774****com
同一个程序在不同sdk情况下zi-data大小占用相差很大。
sdk-v1.6.08（Program Size: Code=93308 RO-data=7008 RW-data=1444 ZI-data=70148 ）
sdk-v1.6.10（Program Size: Code=91360 RO-data=6272 RW-data=1380 ZI-data=90540 ）
对比map文件后发现原因是app_memory.h文件下的参数设置不同：
sdk-v1.6.08:#define APP_MEM_HEAP_SIZE (12 * 1024) /**< Total app memory heap size. */
sdk-v1.6.10:#define APP_MEM_HEAP_SIZE (32 * 1024) /**< Total app memory heap size. */
如果我改回（12*1024）会有问题吗？
774****com
这个参数用在了app_memory.c下
/* * LOCAL VARIABLE DEFINITIONS ***************************************************************************************** */
static __align(APP_MEM_ALIGN_NUM) uint8_t s_mem_heap[APP_MEM_HEAP_SIZE];
static app_mem_block_t s_start_list_node;static app_mem_block_t s_end_list_node;
static size_t s_curr_free_bytes;
static size_t s_ever_free_bytes_min;
/* * LOCAL FUNCTION DEFINITIONS ***************************************************************************************** */
static void app_mem_init(void)
{
app_mem_block_t *p_fir_free_block;
s_start_list_node.p_next_free_block = (void *)s_mem_heap;
s_start_list_node.block_size = 0;
s_end_list_node.p_next_free_block = NULL;
s_end_list_node.block_size = 0; p_fir_free_block = (void *)s_mem_heap;
p_fir_free_block->p_next_free_block = &s_end_list_node;
p_fir_free_block->block_size = APP_MEM_HEAP_SIZE;
s_curr_free_bytes = p_fir_free_block->block_size;
s_ever_free_bytes_min = p_fir_free_block->block_size;
}
774****com
如果我把它改成：
/* * LOCAL VARIABLE DEFINITIONS ***************************************************************************************** */
//static __align(APP_MEM_ALIGN_NUM) uint8_t s_mem_heap[APP_MEM_HEAP_SIZE];
static app_mem_block_t s_start_list_node;
static app_mem_block_t s_end_list_node;
static size_t s_curr_free_bytes;
static size_t s_ever_free_bytes_min;
/* * LOCAL FUNCTION DEFINITIONS ***************************************************************************************** */
static void app_mem_init(void)
{
__align(APP_MEM_ALIGN_NUM) uint8_t s_mem_heap[APP_MEM_HEAP_SIZE];
app_mem_block_t *p_fir_free_block;
s_start_list_node.p_next_free_block = (void *)s_mem_heap;
s_start_list_node.block_size = 0;
s_end_list_node.p_next_free_block = NULL;
s_end_list_node.block_size = 0;
p_fir_free_block = (void *)s_mem_heap;
p_fir_free_block->p_next_free_block = &s_end_list_node;
p_fir_free_block->block_size = APP_MEM_HEAP_SIZE;
s_curr_free_bytes = p_fir_free_block->block_size;
s_ever_free_bytes_min = p_fir_free_block->block_size;
}
改成这个样子把它放到函数内部变成局部变量空间全省下来了，会不会有问题？
185***527
你好
1. APP_MEM_HEAP_SIZE含义是分配给内存池的大小，具体大小分配可根据使用应用场景而定；
2. 内存池是全局使用的，如果使用 s_mem_heap 定义为函数局部变量，则内存池指向主栈空间，会因内存互踩导致系统崩溃；
希望以上回答对你有帮助！
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