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/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-08-10 RV the first version
*/
#include <rtthread.h>
#include "utest.h"
/**
* @brief Thread Preemption Test with Different Priorities.
*
* @note Create multiple threads, low-priority threads run first,
* high-priority threads preempt low-priority threads, and
* print the current status of each core in the thread's entry function.
*
* Test Case Name: [smp_thread_preemptions]
*
* Test Objectives:
* - Test the thread preemption logic under the SMP architecture
*
* Test Scenarios:
* - A high-priority thread thigh and a low-priority thread tlow are created. Since tlow is created
* - prior to thigh, it prints the thread list information first and then waits for the finish_flag
* - bit. Once thigh becomes ready, it preempts tlow, prints the thread list, and then sets the
* - finish_flag bit. After that, tlow exits the busy-wait loop.
*
* Verification Metrics:
* - First, the message "Low priority thread is running" will be displayed, followed immediately by
* - a thread_list information list. Subsequently, the message "High priority thread is running" will
* - appear, and in the thread_list that follows, the tlow thread can be observed in the ready state.
*
* Dependencies:
* - Enable RT_USING_SMP, set RT_THREAD_PRIORITY_MAX = 256.
*
* Expected Results:
* - You will see the message "[ PASSED ] [ result ] testcase (core.smp_thread_preemptions)", and observe
* - the tlow thread in the ready state in the thread_list printed by the thigh thread.
*/
#define THREAD_PRIORITY_HIGH 21
#define THREAD_PRIORITY_LOW 30
#define THREAD_STACK_SIZE UTEST_THR_STACK_SIZE
static rt_thread_t threads[2];
static volatile rt_uint8_t finish_flag = 0;
static struct rt_spinlock lock;
/* High Priority Thread */
static void thread_high_entry(void *parameter)
{
uassert_true(1);
rt_spin_lock(&lock);
rt_kprintf("High priority thread is running\n");
extern long list_thread(void);
list_thread();
rt_spin_unlock(&lock);
finish_flag = 1;
}
/* Low Priority Thread */
static void thread_low_entry(void *parameter)
{
uassert_true(1);
rt_spin_lock(&lock);
rt_kprintf("Low priority thread is running\n");
extern long list_thread(void);
list_thread();
rt_spin_unlock(&lock);
while (!finish_flag);
}
static void thread_preemptions_tc(void)
{
/* Creating low-priority thread */
threads[0] = rt_thread_create("tlow", thread_low_entry, RT_NULL, THREAD_STACK_SIZE, THREAD_PRIORITY_LOW, 10);
if (threads[0] != RT_NULL)
{
uassert_true(1);
rt_thread_startup(threads[0] );
}
rt_thread_delay(5);
/* Creating high-priority thread */
threads[1] = rt_thread_create("thigh", thread_high_entry, RT_NULL, THREAD_STACK_SIZE, THREAD_PRIORITY_HIGH, 10);
if (threads[1] != RT_NULL)
{
uassert_true(1);
rt_thread_startup(threads[1]);
}
rt_thread_delay(50);
}
static rt_err_t utest_tc_init(void)
{
rt_spin_lock_init(&lock);
finish_flag = 0;
return RT_EOK;
}
static rt_err_t utest_tc_cleanup(void)
{
return RT_EOK;
}
static void testcase(void)
{
UTEST_UNIT_RUN(thread_preemptions_tc);
}
UTEST_TC_EXPORT(testcase, "core.smp_thread_preemptions", utest_tc_init, utest_tc_cleanup, 10);
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