143 lines
4.5 KiB
C++
143 lines
4.5 KiB
C++
/**********************************************************
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This software is part of J.-S. Caux's ABACUS library.
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Copyright (c) J.-S. Caux.
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-----------------------------------------------------------
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File: LiebLin_Catalogue_Fixed_c_Nscaling.cc
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Purpose: Produces sets of data files for correlations, increasing system size at fixed c.
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***********************************************************/
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#include <omp.h>
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#include "ABACUS.h"
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using namespace std;
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using namespace ABACUS;
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int main(int argc, char* argv[])
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{
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if (argc != 8) { // provide some info
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cout << endl << "Welcome to ABACUS\t(copyright J.-S. Caux)." << endl;
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cout << endl << "Usage of LiebLin_Catalogue_Fixed_c_k_Nscaling executable: " << endl;
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cout << endl << "Provide the following arguments:" << endl << endl;
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cout << "char whichDSF \t\t Which structure factor should be calculated ? Options are: "
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"d for rho rho, g for psi psi{dagger}, o for psi{dagger} psi" << endl;
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cout << "DP c_int \t\t Value of the interaction parameter: use positive real values only" << endl;
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cout << "int kfactmax \t\t max momentum factor: max momentum will be set to kfact * kF/4" << endl;
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cout << "DP kBT \t\t Temperature (positive only of course)" << endl;
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cout << "DP target_sumrule \t sumrule saturation you're satisfied with" << endl;
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cout << "int Hrs \t\t Allowed computational time (hours)" << endl;
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cout << "int Mns \t\t Allowed computational time (minutes)" << endl;
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}
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else { // correct nr of arguments
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int ia = 1;
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char whichDSF = *argv[ia++];
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DP c_int = atof(argv[ia++]);
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int kfact = atoi(argv[ia++]);
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DP kBT = atof(argv[ia++]);
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DP target_sumrule = atof(argv[ia++]);
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int Max_Secs = 3600*atoi(argv[ia++]) + 60*atoi(argv[ia++]);
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double StartTime = omp_get_wtime();
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double ActualTime = omp_get_wtime();
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int Secs_left = Max_Secs;
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int iN = 0;
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int nN = 16;
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Vect<int> Nv(nN);
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// Multiples of 32 up to 256
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for (int i = 1; i <= 8; ++i) Nv[i-1] = 32*i;
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// Then steps of 64 up to 512
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for (int i = 1; i <= 4; ++i) Nv[7+i] = 256 + 64*i;
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// Then steps of 128 up to 1024
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for (int i = 1; i <= 4; ++i) Nv[11+i] = 512 + 128*i;
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for (int iN = 0; iN < nN; ++iN) {
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int N = Nv[iN];
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DP L = N;
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int iKmin = 0;
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int iKmax = (kfact * N)/8;
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DP srsat = 0.0;
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bool refine = false;
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stringstream SRC_stringstream; string SRC_string;
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Data_File_Name (SRC_stringstream, whichDSF, c_int, L, N, iKmin, iKmax, kBT, 0.0, "");
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SRC_stringstream << ".src";
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SRC_string = SRC_stringstream.str(); const char* SRC_Cstr = SRC_string.c_str();
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fstream srcfile;
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srcfile.open(SRC_Cstr, fstream::in);
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if (srcfile.fail()) {
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srsat = 0.0;
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refine = false;
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}
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else {
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srcfile >> srsat;
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refine = true;
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}
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srcfile.close();
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ActualTime = omp_get_wtime();
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Secs_left = int(Max_Secs - (ActualTime - StartTime));
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Scan_Info resulting_info;
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if (srsat < target_sumrule && Secs_left > Max_Secs/2) {
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// Improve the icmin calculation by one chunk:
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cout << "---\nTime left = " << Secs_left << " seconds." << endl;
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if (srsat > 0) {
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cout << "Continue with N = " << N << ". Sumrule previously achieved: " << srsat << endl;
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} else {
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cout << "Start with N = " << N << "." << endl;
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}
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resulting_info = Scan_LiebLin (whichDSF, c_int, L, N, iKmin, iKmax, kBT,
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Secs_left, target_sumrule, refine);
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cout << "Done with N = " << N
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<< ". Sumrule obtained: " << resulting_info.sumrule_obtained
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<< endl;
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}
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if (resulting_info.sumrule_obtained > target_sumrule) {
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// Move files to storage, keeping a copy of the .src file in the current directory
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string command1 = "mkdir -p ../store/data/N_" + to_string(N);
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system(command1.c_str());
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string command2 = "mv *_N_" + to_string(N) + "* ../store/data/N_" + to_string(N) + "/";
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system(command2.c_str());
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string command3 = "cp ../store/data/N_" + to_string(N) + "/*src .";
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system(command3.c_str());
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}
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ActualTime = omp_get_wtime();
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Secs_left = int(Max_Secs - (ActualTime - StartTime));
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if (Secs_left < 30) {
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if (resulting_info.sumrule_obtained > target_sumrule) {
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cout << "---\nBreaking out after completing N = " << N
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<< " since time left = " << Secs_left << " seconds." << endl;
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}
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else {
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cout << "---\nBreaking out while working on N = " << N
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<< " since allocated time is exhausted." << endl;
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}
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break;
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}
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} // while there is time
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} // else if arguments given OK
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return(0);
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}
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