要研究的东东啊

#include<iostream>#include<cmath>#include<windows.h>static int PERIOD = 60 * 1000; //周期msconst int COUNT = 300; //一个周期计算次数const double GAP_LINEAR = 100; //线性函数时间间隔100msconst double PI = 3.1415926535898; //PIconst double GAP = (double)PERIOD / COUNT; //周期函数时间间隔const double FACTOR = 2 * PI / PERIOD; //周期函数的系数static double Ratio = 0.5; //线性函数的值 0.5即50%static double Max=0.9; //方波函数的最大值static double Min=0.1; //方波函数的最小值typedef double Func(double); //定义一个函数类型 Func*为函数指针typedef void Solve(Func *calc);//定义函数类型，参数为函数指针Func*inline DWORD get_time() { return GetTickCount(); //操作系统启动到现在所经过的时间ms}double calc_sin(double x) //调用周期函数solve_period的参数{return (1 + sin(FACTOR * x)) / 2; //y=1/2(1+sin(a*x)) a=2*Pi/(60*1000)}double calc_cos(double x){return (1 + cos(FACTOR * x)) / 2; //y=1/2(1+cos(a*x))}double calc_absin(double x){return fabs(sin(FACTOR * x));}double calc_fangbo(double x) //调用周期函数solve_period的参数{//方波函数if(x<=PERIOD/2) return Max;else return Min;}void solve_period(Func *calc) //线程函数为周期函数{double x = 0.0;double cache[COUNT];for (int i = 0; i < COUNT; ++i, x += GAP) cache[i] = calc(x); int count = 0;while(1){unsigned ta = get_time();if (count >= COUNT) count = 0;double r = cache[count++];DWORD busy = r * GAP;while(get_time() - ta < busy) {}Sleep(GAP - busy);}}void solve_linear(Func*) //线程函数为线性函数，参数为空 NULL{const unsigned BUSY = Ratio * GAP_LINEAR;const unsigned IDLE = (1 - Ratio) * GAP_LINEAR;while(1){unsigned ta = get_time();while(get_time() - ta < BUSY) {}Sleep(IDLE);}}void run(int i=4,double R=0.5,double T=60000,double max=0.9,double min=0.1)//i为输出状态，R为直线函数的值，T为周期函数的周期，max方波最大值，min方波最小值{Ratio=R; PERIOD=T; Max=max; Min=min;//Func *func[] = {NULL ,calc_sin,calc_fangbo}; //传给Solve的参数，函数指针数组Func *func[] = {NULL, calc_sin, calc_cos, calc_absin, calc_fangbo};Solve *solve_func[] = { solve_linear, solve_period}; //Solve函数指针数组//const int NUM_CPUS = 2; //双核，通用的可以用下面GetSystemInfo得到cpu数目SYSTEM_INFO info;GetSystemInfo(&info); //得到cpu数目const int NUM_CPUS = info.dwNumberOfProcessors;//printf("%d\n",NUM_CPUS);HANDLE handle[NUM_CPUS]; DWORD thread_id[NUM_CPUS]; //线程idswitch(i){case 4: //{if ((handle[0] = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)solve_func[1], //CPU1正弦 (VOID*)func[1], 0, &thread_id[0])) != NULL) //创建新线程SetThreadAffinityMask(handle[0], 1); //限定线程运行在哪个cpu上if ((handle[1] = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)solve_func[1], //CPU2余弦 (VOID*)func[2], 0, &thread_id[1])) != NULL) //创建新线程SetThreadAffinityMask(handle[1], 2); //限定线程运行在哪个cpu上if ((handle[2] = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)solve_func[1], //CPU3正弦绝对值 (VOID*)func[3], 0, &thread_id[2])) != NULL) //创建新线程SetThreadAffinityMask(handle[2], 4); //限定线程运行在哪个cpu上if ((handle[3] = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)solve_func[1], //CPU4方波 (VOID*)func[4], 0, &thread_id[3])) != NULL) //创建新线程SetThreadAffinityMask(handle[3], 8); //限定线程运行在哪个cpu上WaitForSingleObject(handle[0],INFINITE); //等待线程结束break;}default: break;}}int main(){run(4,0.8,60000,0.8,0.3);}

让CPU显示正弦曲线

#include <windows.h>#include <stdlib.h>#include <math.h>const double SPLIT = 0.01;const int COUNT = 200;const double PI = 3.14159265;const int INTERVAL = 300;int main(){DWORD busySpan[COUNT]; //array of busy timesDWORD idleSpan[COUNT]; //idle int half = INTERVAL/2;double radian = 0.0;for (int i = 0; i < COUNT; i++){busySpan[i] = (DWORD)(half + sin(PI * radian) * half);idleSpan[i] = INTERVAL - busySpan[i];radian += SPLIT;}DWORD startTime = 0;int j = 0;while(true){j = j % COUNT;startTime = GetTickCount();while((GetTickCount() - startTime) <= busySpan[j]);Sleep(idleSpan[j]);j++;}return 0;}

双核cpu使用率画正弦曲线

#include <windows.h>#include <stdlib.h>#include <iostream>#include <math.h>#include <tchar.h>const double SPLIT = 0.01;const int COUNT = 200;const double PI = 3.14159265;const int INTERVAL = 300;int main(int argc,char* argv[]){ SYSTEM_INFO systemInfo; ::GetSystemInfo(&systemInfo); std::cout << systemInfo.wProcessorArchitecture << std::endl; std::cout << systemInfo.dwProcessorType << std::endl; std::cout << "处理器数目:" << systemInfo.dwNumberOfProcessors << std::endl; std::cout << "处理器掩码:" << systemInfo.dwActiveProcessorMask << std::endl; //PDWORD_PTR process1,process2; //GetProcessAffinityMask(::GetCurrentProcess(),process1,process2); std::cout << SetProcessAffinityMask(::GetCurrentProcess(),0x00000001) << std::endl;  //if(!SetThreadAffinityMask(::GetCurrentProcess(),0x00000003)) {  //std::cout << "错误：" << GetLastError() << std::endl;  //::MessageBox(GetActiveWindow(),_T("asdf"),_T("asdf"),MB_OK); } //绘制正弦曲线  DWORD busySpan[COUNT]; DWORD idleSpan[COUNT]; int half = INTERVAL/2; double radian = 0.0; for(int i=0;i<COUNT;i++) {  busySpan[i] = (DWORD)(half + (sin(PI*radian)*half));  idleSpan[i] = INTERVAL - busySpan[i];  radian += SPLIT;   } DWORD startTime  = 0; int j = 0; while(true) {  j=j%COUNT;  startTime = GetTickCount();  while((GetTickCount()-startTime)<=busySpan[j])  ;  Sleep(idleSpan[j]);  j++; } return 0;}

http://blog.renren.com/share/225465617/15198723344