hyperthread_finder.cpp

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#include <map>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
 
using namespace std;
 
int main(int argv, char * argc[])
{
    // map (proc id, core id) to physical id
    map< pair<int, int>, int> htmap;
    pair< map< pair<int,int> ,int>::iterator, bool > ret;
 
    ifstream fin(argc[1]);
    int i=0;
    while(!fin.eof())
    {
        // processor       : 75
        // physical id     : 3
        // core id         : 2
        int proc, pid, cid; 
        string line;
        getline(fin, line);
        size_t loc1 = line.find(":");
        stringstream linestream1(line.substr(loc1+1, string::npos));
        linestream1 >> proc;
 
        getline(fin, line);
        size_t loc2 = line.find(":");
        stringstream linestream2(line.substr(loc2+1, string::npos));
        linestream2 >> pid;
 
        getline(fin, line);
        size_t loc3 = line.find(":");
        stringstream linestream3(line.substr(loc3+1, string::npos));
        linestream3 >> cid;
        
        ret = htmap.insert(map< pair<int,int>, int>::value_type(make_pair(pid,cid), proc)); 
        if (ret.second)
        {
            cout << "rank " << i++ << "=localhost slot=" << pid <<":" << cid<< endl;
        }
    }
}