int main()
{
int total_jiffies1, total_jiffies2;
int work_jiffies1, work_jiffies2;
getCpuUsage(total_jiffies1, work_jiffies1);
sleep(5);
getCpuUsage(total_jiffies2, work_jiffies2);
double work_over_period = work_jiffies2 - work_jiffies1;
double total_over_period = total_jiffies2 - total_jiffies1;
double cpu = work_over_period / total_over_period * 100;
std::cout << cpu << "%" << std::endl;
}
int main(){
long long i;
for (i = 0 ; i<10000000;i++)
{
getCpuUsage();
}
return 0;
}
void CCPULoad::read()
{
try
{
m_keyword->set(getCpuUsage());
}
catch (shared::exception::CException& exception)
{
std::cout << "CPU Load reading failed:" << exception.what() << std::endl;
}
}
QJsonObject Client::getJsonInfo() {
QJsonObject json;
json["IP"] = socket.localAddress().toString();
json["Name"] = getHostname();
json["CPU"] = getCpuUsage();
json["Memory"] = getMemoryUsage();
json["Disk"] = getDiskUsage();
json["Time"] = currentTime();
QJsonArray devices = QJsonArray::fromStringList(listAllDevices());
json["Devices"] = devices;
return json;
}
int fileInit() {
FILE *fp = NULL;
getCpuUsage();//获取CPU数，并舍弃第一组数据
if (_access("CpuUsage.log",0) == -1)//判断是不是新文件
{
if(((fp = fopen("CpuUsage.log", "wt")) == NULL))
{
printf("Can not creat log file");
exit(0);
}
fprintf(fp, "This compute has %d core!\n", m_iNumberProcessors);
fputs("Sum\t", fp);
for (int i = 1; i <= m_iNumberProcessors; i++)
fprintf(fp, "Core%d\t", i);
fputs("\n",fp);
fclose(fp);
} else {
if(((fp = fopen("CpuUsage.log", "r+")) == NULL))
{
printf("Can not read log file");
exit(0);
}
int pos;
for(pos = 0;pos > -1000;pos--)//判断记录是否出错
{
fseek( fp, pos, SEEK_END );
if(fgetc(fp) == '\n') break;
}
if(pos != 0)
{
//重写出错记录
fseek(fp, pos+1, SEEK_END );
double cpuUsage[33] = {0};//最大支持32核;
getAverageCpuUsage(cpuUsage);
for (int i = 0; i < m_iNumberProcessors+1; i++)
fprintf(fp, "%.3f\t", cpuUsage[i]);
fputs("\n",fp);
}
fclose(fp);
}
return 0;
}
int getAverageCpuUsage(double cpuUsage[17])
{
for(int n=0;n<Time;n++) { //求和
Sleep(1000);
cpuUsage[0] += getCpuUsage();
for (int i = 0; i < m_iNumberProcessors; i++)
{
cpuUsage[i+1] += m_PUT[i].dbIdleTime;
}
}
//求平均
for (int i = 0; i < m_iNumberProcessors+1; i++)
{
cpuUsage[i] /= Time;
}
return 1;
}
int main(int argc, char *argv[])
{
unsigned long long int Tms=0;
int mem;
float usage;
int pid = atoi(argv[1]);
FILE *fp = fopen("data.csv", "w");
fprintf(fp,"T(ms),mem,cpu\n");
signal(SIGINT, catchSig);
while(1)
{
if( ctrl_c == 0 )
{
usage = getCpuUsage(500000, pid);
mem = getMemValue(pid);
fprintf(fp,"%lld,%d,%0.2f\n", Tms, mem, usage);
printf("T:%lld\t Mem: %dKB\t CPU: %0.2f\n", Tms, mem, usage);
Tms = Tms + 50;
}
}
}
/*
double get_cpu_use_rate(const struct cpu_usage_struct *cur,
const struct cpu_usage_struct *old)
{
double user,sys,nice,idle,total;
double cpu_rate;
user = (double)(cur->cpu_user - old->cpu_user);
sys = (double)(cur->cpu_sys - old->cpu_sys);
nice = (double)(cur->cpu_nice - old->cpu_nice);
idle = (double)(cur->cpu_idle - old->cpu_idle);
total = user + sys + nice + idle;
cpu_rate = (1-idle/total)*100;
return total;
}
double get_cpu_us_rate(const struct cpu_usage_struct *cur,
const struct cpu_usage_struct *old)
{
double user,sys,nice,idle,total;
double cpu_rate;
user = (double)(cur->cpu_user - old->cpu_user);
sys = (double)(cur->cpu_sys - old->cpu_sys);
nice = (double)(cur->cpu_nice - old->cpu_nice);
idle = (double)(cur->cpu_idle - old->cpu_idle);
total = user + sys + nice + idle;
cpu_rate = (user/total)*100;
return cpu_rate;
}
double get_cpu_free_rate(const struct cpu_usage_struct *cur,
const struct cpu_usage_struct *old)
{
double user,sys,nice,idle,total;
double free_rate;
user = (double)(cur->cpu_user - old->cpu_user);
sys = (double)(cur->cpu_sys - old->cpu_sys);
nice = (double)(cur->cpu_nice - old->cpu_nice);
idle = (double)(cur->cpu_idle - old->cpu_idle);
total = user + sys + nice + idle;
free_rate = (idle /total)*100;
return free_rate;
}
int get_cpuinfo_from_proc_stat(struct cpu_usage_struct *usage)
{
FILE *fp = NULL;
char tmp[10];
fp = fopen(CPU_FILE_PROC_STAT,"r");
if(fp == NULL)
{
perror("fopen");
return -1;
}
printf("%s,%d\n",__FILE__,__LINE__);
fscanf(fp,"%s %lu %lu %lu %lu",tmp,&(usage->cpu_user),&(usage->cpu_sys),
&(usage->cpu_nice),&(usage->cpu_idle));
printf("%s %d\n",__FILE__,__LINE__);
fclose(fp);
printf("%s %d\n",__FILE__,__LINE__);
return 1;
}
*/
int main()
{
//struct cpu_usage_struct *cur,*old,cpu_usage;
struct cpu_usage_struct cpu_usage;
struct mem_usage_struct mem;
double use_rate,free_rate,rate;
unsigned long total;
/*old = (struct cpu_usage_struct*)malloc(sizeof(struct cpu_usage_struct));
if(old == NULL)
{
perror("malloc error");
return -1;
}
cur = (struct cpu_usage_struct*)malloc(sizeof(struct cpu_usage_struct));
if(cur == NULL)
{
perror("malloc error");
return -1;
}
get_cpuinfo_from_proc_stat(old);
sleep(1);
get_cpuinfo_from_proc_stat(cur);
rate=cur->cpu_user+cur->cpu_sys+cur->cpu_nice+cur->cpu_idle;
use_rate = get_cpu_use_rate(cur,old);
free_rate = get_cpu_free_rate(cur,old);
//use_rate=getCpuUsage(&cpu_usage);
printf("us:%.1f%%\n use_rate:%.1lf%%\nfree_rate:%.1lf%%\n",100*cur->cpu_user/rate,use_rate,free_rate);
*/
total=getCpuUsage(&cpu_usage);
if (total>0)
printf("<h4>用户使用率\t%.1f%%\t系统使用率\t%.1f%%</h4>",cpu_usage.cpu_user*100.0/total,cpu_usage.cpu_sys*100.0/total);
getMemUsage(&mem);
if (mem.total>0)
printf("总数=%lu 已用=%lu 可用=%lu 缓冲区=%lu 已缓存=%lu 使用率:%.1f%%\n",mem.total,mem.used,mem.free,mem.buffers,mem.cached,(mem.used-mem.buffers-mem.cached)*100.0/mem.total);
return 1;
}
