| 23 |
|
/* number of children (-1 in child) */ |
| 24 |
|
static int nchild = 0; |
| 25 |
|
|
| 26 |
+ |
typedef struct { |
| 27 |
+ |
int nrows, ncols; /* array size (matches migration) */ |
| 28 |
+ |
float *price; /* migration prices */ |
| 29 |
+ |
short *sord; /* sort for each row, low to high */ |
| 30 |
+ |
} PRICEMAT; /* sorted pricing matrix */ |
| 31 |
+ |
|
| 32 |
+ |
#define pricerow(p,i) ((p)->price + (i)*(p)->ncols) |
| 33 |
+ |
#define psortrow(p,i) ((p)->sord + (i)*(p)->ncols) |
| 34 |
+ |
|
| 35 |
|
/* Create a new migration holder (sharing memory for multiprocessing) */ |
| 36 |
|
static MIGRATION * |
| 37 |
|
new_migration(RBFNODE *from_rbf, RBFNODE *to_rbf) |
| 133 |
|
|
| 134 |
|
#endif /* ! _WIN32 */ |
| 135 |
|
|
| 136 |
+ |
/* Comparison routine needed for sorting price row */ |
| 137 |
+ |
static int |
| 138 |
+ |
msrt_cmp(void *b, const void *p1, const void *p2) |
| 139 |
+ |
{ |
| 140 |
+ |
PRICEMAT *pm = (PRICEMAT *)b; |
| 141 |
+ |
int ri = ((const short *)p1 - pm->sord) / pm->ncols; |
| 142 |
+ |
float c1 = pricerow(pm,ri)[*(const short *)p1]; |
| 143 |
+ |
float c2 = pricerow(pm,ri)[*(const short *)p2]; |
| 144 |
+ |
|
| 145 |
+ |
if (c1 > c2) return(1); |
| 146 |
+ |
if (c1 < c2) return(-1); |
| 147 |
+ |
return(0); |
| 148 |
+ |
} |
| 149 |
+ |
|
| 150 |
|
/* Compute (and allocate) migration price matrix for optimization */ |
| 151 |
< |
static float * |
| 152 |
< |
price_routes(const RBFNODE *from_rbf, const RBFNODE *to_rbf) |
| 151 |
> |
static void |
| 152 |
> |
price_routes(PRICEMAT *pm, const RBFNODE *from_rbf, const RBFNODE *to_rbf) |
| 153 |
|
{ |
| 131 |
– |
float *pmtx = (float *)malloc(sizeof(float) * |
| 132 |
– |
from_rbf->nrbf * to_rbf->nrbf); |
| 154 |
|
FVECT *vto = (FVECT *)malloc(sizeof(FVECT) * to_rbf->nrbf); |
| 155 |
|
int i, j; |
| 156 |
|
|
| 157 |
< |
if ((pmtx == NULL) | (vto == NULL)) { |
| 157 |
> |
pm->nrows = from_rbf->nrbf; |
| 158 |
> |
pm->ncols = to_rbf->nrbf; |
| 159 |
> |
pm->price = (float *)malloc(sizeof(float) * pm->nrows*pm->ncols); |
| 160 |
> |
pm->sord = (short *)malloc(sizeof(short) * pm->nrows*pm->ncols); |
| 161 |
> |
|
| 162 |
> |
if ((pm->price == NULL) | (pm->sord == NULL) | (vto == NULL)) { |
| 163 |
|
fprintf(stderr, "%s: Out of memory in migration_costs()\n", |
| 164 |
|
progname); |
| 165 |
|
exit(1); |
| 171 |
|
const double from_ang = R2ANG(from_rbf->rbfa[i].crad); |
| 172 |
|
FVECT vfrom; |
| 173 |
|
ovec_from_pos(vfrom, from_rbf->rbfa[i].gx, from_rbf->rbfa[i].gy); |
| 174 |
< |
for (j = to_rbf->nrbf; j--; ) |
| 175 |
< |
pmtx[i*to_rbf->nrbf + j] = acos(DOT(vfrom, vto[j])) + |
| 174 |
> |
for (j = to_rbf->nrbf; j--; ) { |
| 175 |
> |
pricerow(pm,i)[j] = acos(DOT(vfrom, vto[j])) + |
| 176 |
|
fabs(R2ANG(to_rbf->rbfa[j].crad) - from_ang); |
| 177 |
+ |
psortrow(pm,i)[j] = j; |
| 178 |
+ |
} |
| 179 |
+ |
qsort_r(psortrow(pm,i), pm->ncols, sizeof(short), pm, &msrt_cmp); |
| 180 |
|
} |
| 181 |
|
free(vto); |
| 153 |
– |
return(pmtx); |
| 182 |
|
} |
| 183 |
|
|
| 184 |
< |
/* Comparison routine needed for sorting price row */ |
| 185 |
< |
static const float *price_arr; |
| 186 |
< |
static int |
| 159 |
< |
msrt_cmp(const void *p1, const void *p2) |
| 184 |
> |
/* Free price matrix */ |
| 185 |
> |
static void |
| 186 |
> |
free_routes(PRICEMAT *pm) |
| 187 |
|
{ |
| 188 |
< |
float c1 = price_arr[*(const int *)p1]; |
| 189 |
< |
float c2 = price_arr[*(const int *)p2]; |
| 163 |
< |
|
| 164 |
< |
if (c1 > c2) return(1); |
| 165 |
< |
if (c1 < c2) return(-1); |
| 166 |
< |
return(0); |
| 188 |
> |
free(pm->price); pm->price = NULL; |
| 189 |
> |
free(pm->sord); pm->sord = NULL; |
| 190 |
|
} |
| 191 |
|
|
| 192 |
|
/* Compute minimum (optimistic) cost for moving the given source material */ |
| 193 |
|
static double |
| 194 |
< |
min_cost(double amt2move, const double *avail, const float *price, int n) |
| 194 |
> |
min_cost(double amt2move, const double *avail, const PRICEMAT *pm, int s) |
| 195 |
|
{ |
| 173 |
– |
static int *price_sort = NULL; |
| 174 |
– |
static int n_alloc = 0; |
| 196 |
|
double total_cost = 0; |
| 197 |
< |
int i; |
| 197 |
> |
int j; |
| 198 |
|
|
| 199 |
|
if (amt2move <= FTINY) /* pre-emptive check */ |
| 200 |
|
return(0.); |
| 180 |
– |
if (n > n_alloc) { /* (re)allocate sort array */ |
| 181 |
– |
if (n_alloc) free(price_sort); |
| 182 |
– |
price_sort = (int *)malloc(sizeof(int)*n); |
| 183 |
– |
if (price_sort == NULL) { |
| 184 |
– |
fprintf(stderr, "%s: Out of memory in min_cost()\n", |
| 185 |
– |
progname); |
| 186 |
– |
exit(1); |
| 187 |
– |
} |
| 188 |
– |
n_alloc = n; |
| 189 |
– |
} |
| 190 |
– |
for (i = n; i--; ) |
| 191 |
– |
price_sort[i] = i; |
| 192 |
– |
price_arr = price; |
| 193 |
– |
qsort(price_sort, n, sizeof(int), &msrt_cmp); |
| 201 |
|
/* move cheapest first */ |
| 202 |
< |
for (i = 0; i < n && amt2move > FTINY; i++) { |
| 203 |
< |
int d = price_sort[i]; |
| 202 |
> |
for (j = 0; j < pm->ncols && amt2move > FTINY; j++) { |
| 203 |
> |
int d = psortrow(pm,s)[j]; |
| 204 |
|
double amt = (amt2move < avail[d]) ? amt2move : avail[d]; |
| 205 |
|
|
| 206 |
< |
total_cost += amt * price[d]; |
| 206 |
> |
total_cost += amt * pricerow(pm,s)[d]; |
| 207 |
|
amt2move -= amt; |
| 208 |
|
} |
| 209 |
|
return(total_cost); |
| 211 |
|
|
| 212 |
|
/* Take a step in migration by choosing optimal bucket to transfer */ |
| 213 |
|
static double |
| 214 |
< |
migration_step(MIGRATION *mig, double *src_rem, double *dst_rem, const float *pmtx) |
| 214 |
> |
migration_step(MIGRATION *mig, double *src_rem, double *dst_rem, const PRICEMAT *pm) |
| 215 |
|
{ |
| 216 |
|
const double maxamt = .1; |
| 217 |
|
const double minamt = maxamt*5e-6; |
| 224 |
|
} cur, best; |
| 225 |
|
int i; |
| 226 |
|
|
| 227 |
< |
if (mtx_nrows(mig) > n_alloc) { /* allocate cost array */ |
| 227 |
> |
if (pm->nrows > n_alloc) { /* allocate cost array */ |
| 228 |
|
if (n_alloc) |
| 229 |
|
free(src_cost); |
| 230 |
< |
src_cost = (double *)malloc(sizeof(double)*mtx_nrows(mig)); |
| 230 |
> |
src_cost = (double *)malloc(sizeof(double)*pm->nrows); |
| 231 |
|
if (src_cost == NULL) { |
| 232 |
|
fprintf(stderr, "%s: Out of memory in migration_step()\n", |
| 233 |
|
progname); |
| 234 |
|
exit(1); |
| 235 |
|
} |
| 236 |
< |
n_alloc = mtx_nrows(mig); |
| 236 |
> |
n_alloc = pm->nrows; |
| 237 |
|
} |
| 238 |
< |
for (i = mtx_nrows(mig); i--; ) /* starting costs for diff. */ |
| 239 |
< |
src_cost[i] = min_cost(src_rem[i], dst_rem, |
| 233 |
< |
pmtx+i*mtx_ncols(mig), mtx_ncols(mig)); |
| 238 |
> |
for (i = pm->nrows; i--; ) /* starting costs for diff. */ |
| 239 |
> |
src_cost[i] = min_cost(src_rem[i], dst_rem, pm, i); |
| 240 |
|
|
| 241 |
|
/* find best source & dest. */ |
| 242 |
|
best.s = best.d = -1; best.price = FHUGE; best.amt = 0; |
| 243 |
< |
for (cur.s = mtx_nrows(mig); cur.s--; ) { |
| 244 |
< |
const float *price = pmtx + cur.s*mtx_ncols(mig); |
| 243 |
> |
for (cur.s = pm->nrows; cur.s--; ) { |
| 244 |
> |
const float *price = pricerow(pm,cur.s); |
| 245 |
|
double cost_others = 0; |
| 246 |
|
if (src_rem[cur.s] <= minamt) |
| 247 |
|
continue; |
| 248 |
|
cur.d = -1; /* examine cheapest dest. */ |
| 249 |
< |
for (i = mtx_ncols(mig); i--; ) |
| 249 |
> |
for (i = pm->ncols; i--; ) |
| 250 |
|
if (dst_rem[i] > minamt && |
| 251 |
|
(cur.d < 0 || price[i] < price[cur.d])) |
| 252 |
|
cur.d = i; |
| 258 |
|
src_rem[cur.s] : dst_rem[cur.d]; |
| 259 |
|
if (cur.amt > maxamt) cur.amt = maxamt; |
| 260 |
|
dst_rem[cur.d] -= cur.amt; /* add up differential costs */ |
| 261 |
< |
for (i = mtx_nrows(mig); i--; ) |
| 261 |
> |
for (i = pm->nrows; i--; ) |
| 262 |
|
if (i != cur.s) |
| 263 |
< |
cost_others += min_cost(src_rem[i], dst_rem, |
| 258 |
< |
price, mtx_ncols(mig)) |
| 263 |
> |
cost_others += min_cost(src_rem[i], dst_rem, pm, i) |
| 264 |
|
- src_cost[i]; |
| 265 |
|
dst_rem[cur.d] += cur.amt; /* undo trial move */ |
| 266 |
|
cur.price += cost_others/cur.amt; /* adjust effective price */ |
| 296 |
|
create_migration(RBFNODE *from_rbf, RBFNODE *to_rbf) |
| 297 |
|
{ |
| 298 |
|
const double end_thresh = 5e-6; |
| 299 |
< |
float *pmtx; |
| 299 |
> |
PRICEMAT pmtx; |
| 300 |
|
MIGRATION *newmig; |
| 301 |
|
double *src_rem, *dst_rem; |
| 302 |
|
double total_rem = 1., move_amt; |
| 310 |
|
newmig = new_migration(from_rbf, to_rbf); |
| 311 |
|
if (run_subprocess()) |
| 312 |
|
return(newmig); /* child continues */ |
| 313 |
< |
pmtx = price_routes(from_rbf, to_rbf); |
| 313 |
> |
price_routes(&pmtx, from_rbf, to_rbf); |
| 314 |
|
src_rem = (double *)malloc(sizeof(double)*from_rbf->nrbf); |
| 315 |
|
dst_rem = (double *)malloc(sizeof(double)*to_rbf->nrbf); |
| 316 |
|
if ((src_rem == NULL) | (dst_rem == NULL)) { |
| 332 |
|
for (i = to_rbf->nrbf; i--; ) |
| 333 |
|
dst_rem[i] = rbf_volume(&to_rbf->rbfa[i]) / to_rbf->vtotal; |
| 334 |
|
do { /* move a bit at a time */ |
| 335 |
< |
move_amt = migration_step(newmig, src_rem, dst_rem, pmtx); |
| 335 |
> |
move_amt = migration_step(newmig, src_rem, dst_rem, &pmtx); |
| 336 |
|
total_rem -= move_amt; |
| 337 |
|
#ifdef DEBUG |
| 338 |
|
if (!nchild) |
| 352 |
|
mtx_coef(newmig,i,j) *= nf; |
| 353 |
|
} |
| 354 |
|
end_subprocess(); /* exit here if subprocess */ |
| 355 |
< |
free(pmtx); /* free working arrays */ |
| 355 |
> |
free_routes(&pmtx); /* free working arrays */ |
| 356 |
|
free(src_rem); |
| 357 |
|
free(dst_rem); |
| 358 |
|
return(newmig); |
