/** * \brief Returns the bandwidth of the route between two workstations, * i.e. the minimum link bandwidth of all between the workstations. * * \param src the first workstation * \param dst the second workstation * \return the bandwidth of the route between the two workstations (in bytes/second) * \see SD_route_get_latency() */ double SD_route_get_bandwidth(sg_host_t src, sg_host_t dst) { double min_bandwidth = -1.0; std::vector<Link*> route; src->routeTo(dst, &route, nullptr); for (auto link : route) { double bandwidth = sg_link_bandwidth(link); if (bandwidth < min_bandwidth || min_bandwidth < 0.0) min_bandwidth = bandwidth; } return min_bandwidth; }
/** * \brief Returns the bandwidth of the route between two workstations, * i.e. the minimum link bandwidth of all between the workstations. * * \param src the first workstation * \param dst the second workstation * \return the bandwidth of the route between the two workstations (in bytes/second) * \see SD_route_get_latency() */ double SD_route_get_bandwidth(sg_host_t src, sg_host_t dst) { double min_bandwidth = -1.0; std::vector<Link*> *route = new std::vector<Link*>(); routing_platf->getRouteAndLatency(src->pimpl_netcard, dst->pimpl_netcard, route, NULL); for (auto link : *route) { double bandwidth = sg_link_bandwidth(link); if (bandwidth < min_bandwidth || min_bandwidth == -1.0) min_bandwidth = bandwidth; } delete route; return min_bandwidth; }
int main(int argc, char **argv) { const char *user_data = "some user_data"; /* initialization of SD */ SD_init(&argc, argv); /* creation of the environment */ SD_create_environment(argv[1]); SD_link_t *links = sg_link_list(); int count = sg_link_count(); XBT_INFO("Link count: %d", count); qsort((void *)links, count, sizeof(SD_link_t), cmp_link); for (int i=0; i < count; i++){ XBT_INFO("%s: latency = %.5f, bandwidth = %f", sg_link_name(links[i]), sg_link_latency(links[i]), sg_link_bandwidth(links[i])); sg_link_data_set(links[i], (void*) user_data); xbt_assert(!strcmp(user_data, (const char*)sg_link_data(links[i])),"User data was corrupted."); } xbt_free(links); return 0; }
int main(int argc, char **argv) { sg_host_t host_list[2]; double computation_amount[2]; double communication_amount[4] = { 0 }; /* initialization of SD */ SD_init(&argc, argv); xbt_assert(argc > 1, "Usage: %s platform_file\n\nExample: %s two_clusters.xml", argv[0], argv[0]); SD_create_environment(argv[1]); /* test the estimation functions */ const sg_host_t *hosts = sg_host_list(); sg_host_t h1 = hosts[0]; sg_host_t h2 = hosts[1]; const char *name1 = sg_host_get_name(h1); const char *name2 = sg_host_get_name(h2); double comp_amount1 = 2000000; double comp_amount2 = 1000000; double comm_amount12 = 2000000; double comm_amount21 = 3000000; XBT_INFO("Computation time for %f flops on %s: %f", comp_amount1, name1, comp_amount1/sg_host_speed(h1)); XBT_INFO("Computation time for %f flops on %s: %f", comp_amount2, name2, comp_amount2/sg_host_speed(h2)); XBT_INFO("Route between %s and %s:", name1, name2); SD_link_t *route = SD_route_get_list(h1, h2); int route_size = SD_route_get_size(h1, h2); for (int i = 0; i < route_size; i++) XBT_INFO(" Link %s: latency = %f, bandwidth = %f", sg_link_name(route[i]), sg_link_latency(route[i]), sg_link_bandwidth(route[i])); xbt_free(route); XBT_INFO("Route latency = %f, route bandwidth = %f", SD_route_get_latency(h1, h2), SD_route_get_bandwidth(h1, h2)); XBT_INFO("Communication time for %f bytes between %s and %s: %f", comm_amount12, name1, name2, SD_route_get_latency(h1, h2) + comm_amount12 / SD_route_get_bandwidth(h1, h2)); XBT_INFO("Communication time for %f bytes between %s and %s: %f", comm_amount21, name2, name1, SD_route_get_latency(h2, h1) + comm_amount21 / SD_route_get_bandwidth(h2, h1)); /* creation of the tasks and their dependencies */ SD_task_t taskA = SD_task_create("Task A", NULL, 10.0); SD_task_t taskB = SD_task_create("Task B", NULL, 40.0); SD_task_t taskC = SD_task_create("Task C", NULL, 30.0); SD_task_t taskD = SD_task_create("Task D", NULL, 60.0); /* try to attach and retrieve user data to a task */ SD_task_set_data(taskA, static_cast<void*>(&comp_amount1)); if (fabs(comp_amount1 - (*(static_cast<double*>(SD_task_get_data(taskA))))) > 1e-12) XBT_ERROR("User data was corrupted by a simple set/get"); SD_task_dependency_add(NULL, NULL, taskB, taskA); SD_task_dependency_add(NULL, NULL, taskC, taskA); SD_task_dependency_add(NULL, NULL, taskD, taskB); SD_task_dependency_add(NULL, NULL, taskD, taskC); SD_task_dependency_add(NULL, NULL, taskB, taskC); try { SD_task_dependency_add(NULL, NULL, taskA, taskA); /* shouldn't work and must raise an exception */ xbt_die("Hey, I can add a dependency between Task A and Task A!"); } catch (xbt_ex& ex) { if (ex.category != arg_error) throw; /* this is a serious error */ } try { SD_task_dependency_add(NULL, NULL, taskB, taskA); /* shouldn't work and must raise an exception */ xbt_die("Oh oh, I can add an already existing dependency!"); } catch (xbt_ex& ex) { if (ex.category != arg_error) throw; } try { SD_task_dependency_remove(taskA, taskC); /* shouldn't work and must raise an exception */ xbt_die("Dude, I can remove an unknown dependency!"); } catch (xbt_ex& ex) { if (ex.category != arg_error) throw; } try { SD_task_dependency_remove(taskC, taskC); /* shouldn't work and must raise an exception */ xbt_die("Wow, I can remove a dependency between Task C and itself!"); } catch (xbt_ex& ex) { if (ex.category != arg_error) throw; } /* if everything is ok, no exception is forwarded or rethrown by main() */ /* watch points */ SD_task_watch(taskD, SD_DONE); SD_task_watch(taskB, SD_DONE); SD_task_unwatch(taskD, SD_DONE); /* scheduling parameters */ host_list[0] = h1; host_list[1] = h2; computation_amount[0] = comp_amount1; computation_amount[1] = comp_amount2; communication_amount[1] = comm_amount12; communication_amount[2] = comm_amount21; /* estimated time */ SD_task_t task = taskD; XBT_INFO("Estimated time for '%s': %f", SD_task_get_name(task), SD_task_get_execution_time(task, 2, host_list, computation_amount, communication_amount)); SD_task_schedule(taskA, 2, host_list, computation_amount, communication_amount, -1); SD_task_schedule(taskB, 2, host_list, computation_amount, communication_amount, -1); SD_task_schedule(taskC, 2, host_list, computation_amount, communication_amount, -1); SD_task_schedule(taskD, 2, host_list, computation_amount, communication_amount, -1); std::set<SD_task_t> *changed_tasks = simgrid::sd::simulate(-1.0); for (auto task: *changed_tasks){ XBT_INFO("Task '%s' start time: %f, finish time: %f", SD_task_get_name(task), SD_task_get_start_time(task), SD_task_get_finish_time(task)); } XBT_DEBUG("Destroying tasks..."); SD_task_destroy(taskA); SD_task_destroy(taskB); SD_task_destroy(taskC); SD_task_destroy(taskD); XBT_DEBUG("Tasks destroyed. Exiting SimDag..."); SD_exit(); return 0; }