win2000下如何获取CPU的占有率

[bluestar]

我用的是WIN2000+SP2，如何用VC编程获取CPU的占有率?

[zhengyun_ustc]

up...............

[panda_w]

CPU的占有率应该通过读取注册表可以得到，找一下这个下面分析：HKEY_LOCAL_MACHINE\SYSTEM

[lbqsv]

BOOL GetProcessTimes(
HANDLE hProcess, // handle to process
LPFILETIME lpCreationTime, // process creation time
LPFILETIME lpExitTime, // process exit time
LPFILETIME lpKernelTime, // process kernel-mode time
LPFILETIME lpUserTime // process user-mode time
);

[lbqsv]

这个东东也可以 Performance Monitoring

[bluestar]

system下面东西多多，具体是哪一个？

[Luck04]

gz

[bluestar]

up

[BlueTrees]

up

[zhengyun_ustc]

怎么没有人回答呀？
如果是我要想得到这个数，我第一个想到的就是WMI编程。这个最简单了，我会写一个vbs脚本，其内容为：
Option Explicit

Dim objWbem
Dim colProcessors
Dim objProcessor

Set objWbem = GetObject("winmgmts:")
Set colProcessors = objWbem.InstancesOf("Win32_Processor")

For Each objProcessor In colProcessors
WScript.Echo "Load capacity of each processor, averaged over the last second:" & _
VbCrLf & objProcessor.LoadPercentage & "%"
Next

但是用VC写出上面同样效果的代码，就比较麻烦了。

那我就会选择这么做（参见Platform SDK: Performance Monitoring），用微软提供的Performance Monitoring Function，就可以想得到什么就能够得到什么了，用C写起来也方便多了。下面就是代码：

#define UNICODE
#define _UNICODE

#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include <pdh.h>
#include <pdhmsg.h>

void
DisplayCommandLineHelp ()
{
_tprintf (TEXT("\n\nOne or more valid log names must be"));
_tprintf (TEXT("specified as a command line argument. The"));
_tprintf (TEXT("\nlog file will be in the CSV log file format."));
return;
}

int __cdecl _tmain (int argc, TCHAR **argv)
{

HQUERY hQuery;
HLOG hLog;
PDH_STATUS pdhStatus;
DWORD dwLogType = PDH_LOG_TYPE_CSV;
HCOUNTER hCounter;
CHAR szCounterPath[45] =
"\\Processor(0)\\% Processor Time";
DWORD dwCount;

if (argc != 2) {
DisplayCommandLineHelp ();
return -1;
}

// Open a query object.
pdhStatus = PdhOpenQuery (0,
0,
&hQuery);

// Add one counter that will provide the data.
pdhStatus = PdhAddCounter (hQuery,
(LPCTSTR)szCounterPath,
0,
&hCounter);

// Open the log file for write access.
pdhStatus = PdhOpenLog (argv[1],
PDH_LOG_WRITE_ACCESS |
PDH_LOG_CREATE_ALWAYS,
&dwLogType,
hQuery,
0,
NULL,
&hLog);

// Write 50 records to the log file.
for (dwCount = 0; dwCount <= 50; dwCount++) {
pdhStatus = PdhUpdateLog (hLog, TEXT("This is a comment."));
Sleep(1000); // Wait one second between samples for
// the counter to be updated.
}

// Close the query object.
pdhStatus = PdhCloseQuery (hQuery);

// Close the log file.
pdhStatus = PdhCloseLog (hLog,
PDH_FLAGS_CLOSE_QUERY);

return 0;
}