如何获取cpu和内存使用效率（送分了）

Question

给解释以下，大虾门

Answer 1

CPU的有难度。9x下可以查注册表，但是键值忘了。

Answer 2

找到如下程序。
NT/2000方法：// cpusagent.cpp (Windows NT/2000)
//
// Getting the CPU usage in percent on Windows NT/2000
//
// (c)2000 Ashot Oganesyan K, SmartLine, Inc
// mailto:[email protected], http://www.protect-me.com, http://www.codepile.com#include <windows.h>
#include <conio.h>
#include <stdio.h>#define SystemBasicInformation       0
#define SystemPerformanceInformation 2
#define SystemTimeInformation        3#define Li2Double(x) ((double)((x).HighPart) * 4.294967296E9 + (double)((x).LowPart))typedef struct
{
    DWORD   dwUnknown1;
    ULONG   uKeMaximumIncrement;
    ULONG   uPageSize;
    ULONG   uMmNumberOfPhysicalPages;
    ULONG   uMmLowestPhysicalPage;
    ULONG   uMmHighestPhysicalPage;
    ULONG   uAllocationGranularity;
    PVOID   pLowestUserAddress;
    PVOID   pMmHighestUserAddress;
    ULONG   uKeActiveProcessors;
    BYTE    bKeNumberProcessors;
    BYTE    bUnknown2;
    WORD    wUnknown3;
} SYSTEM_BASIC_INFORMATION;typedef struct
{
    LARGE_INTEGER   liIdleTime;
    DWORD           dwSpare[76];
} SYSTEM_PERFORMANCE_INFORMATION;typedef struct
{
    LARGE_INTEGER liKeBootTime;
    LARGE_INTEGER liKeSystemTime;
    LARGE_INTEGER liExpTimeZoneBias;
    ULONG         uCurrentTimeZoneId;
    DWORD         dwReserved;
} SYSTEM_TIME_INFORMATION;
// ntdll!NtQuerySystemInformation (NT specific!)
//
// The function copies the system information of the
// specified type into a buffer
//
// NTSYSAPI
// NTSTATUS
// NTAPI
// NtQuerySystemInformation(
//    IN UINT SystemInformationClass,    // information type
//    OUT PVOID SystemInformation,       // pointer to buffer
//    IN ULONG SystemInformationLength,  // buffer size in bytes
//    OUT PULONG ReturnLength OPTIONAL   // pointer to a 32-bit
//                                       // variable that receives
//                                       // the number of bytes
//                                       // written to the buffer 
// );
typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);PROCNTQSI NtQuerySystemInformation;
void main(void)
{
    SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo;
    SYSTEM_TIME_INFORMATION        SysTimeInfo;
    SYSTEM_BASIC_INFORMATION       SysBaseInfo;
    double                         dbIdleTime;
    double                         dbSystemTime;
    LONG                           status;
    LARGE_INTEGER                  liOldIdleTime = {0,0};
    LARGE_INTEGER                  liOldSystemTime = {0,0};    NtQuerySystemInformation = (PROCNTQSI)GetProcAddress(
                                          GetModuleHandle("ntdll"),
                                         "NtQuerySystemInformation"
                                         );    if (!NtQuerySystemInformation)
        return;    // get number of processors in the system
    status = NtQuerySystemInformation(SystemBasicInformation,&SysBaseInfo,sizeof(SysBaseInfo),NULL);
    if (status != NO_ERROR)
        return;
    
printf("\nCPU Usage (press any key to exit):    ");
    while(!_kbhit())
    {
        // get new system time
    status = NtQuerySystemInformation(SystemTimeInformation,&SysTimeInfo,sizeof(SysTimeInfo),0);
        if (status!=NO_ERROR)
            return;        // get new CPU's idle time
        status = NtQuerySystemInformation(SystemPerformanceInformation,&SysPerfInfo,sizeof(SysPerfInfo),NULL);
        if (status != NO_ERROR)
            return;        // if it's a first call - skip it
       if (liOldIdleTime.QuadPart != 0)
       {
            // CurrentValue = NewValue - OldValue
            dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(liOldIdleTime);
            dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(liOldSystemTime);            // CurrentCpuIdle = IdleTime / SystemTime
            dbIdleTime = dbIdleTime / dbSystemTime;            // CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors
            dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5;            printf("\b\b\b\b%3d%%",(UINT)dbIdleTime);
       }        // store new CPU's idle and system time
        liOldIdleTime = SysPerfInfo.liIdleTime;
        liOldSystemTime = SysTimeInfo.liKeSystemTime;

        // wait one second
        Sleep(1000);
    }
    printf("\n");
}
W9X:// cpusage9x.cpp (Windows 95/95)
//
// Getting the CPU usage in percent on Windows 9x
//
// (c)1999 Ashot Oganesyan K, SmartLine, Inc
// mailto:[email protected], http://www.protect-me.com, http://www.codepile.com#include <windows.h>
#include <conio.h>
#include <stdio.h>
void main(void)
{
    HKEY hkey;
    DWORD dwDataSize;
    DWORD dwType;
    DWORD dwCpuUsage;    // starting the counter
    if ( RegOpenKeyEx( HKEY_DYN_DATA,
                       "PerfStats\\StartStat",
                       0,KEY_ALL_ACCESS,
                       &hkey ) != ERROR_SUCCESS)
       return;    dwDataSize=sizeof(DWORD);
    RegQueryValueEx( hkey,
                     "KERNEL\\CPUUsage",
                     NULL,&dwType,
                     (LPBYTE)&dwCpuUsage,
                     &dwDataSize );    RegCloseKey(hkey);
    
    // geting current counter's value
    if ( RegOpenKeyEx( HKEY_DYN_DATA,
                       "PerfStats\\StatData",
                       0,KEY_READ,
                       &hkey ) != ERROR_SUCCESS)
       return;    printf("\nCPU Usage (press any key to exit):    ");
    while(!_kbhit())
    {
        dwDataSize=sizeof(DWORD);
        RegQueryValueEx( hkey,
                         "KERNEL\\CPUUsage",
                         NULL,&dwType,
                         (LPBYTE)&dwCpuUsage,
                         &dwDataSize );
        Sleep(500);
        printf("\b\b\b\b%3d%%",dwCpuUsage);
    }
    printf("\n");    RegCloseKey(hkey);
    
    // stoping the counter
    if ( RegOpenKeyEx( HKEY_DYN_DATA,
                       "PerfStats\\StopStat",
                       0,KEY_ALL_ACCESS,
                       &hkey ) != ERROR_SUCCESS)
       return;    dwDataSize=sizeof(DWORD);
    RegQueryValueEx( hkey,
                     "KERNEL\\CPUUsage",
                     NULL,&dwType,
                     (LPBYTE)&dwCpuUsage,
                     &dwDataSize );    RegCloseKey(hkey);
}

Answer 3

Here is a couple links for you.
http://codeguru.earthweb.com/system/perfmon.shtml

Answer 4

msdn里面有相关的代码 你去copy呀！

Answer 5

www.vckbase.com 中有详解和例子。

Answer 6

http://www.vchelp.net/vchelp/archive.asp?type_id=25&class_id=1&cata_id=2&article_id=948