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fix: tick 动态化计算优化，消除中断执行时间对系统总体时间的影响，保证软件定时器的响应精度。

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方案描述：
    1.周期软件定时器超时添加一个startTime字段，用于记录当前软件定时器的开始计时的时间，
    在定时器响应时，开始时间修改为上一次响应的结束时间(消除了中断执行时间对软件定时器
    的影响)。
    2.在执行tick中断的过程当中，持有tick动态计算锁，保证在该过程中不会触发tick周期
    的计算，在tick中断结束时统一计算设置。 --- 提升tick中断的执行效率
    3.在设置tick周期时，减掉tick中断执行的时间，减小周期动态化带来的时间误差
    4.新增LOSCFG_BASE_CORE_TICK_PER_SECOND_MINI配置宏，用于配置tick中断的最小响应精度
Close #I43UQJ

Signed-off-by: zhushengle <zhushengle@huawei.com>
Change-Id: Icd1159a1890046b13602b7a18dcd6234d5c61a89
This commit is contained in:
zhushengle
2021-08-06 12:48:00 +08:00
parent 9ec208a273
commit 8df3e8c965
11 changed files with 136 additions and 102 deletions
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platform/los_config.h
+16
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@@ -97,6 +97,22 @@ extern UINT32 __heap_end;
#define LOSCFG_BASE_CORE_TICK_PER_SECOND 1000 /* 1ms per tick */
#endif
/**
* @ingroup los_config
* Minimum response error accuracy of tick interrupts, number of ticks in one second
*/
#ifndef LOSCFG_BASE_CORE_TICK_PER_SECOND_MINI
#define LOSCFG_BASE_CORE_TICK_PER_SECOND_MINI 1000UL /* 1ms */
#endif
#if (LOSCFG_BASE_CORE_TICK_PER_SECOND > LOSCFG_BASE_CORE_TICK_PER_SECOND_MINI)
#error "LOSCFG_BASE_CORE_TICK_PER_SECOND_MINI must be greater than LOSCFG_BASE_CORE_TICK_PER_SECOND"
#endif
#if (LOSCFG_BASE_CORE_TICK_PER_SECOND_MINI > 1000UL)
#error "LOSCFG_BASE_CORE_TICK_PER_SECOND_MINI must be less than or equal to 1000"
#endif
/**
* @ingroup los_config
* Microseconds of adjtime in one second