double
twoSiteDMRG(Environment const& mpienv,
Hubbard& sites,
IQMPS& psi,
std::vector<IQMPO>const& Hs,
Sweeps const& sweeps,
Args const& args)
{
auto L = sites.N();
auto nSweeps = sweeps.nsweep();
psi.position(1);
mpienv.barrier();
std::vector<EnvironmentHandler<IQTensor>*> handlerLeft;
std::vector<EnvironmentHandler<IQTensor>*> handlerRight;
std::for_each(Hs.begin(), Hs.end(), [&] (IQMPO const& element) {
auto left = new EnvironmentHandler<IQTensor>(element, psi, Left, 0, false);
handlerLeft.push_back(left);
auto right = new EnvironmentHandler<IQTensor>(element, psi, Right, 3, false);
handlerRight.push_back(right);
});
mpienv.barrier();
auto forN = AutoMPO(sites); for(int j = 1; j <= L; ++j) { forN += 1,"Ntot",j; } MPOt<IQTensor> N(forN);
auto forSz = AutoMPO(sites); for(int j = 1; j <= L; ++j) { forSz += 1,"Sz",j; } MPOt<IQTensor> Sz(forSz);
double nVal = itensor::overlap(psi, N, psi);
double szVal = itensor::overlap(psi, Sz, psi);
std::cout << "L " << L << " N " << nVal << " Sz" << szVal << std::endl;
double lastExpec = 0;
double minExpec;
IQMPS minState;
std::for_each(Hs.begin(), Hs.end(), [&] (IQMPO const& element) { lastExpec += overlap(psi, element, psi); });
lastExpec = sum(mpienv, lastExpec);
if (mpienv.rank() == 0) {
printStatus(-1, 0, L, lastExpec, 0, szVal, nVal, maxM(psi));
double minExpec = lastExpec;
minState = psi;
}
vector<Direction> directions {Fromleft, Fromright};
for (int nS = 1; nS <= nSweeps; ++nS)
{
Args args;
args.add("Cutoff",sweeps.cutoff(nS));
args.add("Maxm",sweeps.maxm(nS));
args.add("Minm",sweeps.minm(nS));
args.add("Niter",sweeps.niter(nS));
args.add("Noise",sweeps.noise(nS));
for (Direction &dir : directions)
{
int start = dir==Fromleft?1:L-1;
int end = dir==Fromleft?L-1:1;
for (int i = start; dir == Fromleft ? i < end : i > end; dir == Fromleft ? i++ : i--)
{
IQTensor guess = psi.A(i) * psi.A(i+1);
std::vector<IQTensor> leftEn;
std::vector<IQTensor> rightEn;
std::vector<IQTensor> leftH;
std::vector<IQTensor> rightH;
std::for_each(handlerLeft.begin(), handlerLeft.end(),
[&] (EnvironmentHandler<IQTensor>* handler) {
leftEn.push_back(handler->currentElement());
});
std::for_each(handlerRight.begin(), handlerRight.end(),
[&] (EnvironmentHandler<IQTensor>* handler) {
rightEn.push_back(handler->currentElement());
});
std::for_each(Hs.begin(), Hs.end(), [&] (IQMPO const& H) {
leftH.push_back(H.A(i));
rightH.push_back(H.A(i+1));
});
LocalHSum<IQTensor> lop(leftH, rightH, leftEn, rightEn);
double expec = MPI_davidson(mpienv, lop, guess, args);
mpienv.barrier();
if (i == 1) { MPI_insertBond(mpienv, psi, i, Fromleft, guess, leftEn, leftH, rightH, rightEn, args); }
else if (i + 1 == L) { MPI_insertBond(mpienv, psi, i, Fromright, guess, leftEn, leftH, rightH, rightEn, args); }
else { MPI_insertBond(mpienv, psi, i, dir, guess, leftEn, leftH, rightH, rightEn, args); }
if (mpienv.rank() == 0)
{
double nVal = itensor::overlap(psi, N, psi);
double szVal = itensor::overlap(psi, Sz, psi);
printStatus(nS, i, L-i, expec, expec - lastExpec, szVal, nVal, maxM(psi));
if(expec < minExpec)
{
minExpec = expec;
minState = psi;
}
}
broadcast(mpienv, psi);
lastExpec = expec;
auto doStep = [&] (EnvironmentHandler<IQTensor>* handler) {
if (dir == Fromleft)
handler->stepToRightWithNewState(psi);
else
handler->stepToLeftWithNewState(psi);
};
std::for_each(handlerLeft.begin(), handlerLeft.end(), doStep);
std::for_each(handlerRight.begin(), handlerRight.end(), doStep);
}
if (dir == Fromright && mpienv.rank() == 0)
printOutIO((boost::format("-------------------- Finished Sweep %s of %s ----------------------\n") % nS % nSweeps).str() );
}
}
std::for_each(handlerLeft.begin(), handlerLeft.end(), [] (EnvironmentHandler<IQTensor>* el) { delete(el); });
std::for_each(handlerRight.begin(), handlerRight.end(), [] (EnvironmentHandler<IQTensor>* el) { delete(el); });
psi = minState;
return minExpec;
}
int main(int argc, char **argv) {
QTextStream qout(stdout, QIODevice::WriteOnly);
QTextStream qerr(stderr, QIODevice::WriteOnly);
QTextStream qin(stdin, QIODevice::ReadOnly);
Args args;
args.add(new Arg("h", "help", Arg::setTrue, QVariant(false)));
args.add(new Arg("v", "verbose", Arg::setTrue, QVariant(false)));
//args.add(new Arg("i", "input-file", Arg::readableFile, QVariant("/var/log/postgresql.log")));
args.add(new Arg("i", "input-file", Arg::readableFile,
QVariant("/var/log/postgresql/postgresql-9.1-main.log")));
args.add(new Arg("o", "output-file", Arg::writableFile,
QVariant("report.html")));
args.add(new Arg("u", "users", Arg::toString, QVariant()));
args.add(new Arg("d", "databases", Arg::toString, QVariant()));
args.add(new Arg("top", Arg::toInt, QVariant(20)));
args.add(new Arg("t", "query-types", Arg::toString,
QVariant("SELECT,UPDATE,INSERT,DELETE")));
if(!args.parse(argc, argv)) {
args.help();
return -1;
}
QStringList users = args.getStringList("users");
QStringList databases = args.getStringList("databases");
QStringList query_types = args.getStringList("query-types");
int ret;
QString line;
int start_index;
int stop_index;
int old_query_id;
int new_query_id;
int old_line_id;
int new_line_id;
QString database;
QString user;
QString statement;
uint duration;
QFile input_file;
ret = args.getFile(&input_file, "input-file", QIODevice::ReadOnly | QIODevice::Text);
if(ret)return ret;
QFile output_file;
ret = args.getFile(&output_file, "output-file", QIODevice::WriteOnly | QIODevice::Text);
if(ret)return ret;
QTextStream output(&output_file);
/* display the top N queries */
int top = args.getInt("top");
Queries queries;
old_query_id = -1;
old_line_id = -0;
statement = "";
duration = 0;
QTime timer;
timer.start();
uint lines = 0;
if(input_file.atEnd()) {
qerr << "The input file (" << input_file.fileName();
qerr << ") seems to be empty" << endl;
}
while (!input_file.atEnd()) {
line = input_file.readLine(4096);
lines++;
if(lines % 1000 == 0) {
qout << "Read " << lines << " lines." << endl;
qout.flush();
}
if(line[0] == '\t') {
statement.append(line);
continue;
}
start_index = line.indexOf("[", 15);
start_index = line.indexOf("[", start_index + 3) + 1;
stop_index = line.indexOf("-", start_index);
new_query_id = line.mid(start_index, stop_index - start_index).toInt();
start_index = stop_index + 1;
stop_index = line.indexOf("]", start_index);
new_line_id = line.mid(start_index, stop_index - start_index).toInt();
if(new_query_id != old_query_id || old_line_id < new_line_id) {
old_query_id = new_query_id;
QString hashStatement = Query::normalize(statement);
statement = Query::format(statement);
if((
hashStatement.startsWith("INSERT") ||
hashStatement.startsWith("DELETE") ||
hashStatement.startsWith("UPDATE") ||
hashStatement.startsWith("SELECT")
)
&& (!users.length() || users.contains(user))
&& (!databases.length() || databases.contains(database))) {
uint hash = qHash(hashStatement);
if(queries.contains(hash)) {
queries[hash]->addStatement(duration, statement);
} else {
queries.insert(hash, new Query(hashStatement, statement, user, database, duration));
}
}
user = "";
database = "";
duration = 0;
statement = "";
start_index = line.indexOf("user="******",", start_index);
user = line.mid(start_index, stop_index - start_index);
start_index = line.indexOf("db=", stop_index) + 3;
stop_index = line.indexOf(" ", start_index);
if(start_index == -1 || stop_index == -1)continue;
database = line.mid(start_index, stop_index - start_index);
start_index = line.indexOf("duration: ", stop_index) + 10;
stop_index = line.indexOf(" ", start_index);
duration = line.mid(start_index, stop_index - start_index).toDouble() * 1000;
start_index = line.indexOf("statement: ", stop_index) + 11;
if(start_index < stop_index)continue;
stop_index = line.length();
statement = line.mid(start_index, stop_index - start_index);
} else {
start_index = line.indexOf("] ", stop_index);
if(start_index != -1) {
start_index += 2;
stop_index = line.length() - start_index;
statement.append(line.mid(start_index, line.length() - start_index));
}
}
}
QFile header(":templates/header.html");
if (!header.open(QIODevice::ReadOnly | QIODevice::Text)) {
qout << "Unable to open templates/header.html" << endl;
return -4;
} else {
output << header.readAll();
header.close();
}
QList<Query*> queries_sorted;
output << QString("<div class=\"information\">"
"<ul>"
"<li>Generated on %1</li>"
"<li>Parsed %2 (%3 lines) in %4 ms</li>"
"</ul>"
"</div>") \
.arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss")) \
.arg(args.getString("input_file")) \
.arg(lines) \
.arg(timer.elapsed());
output << "<div class=\"reports\">";
output << "<h2 id=\"NormalizedQueriesMostTimeReport\">Queries that took up the most time (N) <a href=\"#top\" title=\"Back to top\">^</a></h2>";
output << print_queries(queries.sortedQueries(Queries::mostTotalDuration), top);
output << "<h2 id=\"NormalizedQueriesMostFrequentReport\">Most frequent queries (N) <a href=\"#top\" title=\"Back to top\">^</a></h2>";
output << print_queries(queries.sortedQueries(Queries::mostExecutions), top);
output << "<h2 id=\"NormalizedQueriesSlowestAverageReport\">Slowest queries (N) <a href=\"#top\" title=\"Back to top\">^</a></h2>";
output << print_queries(queries.sortedQueries(Queries::mostAverageDuration), top);
QFile footer(":templates/footer.html");
if (!footer.open(QIODevice::ReadOnly | QIODevice::Text)) {
qout << "Unable to open templates/footer.html" << endl;
return -5;
} else {
output << footer.readAll();
footer.close();
}
qout << "Wrote to file " << args.getString("output-file") << endl;
}
