CPU utilization is sinusoidal, and CPU utilization of real-time output processes and threads

CPU utilization is sinusoidal, and CPU utilization of real-time output processes and threads

#include "stdafx.h" #include <windows.h> #include <math.h>//time conversion static __int64 FILE_TIME_2_UTC (const    filetime* ftime) {Large_integer li; Li.    LowPart = ftime->dwlowdatetime; Li.    Highpart = ftime->dwhighdatetime; Return LI. QuadPart;}    Gets the number of cores of the CPU static int Get_processor_number () {system_info INFO;    GetSystemInfo (&info); return (int) info.dwnumberofprocessors;}    Get process CPU occupied int get_cpu_usage (HANDLE hand) {//cpu number static int processor_count_ =-1;    Last time static __int64 last_time_ = 0;    static __int64 last_system_time_ = 0;    FILETIME now;    FILETIME Creation_time;    FILETIME Exit_time;    FILETIME Kernel_time;    FILETIME User_time;    __int64 System_time;    __int64 time;    __int64 System_time_delta;    __int64 Time_delta;    int cpu = -1;IF (hand==null) return CPU;    if (Processor_count_ = =-1) {Processor_count_ = Get_processor_number ();    } getsystemtimeasfiletime (&now); HANDLE hprocess = OpenProcess (process_aLl_access, FALSE, PID); if (!    Getprocesstimes (hand, &creation_time, &exit_time, &kernel_time, &user_time)) {return-1;    } System_time = (FILE_TIME_2_UTC (&kernel_time) + FILE_TIME_2_UTC (&user_time))/Processor_count_;    Time = FILE_TIME_2_UTC (&now); if ((last_system_time_ = = 0) | |    (last_time_ = = 0))        {last_system_time_ = System_time;        Last_time_ = time;    return-1;    } System_time_delta = System_time-last_system_time_;    Time_delta = time-last_time_;    if (Time_delta = = 0) return-1;    CPU = (int) ((System_time_delta * + TIME_DELTA/2)/Time_delta);    Last_system_time_ = System_time;    Last_time_ = time; return CPU;}    Get thread CPU occupied int get_thread_cpu_usage (HANDLE hand) {//cpu number static int processor_count_ =-1;    Last time static __int64 last_time_ = 0;    static __int64 last_system_time_ = 0;    FILETIME now;    FILETIME Creation_time;    FILETIME Exit_time; FILETIME Kernel_time;    FILETIME User_time;    __int64 System_time;    __int64 time;    __int64 System_time_delta;    __int64 Time_delta;    int cpu = -1;IF (hand==null) return CPU;    if (Processor_count_ = =-1) {Processor_count_ = Get_processor_number ();    } getsystemtimeasfiletime (&now);    HANDLE hprocess = OpenProcess (Process_all_access, FALSE, PID); if (!    Getthreadtimes (hand, &creation_time, &exit_time, &kernel_time, &user_time)) {return-1;    } System_time = (FILE_TIME_2_UTC (&kernel_time) + FILE_TIME_2_UTC (&user_time))/Processor_count_;    Time = FILE_TIME_2_UTC (&now); if ((last_system_time_ = = 0) | |    (last_time_ = = 0))        {last_system_time_ = System_time;        Last_time_ = time;    return-1;    } System_time_delta = System_time-last_system_time_;    Time_delta = time-last_time_;    if (Time_delta = = 0) return-1;    CPU = (int) ((System_time_delta * + TIME_DELTA/2)/Time_delta); Last_system_time_ = SyStem_time;    Last_time_ = time; return CPU;} CPU utilization is sine-realized const double SPLIT = 0.01;const int COUNT = 200;const double PI = 3.14159265;const int INTERVAL = 300;  UINT Threadfunt () {DWORD busyspan[count];  Array of busy times DWORD Idlespan[count];    Array of idle times 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;} int main (int argc, char* argv[]) {HANDLE M,c;dword threadid;int i=0;//Let the process run on the specified processor Setprocessaffinitymask ( GetCurrentProcess (), 0x00000001//cpu mask); m=getcurrentprocess ();//c=createthread (null,//0,//(lpthread_s Tart_routine) threadfunt,//null,//0,//&threadid); Sleep (C=createthread) (null,0, (lpthread_start_routine) Threadfunt,null,0,&threadid), while (i<200) { Sleep;p rintf ("cpu:%d%% thread:%d%%\n", Get_cpu_usage (M), Get_thread_cpu_usage (c)); i++;} printf ("Hello world!\n"); return 0;}

CPU utilization is sinusoidal, and CPU utilization of real-time output processes and threads