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"
20 XBT_LOG_NEW_DEFAULT_CATEGORY(surf_test,
21 "Messages specific for surf example");
23 #define PRINT_VAR(var) DEBUG1(#var " = %g",lmm_variable_getvalue(var));
24 #define SHOW_EXPR(expr) DEBUG1(#expr " = %g",expr);
28 /* ==l1== L2 ==L3== */
39 static double dichotomy(double func(double), double min, double max,
43 double min_func, max_func, middle_func;
45 double overall_error = 2 * min_error;
50 if ((min_func > 0 && max_func > 0))
52 if ((min_func < 0 && max_func < 0))
54 if ((min_func > 0 && max_func < 0))
57 while (overall_error > min_error) {
58 if ((min_func > 0 && max_func > 0) ||
59 (min_func < 0 && max_func < 0) || (min_func > 0 && max_func < 0)) {
63 middle = (max + min) / 2.0;
64 if ((min == middle) || (max == middle)) {
67 middle_func = func(middle);
69 if (middle_func < 0) {
71 min_func = middle_func;
72 overall_error = max - middle_func;
73 } else if (middle_func > 0) {
75 max_func = middle_func;
76 overall_error = max - middle_func;
81 return ((min + max) / 2.0);
86 static double diff_lagrange_test_1(double x)
88 return -(3 / (1 + 3 * x * x / 2) -
89 3 / (2 * (3 * (a_test_1 - x) * (a_test_1 - x) / 2 + 1)) +
91 (3 * (b_test_1 - a_test_1 + x) *
92 (b_test_1 - a_test_1 + x) / 2 + 1)));
95 void test1(method_t method);
96 void test1(method_t method)
98 lmm_system_t Sys = NULL;
99 lmm_constraint_t L1 = NULL;
100 lmm_constraint_t L2 = NULL;
101 lmm_constraint_t L3 = NULL;
103 lmm_variable_t R_1_2_3 = NULL;
104 lmm_variable_t R_1 = NULL;
105 lmm_variable_t R_2 = NULL;
106 lmm_variable_t R_3 = NULL;
108 double a = 1.0, b = 10.0;
110 if (method == LAGRANGE_VEGAS)
111 lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
113 else if (method == LAGRANGE_RENO)
114 lmm_set_default_protocol_function(func_reno_f, func_reno_fpi,
117 Sys = lmm_system_new();
118 L1 = lmm_constraint_new(Sys, (void *) "L1", a);
119 L2 = lmm_constraint_new(Sys, (void *) "L2", b);
120 L3 = lmm_constraint_new(Sys, (void *) "L3", a);
122 R_1_2_3 = lmm_variable_new(Sys, (void *) "R 1->2->3", 1.0, -1.0, 3);
123 R_1 = lmm_variable_new(Sys, (void *) "R 1", 1.0, -1.0, 1);
124 R_2 = lmm_variable_new(Sys, (void *) "R 2", 1.0, -1.0, 1);
125 R_3 = lmm_variable_new(Sys, (void *) "R 3", 1.0, -1.0, 1);
127 lmm_update_variable_latency(Sys, R_1_2_3, 1.0);
128 lmm_update_variable_latency(Sys, R_1, 1.0);
129 lmm_update_variable_latency(Sys, R_2, 1.0);
130 lmm_update_variable_latency(Sys, R_3, 1.0);
132 lmm_expand(Sys, L1, R_1_2_3, 1.0);
133 lmm_expand(Sys, L2, R_1_2_3, 1.0);
134 lmm_expand(Sys, L3, R_1_2_3, 1.0);
136 lmm_expand(Sys, L1, R_1, 1.0);
138 lmm_expand(Sys, L2, R_2, 1.0);
140 lmm_expand(Sys, L3, R_3, 1.0);
143 if (method == MAXMIN) {
146 } else if (method == SDP) {
149 } else if (method == LAGRANGE_VEGAS) {
150 double x = 3 * a / 4 - 3 * b / 8 +
151 sqrt(9 * b * b + 4 * a * a - 4 * a * b) / 8;
152 /* Computed with mupad and D_f=1.0 */
153 double max_deviation = 0.0;
164 MAX(max_deviation, fabs(lmm_variable_getvalue(R_1) - x));
166 MAX(max_deviation, fabs(lmm_variable_getvalue(R_3) - x));
168 MAX(max_deviation, fabs(lmm_variable_getvalue(R_2) - (b - a + x)));
170 MAX(max_deviation, fabs(lmm_variable_getvalue(R_1_2_3) - (a - x)));
172 if (max_deviation > MAXMIN_PRECISION) {
173 WARN1("Max Deviation from optimal solution : %g", max_deviation);
174 WARN1("Found x = %1.20f", x);
175 WARN2("Deviation from optimal solution (R_1 = %g): %1.20f", x,
176 lmm_variable_getvalue(R_1) - x);
177 WARN2("Deviation from optimal solution (R_2 = %g): %1.20f",
178 b - a + x, lmm_variable_getvalue(R_2) - (b - a + x));
179 WARN2("Deviation from optimal solution (R_3 = %g): %1.20f", x,
180 lmm_variable_getvalue(R_3) - x);
181 WARN2("Deviation from optimal solution (R_1_2_3 = %g): %1.20f",
182 a - x, lmm_variable_getvalue(R_1_2_3) - (a - x));
184 } else if (method == LAGRANGE_RENO) {
186 double max_deviation = 0.0;
190 x = dichotomy(diff_lagrange_test_1, 0, a, 1e-8);
199 MAX(max_deviation, fabs(lmm_variable_getvalue(R_1) - x));
201 MAX(max_deviation, fabs(lmm_variable_getvalue(R_3) - x));
203 MAX(max_deviation, fabs(lmm_variable_getvalue(R_2) - (b - a + x)));
205 MAX(max_deviation, fabs(lmm_variable_getvalue(R_1_2_3) - (a - x)));
207 if (max_deviation > MAXMIN_PRECISION) {
208 WARN1("Max Deviation from optimal solution : %g", max_deviation);
209 WARN1("Found x = %1.20f", x);
210 WARN2("Deviation from optimal solution (R_1 = %g): %1.20f", x,
211 lmm_variable_getvalue(R_1) - x);
212 WARN2("Deviation from optimal solution (R_2 = %g): %1.20f",
213 b - a + x, lmm_variable_getvalue(R_2) - (b - a + x));
214 WARN2("Deviation from optimal solution (R_3 = %g): %1.20f", x,
215 lmm_variable_getvalue(R_3) - x);
216 WARN2("Deviation from optimal solution (R_1_2_3 = %g): %1.20f",
217 a - x, lmm_variable_getvalue(R_1_2_3) - (a - x));
220 xbt_assert0(0, "Invalid method");
228 lmm_system_free(Sys);
231 void test2(method_t method);
232 void test2(method_t method)
234 lmm_system_t Sys = NULL;
235 lmm_constraint_t CPU1 = NULL;
236 lmm_constraint_t CPU2 = NULL;
238 lmm_variable_t T1 = NULL;
239 lmm_variable_t T2 = NULL;
242 if (method == LAGRANGE_VEGAS)
243 lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
245 else if (method == LAGRANGE_RENO)
246 lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
249 Sys = lmm_system_new();
250 CPU1 = lmm_constraint_new(Sys, (void *) "CPU1", 200.0);
251 CPU2 = lmm_constraint_new(Sys, (void *) "CPU2", 100.0);
253 T1 = lmm_variable_new(Sys, (void *) "T1", 1.0, -1.0, 1);
254 T2 = lmm_variable_new(Sys, (void *) "T2", 1.0, -1.0, 1);
256 lmm_update_variable_latency(Sys, T1, 1.0);
257 lmm_update_variable_latency(Sys, T2, 1.0);
260 lmm_expand(Sys, CPU1, T1, 1.0);
261 lmm_expand(Sys, CPU2, T2, 1.0);
265 if (method == MAXMIN) {
268 } else if (method == SDP) {
271 } else if (method == LAGRANGE_VEGAS) {
273 } else if (method == LAGRANGE_RENO) {
276 xbt_assert0(0, "Invalid method");
282 lmm_system_free(Sys);
287 void test3(method_t method);
288 void test3(method_t method)
298 lmm_system_t Sys = NULL;
299 lmm_constraint_t *tmp_cnst = NULL;
300 lmm_variable_t *tmp_var = NULL;
304 /*array to add the the constraints of fictiv variables */
305 double B[15] = { 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
310 /*A = xbt_new0(double*, links + 5);*/
311 A = xbt_new0(double*, links + 5);
313 for (i = 0; i < links + 5; i++) {
314 A[i] = xbt_new0(double, flows + 5);
315 for (j = 0; j < flows + 5; j++) {
318 if (i >= links || j >= flows) {
324 /*matrix that store the constraints/topollogy */
326 {{0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
327 {0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0},
328 {0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0},
329 {0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0},
330 {1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0},
331 {1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0},
332 {1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0},
333 {0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0},
334 {0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0},
335 {0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0},
337 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0},
338 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0},
339 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0},
340 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0},
341 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}
394 if (method == LAGRANGE_VEGAS)
395 lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
397 else if (method == LAGRANGE_RENO)
398 lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
401 Sys = lmm_system_new();
405 tmp_name = xbt_new0(char *,31);
408 * Creates the constraints
410 tmp_cnst = xbt_new0(lmm_constraint_t,15);
411 for (i = 0; i < 15; i++) {
412 tmp_name[i] = bprintf("C_%03d", i);
413 tmp_cnst[i] = lmm_constraint_new(Sys, (void *) tmp_name[i], B[i]);
418 * Creates the variables
420 tmp_var = xbt_new0(lmm_variable_t,16);
421 for (j = 0; j < 16; j++) {
422 tmp_name[i + j] = bprintf("X_%03d", j);
424 lmm_variable_new(Sys, (void *) tmp_name[i + j], 1.0, -1.0, 15);
425 lmm_update_variable_latency(Sys, tmp_var[j], 1.0);
429 * Link constraints and variables
431 for (i = 0; i < 15; i++) {
432 for (j = 0; j < 16; j++) {
434 lmm_expand(Sys, tmp_cnst[i], tmp_var[j], 1.0);
441 if (method == MAXMIN) {
444 } else if (method == SDP) {
447 } else if (method == LAGRANGE_VEGAS) {
449 } else if (method == LAGRANGE_RENO) {
452 xbt_assert0(0, "Invalid method");
455 for (j = 0; j < 16; j++) {
456 PRINT_VAR(tmp_var[j]);
462 lmm_system_free(Sys);
469 int main(int argc, char **argv)
471 xbt_init(&argc, argv);
473 INFO0("***** Test 1 (Max-Min)");
476 INFO0("***** Test 1 (SDP)");
479 INFO0("***** Test 1 (Lagrange - Vegas)");
480 test1(LAGRANGE_VEGAS);
481 INFO0("***** Test 1 (Lagrange - Reno)");
482 test1(LAGRANGE_RENO);
486 INFO0("***** Test 2 (Max-Min)");
489 INFO0("***** Test 2 (SDP)");
492 INFO0("***** Test 2 (Lagrange - Vegas)");
493 test2(LAGRANGE_VEGAS);
494 INFO0("***** Test 2 (Lagrange - Reno)");
495 test2(LAGRANGE_RENO);
498 INFO0("***** Test 3 (Max-Min)");
501 INFO0("***** Test 3 (SDP)");
504 INFO0("***** Test 3 (Lagrange - Vegas)");
505 test3(LAGRANGE_VEGAS);
506 INFO0("***** Test 3 (Lagrange - Reno)");
507 test3(LAGRANGE_RENO);