/* A few tests for the maxmin library */
-/* Copyright (c) 2007-2018. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
/* ==l1== L2 ==L3== */
/* ------ */
-enum method_t { MAXMIN, LAGRANGE_RENO, LAGRANGE_VEGAS };
+static lmm::System* new_system()
+{
+ return lmm::make_new_maxmin_system(false);
+}
-static lmm::System* new_system(method_t method)
+double a_test_1 = 0;
+double b_test_1 = 0;
+static double diff_lagrange_test_1(double x)
{
- /* selective update would need real actions instead of NULL as a first parameter to the variable constructor */
- switch (method) {
- case MAXMIN:
- return lmm::make_new_maxmin_system(false);
- case LAGRANGE_VEGAS:
- case LAGRANGE_RENO:
- return lmm::make_new_lagrange_system(false);
- default:
- xbt_die("Invalid method");
- }
+ return -(3 / (1 + 3 * x * x / 2) - 3 / (2 * (3 * (a_test_1 - x) * (a_test_1 - x) / 2 + 1)) +
+ 3 / (2 * (3 * (b_test_1 - a_test_1 + x) * (b_test_1 - a_test_1 + x) / 2 + 1)));
}
-static double dichotomy(double func(double), double min, double max, double min_error)
+static double dichotomy(double min, double max, double min_error)
{
double overall_error = 2 * min_error;
- double min_func = func(min);
- double max_func = func(max);
+ double min_func = diff_lagrange_test_1(min);
+ double max_func = diff_lagrange_test_1(max);
if (min_func > 0 && max_func > 0)
return min - 1.0;
if (fabs(min - middle) < 1e-12 || fabs(max - middle) < 1e-12) {
break;
}
- double middle_func = func(middle);
+ double middle_func = diff_lagrange_test_1(middle);
SHOW_EXPR(middle);
SHOW_EXPR(middle_func);
return ((min + max) / 2.0);
}
-double a_test_1 = 0;
-double b_test_1 = 0;
-static double diff_lagrange_test_1(double x)
-{
- return -(3 / (1 + 3 * x * x / 2) - 3 / (2 * (3 * (a_test_1 - x) * (a_test_1 - x) / 2 + 1)) +
- 3 / (2 * (3 * (b_test_1 - a_test_1 + x) * (b_test_1 - a_test_1 + x) / 2 + 1)));
-}
-
-static void test1(method_t method)
+static void test1()
{
double a = 1.0;
double b = 10.0;
- if (method == LAGRANGE_VEGAS)
- lmm::Lagrange::set_default_protocol_function(lmm::func_vegas_f, lmm::func_vegas_fp, lmm::func_vegas_fpi);
- else if (method == LAGRANGE_RENO)
- lmm::Lagrange::set_default_protocol_function(lmm::func_reno_f, lmm::func_reno_fp, lmm::func_reno_fpi);
-
- lmm::System* Sys = new_system(method);
+ lmm::System* Sys = new_system();
lmm::Constraint* L1 = Sys->constraint_new(nullptr, a);
lmm::Constraint* L2 = Sys->constraint_new(nullptr, b);
lmm::Constraint* L3 = Sys->constraint_new(nullptr, a);
Sys->expand(L2, R_2, 1.0);
Sys->expand(L3, R_3, 1.0);
- if (method == MAXMIN) {
- Sys->solve();
- } else {
- double x;
- if (method == LAGRANGE_VEGAS) {
- x = 3 * a / 4 - 3 * b / 8 + sqrt(9 * b * b + 4 * a * a - 4 * a * b) / 8;
- /* Computed with mupad and D_f=1.0 */
- if (x > a) {
- x = a;
- }
- if (x < 0) {
- x = 0;
- }
- } else if (method == LAGRANGE_RENO) {
- a_test_1 = a;
- b_test_1 = b;
- x = dichotomy(diff_lagrange_test_1, 0, a, 1e-13);
-
- if (x < 0)
- x = 0;
- if (x > a)
- x = a;
- } else {
- xbt_die( "Invalid method");
- }
-
- Sys->solve();
-
- double max_deviation = 0.0;
- max_deviation = std::max(max_deviation, fabs(R_1->get_value() - x));
- max_deviation = std::max(max_deviation, fabs(R_3->get_value() - x));
- max_deviation = std::max(max_deviation, fabs(R_2->get_value() - (b - a + x)));
- max_deviation = std::max(max_deviation, fabs(R_1_2_3->get_value() - (a - x)));
-
- if (max_deviation > 0.00001) { // Legacy value used in lagrange.c
- XBT_WARN("Max Deviation from optimal solution : %g", max_deviation);
- XBT_WARN("Found x = %1.20f", x);
- XBT_WARN("Deviation from optimal solution (R_1 = %g): %1.20f", x, R_1->get_value() - x);
- XBT_WARN("Deviation from optimal solution (R_2 = %g): %1.20f", b - a + x, R_2->get_value() - (b - a + x));
- XBT_WARN("Deviation from optimal solution (R_3 = %g): %1.20f", x, R_3->get_value() - x);
- XBT_WARN("Deviation from optimal solution (R_1_2_3 = %g): %1.20f", a - x, R_1_2_3->get_value() - (a - x));
- }
- }
+ Sys->solve();
PRINT_VAR(R_1_2_3);
PRINT_VAR(R_1);
delete Sys;
}
-static void test2(method_t method)
+static void test2()
{
- if (method == LAGRANGE_VEGAS)
- lmm::Lagrange::set_default_protocol_function(lmm::func_vegas_f, lmm::func_vegas_fp, lmm::func_vegas_fpi);
- if (method == LAGRANGE_RENO)
- lmm::Lagrange::set_default_protocol_function(lmm::func_reno_f, lmm::func_reno_fp, lmm::func_reno_fpi);
-
- lmm::System* Sys = new_system(method);
+ lmm::System* Sys = new_system();
lmm::Constraint* CPU1 = Sys->constraint_new(nullptr, 200.0);
lmm::Constraint* CPU2 = Sys->constraint_new(nullptr, 100.0);
delete Sys;
}
-static void test3(method_t method)
+static void test3()
{
int flows = 11;
int links = 10;
A[13][14] = 1.0;
A[14][15] = 1.0;
- if (method == LAGRANGE_VEGAS)
- lmm::Lagrange::set_default_protocol_function(lmm::func_vegas_f, lmm::func_vegas_fp, lmm::func_vegas_fpi);
- if (method == LAGRANGE_RENO)
- lmm::Lagrange::set_default_protocol_function(lmm::func_reno_f, lmm::func_reno_fp, lmm::func_reno_fpi);
-
- lmm::System* Sys = new_system(method);
+ lmm::System* Sys = new_system();
/* Creates the constraints */
lmm::Constraint** tmp_cnst = new lmm::Constraint*[15];
int main(int argc, char** argv)
{
MSG_init(&argc, argv);
- XBT_INFO("***** Test 1 (Max-Min)");
- test1(MAXMIN);
- XBT_INFO("***** Test 1 (Lagrange - Vegas)");
- test1(LAGRANGE_VEGAS);
- XBT_INFO("***** Test 1 (Lagrange - Reno)");
- test1(LAGRANGE_RENO);
-
- XBT_INFO("***** Test 2 (Max-Min)");
- test2(MAXMIN);
- XBT_INFO("***** Test 2 (Lagrange - Vegas)");
- test2(LAGRANGE_VEGAS);
- XBT_INFO("***** Test 2 (Lagrange - Reno)");
- test2(LAGRANGE_RENO);
-
- XBT_INFO("***** Test 3 (Max-Min)");
- test3(MAXMIN);
- XBT_INFO("***** Test 3 (Lagrange - Vegas)");
- test3(LAGRANGE_VEGAS);
- XBT_INFO("***** Test 3 (Lagrange - Reno)");
- test3(LAGRANGE_RENO);
+ XBT_INFO("***** Test 1");
+ test1();
+
+ XBT_INFO("***** Test 2");
+ test2();
+
+ XBT_INFO("***** Test 3");
+ test3();
return 0;
}
