此样例CPU有4核心8线程，CPU0在图中未展示
#include <iostream>
#include <windows.h>
#include <cmath>
#define PI 3.1415926535
using namespace std;
const double _1000MILLI = 1000;
void per_second_cpu(__int64 start_time,double busy_time_rate){
start_time = GetTickCount();
while ((GetTickCount() - start_time) <= busy_time_rate * _1000MILLI){}
Sleep((1.0-busy_time_rate) * _1000MILLI);
}
void line_cpu( double busy_time_rate ){
__int64 start_time;
while(true){
per_second_cpu(start_time,busy_time_rate);
}
}
void sin_cpu(){
__int64 start_time;
while(true){
int t = 15;
for (int i = 0; i < t; ++i) {
double busy_time_rate = sin( i * 2 / ( t * 1.0 ) * PI ) / 2.0 + 0.5;
per_second_cpu(start_time , busy_time_rate);
}
}
}
DWORD WINAPI handle_line(LPVOID lpParameter){
line_cpu(*(double*)lpParameter);
}
DWORD WINAPI handle_sin(LPVOID lpParameter){
sin_cpu();
}
void begin_line(double busy_time_rate){
SetProcessAffinityMask(GetCurrentProcess(),255);
for (int i = 0; i < 7; ++i) {
HANDLE handleProcess = CreateThread(NULL, 0, handle_line, &busy_time_rate, 0, NULL);
CloseHandle(handleProcess);
}
line_cpu(busy_time_rate);
}
void begin_sin(){
SetProcessAffinityMask(GetCurrentProcess(),255);
for (int i = 0; i < 7; ++i) {
HANDLE handleProcess = CreateThread(NULL, 0, handle_sin, NULL, 0, NULL);
CloseHandle(handleProcess);
}
sin_cpu();
}
int main() {
// double busy_time_rate=0.5;
// begin_line(busy_time_rate);
begin_sin();
return 0;
}
sin()曲线
指定占用率
