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louvain.cpp
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louvain.cpp
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#include "louvain.hpp"
#include <cstring>
#include <sstream>
#include "locks.hpp"
GraphWeight distLouvainMethod(const int me, const int nprocs, const DistGraph &dg,
size_t &ssz, size_t &rsz,
std::vector<GraphElem> &ssizes, std::vector<GraphElem> &rsizes,
std::vector<GraphElem> &svdata, std::vector<GraphElem> &rvdata,
CommunityVector &cvect, const GraphWeight lower, const GraphWeight thresh,
int& iters, bool ETLocalOrRemote)
{
CommunityVector pastComm, currComm, targetComm;
GraphWeightVector vDegree;
GraphWeightVector clusterWeight, frozenClusterWeight;
CommVector localCinfo, localCupdate;
VertexCommMap remoteComm;
CommMap remoteCinfo, remoteCupdate;
const Graph &g = dg.getLocalGraph();
const GraphElem tnv = dg.getTotalNumVertices();
const GraphElem nv = g.getNumVertices();
const GraphElem ne = g.getNumEdges();
const GraphWeight threshMod = thresh;
GraphWeight constantForSecondTerm;
GraphWeight prevMod = lower;
GraphWeight currMod = -1.0;
int numIters = 0;
// initializations
distInitLouvain(dg, pastComm, currComm, vDegree, clusterWeight, localCinfo,
localCupdate, constantForSecondTerm, me);
targetComm.resize(nv);
// for frozen vertices
frozenClusterWeight.resize(nv);
std::vector<bool> vActive;
vActive.resize(nv);
std::fill(vActive.begin(), vActive.end(), true);
#ifdef DEBUG_PRINTF
ofs << "constantForSecondTerm: " << constantForSecondTerm << std::endl;
#endif
const GraphElem base = dg.getBase(me), bound = dg.getBound(me);
#ifdef DEBUG_PRINTF
double t0, t1;
t0 = MPI_Wtime();
#endif
exchangeVertexReqs(dg, ssz, rsz, ssizes, rsizes,
svdata, rvdata, me, nprocs);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Initial communication setup time: " << (t1 - t0) << std::endl;
#endif
while(true) {
#ifdef DEBUG_PRINTF
const double t2 = MPI_Wtime();
ofs << "Starting iteration: " << numIters << std::endl;
#endif
numIters++;
long vc_count = 0;
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
fillRemoteCommunities(dg, me, nprocs, ssz, rsz, ssizes,
rsizes, svdata, rvdata, currComm, localCinfo,
remoteCinfo, remoteComm, remoteCupdate);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Remote community map size: " << remoteComm.size() << std::endl;
ofs << "Iteration communication time: " << (t1 - t0) << std::endl;
#endif
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
#pragma omp parallel default(none), shared(clusterWeight, localCupdate, currComm, targetComm, \
vDegree, localCinfo, remoteCinfo, remoteComm, pastComm, dg, remoteCupdate, \
frozenClusterWeight, vActive), firstprivate(constantForSecondTerm) \
reduction(+: vc_count)
{
distCleanCWandCU(nv, clusterWeight, localCupdate);
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp for schedule(runtime)
#else
#pragma omp for schedule(guided)
#endif
for (GraphElem i = 0; i < nv; i++) {
if (!vActive[i]) {
clusterWeight[i] = frozenClusterWeight[i];
vc_count++;
continue;
}
else
{
distExecuteLouvainIteration(i, dg, currComm, targetComm, vDegree, localCinfo,
localCupdate, remoteComm, remoteCinfo, remoteCupdate,
constantForSecondTerm, clusterWeight, me);
frozenClusterWeight[i] = clusterWeight[i];
}
}
}
if (!ETLocalOrRemote) {
MPI_Allreduce(MPI_IN_PLACE, &vc_count, 1, MPI_LONG, MPI_SUM, MPI_COMM_WORLD);
GraphWeight perc = 100.0 * ((GraphWeight)(tnv-vc_count)/(GraphWeight)tnv);
if (vc_count >= ET_CUTOFF) {
currMod = -1;
break;
}
}
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Iteration computation time: " << (t1 - t0) << std::endl;
t0 = MPI_Wtime();
#endif
#pragma omp parallel default(none), shared(localCinfo, localCupdate)
{
distUpdateLocalCinfo(localCinfo, localCupdate);
}
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
updateRemoteCommunities(dg, localCinfo, remoteCupdate, me, nprocs);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Update remote communities communication time: " << (t1 - t0) << std::endl;
t0 = MPI_Wtime();
#endif
currMod = distComputeModularity(g, localCinfo, clusterWeight, constantForSecondTerm, me);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Modularity computation + communication time: " << (t1 - t0) << std::endl;
#endif
if ((currMod - prevMod) < threshMod){
#ifdef DEBUG_PRINTF
ofs << "Break here - no updates " << std::endl;
#endif
break;
}
prevMod = currMod;
if (prevMod < lower)
prevMod = lower;
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for default(none), \
shared(pastComm, currComm, targetComm, vActive) \
firstprivate(numIters) schedule(runtime)
#else
#pragma omp parallel for default(none), \
shared(pastComm, currComm, targetComm, vActive) \
firstprivate(numIters) schedule(static)
#endif
for (GraphElem i = 0; i < nv; i++) {
if (numIters > 2
&& (targetComm[i] == currComm[i] == pastComm[i]))
vActive[i] = false;
else {
GraphElem tmp = pastComm[i];
pastComm[i] = currComm[i];
currComm[i] = targetComm[i];
targetComm[i] = tmp;
}
}
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Update local communities time: " << (t1 - t0) << std::endl;
ofs << "Total iteration time: " << (t1 - t2) << std::endl;
#endif
};
cvect = pastComm;
iters = numIters;
vActive.clear();
frozenClusterWeight.clear();
vDegree.clear();
pastComm.clear();
currComm.clear();
targetComm.clear();
clusterWeight.clear();
localCinfo.clear();
localCupdate.clear();
return prevMod;
} // distLouvainMethod with early termination
GraphWeight distLouvainMethod(const int me, const int nprocs,
const DistGraph &dg, size_t &ssz, size_t &rsz,
std::vector<GraphElem> &ssizes, std::vector<GraphElem> &rsizes,
std::vector<GraphElem> &svdata, std::vector<GraphElem> &rvdata,
CommunityVector &cvect, const GraphWeight lower, const GraphWeight thresh,
int& iters, GraphWeight ETDelta, bool ETLocalOrRemote)
{
CommunityVector pastComm, currComm, targetComm;
GraphWeightVector vDegree;
GraphWeightVector clusterWeight, frozenClusterWeight;
CommVector localCinfo, localCupdate;
VertexCommMap remoteComm;
CommMap remoteCinfo, remoteCupdate;
const Graph &g = dg.getLocalGraph();
const GraphElem tnv = dg.getTotalNumVertices();
const GraphElem nv = g.getNumVertices();
const GraphElem ne = g.getNumEdges();
const GraphWeight threshMod = thresh;
GraphWeight constantForSecondTerm;
GraphWeight prevMod = lower;
GraphWeight currMod = -1.0;
int numIters = 0;
// initializations
distInitLouvain(dg, pastComm, currComm, vDegree, clusterWeight, localCinfo,
localCupdate, constantForSecondTerm, me);
targetComm.resize(nv);
// for frozen vertices
frozenClusterWeight.resize(nv);
std::vector<bool> vActive;
vActive.resize(nv);
// vertex probabilities for current and previous iteration
std::vector<GraphWeight> p_curr, p_prev;
p_curr.resize(nv);
p_prev.resize(nv);
std::fill(vActive.begin(), vActive.end(), true);
std::fill(p_prev.begin(), p_prev.end(), 1.0);
#ifdef DEBUG_PRINTF
ofs << "constantForSecondTerm: " << constantForSecondTerm << std::endl;
#endif
const GraphElem base = dg.getBase(me), bound = dg.getBound(me);
#ifdef DEBUG_PRINTF
double t0, t1;
t0 = MPI_Wtime();
#endif
exchangeVertexReqs(dg, ssz, rsz, ssizes, rsizes,
svdata, rvdata, me, nprocs);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Initial communication setup time: " << (t1 - t0) << std::endl;
#endif
while(true) {
#ifdef DEBUG_PRINTF
const double t2 = MPI_Wtime();
ofs << "Starting iteration: " << numIters << std::endl;
#endif
numIters++;
long vc_count = 0;
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
fillRemoteCommunities(dg, me, nprocs, ssz, rsz, ssizes,
rsizes, svdata, rvdata, currComm, localCinfo,
remoteCinfo, remoteComm, remoteCupdate);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Remote community map size: " << remoteComm.size() << std::endl;
ofs << "Iteration communication time: " << (t1 - t0) << std::endl;
#endif
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
#pragma omp parallel default(none), shared(clusterWeight, localCupdate, currComm, targetComm, \
vDegree, localCinfo, remoteCinfo, remoteComm, pastComm, dg, remoteCupdate, \
frozenClusterWeight, vActive), firstprivate(constantForSecondTerm) \
reduction(+: vc_count)
{
distCleanCWandCU(nv, clusterWeight, localCupdate);
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp for schedule(runtime)
#else
#pragma omp for schedule(guided)
#endif
for (GraphElem i = 0; i < nv; i++) {
if (!vActive[i]) {
clusterWeight[i] = frozenClusterWeight[i];
vc_count++;
continue;
}
else
{
distExecuteLouvainIteration(i, dg, currComm, targetComm, vDegree, localCinfo,
localCupdate, remoteComm, remoteCinfo, remoteCupdate,
constantForSecondTerm, clusterWeight, me);
frozenClusterWeight[i] = clusterWeight[i];
}
}
}
if (!ETLocalOrRemote) {
MPI_Allreduce(MPI_IN_PLACE, &vc_count, 1, MPI_LONG, MPI_SUM, MPI_COMM_WORLD);
GraphWeight perc = 100.0 * ((GraphWeight)(tnv-vc_count)/(GraphWeight)tnv);
if (vc_count >= ET_CUTOFF) {
currMod = -1;
break;
}
}
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Iteration computation time: " << (t1 - t0) << std::endl;
t0 = MPI_Wtime();
#endif
#pragma omp parallel default(none), shared(localCinfo, localCupdate)
{
distUpdateLocalCinfo(localCinfo, localCupdate);
}
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
updateRemoteCommunities(dg, localCinfo, remoteCupdate, me, nprocs);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Update remote communities communication time: " << (t1 - t0) << std::endl;
t0 = MPI_Wtime();
#endif
currMod = distComputeModularity(g, localCinfo, clusterWeight, constantForSecondTerm, me);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Modularity computation + communication time: " << (t1 - t0) << std::endl;
#endif
if ((currMod - prevMod) < threshMod){
#ifdef DEBUG_PRINTF
ofs << "Break here - no updates " << std::endl;
#endif
break;
}
prevMod = currMod;
if (prevMod < lower)
prevMod = lower;
const GraphWeight one_minus_delta = (1.0 - ETDelta);
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for default(none), \
shared(pastComm, currComm, targetComm, vActive, p_curr, p_prev) \
firstprivate(numIters, one_minus_delta) schedule(runtime)
#else
#pragma omp parallel for default(none), \
shared(pastComm, currComm, targetComm, vActive, p_curr, p_prev) \
firstprivate(numIters, one_minus_delta) schedule(static)
#endif
for (GraphElem i = 0; i < nv; i++) {
if (!vActive[i])
continue;
if (numIters > 2 && (currComm[i] == pastComm[i])) {
p_curr[i] = p_prev[i]*one_minus_delta;
if (p_curr[i] <= P_CUTOFF)
vActive[i] = false;
}
if (vActive[i])
{
GraphElem tmp = pastComm[i];
pastComm[i] = currComm[i];
currComm[i] = targetComm[i];
targetComm[i] = tmp;
}
}
// swap p_active k, k-1 iteration
std::swap(p_curr, p_prev);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Update local communities time: " << (t1 - t0) << std::endl;
ofs << "Total iteration time: " << (t1 - t2) << std::endl;
#endif
};
cvect = pastComm;
iters = numIters;
p_curr.clear();
p_prev.clear();
vActive.clear();
frozenClusterWeight.clear();
vDegree.clear();
pastComm.clear();
currComm.clear();
targetComm.clear();
clusterWeight.clear();
localCinfo.clear();
localCupdate.clear();
return prevMod;
} // distLouvainMethod with early termination probabilities
GraphWeight distLouvainMethod(const int me, const int nprocs, const DistGraph &dg,
size_t &ssz, size_t &rsz,
std::vector<GraphElem> &ssizes, std::vector<GraphElem> &rsizes,
std::vector<GraphElem> &svdata, std::vector<GraphElem> &rvdata,
CommunityVector &cvect, const GraphWeight lower, const GraphWeight thresh,
int& iters)
{
CommunityVector pastComm, currComm, targetComm;
GraphWeightVector vDegree;
GraphWeightVector clusterWeight;
CommVector localCinfo, localCupdate;
VertexCommMap remoteComm;
CommMap remoteCinfo, remoteCupdate;
const Graph &g = dg.getLocalGraph();
const GraphElem tnv = dg.getTotalNumVertices();
const GraphElem nv = g.getNumVertices();
const GraphElem ne = g.getNumEdges();
const GraphWeight threshMod = thresh;
GraphWeight constantForSecondTerm;
GraphWeight prevMod = lower;
GraphWeight currMod = -1.0;
int numIters = 0;
distInitLouvain(dg, pastComm, currComm, vDegree, clusterWeight, localCinfo,
localCupdate, constantForSecondTerm, me);
targetComm.resize(nv);
#ifdef DEBUG_PRINTF
ofs << "constantForSecondTerm: " << constantForSecondTerm << std::endl;
#endif
const GraphElem base = dg.getBase(me), bound = dg.getBound(me);
#ifdef DEBUG_PRINTF
double t0, t1;
t0 = MPI_Wtime();
#endif
exchangeVertexReqs(dg, ssz, rsz, ssizes, rsizes,
svdata, rvdata, me, nprocs);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Initial communication setup time: " << (t1 - t0) << std::endl;
#endif
while(true) {
#ifdef DEBUG_PRINTF
const double t2 = MPI_Wtime();
ofs << "Starting iteration: " << numIters << std::endl;
#endif
numIters++;
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
fillRemoteCommunities(dg, me, nprocs, ssz, rsz, ssizes,
rsizes, svdata, rvdata, currComm, localCinfo,
remoteCinfo, remoteComm, remoteCupdate);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Remote community map size: " << remoteComm.size() << std::endl;
ofs << "Iteration communication time: " << (t1 - t0) << std::endl;
#endif
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
MPI_Barrier(MPI_COMM_WORLD);
#pragma omp parallel default(none), shared(clusterWeight, localCupdate, currComm, targetComm, \
vDegree, localCinfo, remoteCinfo, remoteComm, pastComm, dg, remoteCupdate), \
firstprivate(constantForSecondTerm)
{
distCleanCWandCU(nv, clusterWeight, localCupdate);
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp for schedule(runtime)
#else
#pragma omp for schedule(guided)
#endif
for (GraphElem i = 0; i < nv; i++) {
distExecuteLouvainIteration(i, dg, currComm, targetComm, vDegree, localCinfo,
localCupdate, remoteComm, remoteCinfo, remoteCupdate,
constantForSecondTerm, clusterWeight, me);
}
}
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Iteration computation time: " << (t1 - t0) << std::endl;
t0 = MPI_Wtime();
#endif
#pragma omp parallel default(none), shared(localCinfo, localCupdate)
{
distUpdateLocalCinfo(localCinfo, localCupdate);
}
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
updateRemoteCommunities(dg, localCinfo, remoteCupdate, me, nprocs);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Update remote communities communication time: " << (t1 - t0) << std::endl;
t0 = MPI_Wtime();
#endif
currMod = distComputeModularity(g, localCinfo, clusterWeight, constantForSecondTerm, me);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Modularity computation + communication time: " << (t1 - t0) << std::endl;
#endif
if ((currMod - prevMod) < threshMod) {
#ifdef DEBUG_PRINTF
ofs << "Break here - no updates " << std::endl;
#endif
break;
}
prevMod = currMod;
if (prevMod < lower)
prevMod = lower;
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for default(none) \
shared(pastComm, currComm, targetComm) \
schedule(runtime)
#else
#pragma omp parallel for default(none) \
shared(pastComm, currComm, targetComm) \
schedule(static)
#endif
for (GraphElem i = 0; i < nv; i++) {
GraphElem tmp = pastComm[i];
pastComm[i] = currComm[i];
currComm[i] = targetComm[i];
targetComm[i] = tmp;
}
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Update local communities time: " << (t1 - t0) << std::endl;
ofs << "Total iteration time: " << (t1 - t2) << std::endl;
#endif
};
cvect = pastComm;
iters = numIters;
vDegree.clear();
pastComm.clear();
currComm.clear();
targetComm.clear();
clusterWeight.clear();
localCinfo.clear();
localCupdate.clear();
return prevMod;
} // distLouvainMethod plain
#ifdef RUNONGPU
GraphWeight distLouvainMethod(const int me, const int nprocs, const DistGraph &dg,
size_t &ssz, size_t &rsz,
std::vector<GraphElem> &ssizes, std::vector<GraphElem> &rsizes,
std::vector<GraphElem> &svdata, std::vector<GraphElem> &rvdata,
CommunityVector &cvect, const GraphWeight lower, const GraphWeight thresh,
int& iters, GpuGraph &gpu_graph)
{
const GraphElem numGhosts = dg.getNumGhosts(me);
CommunityVector pastComm, currComm, targetComm;
GraphWeightVector vDegree;
GraphWeightVector clusterWeight;
CommVector localCinfo, localCupdate;
VertexCommMap remoteComm;
CommMap remoteCinfo, remoteCupdate;
const Graph &g = dg.getLocalGraph();
const GraphElem tnv = dg.getTotalNumVertices();
const GraphElem nv = g.getNumVertices();
const GraphElem ne = g.getNumEdges();
const GraphWeight threshMod = thresh;
GraphWeight constantForSecondTerm;
GraphWeight prevMod = lower;
GraphWeight currMod = -1.0;
int numIters = 0;
distInitLouvain(dg, pastComm, currComm, vDegree, clusterWeight, localCinfo,
localCupdate, constantForSecondTerm, me);
targetComm.resize(nv);
#ifdef DEBUG_PRINTF
ofs << "constantForSecondTerm: " << constantForSecondTerm << std::endl;
#endif
const GraphElem base = dg.getBase(me), bound = dg.getBound(me);
#ifdef DEBUG_PRINTF
double t0, t1;
t0 = MPI_Wtime();
#endif
exchangeVertexReqs(dg, ssz, rsz, ssizes, rsizes,
svdata, rvdata, me, nprocs);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Initial communication setup time: " << (t1 - t0) << std::endl;
#endif
while(true) {
#ifdef DEBUG_PRINTF
const double t2 = MPI_Wtime();
ofs << "Starting iteration: " << numIters << std::endl;
#endif
numIters++;
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
fillRemoteCommunities(dg, me, nprocs, ssz, rsz, ssizes,
rsizes, svdata, rvdata, currComm, localCinfo,
remoteCinfo, remoteComm, remoteCupdate);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Remote community map size: " << remoteComm.size() << std::endl;
ofs << "Iteration communication time: " << (t1 - t0) << std::endl;
#endif
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
MPI_Barrier(MPI_COMM_WORLD);
// if( me == 0 ) std::cout << "=== ITERATION: " << numIters << std::endl;
distCleanCWandCU(nv, clusterWeight, localCupdate);
assert( gpu_for_louvain_iteration(
nv, dg, currComm, targetComm, vDegree, localCinfo,
localCupdate, remoteComm, remoteCinfo, remoteCupdate,
constantForSecondTerm, clusterWeight, me, numIters, gpu_graph));
// if(me == 0) std::cout << "nv[" << nv << "]; Line["
// << __LINE__ << "]" << std::endl;
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Iteration computation time: " << (t1 - t0) << std::endl;
t0 = MPI_Wtime();
#endif
#pragma omp parallel default(none), shared(localCinfo, localCupdate)
{
distUpdateLocalCinfo(localCinfo, localCupdate);
}
// if(me == 0) std::cout << "nv[" << nv << "]; Line["
// << __LINE__ << "]" << std::endl;
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
updateRemoteCommunities(dg, localCinfo, remoteCupdate, me, nprocs);
// if(me == 0) std::cout << "nv[" << nv << "]; Line["
// << __LINE__ << "]" << std::endl;
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Update remote communities communication time: " << (t1 - t0) << std::endl;
t0 = MPI_Wtime();
#endif
currMod = distComputeModularity(g, localCinfo, clusterWeight, constantForSecondTerm,
me, gpu_graph);
// if(me == 0) std::cout << "nv[" << nv << "]; Line["
// << __LINE__ << "]" << std::endl;
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Modularity computation + communication time: " << (t1 - t0) << std::endl;
#endif
if ((currMod - prevMod) < threshMod) {
#ifdef DEBUG_PRINTF
ofs << "Break here - no updates " << std::endl;
#endif
break;
}
prevMod = currMod;
if (prevMod < lower)
prevMod = lower;
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for default(none) \
shared(pastComm, currComm, targetComm) \
schedule(runtime)
#else
#pragma omp parallel for default(none) \
shared(pastComm, currComm, targetComm) \
schedule(static)
#endif
for (GraphElem i = 0; i < nv; i++) {
GraphElem tmp = pastComm[i];
pastComm[i] = currComm[i];
currComm[i] = targetComm[i];
targetComm[i] = tmp;
}
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Update local communities time: " << (t1 - t0) << std::endl;
ofs << "Total iteration time: " << (t1 - t2) << std::endl;
#endif
};
cvect = pastComm;
iters = numIters;
vDegree.clear();
pastComm.clear();
currComm.clear();
targetComm.clear();
clusterWeight.clear();
localCinfo.clear();
localCupdate.clear();
return prevMod;
} // distLouvainMethod plain
#endif
GraphWeight distLouvainMethodWithColoring(const int me, const int nprocs, const DistGraph &dg,
const long numColor, const ColorVector &vertexColor, size_t &ssz, size_t &rsz,
std::vector<GraphElem> &ssizes, std::vector<GraphElem> &rsizes,
std::vector<GraphElem> &svdata, std::vector<GraphElem> &rvdata,
CommunityVector &cvect, const GraphWeight lower, const GraphWeight thresh,
int& iters)
{
// if no colors, then fall back to original distLouvain
if (numColor == 1) {
ofs << "No color specified, executing non-color Louvain..." << std::endl;
return distLouvainMethod(me, nprocs, dg, ssz, rsz, ssizes,
rsizes, svdata, rvdata, cvect, lower, thresh, iters);
}
CommunityVector pastComm, currComm, targetComm;
GraphWeightVector vDegree;
GraphWeightVector clusterWeight;
CommVector localCinfo, localCupdate;
VertexCommMap remoteComm;
CommMap remoteCinfo, remoteCupdate;
const Graph &g = dg.getLocalGraph();
const GraphElem tnv = dg.getTotalNumVertices();
const GraphElem nv = g.getNumVertices();
const GraphElem ne = g.getNumEdges();
const GraphWeight threshMod = thresh;
GraphWeight constantForSecondTerm;
GraphWeight prevMod = lower;
GraphWeight currMod = -1.0;
int numIters = 0;
distInitLouvain(dg, pastComm, currComm, vDegree, clusterWeight, localCinfo,
localCupdate, constantForSecondTerm, me);
targetComm.resize(nv);
#ifdef DEBUG_PRINTF
ofs << "constantForSecondTerm: " << constantForSecondTerm << std::endl;
#endif
const GraphElem base = dg.getBase(me), bound = dg.getBound(me);
double t0, t1;
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
exchangeVertexReqs(dg, ssz, rsz, ssizes, rsizes,
svdata, rvdata, me, nprocs);
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Initial communication setup time: " << (t1 - t0) << std::endl;
#endif
/*** Create a CSR-like datastructure for vertex-colors ***/
std::vector<long> colorPtr(numColor+1,0);
std::vector<long> colorIndex(nv,0);
std::vector<long> colorAdded(numColor,0);
// Count the size of each color
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for firstprivate(numColor) schedule(runtime)
#else
#pragma omp parallel for firstprivate(numColor) schedule(static)
#endif
for(long i=0; i < nv; i++) {
const long start = (vertexColor[i] < 0)?(numColor-1):vertexColor[i];
__sync_fetch_and_add(&colorPtr[(long)start+1],1);
}
//Prefix sum:
for(long i=0; i<numColor; i++) {
colorPtr[i+1] += colorPtr[i];
}
//Group vertices with the same color in particular order
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for firstprivate(numColor) schedule(runtime)
#else
#pragma omp parallel for firstprivate(numColor) schedule(static)
#endif
for (long i=0; i<nv; i++) {
const long start = (vertexColor[i] < 0)?(numColor-1):vertexColor[i];
const long vindex = colorPtr[start] + __sync_fetch_and_add(&(colorAdded[start]), 1);
colorIndex[vindex] = i;
}
while(true) {
#ifdef DEBUG_PRINTF
const double t2 = MPI_Wtime();
ofs << "Starting iteration: " << numIters << std::endl;
#endif
numIters++;
#ifdef DEBUG_PRINTF
t0 = MPI_Wtime();
#endif
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for shared(clusterWeight) schedule(runtime)
#else
#pragma omp parallel for schedule(static) shared(clusterWeight)
#endif
for (GraphElem i = 0L; i < nv; i++)
clusterWeight[i] = 0;
// Color loop
for(long ci = 0; ci < numColor; ci++) {
fillRemoteCommunities(dg, me, nprocs, ssz, rsz, ssizes,
rsizes, svdata, rvdata, currComm, localCinfo,
remoteCinfo, remoteComm, remoteCupdate);
const long coloradj1 = colorPtr[ci];
const long coloradj2 = colorPtr[ci+1];
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for shared(clusterWeight, localCupdate, currComm, targetComm, \
vDegree, localCinfo, remoteCinfo, remoteComm, dg, remoteCupdate, pastComm), \
firstprivate(constantForSecondTerm) schedule(runtime)
#else
#pragma omp parallel for shared(clusterWeight, localCupdate, currComm, targetComm, \
vDegree, localCinfo, remoteCinfo, remoteComm, dg, remoteCupdate, pastComm), \
firstprivate(constantForSecondTerm) schedule(static)
#endif
for (long K = coloradj1; K < coloradj2; K++) {
distExecuteLouvainIteration(colorIndex[K], dg, currComm, targetComm,
vDegree, localCinfo, localCupdate, remoteComm, remoteCinfo,
remoteCupdate, constantForSecondTerm, clusterWeight, me);
}
// update local cinfo
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for default(none), shared(localCinfo, localCupdate) schedule(runtime)
#else
#pragma omp parallel for default(none), shared(localCinfo, localCupdate) schedule(static)
#endif
for (GraphElem i = 0; i < nv; i++) {
localCinfo[i].size += localCupdate[i].size;
localCinfo[i].degree += localCupdate[i].degree;
localCupdate[i].size = 0;
localCupdate[i].degree = 0;
}
updateRemoteCommunities(dg, localCinfo, remoteCupdate, me, nprocs);
} // end of Color loop
#ifdef DEBUG_PRINTF
t1 = MPI_Wtime();
ofs << "Color iteration computation time: " << (t1 - t0) << std::endl;
#endif
// global modularity
currMod = distComputeModularity(g, localCinfo, clusterWeight, constantForSecondTerm, me);
if ((currMod - prevMod) < threshMod) {
#ifdef DEBUG_PRINTF
ofs << "Break here - no updates " << std::endl;
#endif
break;
}
prevMod = currMod;
if (prevMod < lower)
prevMod = lower;
#ifdef OMP_SCHEDULE_RUNTIME
#pragma omp parallel for default(none), \
shared(pastComm, currComm, targetComm) \
schedule(runtime)
#else
#pragma omp parallel for default(none), \
shared(pastComm, currComm, targetComm) \
schedule(static)
#endif
for (GraphElem i = 0L; i < nv; i++) {
GraphElem tmp = pastComm[i];
pastComm[i] = currComm[i];
currComm[i] = targetComm[i];
targetComm[i] = tmp;
}
}; // end while loop
cvect = pastComm;
iters = numIters;
vDegree.clear();
pastComm.clear();
currComm.clear();
targetComm.clear();
clusterWeight.clear();
localCinfo.clear();
localCupdate.clear();
return prevMod;
} // distLouvainMethodWithColoring plain
GraphWeight distLouvainMethodWithColoring(const int me, const int nprocs, const DistGraph &dg,
const long numColor, const ColorVector &vertexColor, size_t &ssz, size_t &rsz,
std::vector<GraphElem> &ssizes, std::vector<GraphElem> &rsizes,
std::vector<GraphElem> &svdata, std::vector<GraphElem> &rvdata,
CommunityVector &cvect, const GraphWeight lower, const GraphWeight thresh,
int& iters, bool ETLocalOrRemote)
{
// if no colors, then fall back to original distLouvain
if (numColor == 1) {
ofs << "No color specified, executing non-color Louvain..." << std::endl;
return distLouvainMethod(me, nprocs, dg, ssz, rsz, ssizes,
rsizes, svdata, rvdata, cvect, lower, thresh, iters);
}
CommunityVector pastComm, currComm, targetComm;
GraphWeightVector vDegree;
GraphWeightVector clusterWeight, frozenClusterWeight;
CommVector localCinfo, localCupdate;
VertexCommMap remoteComm;
CommMap remoteCinfo, remoteCupdate;
const Graph &g = dg.getLocalGraph();
const GraphElem tnv = dg.getTotalNumVertices();
const GraphElem nv = g.getNumVertices();
const GraphElem ne = g.getNumEdges();
const GraphWeight threshMod = thresh;
GraphWeight constantForSecondTerm;
GraphWeight prevMod = lower;
GraphWeight currMod = -1.0;
int numIters = 0;
distInitLouvain(dg, pastComm, currComm, vDegree, clusterWeight, localCinfo,
localCupdate, constantForSecondTerm, me);
targetComm.resize(nv);
// for frozen vertices
frozenClusterWeight.resize(nv);
std::vector<bool> vActive;
vActive.resize(nv);
std::fill(vActive.begin(), vActive.end(), true);
#ifdef DEBUG_PRINTF
ofs << "constantForSecondTerm: " << constantForSecondTerm << std::endl;
#endif
const GraphElem base = dg.getBase(me), bound = dg.getBound(me);
double t0, t1;
#ifdef DEBUG_PRINTF