http://www.blogjava.net/fjzag/articles/317773.html ubuntu@ubuntu-vm:/work/sv-g5-application/projects/sysmonitor/src$ cat SVPSysMonitor.cpp /*##################################################################################################    Company       : Huizhou Desay SV Automotive Co., Ltd.    Division      : Automotive Electronics, Desay Corporation    Business Unit : Central Technology    Department    : Advanced Development (Huizhou)    Project       : G5 Platform    Module        : System Monitor    Create Date   : Nov 03, 2016 - Liu Chuqun 
     
          Update Date   :##################################################################################################*/#include "SVPType.h"#include "SVPTime.h"#include "SVPLog.h"#ifdef SVP_LOG_TAG    #undef SVP_LOG_TAG#endif#define SVP_LOG_TAG     "sysmonitor"#define NAME_LEN 64#define BUFFER_LEN 1024static SVPChar g_name[NAME_LEN] = { 0 };static SVPChar g_buffer[BUFFER_LEN] = { 0 };static SVPInt32 g_cpuPercent = 0;static SVPInt32 g_memPercent = 0;static SVPInt32 g_memTotal = 0;static SVPInt32 g_memFree = 0;static SVPInt32 g_memAvailable = 0;static SVPInt32 g_topCPU = 0;static SVPInt32 g_topMemUse = 0;void GetCPUInfo();void GetMemInfo();void PrintInfo();void MonitorStrategy();SVPVoid ResetSystem();SVPInt32 main(SVPInt32 argc, SVPChar* argv[]){    while(1)    {        GetCPUInfo();        GetMemInfo();        PrintInfo();        MonitorStrategy();        sleep(3);    }    return 0;}void MonitorStrategy(){    SVPUlong ulCurStrategyTickCount = SVPTime::GetTickCount();    if (ulCurStrategyTickCount <= 30000)        return;// 开机30秒内不执行策略。    static SVPBool s_bInLimitMode = SVP_FALSE;    static SVPUlong s_ulEnterLimitModeTime = 0;    static SVPUlong s_ulLimitModeCheckCount = 0;    if (g_cpuPercent >= 100)    {        ++s_ulLimitModeCheckCount;        if (SVP_FALSE == s_bInLimitMode)        {            s_bInLimitMode = SVP_TRUE;            s_ulEnterLimitModeTime = ulCurStrategyTickCount;        }        if (ulCurStrategyTickCount - s_ulEnterLimitModeTime >= 90000)        {            SVP_INFO("s_ulLimitModeCheckCount[%lu]", s_ulLimitModeCheckCount);            if (s_ulLimitModeCheckCount >= 30)                ResetSystem();        }    }    else    {        s_bInLimitMode = SVP_FALSE;        s_ulLimitModeCheckCount = 0;    }}void PrintInfo(){    SVP_INFO("[TopMem:%3d%%, TopCPU:%3d%%] MemTotal:%dKB, MemAvailable:%dKB, MEM:%3d%%, CPU:%3d%%.", g_topMemUse, g_topCPU, g_memTotal, g_memAvailable, g_memPercent, g_cpuPercent);    static SVPInt32 printCount = 0;    ++printCount;    if (printCount >= 60)    {        printCount = 0;        system("ps");        usleep(100000);        system("top -n1;ls /media");    }}void GetCPUInfo(){
    //获取cpu占用率    FILE *fp = fopen("/proc/stat", "r");    if (fp)    {        memset(g_name, 0, NAME_LEN);        memset(g_buffer, 0, BUFFER_LEN);        static SVPInt32 idle0 = 0, total0 = 0;        SVPInt32 user1, nice, sys, idle1, iowait, irq, softirq, total1 = 0;        fgets(g_buffer, sizeof(g_buffer), fp);        sscanf(g_buffer, "%s %d %d %d %d %d %d %d", g_name, &user1, &nice, &sys,                &idle1, &iowait, &irq, &softirq);        total1 = user1 + nice + sys + iowait + irq + softirq + idle1;        if (total1 != total0)             g_cpuPercent = 100 - ( ((idle1 - idle0) * 100)/ (double) (total1 - total0) );        else            SVP_WARN("cpu total is the same. /proc/stat maybe error!");        idle0 = idle1;        total0 = total1;        if (g_cpuPercent > g_topCPU)            g_topCPU = g_cpuPercent;        fclose(fp);    }    else    {        SVP_ERROR("fopen /proc/stat failed:%s", strerror(errno));    }}void GetMemInfo(){
    //获取内存信息    FILE *fp = fopen("/proc/meminfo", "r");    if (fp)    {        memset(g_name, 0, NAME_LEN);        memset(g_buffer, 0, BUFFER_LEN);        SVPChar unit[10] = { 0 };        fgets(g_buffer, sizeof(g_buffer), fp);        sscanf(g_buffer, "%s %d %s", g_name, &g_memTotal, unit);        fgets(g_buffer, sizeof(g_buffer), fp);        sscanf(g_buffer, "%s %d %s", g_name, &g_memFree, unit);        fgets(g_buffer, sizeof(g_buffer), fp);        sscanf(g_buffer, "%s %d %s", g_name, &g_memAvailable, unit);        if (g_memTotal)            g_memPercent = 100 - (100 * g_memAvailable) / g_memTotal;        else            SVP_WARN("mem total is 0!");        if (g_memPercent > g_topMemUse)            g_topMemUse = g_memPercent;        fclose(fp);    }    else    {        SVP_ERROR("fopen /proc/meminfo failed:%s", strerror(errno));    }}SVPVoid ResetSystem(){    system("top -n1;ls /media");    SVP_WARN("restart system now ...");    SVPUint8 tryTimes = 0;    while(tryTimes < 3)    {        ++tryTimes;        if (-1 != system("powerctrl 10 &"))            break;        else            SVP_ERROR("reboot system fail!");        sleep(1);    }    //最后一招。    //需要radio软件修改逻辑为：任何时候，只要收到first connect消息，就走core重新启动的逻辑。不要再过滤first connect消息。    sleep(5);    SVP_ERROR("can't restart system through the spi msg!");    tryTimes = 0;    while(tryTimes < 3)    {        ++tryTimes;        if (-1 != system("reboot -f &"))            break;        else            SVP_ERROR("reboot system fail!");        sleep(1);    }}