1 /* A few crash tests for the maxmin library */
3 /* Copyright (c) 2004-2020. The SimGrid Team. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "src/kernel/lmm/maxmin.hpp"
9 #include "simgrid/s4u/Engine.hpp"
10 #include "xbt/module.h"
11 #include "xbt/random.hpp"
12 #include "xbt/sysdep.h" /* time manipulation for benchmarking */
13 #include "xbt/xbt_os_time.h"
20 static double test(int nb_cnst, int nb_var, int nb_elem, unsigned int pw_base_limit, unsigned int pw_max_limit,
21 double rate_no_limit, int max_share, int mode)
23 auto* cnst = new simgrid::kernel::lmm::Constraint*[nb_cnst];
24 auto* var = new simgrid::kernel::lmm::Variable*[nb_var];
25 auto* used = new int[nb_cnst];
27 /* We cannot activate the selective update as we pass nullptr as an Action when creating the variables */
28 auto* Sys = new simgrid::kernel::lmm::System(false);
30 for (int i = 0; i < nb_cnst; i++) {
31 cnst[i] = Sys->constraint_new(nullptr, simgrid::xbt::random::uniform_real(0.0, 10.0));
33 if (rate_no_limit > simgrid::xbt::random::uniform_real(0.0, 1.0)) {
34 // Look at what happens when there is no concurrency limit
37 // Badly logarithmically random concurrency limit in [2^pw_base_limit+1,2^pw_base_limit+2^pw_max_limit]
38 l = (1 << pw_base_limit) + (1 << simgrid::xbt::random::uniform_int(0, pw_max_limit - 1));
40 cnst[i]->set_concurrency_limit(l);
43 for (int i = 0; i < nb_var; i++) {
44 var[i] = Sys->variable_new(nullptr, 1.0, -1.0, nb_elem);
45 //Have a few variables with a concurrency share of two (e.g. cross-traffic in some cases)
46 short concurrency_share = 1 + static_cast<short>(simgrid::xbt::random::uniform_int(0, max_share - 1));
47 var[i]->set_concurrency_share(concurrency_share);
49 for (int j = 0; j < nb_cnst; j++)
51 for (int j = 0; j < nb_elem; j++) {
54 k = simgrid::xbt::random::uniform_int(0, nb_cnst - 1);
55 } while (used[k] >= concurrency_share);
56 Sys->expand(cnst[k], var[i], simgrid::xbt::random::uniform_real(0.0, 1.5));
57 Sys->expand_add(cnst[k], var[i], simgrid::xbt::random::uniform_real(0.0, 1.5));
62 fprintf(stderr, "Starting to solve(%i)\n", simgrid::xbt::random::uniform_int(0, 999));
63 double date = xbt_os_time();
65 date = (xbt_os_time() - date) * 1e6;
68 fprintf(stderr,"Max concurrency:\n");
70 for (int i = 0; i < nb_cnst; i++) {
71 int j = cnst[i]->get_concurrency_maximum();
72 int k = cnst[i]->get_concurrency_limit();
73 xbt_assert(k<0 || j<=k);
76 fprintf(stderr,"(%i):%i/%i ",i,j,k);
77 cnst[i]->reset_concurrency_maximum();
78 xbt_assert(not cnst[i]->get_concurrency_maximum());
82 fprintf(stderr,"\nTotal maximum concurrency is %i\n",l);
87 for (int i = 0; i < nb_var; i++)
88 Sys->variable_free(var[i]);
97 constexpr std::array<std::array<unsigned int, 4>, 4> TestClasses{{
98 // Nbcnst Nbvar Baselimit Maxlimit
99 {{10, 10, 1, 2}}, // small
100 {{100, 100, 3, 6}}, // medium
101 {{2000, 2000, 5, 8}}, // big
102 {{20000, 20000, 7, 10}} // huge
105 int main(int argc, char **argv)
107 simgrid::s4u::Engine e(&argc, argv);
109 double rate_no_limit = 0.2;
110 double acc_date = 0.0;
111 double acc_date2 = 0.0;
115 fprintf(stderr, "Syntax: <small|medium|big|huge> <count> [test|debug|perf]\n");
120 if (not strcmp(argv[1], "small"))
122 else if (not strcmp(argv[1], "medium"))
124 else if (not strcmp(argv[1], "big"))
126 else if (not strcmp(argv[1], "huge"))
129 fprintf(stderr, "Unknown class \"%s\", aborting!\n",argv[1]);
134 int testcount=atoi(argv[2]);
136 //Show me everything (debug or performance)!
138 if(argc>=4 && strcmp(argv[3],"test")==0)
140 if(argc>=4 && strcmp(argv[3],"debug")==0)
142 if(argc>=4 && strcmp(argv[3],"perf")==0)
146 xbt_log_control_set("surf/maxmin.threshold:DEBUG surf/maxmin.fmt:\'[%r]: [%c/%p] %m%n\' "
147 "surf.threshold:DEBUG surf.fmt:\'[%r]: [%c/%p] %m%n\' ");
150 xbt_log_control_set("surf/maxmin.threshold:DEBUG surf.threshold:DEBUG");
152 unsigned int nb_cnst= TestClasses[testclass][0];
153 unsigned int nb_var= TestClasses[testclass][1];
154 unsigned int pw_base_limit= TestClasses[testclass][2];
155 unsigned int pw_max_limit= TestClasses[testclass][3];
156 unsigned int max_share = 2; // 1<<(pw_base_limit/2+1)
158 //If you want to test concurrency, you need nb_elem >> 2^pw_base_limit:
159 unsigned int nb_elem= (1<<pw_base_limit)+(1<<(8*pw_max_limit/10));
160 //Otherwise, just set it to a constant value (and set rate_no_limit to 1.0):
163 for(int i=0;i<testcount;i++){
164 simgrid::xbt::random::set_mersenne_seed(i + 1);
165 fprintf(stderr, "Starting %i: (%i)\n", i, simgrid::xbt::random::uniform_int(0, 999));
166 double date = test(nb_cnst, nb_var, nb_elem, pw_base_limit, pw_max_limit, rate_no_limit, max_share, mode);
168 acc_date2+=date*date;
171 double mean_date = acc_date / static_cast<double>(testcount);
172 double stdev_date = sqrt(acc_date2 / static_cast<double>(testcount) - mean_date * mean_date);
174 fprintf(stderr, "%ix One shot execution time for a total of %u constraints, "
175 "%u variables with %u active constraint each, concurrency in [%i,%i] and max concurrency share %u\n",
176 testcount, nb_cnst, nb_var, nb_elem, (1 << pw_base_limit), (1 << pw_base_limit) + (1 << pw_max_limit),
179 fprintf(stderr, "Execution time: %g +- %g microseconds \n",mean_date, stdev_date);