static int execute_load_test(int argc, char* argv[]) { msg_host_t host = MSG_host_by_name("MyHost1"); XBT_INFO("Initial peak speed: %.0E flop/s; number of flops computed so far: %.0E (should be 0)", MSG_host_get_speed(host), sg_host_get_computed_flops(host)); double start = MSG_get_clock(); XBT_INFO("Sleep for 10 seconds"); MSG_process_sleep(10); XBT_INFO("Done sleeping %.2fs; peak speed: %.0E flop/s; number of flops computed so far: %.0E (nothing should have " "changed)", MSG_get_clock() - start, MSG_host_get_speed(host), sg_host_get_computed_flops(host)); // Run a task start = MSG_get_clock(); msg_task_t task1 = MSG_task_create("t1", 100E6, 0, NULL); XBT_INFO("Run a task of %.0E flops", MSG_task_get_flops_amount(task1)); MSG_task_execute(task1); MSG_task_destroy(task1); XBT_INFO("Done working on my task; this took %.2fs; current peak speed: %.0E flop/s; number of flops computed so " "far: %.0E", MSG_get_clock() - start, MSG_host_get_speed(host), sg_host_get_computed_flops(host)); // ========= Change power peak ========= int pstate = 2; sg_host_set_pstate(host, pstate); XBT_INFO("========= Requesting pstate %d (speed should be of %.0E flop/s and is of %.0E flop/s)", pstate, MSG_host_get_power_peak_at(host, pstate), MSG_host_get_speed(host)); // Run a second task start = MSG_get_clock(); task1 = MSG_task_create("t2", 100E6, 0, NULL); XBT_INFO("Run a task of %.0E flops", MSG_task_get_flops_amount(task1)); MSG_task_execute(task1); MSG_task_destroy(task1); XBT_INFO("Done working on my task; this took %.2fs; current peak speed: %.0E flop/s; number of flops computed so " "far: %.0E", MSG_get_clock() - start, MSG_host_get_speed(host), sg_host_get_computed_flops(host)); start = MSG_get_clock(); XBT_INFO("========= Requesting a reset of the computation counter"); sg_host_load_reset(host); XBT_INFO("Sleep for 4 seconds"); MSG_process_sleep(4); XBT_INFO("Done sleeping %.2f s; peak speed: %.0E flop/s; number of flops computed so far: %.0E", MSG_get_clock() - start, MSG_host_get_speed(host), sg_host_get_computed_flops(host)); // =========== Turn the other host off ========== XBT_INFO("Turning MyHost2 off, and sleeping another 10 seconds. MyHost2 computed %.0f flops so far.", MSG_host_get_computed_flops(MSG_host_by_name("MyHost2"))); MSG_host_off(MSG_host_by_name("MyHost2")); start = MSG_get_clock(); MSG_process_sleep(10); XBT_INFO("Done sleeping %.2f s; peak speed: %.0E flop/s; number of flops computed so far: %.0E", MSG_get_clock() - start, MSG_host_get_speed(host), sg_host_get_computed_flops(host)); return 0; }
/** * \brief Sets the pstate at which the processor should run * * \param pstate_index pstate to switch to */ void smpi_set_host_pstate(int pstate_index) { sg_host_set_pstate(SIMIX_host_self(), pstate_index); }