE, MPI_SUM, MPI_COMM_WORLD);
+ sy = x[0];
+ MPI_Allreduce(q, x, nq, MPI_DOUBLE, MPI_SUM, MPI_COMM_WORLD);
+
+ for(i = 0; i < nq; i++) {
+ q[i] = x[i];
+ }
+ for(i = 0; i < nq; i++) {
+ gc += q[i];
+ }
+
+ timer_stop(1,elapsed,start);
+ tm = timer_read(1,elapsed);
+ MPI_Allreduce(&tm, x, 1, MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
+ tm = x[0];
+
+ if(node == root) {
+ nit = 0;
+ verified = true;
+
+ if(m == 24) {
+ sx_verify_value = -3.247834652034740E3;
+ sy_verify_value = -6.958407078382297E3;
+ } else if(m == 25) {
+ sx_verify_value = -2.863319731645753E3;
+ sy_verify_value = -6.320053679109499E3;
+ } else if(m == 28) {
+ sx_verify_value = -4.295875165629892E3;
+ sy_verify_value = -1.580732573678431E4;
+ } else if(m == 30) {
+ sx_verify_value = 4.033815542441498E4;
+ sy_verify_value = -2.660669192809235E4;
+ } else if(m == 32) {
+ sx_verify_value = 4.764367927995374E4;
+ sy_verify_value = -8.084072988043731E4;
+ } else if(m == 36) {
+ sx_verify_value = 1.982481200946593E5;
+ sy_verify_value = -1.020596636361769E5;
+ } else {
+ verified = false;
+ }
+
+ /*
+ fprintf(stdout,("sx = " + sx);
+ fprintf(stdout,("sx_verify = " + sx_verify_value);
+ fprintf(stdout,("sy = " + sy);
+ fprintf(stdout,("sy_verify = " + sy_verify_value);
+ */
+ if(verified) {
+ sx_err = abs((sx - sx_verify_value)/sx_verify_value);
+ sy_err = abs((sy - sy_verify_value)/sy_verify_value);
+ /*
+ fprintf(stdout,("sx_err = " + sx_err);
+ fprintf(stdout,("sy_err = " + sx_err);
+ fprintf(stdout,("epsilon= " + epsilon);
+ */
+ verified = ((sx_err < epsilon) && (sy_err < epsilon));
+ }
+
+ Mops = (pow(2.0, m+1))/tm/1000;
+
+ fprintf(stdout,"EP Benchmark Results:\n");
+ fprintf(stdout,"CPU Time=%d\n",tm);
+ fprintf(stdout,"N = 2^%d\n",m);
+ fprintf(stdout,"No. Gaussain Pairs =%d\n",gc);
+ fprintf(stdout,"Sum = %lf %ld\n",sx,sy);
+ fprintf(stdout,"Count:");
+ for(i = 0; i < nq; i++) {
+ fprintf(stdout,"%d\t %ld\n",i,q[i]);
+ }
+
+ /*
+ print_results("EP", _class, m+1, 0, 0, nit, npm, no_nodes, tm, Mops,
+ "Random numbers generated", verified, npbversion,
+ compiletime, cs1, cs2, cs3, cs4, cs5, cs6, cs7) */
+ fprintf(stdout,"\nEP Benchmark Completed\n");
+ fprintf(stdout,"Class = %s\n", _class);
+ fprintf(stdout,"Size = %s\n", size);
+ fprintf(stdout,"Iteration = %d\n", nit);
+ fprintf(stdout,"Time in seconds = %lf\n",(tm/1000));
+ fprintf(stdout,"Total processes = %d\n",no_nodes);
+ fprintf(stdout,"Mops/s total = %lf\n",Mops);
+ fprintf(stdout,"Mops/s/process = %lf\n", Mops/no_nodes);
+ fprintf(stdout,"Operation type = Random number generated\n");
+ if(verified) {
+ fprintf(stdout,"Verification = SUCCESSFUL\n");
+ } else {
+ fprintf(stdout,"Verification = UNSUCCESSFUL\n");
+ }
+ fprintf(stdout,"Total time: %lf\n",(timer_read(1,elapsed)/1000));
+ fprintf(stdout,"Gaussian pairs: %lf\n",(timer_read(2,elapsed)/1000));
+ fprintf(stdout,"Random numbers: %lf\n",(timer_read(3,elapsed)/1000));
+ }
+#ifdef USE_MPE
+ MPE_Finish_log(argv[0]);
+#endif
+
+ MPI_Finalize();
+ }
+
+ int main(int argc, char **argv) {
+ doTest(argc,argv);
+ }
