时间片视频教程移植,时间片功能不起作用是什么情况

发布于 2020-07-23 20:47:48

硬件:正点原子 战舰V3
采用HAL库编程
我的程序
链接:https://pan.baidu.com/s/11HBMzpyjGjtQ-kbWwAYJvg
提取码:t34w

移植RTOS(kernel及SHELL)至工程中,用MSH命令执行timeslice_sample程序,结果如下:
msh >timeslice_sample
thread 1 is running ,thread 1 count = 0
thread 1 is running ,thread 1 count = 5
thread 1 is running ,thread 1 count = 10
thread 1 is running ,thread 1 count = 15
thread 1 is running ,thread 1 count = 20
thread 1 is running ,thread 1 count = 25
thread 1 is running ,thread 1 count = 30
thread 1 is running ,thread 1 count = 35
thread 1 is running ,thread 1 count = 40
thread 1 is running ,thread 1 count = 45
thread 1 is running ,thread 1 count = 50
thread 1 is running ,thread 1 count = 55
thread 1 is running ,thread 1 count = 60
thread 1 is running ,thread 1 count = 65
thread 1 is running ,thread 1 count = 70
thread 1 is running ,thread 1 count = 75
thread 1 is running ,thread 1 count = 80
thread 1 is running ,thread 1 count = 85
thread 1 is running ,thread 1 count = 90
thread 1 is running ,thread 1 count = 95
thread 1 is running ,thread 1 count = 100
thread 1 is running ,thread 1 count = 105
thread 1 is running ,thread 1 count = 110
thread 1 is running ,thread 1 count = 115
thread 1 is running ,thread 1 count = 120
thread 1 is running ,thread 1 count = 125
thread 1 is running ,thread 1 count = 130
thread 1 is running ,thread 1 count = 135
thread 1 is running ,thread 1 count = 140
thread 1 is running ,thread 1 count = 145
thread 1 is running ,thread 1 count = 150
thread 1 is running ,thread 1 count = 155
thread 1 is running ,thread 1 count = 160
thread 1 is running ,thread 1 count = 165
thread 1 is running ,thread 1 count = 170
thread 1 is running ,thread 1 count = 175
thread 1 is running ,thread 1 count = 180
thread 1 is running ,thread 1 count = 185
thread 1 is running ,thread 1 count = 190
thread 1 is running ,thread 1 count = 195
thread 1 is running ,thread 1 count = 200
thread 1 is running ,thread 1 count = 205
thread 2 is running ,thread 2 count = 0
thread 2 is running ,thread 2 count = 5
thread 2 is running ,thread 2 count = 10
thread 2 is running ,thread 2 count = 15
thread 2 is running ,thread 2 count = 20
thread 2 is running ,thread 2 count = 25
thread 2 is running ,thread 2 count = 30
thread 2 is running ,thread 2 count = 35
thread 2 is running ,thread 2 count = 40
thread 2 is running ,thread 2 count = 45
thread 2 is running ,thread 2 count = 50
thread 2 is running ,thread 2 count = 55
thread 2 is running ,thread 2 count = 60
thread 2 is running ,thread 2 count = 65
thread 2 is running ,thread 2 count = 70
thread 2 is running ,thread 2 count = 75
thread 2 is running ,thread 2 count = 80
thread 2 is running ,thread 2 count = 85
thread 2 is running ,thread 2 count = 90
thread 2 is running ,thread 2 count = 95
thread 2 is running ,thread 2 count = 100
thread 2 is running ,thread 2 count = 105
thread 2 is running ,thread 2 count = 110
thread 2 is running ,thread 2 count = 115
thread 2 is running ,thread 2 count = 120
thread 2 is running ,thread 2 count = 125
thread 2 is running ,thread 2 count = 130
thread 2 is running ,thread 2 count = 135
thread 2 is running ,thread 2 count = 140
thread 2 is running ,thread 2 count = 145
thread 2 is running ,thread 2 count = 150
thread 2 is running ,thread 2 count = 155
thread 2 is running ,thread 2 count = 160
thread 2 is running ,thread 2 count = 165
thread 2 is running ,thread 2 count = 170
thread 2 is running ,thread 2 count = 175
thread 2 is running ,thread 2 count = 180
thread 2 is running ,thread 2 count = 185
thread 2 is running ,thread 2 count = 190
thread 2 is running ,thread 2 count = 195
thread 2 is running ,thread 2 count = 200
thread 2 is running ,thread 2 count = 205
msh >

代码使用例程代码

这里输入代码
#include <rtthread.h>

#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++;
     }  
}

int timeslice_sample(void)
{
    rt_thread_t tid;
    /* 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-5);
    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);

rtconfig.h

/* RT-Thread config file */

#ifndef __RTTHREAD_CFG_H__
#define __RTTHREAD_CFG_H__

#if defined(__CC_ARM) || defined(__CLANG_ARM)
#include "RTE_Components.h"

#if defined(RTE_USING_FINSH)
#define RT_USING_FINSH
#endif //RTE_USING_FINSH

#endif //(__CC_ARM) || (__CLANG_ARM)

// <<< Use Configuration Wizard in Context Menu >>>
// <h>Basic Configuration
// <o>Maximal level of thread priority <8-256>
//  <i>Default: 32
#define RT_THREAD_PRIORITY_MAX  32
// <o>OS tick per second
//  <i>Default: 1000   (1ms)
#define RT_TICK_PER_SECOND  1000
// <o>Alignment size for CPU architecture data access
//  <i>Default: 4
#define RT_ALIGN_SIZE   4
// <o>the max length of object name<2-16>
//  <i>Default: 8
#define RT_NAME_MAX    8
// <c1>Using RT-Thread components initialization
//  <i>Using RT-Thread components initialization
#define RT_USING_COMPONENTS_INIT
// </c>

#define RT_USING_USER_MAIN

// <o>the stack size of main thread<1-4086>
//  <i>Default: 512
#define RT_MAIN_THREAD_STACK_SIZE     256

// </h>

// <h>Debug Configuration
// <c1>enable kernel debug configuration
//  <i>Default: enable kernel debug configuration
#define RT_DEBUG
// </c>
// <o>enable components initialization debug configuration<0-1>
//  <i>Default: 0
#define RT_DEBUG_INIT 1
// <c1>thread stack over flow detect
//  <i> Diable Thread stack over flow detect
#define RT_USING_OVERFLOW_CHECK
// </c>
// </h>

// <h>Hook Configuration
// <c1>using hook
//  <i>using hook
//#define RT_USING_HOOK
// </c>
// <c1>using idle hook
//  <i>using idle hook
//#define RT_USING_IDLE_HOOK
// </c>
// </h>

// <e>Software timers Configuration
// <i> Enables user timers
#define RT_USING_TIMER_SOFT         0
#if RT_USING_TIMER_SOFT == 0
    #undef RT_USING_TIMER_SOFT
#endif
// <o>The priority level of timer thread <0-31>
//  <i>Default: 4
#define RT_TIMER_THREAD_PRIO        4
// <o>The stack size of timer thread <0-8192>
//  <i>Default: 512
#define RT_TIMER_THREAD_STACK_SIZE  512
// </e>

// <h>IPC(Inter-process communication) Configuration
// <c1>Using Semaphore
//  <i>Using Semaphore
#define RT_USING_SEMAPHORE
// </c>
// <c1>Using Mutex
//  <i>Using Mutex
//#define RT_USING_MUTEX
// </c>
// <c1>Using Event
//  <i>Using Event
//#define RT_USING_EVENT
// </c>
// <c1>Using MailBox
//  <i>Using MailBox
#define RT_USING_MAILBOX
// </c>
// <c1>Using Message Queue
//  <i>Using Message Queue
//#define RT_USING_MESSAGEQUEUE
// </c>
// </h>

// <h>Memory Management Configuration
// <c1>Dynamic Heap Management
//  <i>Dynamic Heap Management
#define RT_USING_HEAP
// </c>
// <c1>using small memory
//  <i>using small memory
#define RT_USING_SMALL_MEM
// </c>
// <c1>using tiny size of memory
//  <i>using tiny size of memory
//#define RT_USING_TINY_SIZE
// </c>
// </h>

// <h>Console Configuration
// <c1>Using console
//  <i>Using console
#define RT_USING_CONSOLE
// </c>
// <o>the buffer size of console <1-1024>
//  <i>the buffer size of console
//  <i>Default: 128  (128Byte)
#define RT_CONSOLEBUF_SIZE          128
// </h>

#if defined(RT_USING_FINSH)
    #define FINSH_USING_MSH
    #define FINSH_USING_MSH_ONLY
    // <h>Finsh Configuration
    // <o>the priority of finsh thread <1-7>
    //  <i>the priority of finsh thread
    //  <i>Default: 6
    #define __FINSH_THREAD_PRIORITY     5
    #define FINSH_THREAD_PRIORITY       (RT_THREAD_PRIORITY_MAX / 8 * __FINSH_THREAD_PRIORITY + 1)
    // <o>the stack of finsh thread <1-4096>
    //  <i>the stack of finsh thread
    //  <i>Default: 4096  (4096Byte)
    #define FINSH_THREAD_STACK_SIZE     4096
    // <o>the history lines of finsh thread <1-32>
    //  <i>the history lines of finsh thread
    //  <i>Default: 5
    #define FINSH_HISTORY_LINES         5

    #define FINSH_USING_SYMTAB
    // </h>
#endif

// <<< end of configuration section >>>

#endif

请问时间片为什么不起作用

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yangjie
yangjie 2020-07-24

怀疑移植的时候时钟没配

3 个回答
bernard
bernard 2020-07-24

为什么没起作用,从log信息看起作用了的

cheney
cheney 2020-07-24

我的理解,同优先级的情况下,线程1和线程2都处于就绪态的情况下,只有线程1的时间片跑完的情况下才会去跑线程2,而上面的设置的时间片为10,也就是线程1在10个os_tick后才会去跑线程2,如果一个os_tick为1ms,也就是线程1会在10ms后才会去切换线程2,而count加到200应该是不需要到10ms的,这也就是会出现先线程1跑完后再跑线程2.

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