| /* |
| * Copyright (c) 2012-2015 Wind River Systems, Inc. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /* |
| * @file measure time for sema lock and release |
| * |
| * This file contains the test that measures semaphore and mutex lock and |
| * release time in the kernel. There is no contention on the sema nor the |
| * mutex being tested. |
| */ |
| |
| #include <zephyr.h> |
| #include <timing/timing.h> |
| #include "utils.h" |
| |
| /* the number of semaphore give/take cycles */ |
| #define N_TEST_SEMA 1000 |
| |
| #define STACK_SIZE (512 + CONFIG_TEST_EXTRA_STACKSIZE) |
| /* stack used by the threads */ |
| static K_THREAD_STACK_DEFINE(thread_one_stack, STACK_SIZE); |
| |
| static struct k_thread thread_one_data; |
| |
| K_SEM_DEFINE(lock_unlock_sema, 0, N_TEST_SEMA); |
| |
| K_SEM_DEFINE(sem_bench, 0, 1); |
| |
| timing_t timestamp_start_sema_t_c; |
| timing_t timestamp_end_sema_t_c; |
| timing_t timestamp_start_sema_g_c; |
| timing_t timestamp_end_sema_g_c; |
| |
| void thread_sema_test1(void *p1, void *p2, void *p3) |
| { |
| timestamp_start_sema_t_c = timing_counter_get(); |
| k_sem_take(&sem_bench, K_FOREVER); |
| timestamp_end_sema_g_c = timing_counter_get(); |
| } |
| |
| int sema_context_switch(void) |
| { |
| uint32_t diff; |
| timing_start(); |
| |
| k_thread_create(&thread_one_data, thread_one_stack, |
| STACK_SIZE, thread_sema_test1, |
| NULL, NULL, NULL, |
| K_PRIO_PREEMPT(3), 0, K_FOREVER); |
| k_thread_name_set(&thread_one_data, "sema_test1"); |
| k_thread_start(&thread_one_data); |
| |
| timestamp_end_sema_t_c = timing_counter_get(); |
| diff = timing_cycles_get(×tamp_start_sema_t_c, ×tamp_end_sema_t_c); |
| PRINT_STATS("Semaphore take time (context switch)", diff); |
| |
| |
| timestamp_start_sema_g_c = timing_counter_get(); |
| k_sem_give(&sem_bench); |
| diff = timing_cycles_get(×tamp_start_sema_g_c, ×tamp_end_sema_g_c); |
| PRINT_STATS("Semaphore give time (context switch)", diff); |
| |
| return 0; |
| } |
| |
| /** |
| * |
| * @brief The function tests semaphore test/signal time |
| * |
| * The routine performs unlock the quite amount of semaphores and then |
| * acquires them in order to measure the necessary time. |
| * |
| * @return 0 on success |
| */ |
| int sema_test_signal(void) |
| { |
| int i; |
| uint32_t diff; |
| timing_t timestamp_start; |
| timing_t timestamp_end; |
| |
| bench_test_start(); |
| timing_start(); |
| |
| timestamp_start = timing_counter_get(); |
| |
| for (i = 0; i < N_TEST_SEMA; i++) { |
| k_sem_give(&lock_unlock_sema); |
| } |
| |
| timestamp_end = timing_counter_get(); |
| timing_stop(); |
| |
| if (bench_test_end() == 0) { |
| diff = timing_cycles_get(×tamp_start, ×tamp_end); |
| PRINT_STATS_AVG("Average semaphore signal time", diff, N_TEST_SEMA); |
| } else { |
| error_count++; |
| PRINT_OVERFLOW_ERROR(); |
| } |
| |
| bench_test_start(); |
| timing_start(); |
| |
| timestamp_start = timing_counter_get(); |
| |
| for (i = 0; i < N_TEST_SEMA; i++) { |
| k_sem_take(&lock_unlock_sema, K_FOREVER); |
| } |
| |
| timestamp_end = timing_counter_get(); |
| timing_stop(); |
| |
| if (bench_test_end() == 0) { |
| diff = timing_cycles_get(×tamp_start, ×tamp_end); |
| PRINT_STATS_AVG("Average semaphore test time", diff, N_TEST_SEMA); |
| } else { |
| error_count++; |
| PRINT_OVERFLOW_ERROR(); |
| } |
| timing_stop(); |
| return 0; |
| } |