| /* |
| * Copyright (c) 2012-2015 Wind River Systems, Inc. |
| * Copyright (c) 2020 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/kernel.h> |
| #include <zephyr/timing/timing.h> |
| #include "utils.h" |
| |
| /* the number of mutex lock/unlock cycles */ |
| #define N_TEST_MUTEX 1000 |
| |
| K_MUTEX_DEFINE(test_mutex); |
| |
| |
| /** |
| * |
| * @brief Test for the multiple mutex lock/unlock time |
| * |
| * The routine performs multiple mutex locks and then multiple mutex |
| * unlocks to measure the necessary time. |
| * |
| * @return 0 on success |
| */ |
| int mutex_lock_unlock(void) |
| { |
| int i; |
| uint32_t diff; |
| timing_t timestamp_start; |
| timing_t timestamp_end; |
| |
| timing_start(); |
| |
| timestamp_start = timing_counter_get(); |
| |
| for (i = 0; i < N_TEST_MUTEX; i++) { |
| k_mutex_lock(&test_mutex, K_FOREVER); |
| } |
| |
| timestamp_end = timing_counter_get(); |
| |
| diff = timing_cycles_get(×tamp_start, ×tamp_end); |
| PRINT_STATS_AVG("Average time to lock a mutex", diff, N_TEST_MUTEX); |
| |
| timestamp_start = timing_counter_get(); |
| |
| for (i = 0; i < N_TEST_MUTEX; i++) { |
| k_mutex_unlock(&test_mutex); |
| } |
| |
| timestamp_end = timing_counter_get(); |
| diff = timing_cycles_get(×tamp_start, ×tamp_end); |
| |
| PRINT_STATS_AVG("Average time to unlock a mutex", diff, N_TEST_MUTEX); |
| timing_stop(); |
| return 0; |
| } |