Link to home
Start Free TrialLog in
Avatar of saifnawaz
saifnawaz

asked on

get memory usage in KB?

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.
Avatar of jkr
jkr
Flag of Germany image

>>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.
Avatar of saifnawaz
saifnawaz

ASKER

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?
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.


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
By all the running processes, i mean the memory used by each process running
ASKER CERTIFIED SOLUTION
Avatar of jkr
jkr
Flag of Germany image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
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)