请问如何查看内核的日志信息？

发布于 2024-11-27 21:12:58 浏览：183 订阅该版

如题，我在ulog中设置了打印等级为debug，设置后端为console，但是执行程序时并没有打印内核路径的日志信息。

![screenshot_图片.png](https://oss-club.rt-thread.org/uploads/20241127/4c6459c1d11de477eb92ad18b1393616.png.webp)

代码如下：

```c
#define THREAD_STACK_SIZE   1024
#define THREAD_PRIORITY     20
#define THREAD_TIMESLICE    10

/* 线程入口 */
static void thread_entry(void* parameter)
{
    rt_uint32_t value;
    rt_uint32_t count = 0;

value = (rt_uint32_t)parameter;
    while (1)
    {
        if(0 == (count % 5))
        {
            rt_kprintf("thread %d is running ,thread %d count = %d\n", value , value , count);
            if(count> 200)
                return;
        }
         count++;
         if(value == 2)
            rt_thread_suspend(rt_thread_self());
         rt_schedule();
     }
}

int timeslice_sample(void)
{
    LOG_D("LOG_D: RT-Thread is an open source IoT operating system from China.\r\n");
    LOG_I("LOG_I: RT-Thread is an open source IoT operating system from China.\r\n");
    LOG_W("LOG_W: RT-Thread is an open source IoT operating system from China.\r\n");
    LOG_E("LOG_E: RT-Thread is an open source IoT operating system from China.\r\n");

rt_thread_t tid = RT_NULL;
    /* 创建线程 1 */
    tid = rt_thread_create("thread1",
                            thread_entry, (void*)1,
                            THREAD_STACK_SIZE,
                            THREAD_PRIORITY, THREAD_TIMESLICE);
    if (tid != RT_NULL)
        rt_thread_startup(tid);

/* 创建线程 2 */
    tid = rt_thread_create("thread2",
                            thread_entry, (void*)2,
                            THREAD_STACK_SIZE,
                            THREAD_PRIORITY, THREAD_TIMESLICE);
    if (tid != RT_NULL)
        rt_thread_startup(tid);
    
    /* 创建线程 3 */
    tid = rt_thread_create("thread3",
                            thread_entry, (void*)3,
                            THREAD_STACK_SIZE,
                            THREAD_PRIORITY, THREAD_TIMESLICE);
    if (tid != RT_NULL)
        rt_thread_startup(tid);

return 0;
}

/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(timeslice_sample, timeslice sample);
```
上面的代码执行`rt_thread_suspend(rt_thread_self());`时会跳转到下面函数执行：
```c
rt_err_t rt_thread_suspend(rt_thread_t thread)
{
    return rt_thread_suspend_with_flag(thread, RT_UNINTERRUPTIBLE);
}
RTM_EXPORT(rt_thread_suspend);

rt_err_t rt_thread_suspend_with_flag(rt_thread_t thread, int suspend_flag)
{
    return rt_thread_suspend_to_list(thread, RT_NULL, 0, suspend_flag);
}
RTM_EXPORT(rt_thread_suspend_with_flag);
```
最后执行下面的代码：
```c
rt_err_t rt_thread_suspend_to_list(rt_thread_t thread, rt_list_t *susp_list, int ipc_flags, int suspend_flag)
{
    rt_base_t stat;
    rt_sched_lock_level_t slvl;

/* parameter check */
    RT_ASSERT(thread != RT_NULL);
    RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
    RT_ASSERT(thread == rt_thread_self());

LOG_D("thread suspend:  %s", thread->parent.name);

rt_sched_lock(&slvl);

stat = rt_sched_thread_get_stat(thread);
    if ((stat != RT_THREAD_READY) && (stat != RT_THREAD_RUNNING))
    {
        LOG_D("thread suspend: thread disorder, 0x%2x", thread->stat);
        rt_sched_unlock(slvl);
        return -RT_ERROR;
    }

if (stat == RT_THREAD_RUNNING)
    {
        /* not suspend running status thread on other core */
        RT_ASSERT(thread == rt_thread_self());
    }
……
```

这里必定会打印` LOG_D("thread suspend:  %s", thread->parent.name);`但是我的终端上什么也没有显示，各位碰到过这种情况么？

我的硬件是esp32c3（riscv）