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/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-01-17 Shell the first version
*/
#include <rtthread.h>
#include <stdlib.h>
#include "utest.h"
/**
* Stressful Test for Mutex
*/
#define TEST_SECONDS 30
#define TEST_LOOP_TICKS (TEST_SECONDS * RT_TICK_PER_SECOND)
#define TEST_THREAD_COUNTS (RT_CPUS_NR)
#define TEST_PROGRESS_COUNTS (36)
#define TEST_PROGRESS_ON (TEST_LOOP_TICKS/TEST_PROGRESS_COUNTS)
#define TEST_PRIORITY_HIGHEST (UTEST_THR_PRIORITY+1)
#define TEST_RANDOM_LATENCY_MAX (1000 * 1000)
static struct rt_semaphore _thr_exit_sem;
static rt_atomic_t _progress_counter;
static rt_atomic_t _exit_flag;
static struct rt_mutex _racing_lock;
static void test_thread_entry(void *param)
{
while (1)
{
rt_mutex_take(&_racing_lock, RT_WAITING_FOREVER);
rt_mutex_release(&_racing_lock);
if (rt_atomic_load(&_exit_flag))
{
break;
}
}
rt_sem_release(&_thr_exit_sem);
}
static void mutex_stress_tc(void)
{
rt_err_t error;
rt_thread_t tester;
const rt_base_t priority_base = TEST_PRIORITY_HIGHEST;
for (size_t i = 0; i < TEST_THREAD_COUNTS; i++)
{
tester = rt_thread_create(
"tester",
test_thread_entry,
(void *)0,
UTEST_THR_STACK_SIZE,
priority_base + (i % (RT_THREAD_PRIORITY_MAX - TEST_PRIORITY_HIGHEST)),
1);
rt_thread_startup(tester);
}
for (size_t i = 0; i < TEST_LOOP_TICKS; i++)
{
rt_thread_delay(1);
if (rt_atomic_add(&_progress_counter, 1) % TEST_PROGRESS_ON == 0)
uassert_true(1);
}
/* trigger exit request for all sub-threads */
rt_atomic_store(&_exit_flag, 1);
/* waiting for sub-threads to exit */
for (size_t i = 0; i < TEST_THREAD_COUNTS; i++)
{
error = rt_sem_take(&_thr_exit_sem, RT_WAITING_FOREVER);
uassert_int_equal(error, RT_EOK);
}
}
static rt_err_t utest_tc_init(void)
{
int *pseed = rt_malloc(sizeof(int));
srand(*(int *)pseed);
rt_free(pseed);
rt_sem_init(&_thr_exit_sem, "test", 0, RT_IPC_FLAG_PRIO);
rt_mutex_init(&_racing_lock, "ipc", RT_IPC_FLAG_PRIO);
return RT_EOK;
}
static rt_err_t utest_tc_cleanup(void)
{
rt_sem_detach(&_thr_exit_sem);
rt_mutex_detach(&_racing_lock);
return RT_EOK;
}
static void testcase(void)
{
UTEST_UNIT_RUN(mutex_stress_tc);
}
UTEST_TC_EXPORT(testcase, "core.scheduler_mutex", utest_tc_init, utest_tc_cleanup, TEST_SECONDS);
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