C++里面获取单个进程的内存利用率

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原文地址：点击打开链接http://blog.chinaunix.net/uid-729782-id-2059813.html

可以使用以下几个函数获得系统进程的使用情况：GetProcessMemoryInfo， EnumProcesses！具体使用方法如MSDN介绍：

#include
#include
#include "psapi.h"

void PrintMemoryInfo( DWORD processID )
{
HANDLE hProcess;
PROCESS_MEMORY_COUNTERS pmc;

// Print the process identifier.

printf( "\nProcess ID: %u\n", processID );

// Print information about the memory usage of the process.

hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
  PROCESS_VM_READ,
  FALSE, processID );
if (NULL == hProcess)
  return;

if ( GetProcessMemoryInfo( hProcess, &pmc, sizeof(pmc)) )
{
  printf( "\tPageFaultCount: %d\n", pmc.PageFaultCount );
  printf( "\tPageFaultCount: 0x%08X\n", pmc.PageFaultCount );
  printf( "\tPeakWorkingSetSize: 0x%08X\n",
   pmc.PeakWorkingSetSize );
  printf( "\tWorkingSetSize: 0x%08X\n", pmc.WorkingSetSize );
  printf( "\tQuotaPeakPagedPoolUsage: 0x%08X\n",
   pmc.QuotaPeakPagedPoolUsage );
  printf( "\tQuotaPagedPoolUsage: 0x%08X\n",
   pmc.QuotaPagedPoolUsage );
  printf( "\tQuotaPeakNonPagedPoolUsage: 0x%08X\n",
   pmc.QuotaPeakNonPagedPoolUsage );
  printf( "\tQuotaNonPagedPoolUsage: 0x%08X\n",
   pmc.QuotaNonPagedPoolUsage );
  printf( "\tPagefileUsage: 0x%08X\n", pmc.PagefileUsage );
  printf( "\tPeakPagefileUsage: 0x%08X\n",
   pmc.PeakPagefileUsage );
}

CloseHandle( hProcess );
}

void main( )
{
// Get the list of process identifiers.

DWORD aProcesses[1024], cbNeeded, cProcesses;
unsigned int i;

if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
return;

// Calculate how many process identifiers were returned.

cProcesses = cbNeeded / sizeof(DWORD);

// Print the memory usage for each process

for ( i = 0; i < cProcesses; i++ )
PrintMemoryInfo( aProcesses[i] );
}

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