内存信息统计

typedef struct {
    UINT32 totalUsedSize;       // 内存池的内存使用量
    UINT32 totalFreeSize;       // 内存池的剩余内存大小
    UINT32 maxFreeNodeSize;     // 内存池的最大空闲内存块大小
    UINT32 usedNodeNum;         // 内存池的非空闲内存块个数
    UINT32 freeNodeNum;         // 内存池的空闲内存块个数
#if (LOSCFG_MEM_WATERLINE == 1)     // 默认关闭，可以通过menuconfig配置工具打开
    UINT32 usageWaterLine;      // 内存池的水线值
#endif
} LOS_MEM_POOL_STATUS;

#include <stdio.h>
#include <string.h>
#include "los_task.h"
#include "los_memory.h"
#include "los_config.h"

void MemInfoTaskFunc(void)
{
    LOS_MEM_POOL_STATUS poolStatus = {0};

  /* pool为要统计信息的内存地址，此处以OS_SYS_MEM_ADDR为例 */
    void *pool = OS_SYS_MEM_ADDR;
    LOS_MemInfoGet(pool, &poolStatus);
    /* 算出内存池当前的碎片率百分比 */
    unsigned char fragment = 100 - poolStatus.maxFreeNodeSize * 100 / poolStatus.totalFreeSize;
    /* 算出内存池当前的使用率百分比 */
    unsigned char usage = LOS_MemTotalUsedGet(pool) * 100 / LOS_MemPoolSizeGet(pool);
    printf("usage = %d, fragment = %d, maxFreeSize = %d, totalFreeSize = %d, waterLine = %d\n", usage, fragment, poolStatus.maxFreeNodeSize, 
           poolStatus.totalFreeSize, poolStatus.usageWaterLine);
}

int MemTest(void)
{
    unsigned int ret;
    unsigned int taskID;
    TSK_INIT_PARAM_S taskStatus = {0};
    taskStatus.pfnTaskEntry = (TSK_ENTRY_FUNC)MemInfoTaskFunc;
    taskStatus.uwStackSize  = 0x1000;
    taskStatus.pcName       = "memInfo";
    taskStatus.usTaskPrio   = 10;
    ret = LOS_TaskCreate(&taskID, &taskStatus);
    if (ret != LOS_OK) {
        printf("task create failed\n");
        return -1;
    }
    return 0;
}

usage = 22, fragment = 3, maxFreeSize = 49056, totalFreeSize = 50132, waterLine = 1414