3 /* A few tests for the maxmin library */
5 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
14 #include "xbt/sysdep.h"
15 #include "surf/maxmin.h"
17 #include "xbt/module.h"
22 XBT_LOG_NEW_DEFAULT_CATEGORY(surf_test,
23 "Messages specific for surf example");
25 #define PRINT_VAR(var) DEBUG1(#var " = %g",lmm_variable_getvalue(var));
26 #define SHOW_EXPR(expr) DEBUG1(#expr " = %g",expr);
30 /* ==l1== L2 ==L3== */
41 static double dichotomy(double func(double), double min, double max,
45 double min_func, max_func, middle_func;
47 double overall_error = 2 * min_error;
52 if ((min_func > 0 && max_func > 0))
54 if ((min_func < 0 && max_func < 0))
56 if ((min_func > 0 && max_func < 0))
59 while (overall_error > min_error) {
60 if ((min_func > 0 && max_func > 0) ||
61 (min_func < 0 && max_func < 0) || (min_func > 0 && max_func < 0)) {
65 middle = (max + min) / 2.0;
66 if ((min == middle) || (max == middle)) {
69 middle_func = func(middle);
71 if (middle_func < 0) {
73 min_func = middle_func;
74 overall_error = max - middle_func;
75 } else if (middle_func > 0) {
77 max_func = middle_func;
78 overall_error = max - middle_func;
83 return ((min + max) / 2.0);
88 static double diff_lagrange_test_1(double x)
90 return -(3 / (1 + 3 * x * x / 2) -
91 3 / (2 * (3 * (a_test_1 - x) * (a_test_1 - x) / 2 + 1)) +
93 (3 * (b_test_1 - a_test_1 + x) *
94 (b_test_1 - a_test_1 + x) / 2 + 1)));
97 void test1(method_t method);
98 void test1(method_t method)
100 lmm_system_t Sys = NULL;
101 lmm_constraint_t L1 = NULL;
102 lmm_constraint_t L2 = NULL;
103 lmm_constraint_t L3 = NULL;
105 lmm_variable_t R_1_2_3 = NULL;
106 lmm_variable_t R_1 = NULL;
107 lmm_variable_t R_2 = NULL;
108 lmm_variable_t R_3 = NULL;
110 double a = 1.0, b = 10.0;
112 if (method == LAGRANGE_VEGAS) {
113 //set default functions for TCP Vegas
114 lmm_set_default_protocol_function(func_vegas_fpi);
115 } else if (method == LAGRANGE_RENO) {
116 //set default functions for TCP Reno
117 lmm_set_default_protocol_function(func_reno_fpi);
121 Sys = lmm_system_new();
122 L1 = lmm_constraint_new(Sys, (void *) "L1", a);
123 L2 = lmm_constraint_new(Sys, (void *) "L2", b);
124 L3 = lmm_constraint_new(Sys, (void *) "L3", a);
126 R_1_2_3 = lmm_variable_new(Sys, (void *) "R 1->2->3", 1.0, -1.0, 3);
127 R_1 = lmm_variable_new(Sys, (void *) "R 1", 1.0, -1.0, 1);
128 R_2 = lmm_variable_new(Sys, (void *) "R 2", 1.0, -1.0, 1);
129 R_3 = lmm_variable_new(Sys, (void *) "R 3", 1.0, -1.0, 1);
131 lmm_update_variable_latency(Sys, R_1_2_3, 1.0);
132 lmm_update_variable_latency(Sys, R_1, 1.0);
133 lmm_update_variable_latency(Sys, R_2, 1.0);
134 lmm_update_variable_latency(Sys, R_3, 1.0);
136 lmm_expand(Sys, L1, R_1_2_3, 1.0);
137 lmm_expand(Sys, L2, R_1_2_3, 1.0);
138 lmm_expand(Sys, L3, R_1_2_3, 1.0);
140 lmm_expand(Sys, L1, R_1, 1.0);
142 lmm_expand(Sys, L2, R_2, 1.0);
144 lmm_expand(Sys, L3, R_3, 1.0);
147 if (method == MAXMIN) {
150 } else if (method == SDP) {
153 } else if (method == LAGRANGE_VEGAS) {
154 double x = 3 * a / 4 - 3 * b / 8 +
155 sqrt(9 * b * b + 4 * a * a - 4 * a * b) / 8;
156 /* Computed with mupad and D_f=1.0 */
157 double max_deviation = 0.0;
168 MAX(max_deviation, fabs(lmm_variable_getvalue(R_1) - x));
170 MAX(max_deviation, fabs(lmm_variable_getvalue(R_3) - x));
172 MAX(max_deviation, fabs(lmm_variable_getvalue(R_2) - (b - a + x)));
174 MAX(max_deviation, fabs(lmm_variable_getvalue(R_1_2_3) - (a - x)));
176 if (max_deviation > 1e-8) {
177 DEBUG1("Max Deviation from optimal solution : %g", max_deviation);
178 DEBUG1("Found x = %1.20f", x);
179 DEBUG1("Deviation from optimal solution (R_1): %1.20f",
180 lmm_variable_getvalue(R_1) - x);
181 DEBUG1("Deviation from optimal solution (R_2): %1.20f",
182 lmm_variable_getvalue(R_2) - (b - a + x));
183 DEBUG1("Deviation from optimal solution (R_3): %1.20f",
184 lmm_variable_getvalue(R_3) - x);
185 DEBUG1("Deviation from optimal solution (R_1_2_3): %1.20f",
186 lmm_variable_getvalue(R_1_2_3) - (a - x));
188 } else if (method == LAGRANGE_RENO) {
190 double max_deviation = 0.0;
194 x = dichotomy(diff_lagrange_test_1, 0, a, 1e-8);
203 MAX(max_deviation, fabs(lmm_variable_getvalue(R_1) - x));
205 MAX(max_deviation, fabs(lmm_variable_getvalue(R_3) - x));
207 MAX(max_deviation, fabs(lmm_variable_getvalue(R_2) - (b - a + x)));
209 MAX(max_deviation, fabs(lmm_variable_getvalue(R_1_2_3) - (a - x)));
211 if (max_deviation > 1e-8) {
212 DEBUG1("Max Deviation from optimal solution : %g", max_deviation);
213 DEBUG1("Found x = %1.20f", x);
214 DEBUG1("Deviation from optimal solution (R_1): %1.20f",
215 lmm_variable_getvalue(R_1) - x);
216 DEBUG1("Deviation from optimal solution (R_2): %1.20f",
217 lmm_variable_getvalue(R_2) - (b - a + x));
218 DEBUG1("Deviation from optimal solution (R_3): %1.20f",
219 lmm_variable_getvalue(R_3) - x);
220 DEBUG1("Deviation from optimal solution (R_1_2_3): %1.20f",
221 lmm_variable_getvalue(R_1_2_3) - (a - x));
224 xbt_assert0(0, "Invalid method");
232 lmm_system_free(Sys);
235 void test2(method_t method);
236 void test2(method_t method)
238 lmm_system_t Sys = NULL;
239 lmm_constraint_t CPU1 = NULL;
240 lmm_constraint_t CPU2 = NULL;
242 lmm_variable_t T1 = NULL;
243 lmm_variable_t T2 = NULL;
246 if (method == LAGRANGE_VEGAS) {
247 //set default functions for TCP Vegas
248 lmm_set_default_protocol_function(func_vegas_fpi);
249 } else if (method == LAGRANGE_RENO) {
250 //set default functions for TCP Reno
251 lmm_set_default_protocol_function(func_reno_fpi);
254 Sys = lmm_system_new();
255 CPU1 = lmm_constraint_new(Sys, (void *) "CPU1", 200.0);
256 CPU2 = lmm_constraint_new(Sys, (void *) "CPU2", 100.0);
258 T1 = lmm_variable_new(Sys, (void *) "T1", 1.0, -1.0, 1);
259 T2 = lmm_variable_new(Sys, (void *) "T2", 1.0, -1.0, 1);
261 lmm_update_variable_latency(Sys, T1, 1.0);
262 lmm_update_variable_latency(Sys, T2, 1.0);
265 lmm_expand(Sys, CPU1, T1, 1.0);
266 lmm_expand(Sys, CPU2, T2, 1.0);
270 if (method == MAXMIN) {
273 } else if (method == SDP) {
276 } else if (method == LAGRANGE_VEGAS) {
278 } else if (method == LAGRANGE_RENO) {
281 xbt_assert0(0, "Invalid method");
287 lmm_system_free(Sys);
292 void test3(method_t method);
293 void test3(method_t method)
303 lmm_system_t Sys = NULL;
304 lmm_constraint_t *tmp_cnst = NULL;
305 lmm_variable_t *tmp_var = NULL;
309 /*array to add the the constraints of fictiv variables */
310 double B[15] = { 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
315 A = (double **) calloc(links + 5, sizeof(double));
317 for (i = 0; i < links + 5; i++) {
318 A[i] = (double *) calloc(flows + 5, sizeof(double));
320 for (j = 0; j < flows + 5; j++) {
323 if (i >= links || j >= flows) {
329 /*matrix that store the constraints/topollogy */
331 {{0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
332 {0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0},
333 {0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0},
334 {0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0},
335 {1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0},
336 {1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0},
337 {1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0},
338 {0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0},
339 {0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0},
340 {0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0},
342 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0},
343 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0},
344 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0},
345 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0},
346 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}
399 if (method == LAGRANGE_VEGAS) {
400 lmm_set_default_protocol_function(func_vegas_fpi);
401 } else if (method == LAGRANGE_RENO) {
402 lmm_set_default_protocol_function(func_reno_fpi);
405 Sys = lmm_system_new();
409 tmp_name = (char **) calloc(31, sizeof(char *));
410 for (i = 0; i < 31; i++) {
411 tmp_name[i] = (char *) calloc(10, sizeof(char));
415 * Creates the constraints
417 tmp_cnst = calloc(15, sizeof(lmm_constraint_t));
418 for (i = 0; i < 15; i++) {
419 sprintf(tmp_name[i], "C_%03d", i);
420 tmp_cnst[i] = lmm_constraint_new(Sys, (void *) tmp_name[i], B[i]);
425 * Creates the variables
427 tmp_var = calloc(16, sizeof(lmm_variable_t));
428 for (j = 0; j < 16; j++) {
429 sprintf(tmp_name[i + j], "X_%03d", j);
431 lmm_variable_new(Sys, (void *) tmp_name[i + j], 1.0, -1.0, 15);
432 lmm_update_variable_latency(Sys, tmp_var[j], 1.0);
436 * Link constraints and variables
438 for (i = 0; i < 15; i++) {
439 for (j = 0; j < 16; j++) {
441 lmm_expand(Sys, tmp_cnst[i], tmp_var[j], 1.0);
448 if (method == MAXMIN) {
451 } else if (method == SDP) {
454 } else if (method == LAGRANGE_VEGAS) {
456 } else if (method == LAGRANGE_RENO) {
459 xbt_assert0(0, "Invalid method");
462 for (j = 0; j < 16; j++) {
463 PRINT_VAR(tmp_var[j]);
469 lmm_system_free(Sys);
476 int main(int argc, char **argv)
478 xbt_init(&argc, argv);
481 DEBUG0("**************************** ");
482 DEBUG0("***** ***** ");
483 DEBUG0("***** TEST 1 ***** ");
484 DEBUG0("***** ***** ");
485 DEBUG0("**************************** ");
488 DEBUG0("***** Test 1 (Max-Min) ***** ");
491 DEBUG0("***** Test 1 (SDP) ***** ");
494 DEBUG0("***** Test 1 (Lagrange - Vegas) ***** ");
495 test1(LAGRANGE_VEGAS);
496 DEBUG0("***** Test 1 (Lagrange - Reno) ***** ");
497 test1(LAGRANGE_RENO);
500 DEBUG0("**************************** ");
501 DEBUG0("***** ***** ");
502 DEBUG0("***** TEST 2 ***** ");
503 DEBUG0("***** ***** ");
504 DEBUG0("**************************** ");
507 DEBUG0("***** Test 2 (Max-Min) ***** ");
510 DEBUG0("***** Test 2 (SDP) ***** ");
513 DEBUG0("***** Test 2 (Lagrange - Vegas) ***** ");
514 test2(LAGRANGE_VEGAS);
515 DEBUG0("***** Test 2 (Lagrange - Reno) ***** ");
516 test2(LAGRANGE_RENO);
520 DEBUG0("**************************** ");
521 DEBUG0("***** ***** ");
522 DEBUG0("***** TEST 3 ***** ");
523 DEBUG0("***** ***** ");
524 DEBUG0("**************************** ");
527 DEBUG0("***** Test 3 (Max-Min) ***** ");
530 DEBUG0("***** Test 3 (SDP) ***** ");
533 DEBUG0("***** Test 3 (Lagrange - Vegas) ***** ");
534 test3(LAGRANGE_VEGAS);
535 DEBUG0("***** Test 3 (Lagrange - Reno) ***** ");
536 test3(LAGRANGE_RENO);