How to write a simple "page error generator"?

Question

In my course project on the Linux kernel, I need to simulate a situation where, due to low memory, there is part of the page exchange .

I want to write a program that requires a lot of physical memory, so that the pages accessed by this program should change and change several times.

Answer 1

Because of this, first of all, you really need to allocate a buffer that is larger than your RAM. I hope that you are running a 64-bit OS or that you have PAE enabled. If we say 4 GB of RAM, you need something like:

double* pBigArray = (double*)malloc(sizeof(double) * 536870912); 
// You actually need more than that. This is just 4GB.

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double lfBigChecksum = 0.0;
while (true)
{
   int iIndex = rand() % BUFFER_SIZE;
   lfBigChecksum += pBigArray[iIndex];
}

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Answer 2

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int *foo = new int[10000000];

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