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get memory usage in KB?

Posted on 2003-12-02
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Last Modified: 2012-06-22
Hi ,
i am trying to get the memory usage of each running process in KB(similar to the task manager in windows NT)
for this i found the following code in previous post:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/perfmon/base/collecting_memory_usage_information_for_a_process.asp

But the output i get is in the following format:
Process ID: 600
        PageFaultCount: 0x000000F7
        PeakWorkingSetSize: 0x000F9000
        WorkingSetSize: 0x000F9000
        QuotaPeakPagedPoolUsage: 0x00002BFC
        QuotaPagedPoolUsage: 0x00002AC0
        QuotaPeakNonPagedPoolUsage: 0x000006A4
        QuotaNonPagedPoolUsage: 0x00000684
        PagefileUsage: 0x0003B000
        PeakPagefileUsage: 0x0003B000

How can i get memory usage in KB format?

The code is given below:

#include "stdafx.h"
#define _WIN32_WINNT 0x0400//0x0501
#include <windows.h>
#include <stdio.h>
#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: 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 );
}


int _tmain(int argc, _TCHAR* argv[])
{
   // Get the list of process identifiers.

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

   if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
       return 0;

   // 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] );



   return 0;





Thanks.
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Question by:saifnawaz
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7 Comments
 
LVL 86

Expert Comment

by:jkr
Comment Utility
>>How can i get memory usage in KB format?

You need to replace the '0x%08X' format specifier with '%d' - the values are already given in KB.
0
 

Author Comment

by:saifnawaz
Comment Utility
hi,
I did replace it with %d and the result is:
Process ID: 8
        PageFaultCount: 2529
        PeakWorkingSetSize: 651264
        WorkingSetSize: 217088
        QuotaPeakPagedPoolUsage: 0
        QuotaPagedPoolUsage: 0
        QuotaPeakNonPagedPoolUsage
        QuotaNonPagedPoolUsage: 0
        PagefileUsage: 24576
        PeakPagefileUsage: 172032

how do i get the mem usage of the process form this which is equal to the current mem usage of the process in task manager.Can i calculate the memusage from the above values?
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LVL 86

Expert Comment

by:jkr
Comment Utility
For that purpose, I wouldn't use the above - the following is a bit easier:

MEMORYSTATUS ms;

GlobalMemoryStatus ( &ms);

DWORD dwMemUsage = ms.dwTotalVirtual - ms.dwAvailVirtual;

From teh docs:

dwTotalVirtual
Indicates the total number of bytes that can be described in the user mode portion of the virtual address space of the calling process.


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Author Comment

by:saifnawaz
Comment Utility
But will this give me the memory used by all the running processes?
I need to get the memory usage of all the running processes from my code
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Author Comment

by:saifnawaz
Comment Utility
By all the running processes, i mean the memory used by each process running
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Accepted Solution

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jkr earned 250 total points
Comment Utility
Ooops, that works for the calling process only - actually, the total memory usage is the working set (virtual pages resident in physical memory) size plus the page file usage, IOW pmc.WorkingSetSize + pmc.PagefileUsage

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Author Comment

by:saifnawaz
Comment Utility
hmm i seem to have got it
the values given are bytes and the memory used is basically the workings set size
i got the values in kb by (workings set size/1024)
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