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select_c.c
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select_c.c
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/* tab:8
*
* select_c.c - Parallel Selection Algorithm
*
*
* "Copyright (c) 1996 The Regents of the University of Maryland.
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose, without fee, and without written agreement is
* hereby granted, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* IN NO EVENT SHALL THE UNIVERSITY OF MARYLAND BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
* MARYLAND HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE UNIVERSITY OF MARYLAND SPECIFICALLY DISCLAIMS ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF MARYLAND HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
*
* Authors: David A. Bader <dbader@umiacs.umd.edu>
* Joseph F. Ja'Ja' <joseph@umiacs.umd.edu>
* Institute for Advanced Computer Studies
* Department of Electrical Engineering
* AV Williams Building
* College Park, MD 20742
*
* Version: 1.0
* Creation Date: February 6, 1996
* Filename: select_c.c
* History:
*/
#include "select_c.h"
#include "select_b.h"
#include "select_a.h"
#include "select_seq.h"
static int THRESH_SEL;
#define THRESH_SEL_INIT max((PROCS*PROCS),4096)
static int SELECT_MIN_MAX;
#define SELECT_MIN_MAX_INIT max(PROCS,PROCS*PROCS)
/* NOTE:
* You must call all_select_c_init() before a call to all_select_c...()
*/
#define PROFILE_DETAILED 0
#define PROFILE_GENERAL 0
#define DEBUG 0
#if PROFILE_GENERAL
static double time_select, time_lb;
#endif
static int meds_i[MAXPROCS];
static double meds_d[MAXPROCS];
int all_select_c_i(int M, int *A,
int *N, int total_n, int i) {
#define DATA_TYPE int
int k,
t,
myN;
DATA_TYPE
g,
mom,
result;
#if PROFILE_DETAILED
double secs;
#endif
#if PROFILE_GENERAL
double secs_gen;
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
if (MYPROC==0) {
fprintf(outfile,"PE %2d: all_select_c: total_n: %d i: %d\n",
MYPROC, total_n, i);
fflush(outfile);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
if (total_n < THRESH_SEL) {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
result = all_select_gather_i(M, A, N, total_n, i);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Seq2 n: %12d ",total_n);
fprintf(outfile,"Time for Seq2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
MPI_Bcast(&result, 1, MPI_INT, 0, MPI_COMM_WORLD);
}
else {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
all_LoadBalance_b_i(M, A, N, total_n);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_lb += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"LB2 n: %12d ",total_n);
fprintf(outfile,"Time for LB2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
myN = N[MYPROC];
g = select_mom_i(A, myN, myN >> 1);
MPI_Gather(&g, 1, MPI_INT,
meds_i, 1, MPI_INT,
0, MPI_COMM_WORLD);
if (MYPROC==0) mom = select_mom_i(meds_i, PROCS, PROCS>>1);
MPI_Bcast(&mom, 1, MPI_INT, 0, MPI_COMM_WORLD);
k = partition_unk_piv_i(A, myN, mom);
MPI_Allreduce(&k, &t, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
if (t==total_n) {
result = mom;
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Sel2 n: %12d ",total_n);
fprintf(outfile,"Time for Sel2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
}
else {
if (i <= t) {
total_n = t;
myN = k;
}
else {
total_n -= t;
i -= t;
myN -= k;
bcopy(A+k, A, myN*sizeof(DATA_TYPE));
}
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Sel2 n: %12d ",total_n);
fprintf(outfile,"Time for Sel2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
MPI_Allgather(&myN, 1, MPI_INT, N, 1, MPI_INT, MPI_COMM_WORLD);
result = all_select_c_i(M, A, N, total_n, i);
}
}
#if PROFILE_GENERAL
#endif
return (result);
#undef DATA_TYPE
}
double all_select_c_d(int M, double *A,
int *N, int total_n, int i) {
#define DATA_TYPE double
int k,
t,
myN;
DATA_TYPE
g,
mom,
result;
#if PROFILE_DETAILED
double secs;
#endif
#if PROFILE_GENERAL
double secs_gen;
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
if (MYPROC==0) {
fprintf(outfile,"PE %2d: all_select_c: total_n: %d i: %d\n",
MYPROC, total_n, i);
fflush(outfile);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
if (total_n <= THRESH_SEL) {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
result = all_select_gather_d(M, A, N, total_n, i);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Seq2 n: %12d ",total_n);
fprintf(outfile,"Time for Seq2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
MPI_Bcast(&result, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD);
}
else {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
all_LoadBalance_b_d(M, A, N, total_n);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_lb += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"LB2 n: %12d ",total_n);
fprintf(outfile,"Time for LB2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
myN = N[MYPROC];
g = select_mom_d(A, myN, myN >> 1);
MPI_Gather(&g, 1, MPI_DOUBLE,
meds_d, 1, MPI_DOUBLE,
0, MPI_COMM_WORLD);
if (MYPROC==0) mom = select_mom_d(meds_d, PROCS, PROCS>>1);
MPI_Bcast(&mom, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD);
k = partition_unk_piv_d(A, myN, mom);
MPI_Allreduce(&k, &t, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
if (t==total_n) {
result = mom;
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Sel2 n: %12d ",total_n);
fprintf(outfile,"Time for Sel2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
}
else {
if (i <= t) {
total_n = t;
myN = k;
}
else {
total_n -= t;
i -= t;
myN -= k;
bcopy(A+k, A, myN*sizeof(DATA_TYPE));
}
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Sel2 n: %12d ",total_n);
fprintf(outfile,"Time for Sel2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
MPI_Allgather(&myN, 1, MPI_INT, N, 1, MPI_INT, MPI_COMM_WORLD);
result = all_select_c_d(M, A, N, total_n, i);
}
}
#if PROFILE_GENERAL
#endif
return (result);
#undef DATA_TYPE
}
int all_select_min_alloc_i(int M, int *A,
int *N, int total_n, int i,
int *sublist, int X) {
#define DATA_TYPE int
int myN,
j, t;
DATA_TYPE
piv,
result,
r,
*seqval;
myN = N[MYPROC];
t = myN;
if (i==1) {
r = A[0];
for (j=1 ; j<t ; j++)
r = min(r, A[j]);
MPI_Allreduce(&r, &result, 1, MPI_INT, MPI_MIN, MPI_COMM_WORLD);
}
else{
#if 0
piv = select_mom_alloc_i(A, t, i, sublist);
j = partition_i(A, t, piv);
#else
/* Need to get the min X elements */
sort_min_i(A, myN, X);
#endif
MPI_Barrier(MPI_COMM_WORLD);
if (MYPROC==0) {
MPI_Status stat;
seqval = (DATA_TYPE*)malloc(total_n*sizeof(DATA_TYPE));
assert_malloc(seqval);
bcopy(A, seqval, X*sizeof(DATA_TYPE));
t = X;
for (j=1; j<PROCS ; j++) {
MPI_Recv(seqval+t, X, MPI_INT, j, MPI_ANY_TAG,
MPI_COMM_WORLD, &stat);
t += X;
}
#if 0
result = select_mom_alloc_i(seqval, t, i,sublist);
#else
result = select_merge_i(seqval, i, X, PROCS);
#endif
free(seqval);
}
else {
MPI_Send(A, X, MPI_INT, 0, 0, MPI_COMM_WORLD);
}
MPI_Bcast(&result, 1, MPI_INT, 0, MPI_COMM_WORLD);
}
return (result);
}
int all_select_max_alloc_i(int M, int *A,
int *N, int total_n, int i,
int *sublist, int X) {
#define DATA_TYPE int
int myN,
j, t,
offset,
last;
DATA_TYPE
piv,
r,
result,
*seqval;
myN = N[MYPROC];
t = myN;
if (i==total_n) {
r = A[0];
for (j=1 ; j<t ; j++)
r = max(r, A[j]);
MPI_Allreduce(&r, &result, 1, MPI_INT, MPI_MAX, MPI_COMM_WORLD);
}
else {
#if 0
piv = select_mom_alloc_i(A, t, i, sublist);
j = partition_i(A, t, piv);
#else
/* Need to get the max X elements... */
sort_max_i(A, myN, X);
#endif
MPI_Barrier(MPI_COMM_WORLD);
if (MYPROC==0) {
MPI_Status stat;
seqval = (DATA_TYPE*)malloc(total_n*sizeof(DATA_TYPE));
assert_malloc(seqval);
bcopy(A + (N[0] - X), seqval, X*sizeof(DATA_TYPE));
t = X;
for (j=1; j<PROCS ; j++) {
MPI_Recv(seqval+t, X, MPI_INT, j, MPI_ANY_TAG,
MPI_COMM_WORLD, &stat);
t += X;
}
j = i - (total_n - X*PROCS);
#if 0
result = select_mom_alloc_i(seqval, t, j,sublist);
#else
result = select_merge_i(seqval, j, X, PROCS);
#endif
free(seqval);
}
else {
MPI_Send(A + (N[MYPROC] - X), X, MPI_INT, 0, 0, MPI_COMM_WORLD);
}
MPI_Bcast(&result, 1, MPI_INT, 0, MPI_COMM_WORLD);
}
return (result);
#undef DATA_TYPE
}
double all_select_min_alloc_d(int M, double *A,
int *N, int total_n, int i,
double *sublist, int X) {
#define DATA_TYPE double
int myN,
j, t;
DATA_TYPE
piv,
r,
result,
*seqval;
myN = N[MYPROC];
t = myN;
if (i==1) {
r = A[0];
for (j=1 ; j<t ; j++)
r = min(r, A[j]);
MPI_Allreduce(&r, &result, 1, MPI_DOUBLE, MPI_MIN, MPI_COMM_WORLD);
}
else {
#if 0
piv = select_mom_alloc_d(A, t, i, sublist);
j = partition_d(A, t, piv);
#else
sort_min_d(A, myN, X);
#endif
MPI_Barrier(MPI_COMM_WORLD);
if (MYPROC==0) {
MPI_Status stat;
seqval = (DATA_TYPE*)malloc(total_n*sizeof(DATA_TYPE));
assert_malloc(seqval);
bcopy(A, seqval, X*sizeof(double));
t = X;
for (j=1; j<PROCS ; j++) {
MPI_Recv(seqval+t, X, MPI_DOUBLE, j, MPI_ANY_TAG,
MPI_COMM_WORLD, &stat);
t += X;
}
#if 0
result = select_mom_alloc_d(seqval, t, i,sublist);
#else
result = select_merge_d(seqval, i, X, PROCS);
#endif
free(seqval);
}
else {
MPI_Send(A, X, MPI_DOUBLE, 0, 0, MPI_COMM_WORLD);
}
MPI_Bcast(&result, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD);
}
return (result);
#undef DATA_TYPE
}
double all_select_max_alloc_d(int M, double *A,
int *N, int total_n, int i,
double *sublist, int X) {
#define DATA_TYPE double
int myN,
j, t,
offset,
last;
DATA_TYPE
piv,
r,
result,
*seqval;
myN = N[MYPROC];
t = myN;
if (i==total_n) {
r = A[0];
for (j=1 ; j<t ; j++)
r = max(r, A[j]);
MPI_Allreduce(&r, &result, 1, MPI_DOUBLE, MPI_MAX, MPI_COMM_WORLD);
}
else {
#if 0
piv = select_mom_alloc_d(A, t, i, sublist);
j = partition_d(A, t, piv);
#else
sort_max_d(A, myN, X);
#endif
MPI_Barrier(MPI_COMM_WORLD);
if (MYPROC==0) {
MPI_Status stat;
seqval = (DATA_TYPE*)malloc(total_n*sizeof(DATA_TYPE));
assert_malloc(seqval);
bcopy(A + (N[0] - X), seqval, X*sizeof(double));
t = X;
for (j=1; j<PROCS ; j++) {
MPI_Recv(seqval+t, X, MPI_DOUBLE, j, MPI_ANY_TAG,
MPI_COMM_WORLD, &stat);
t += X;
}
j = i - (total_n - X*PROCS);
#if 0
result = select_mom_alloc_d(seqval, t, j,sublist);
#else
result = select_merge_d(seqval, j, X, PROCS);
#endif
free(seqval);
}
else {
MPI_Send(A + (N[MYPROC] - X), X, MPI_DOUBLE, 0, 0, MPI_COMM_WORLD);
}
MPI_Bcast(&result, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD);
}
return (result);
#undef DATA_TYPE
}
int all_select_c_alloc_i(int M, int *A,
int *N, int total_n, int i,
int *sublist) {
#define DATA_TYPE int
int myN,
k,
t;
DATA_TYPE
g,
mom,
result;
#if PROFILE_DETAILED
double secs;
#endif
#if PROFILE_GENERAL
double secs_gen;
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
if (MYPROC==0) {
fprintf(outfile,"PE %2d: all_select_c: total_n: %d i: %d\n",
MYPROC, total_n, i);
fflush(outfile);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
if (total_n < THRESH_SEL) {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
result = all_select_gather_alloc_i(M, A, N, total_n, i, sublist);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Seq2 n: %12d ",total_n);
fprintf(outfile,"Time for Seq2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
MPI_Bcast(&result, 1, MPI_INT, 0, MPI_COMM_WORLD);
}
else {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
all_LoadBalance_b_i(M, A, N, total_n);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_lb += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"LB2 n: %12d ",total_n);
fprintf(outfile,"Time for LB2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
if (i <= SELECT_MIN_MAX) {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
result = all_select_min_alloc_i(M, A, N, total_n, i,
sublist, SELECT_MIN_MAX);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"MIN n: %12d ",total_n);
fprintf(outfile,"Time for MIN: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
}
else if (i >= total_n - SELECT_MIN_MAX) {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
result = all_select_max_alloc_i(M, A, N, total_n, i,
sublist, SELECT_MIN_MAX);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"MAX n: %12d ",total_n);
fprintf(outfile,"Time for MAX: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
}
else {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
myN = N[MYPROC];
g = select_mom_alloc_i(A, myN, myN >> 1, sublist);
MPI_Gather(&g, 1, MPI_INT,
meds_i, 1, MPI_INT,
0, MPI_COMM_WORLD);
if (MYPROC==0) mom = select_mom_alloc_i(meds_i, PROCS, PROCS>>1,sublist);
MPI_Bcast(&mom, 1, MPI_INT, 0, MPI_COMM_WORLD);
k = partition_unk_piv_i(A, myN, mom);
MPI_Allreduce(&k, &t, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
if (t==total_n) {
result = mom;
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Sel2 n: %12d ",total_n);
fprintf(outfile,"Time for Sel2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
}
else {
if (i <= t) {
total_n = t;
myN = k;
}
else {
total_n -= t;
i -= t;
myN -= k;
bcopy(A+k, A, myN*sizeof(DATA_TYPE));
}
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Sel2 n: %12d ",total_n);
fprintf(outfile,"Time for Sel2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
MPI_Allgather(&myN, 1, MPI_INT, N, 1, MPI_INT, MPI_COMM_WORLD);
result = all_select_c_alloc_i(M, A, N, total_n, i,sublist);
}
}
}
return (result);
#undef DATA_TYPE
}
double all_select_c_alloc_d(int M, double *A,
int *N, int total_n, int i,
double* sublist) {
#define DATA_TYPE double
int k,
t,
myN;
DATA_TYPE
g,
mom,
result;
#if PROFILE_DETAILED
double secs;
#endif
#if PROFILE_GENERAL
double secs_gen;
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
if (MYPROC==0) {
fprintf(outfile,"PE %2d: all_select_c: total_n: %d i: %d\n",
MYPROC, total_n, i);
fflush(outfile);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
if (total_n <= THRESH_SEL) {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
result = all_select_gather_alloc_d(M, A, N, total_n, i, sublist);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_select += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"Seq2 n: %12d ",total_n);
fprintf(outfile,"Time for Seq2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
MPI_Bcast(&result, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD);
}
else {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif
all_LoadBalance_b_d(M, A, N, total_n);
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime() - secs_gen;
time_lb += secs_gen;
MPI_Barrier(MPI_COMM_WORLD);
#endif
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime() - secs;
if (MYPROC==0) {
fprintf(outfile,"LB2 n: %12d ",total_n);
fprintf(outfile,"Time for LB2: %9.6f\n",secs);
}
MPI_Barrier(MPI_COMM_WORLD);
#endif
if (i <= SELECT_MIN_MAX) {
#if PROFILE_DETAILED
MPI_Barrier(MPI_COMM_WORLD);
secs = MPI_Wtime();
#endif
#if PROFILE_GENERAL
MPI_Barrier(MPI_COMM_WORLD);
secs_gen = MPI_Wtime();
#endif