examples/c/cloud-capping/cloud-capping.c

   1 /* Copyright (c) 2007-2020. The SimGrid Team. All rights reserved.          */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "simgrid/actor.h"
   7 #include "simgrid/engine.h"
   8 #include "simgrid/exec.h"
   9 #include "simgrid/host.h"
  10 #include "simgrid/plugins/live_migration.h"
  11 #include "simgrid/vm.h"
  12
  13 #include "xbt/asserts.h"
  14 #include "xbt/log.h"
  15 #include "xbt/str.h"
  16
  17 XBT_LOG_NEW_DEFAULT_CATEGORY(cloud_capping, "Messages specific for this example");
  18
  19 static void worker_main(int argc, char* argv[])
  20 {
  21   xbt_assert(argc == 4);
  22   double computation_amount = xbt_str_parse_double(argv[1], "Invalid computation amount: %s");
  23   int use_bound             = xbt_str_parse_int(argv[2], "Second parameter (use_bound) should be 0 or 1 but is: %s");
  24   double bound              = xbt_str_parse_double(argv[3], "Invalid bound: %s");
  25
  26   double clock_sta = simgrid_get_clock();
  27
  28   sg_exec_t exec = sg_actor_exec_init(computation_amount);
  29   if (use_bound) {
  30     if (bound < 1e-12) /* close enough to 0 without any floating precision surprise */
  31       XBT_INFO("bound == 0 means no capping (i.e., unlimited).");
  32     sg_exec_set_bound(exec, bound);
  33   }
  34   sg_exec_wait(exec);
  35
  36   double clock_end     = simgrid_get_clock();
  37   double duration      = clock_end - clock_sta;
  38   double flops_per_sec = computation_amount / duration;
  39
  40   if (use_bound)
  41     XBT_INFO("bound to %f => duration %f (%f flops/s)", bound, duration, flops_per_sec);
  42   else
  43     XBT_INFO("not bound => duration %f (%f flops/s)", duration, flops_per_sec);
  44 }
  45
  46 static void launch_worker(sg_host_t host, const char* pr_name, double computation_amount, int use_bound, double bound)
  47 {
  48   char* argv1        = bprintf("%f", computation_amount);
  49   char* argv2        = bprintf("%d", use_bound);
  50   char* argv3        = bprintf("%f", bound);
  51   const char* argv[] = {pr_name, argv1, argv2, argv3, NULL};
  52
  53   sg_actor_t actor = sg_actor_init(pr_name, host);
  54   sg_actor_start(actor, worker_main, 4, argv);
  55
  56   free(argv1);
  57   free(argv2);
  58   free(argv3);
  59 }
  60
  61 static void worker_busy_loop(int argc, char* argv[])
  62 {
  63   xbt_assert(argc > 2);
  64   char* name              = argv[1];
  65   double speed            = xbt_str_parse_double(argv[2], "Invalid speed value");
  66   double exec_remain_prev = 1e11;
  67
  68   sg_exec_t exec = sg_actor_exec_async(exec_remain_prev);
  69   for (int i = 0; i < 10; i++) {
  70     if (speed > 0) {
  71       double new_bound = (speed / 10) * i;
  72       XBT_INFO("set bound of VM1 to %f", new_bound);
  73       sg_vm_set_bound(((sg_vm_t)sg_actor_get_host(sg_actor_self())), new_bound);
  74     }
  75     sg_actor_sleep_for(100);
  76     double exec_remain_now = sg_exec_get_remaining(exec);
  77     double flops_per_sec   = exec_remain_prev - exec_remain_now;
  78     XBT_INFO("%s@%s: %.0f flops/s", name, sg_host_get_name(sg_actor_get_host(sg_actor_self())), flops_per_sec / 100);
  79     exec_remain_prev = exec_remain_now;
  80     sg_actor_sleep_for(1);
  81   }
  82
  83   sg_exec_wait(exec);
  84 }
  85
  86 static void test_dynamic_change()
  87 {
  88   sg_host_t pm0 = sg_host_by_name("Fafard");
  89
  90   sg_vm_t vm0 = sg_vm_create_core(pm0, "VM0");
  91   sg_vm_t vm1 = sg_vm_create_core(pm0, "VM1");
  92   sg_vm_start(vm0);
  93   sg_vm_start(vm1);
  94
  95   int w0_argc           = 3;
  96   const char* w0_argv[] = {"worker0", "Task0", "-1.0", NULL};
  97   sg_actor_t w0         = sg_actor_init("worker0", (sg_host_t)vm0);
  98   sg_actor_start(w0, worker_busy_loop, w0_argc, w0_argv);
  99
 100   int w1_argc           = 3;
 101   char* speed           = bprintf("%f", sg_host_speed(pm0));
 102   const char* w1_argv[] = {"worker1", "Task1", speed, NULL};
 103
 104   sg_actor_t w1 = sg_actor_init("worker1", (sg_host_t)vm1);
 105   sg_actor_start(w1, worker_busy_loop, w1_argc, w1_argv);
 106
 107   sg_actor_sleep_for(3000); // let the tasks end
 108
 109   sg_vm_destroy(vm0);
 110   sg_vm_destroy(vm1);
 111   free(speed);
 112 }
 113
 114 static void test_one_task(sg_host_t hostA)
 115 {
 116   const double cpu_speed          = sg_host_speed(hostA);
 117   const double computation_amount = cpu_speed * 10;
 118   const char* hostA_name          = sg_host_get_name(hostA);
 119
 120   XBT_INFO("### Test: with/without sg_exec_set_bound");
 121
 122   XBT_INFO("### Test: no bound for Task1@%s", hostA_name);
 123   launch_worker(hostA, "worker0", computation_amount, 0, 0);
 124
 125   sg_actor_sleep_for(1000);
 126
 127   XBT_INFO("### Test: 50%% for Task1@%s", hostA_name);
 128   launch_worker(hostA, "worker0", computation_amount, 1, cpu_speed / 2);
 129
 130   sg_actor_sleep_for(1000);
 131
 132   XBT_INFO("### Test: 33%% for Task1@%s", hostA_name);
 133   launch_worker(hostA, "worker0", computation_amount, 1, cpu_speed / 3);
 134
 135   sg_actor_sleep_for(1000);
 136
 137   XBT_INFO("### Test: zero for Task1@%s (i.e., unlimited)", hostA_name);
 138   launch_worker(hostA, "worker0", computation_amount, 1, 0);
 139
 140   sg_actor_sleep_for(1000);
 141
 142   XBT_INFO("### Test: 200%% for Task1@%s (i.e., meaningless)", hostA_name);
 143   launch_worker(hostA, "worker0", computation_amount, 1, cpu_speed * 2);
 144
 145   sg_actor_sleep_for(1000);
 146 }
 147
 148 static void test_two_tasks(sg_host_t hostA, sg_host_t hostB)
 149 {
 150   const double cpu_speed = sg_host_speed(hostA);
 151   xbt_assert(cpu_speed == sg_host_speed(hostB));
 152   const double computation_amount = cpu_speed * 10;
 153   const char* hostA_name          = sg_host_get_name(hostA);
 154   const char* hostB_name          = sg_host_get_name(hostB);
 155
 156   XBT_INFO("### Test: no bound for Task1@%s, no bound for Task2@%s", hostA_name, hostB_name);
 157   launch_worker(hostA, "worker0", computation_amount, 0, 0);
 158   launch_worker(hostB, "worker1", computation_amount, 0, 0);
 159
 160   sg_actor_sleep_for(1000);
 161
 162   XBT_INFO("### Test: 0 for Task1@%s, 0 for Task2@%s (i.e., unlimited)", hostA_name, hostB_name);
 163   launch_worker(hostA, "worker0", computation_amount, 1, 0);
 164   launch_worker(hostB, "worker1", computation_amount, 1, 0);
 165
 166   sg_actor_sleep_for(1000);
 167
 168   XBT_INFO("### Test: 50%% for Task1@%s, 50%% for Task2@%s", hostA_name, hostB_name);
 169   launch_worker(hostA, "worker0", computation_amount, 1, cpu_speed / 2);
 170   launch_worker(hostB, "worker1", computation_amount, 1, cpu_speed / 2);
 171
 172   sg_actor_sleep_for(1000);
 173
 174   XBT_INFO("### Test: 25%% for Task1@%s, 25%% for Task2@%s", hostA_name, hostB_name);
 175   launch_worker(hostA, "worker0", computation_amount, 1, cpu_speed / 4);
 176   launch_worker(hostB, "worker1", computation_amount, 1, cpu_speed / 4);
 177
 178   sg_actor_sleep_for(1000);
 179
 180   XBT_INFO("### Test: 75%% for Task1@%s, 100%% for Task2@%s", hostA_name, hostB_name);
 181   launch_worker(hostA, "worker0", computation_amount, 1, cpu_speed * 0.75);
 182   launch_worker(hostB, "worker1", computation_amount, 1, cpu_speed);
 183
 184   sg_actor_sleep_for(1000);
 185
 186   XBT_INFO("### Test: no bound for Task1@%s, 25%% for Task2@%s", hostA_name, hostB_name);
 187   launch_worker(hostA, "worker0", computation_amount, 0, 0);
 188   launch_worker(hostB, "worker1", computation_amount, 1, cpu_speed / 4);
 189
 190   sg_actor_sleep_for(1000);
 191
 192   XBT_INFO("### Test: 75%% for Task1@%s, 25%% for Task2@%s", hostA_name, hostB_name);
 193   launch_worker(hostA, "worker0", computation_amount, 1, cpu_speed * 0.75);
 194   launch_worker(hostB, "worker1", computation_amount, 1, cpu_speed / 4);
 195
 196   sg_actor_sleep_for(1000);
 197 }
 198
 199 static void master_main(XBT_ATTRIB_UNUSED int argc, XBT_ATTRIB_UNUSED char* argv[])
 200 {
 201   sg_host_t pm0 = sg_host_by_name("Fafard");
 202   sg_host_t pm1 = sg_host_by_name("Fafard");
 203
 204   XBT_INFO("# 1. Put a single task on a PM. ");
 205   test_one_task(pm0);
 206   XBT_INFO(" ");
 207
 208   XBT_INFO("# 2. Put two tasks on a PM.");
 209   test_two_tasks(pm0, pm0);
 210   XBT_INFO(" ");
 211
 212   sg_vm_t vm0 = sg_vm_create_core(pm0, "VM0");
 213   sg_vm_start(vm0);
 214
 215   XBT_INFO("# 3. Put a single task on a VM. ");
 216   test_one_task((sg_host_t)vm0);
 217   XBT_INFO(" ");
 218
 219   XBT_INFO("# 4. Put two tasks on a VM.");
 220   test_two_tasks((sg_host_t)vm0, (sg_host_t)vm0);
 221   XBT_INFO(" ");
 222
 223   sg_vm_destroy(vm0);
 224
 225   vm0 = sg_vm_create_core(pm0, "VM0");
 226   sg_vm_start(vm0);
 227
 228   XBT_INFO("# 6. Put a task on a PM and a task on a VM.");
 229   test_two_tasks(pm0, (sg_host_t)vm0);
 230   XBT_INFO(" ");
 231
 232   sg_vm_destroy(vm0);
 233
 234   vm0              = sg_vm_create_core(pm0, "VM0");
 235   double cpu_speed = sg_host_speed(pm0);
 236   sg_vm_set_bound(vm0, cpu_speed / 10);
 237   sg_vm_start(vm0);
 238
 239   XBT_INFO("# 7. Put a single task on the VM capped by 10%%.");
 240   test_one_task((sg_host_t)vm0);
 241   XBT_INFO(" ");
 242
 243   XBT_INFO("# 8. Put two tasks on the VM capped by 10%%.");
 244   test_two_tasks((sg_host_t)vm0, (sg_host_t)vm0);
 245   XBT_INFO(" ");
 246
 247   XBT_INFO("# 9. Put a task on a PM and a task on the VM capped by 10%%.");
 248   test_two_tasks(pm0, (sg_host_t)vm0);
 249   XBT_INFO(" ");
 250
 251   sg_vm_destroy(vm0);
 252
 253   vm0 = sg_vm_create_core(pm0, "VM0");
 254
 255   sg_vm_set_ramsize(vm0, 1e9); // 1GB
 256   sg_vm_start(vm0);
 257
 258   cpu_speed = sg_host_speed(pm0);
 259   sg_vm_start(vm0);
 260
 261   XBT_INFO("# 10. Test migration");
 262   const double computation_amount = cpu_speed * 10;
 263
 264   XBT_INFO("# 10. (a) Put a task on a VM without any bound.");
 265   launch_worker((sg_host_t)vm0, "worker0", computation_amount, 0, 0);
 266   sg_actor_sleep_for(1000);
 267   XBT_INFO(" ");
 268
 269   XBT_INFO("# 10. (b) set 10%% bound to the VM, and then put a task on the VM.");
 270   sg_vm_set_bound(vm0, cpu_speed / 10);
 271   launch_worker((sg_host_t)vm0, "worker0", computation_amount, 0, 0);
 272   sg_actor_sleep_for(1000);
 273   XBT_INFO(" ");
 274
 275   XBT_INFO("# 10. (c) migrate");
 276   sg_vm_migrate(vm0, pm1);
 277   XBT_INFO(" ");
 278
 279   XBT_INFO("# 10. (d) Put a task again on the VM.");
 280   launch_worker((sg_host_t)vm0, "worker0", computation_amount, 0, 0);
 281   sg_actor_sleep_for(1000);
 282   XBT_INFO(" ");
 283
 284   sg_vm_destroy(vm0);
 285
 286   XBT_INFO("# 11. Change a bound dynamically.");
 287   test_dynamic_change();
 288 }
 289
 290 int main(int argc, char* argv[])
 291 {
 292   /* Get the arguments */
 293   simgrid_init(&argc, argv);
 294   sg_vm_live_migration_plugin_init();
 295
 296   /* load the platform file */
 297   xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s ../platforms/small_platform.xml\n", argv[0], argv[0]);
 298
 299   simgrid_load_platform(argv[1]);
 300
 301   sg_actor_t actor = sg_actor_init("master_", sg_host_by_name("Fafard"));
 302   sg_actor_start(actor, master_main, 0, NULL);
 303
 304   simgrid_run();
 305   XBT_INFO("Bye (simulation time %g)", simgrid_get_clock());
 306
 307   return 0;
 308 }