test_memusage.cxx File Reference

#include "WireCellUtil/MemUsage.h"
#include <iostream>
#include <sstream>
#include <vector>

Go to the source code of this file.

Functions
int *	suck (MemUsage &mu, long siz)
void	blow (MemUsage &mu, int siz, int *buf)
int	main ()

Function Documentation

void blow	(	MemUsage &	mu,
		int	siz,
		int *	buf
	)

Definition at line 33 of file test_memusage.cxx.

{
    delete [] buf;
    //sleep(1);
    stringstream ss;
    ss << "freed " << siz << "K";
    cout << ss.str() << " " << mu(ss.str()) << endl;
}

int main

(

void

)

Definition at line 42 of file test_memusage.cxx.

{
    cout << "current size " << memusage_size() << endl;
    cout << "current resident " << memusage_resident() << endl;
    cout << "current shared " << memusage_shared() << endl;

    MemUsage mu;

    long sizes[] = {10, 100, 1000, 10000, 100000, 1000000, -1};
    vector<int*> bufs;
    
    int ind = 0;
    for (; sizes[ind] > 0; ++ind) {
        int* buf = suck(mu, sizes[ind]);
        bufs.push_back(buf);
    }

    for (--ind; ind >= 0; --ind) {
        blow(mu, sizes[ind], bufs[ind]);
    }

    cout << "Summary:" << endl;
    cout << mu.summary() << endl;

}

int* suck	(	MemUsage &	mu,
		long	siz
	)

Definition at line 11 of file test_memusage.cxx.

{
    int *buf = new int[siz * 1024];
    //sleep(1);
    {
        stringstream ss;
        ss << "newed " << siz << "K";
        cout << ss.str() << " " << mu(ss.str()) << endl;
    }

    for (int ind=0; ind<siz; ++ind) {
        buf[ind] = 0;
    }
    {
        stringstream ss;
        ss << "accessed " << siz << "K";
        cout << ss.str() << " " << mu(ss.str()) << endl;
    }

    return buf;
}