https://github.com/N-BodyShop/changa
Tip revision: 852b3842fdc4dd982a2c51d502ff552bb5ab5247 authored by Tim Haines on 23 October 2018, 23:21:25 UTC
Complete overhaul of build system
Complete overhaul of build system
Tip revision: 852b384
MultistepLB_notopo.cpp
#include <charm++.h>
#include "cklists.h"
#include "MultistepLB_notopo.h"
#include "TopoManager.h"
#include "ParallelGravity.h"
#include "Vector3D.h"
#include <queue>
#include "formatted_string.h"
extern CProxy_TreePiece treeProxy;
CkpvExtern(int, _lb_obj_index);
using namespace std;
//#define ORB3DLB_NOTOPO_DEBUG CkPrintf
CreateLBFunc_Def(MultistepLB_notopo, "Works best with multistepped runs; uses Orb3D_notopo");
void MultistepLB_notopo::init() {
lbname = "MultistepLB_notopo";
if (CkpvAccess(_lb_obj_index) == -1)
CkpvAccess(_lb_obj_index) = LBRegisterObjUserData(sizeof(TaggedVector3D));
}
MultistepLB_notopo::MultistepLB_notopo(const CkLBOptions &opt): CBase_MultistepLB_notopo(opt)
{
init();
if (CkMyPe() == 0){
CkPrintf("[%d] MultistepLB_notopo created\n",CkMyPe());
}
}
bool MultistepLB_notopo::QueryBalanceNow(int step){
if(CkMyPe() == 0) CkPrintf("Orb3dLB_notopo: Step %d\n", step);
// if(step == 0) return false;
return true;
}
// helper functions for multistepping
#ifdef MCLBMS
void MultistepLB_notopo::makeActiveProcessorList(BaseLB::LDStats *stats, int numActiveObjs){
int objsPerProc = 8;
int expandFactor = 4;
int procsNeeded;
procsNeeded = expandFactor*numActiveObjs/objsPerProc > stats->count ? stats->count : expandFactor*numActiveObjs/objsPerProc;
/* currently, only the first procsNeeded procs are used - could do something more sophisticated here in the future - FIXME */
#ifdef MCLBMSV
CkPrintf("Processors 0 to %d active\n", procsNeeded-1);
#endif
}
#endif
/// @brief Implement load balancing: store loads and determine active
/// processors and objects, then call ORB3D.
void MultistepLB_notopo::work(BaseLB::LDStats* stats)
{
#if CMK_LBDB_ON
// find active objects - mark the inactive ones as non-migratable
int count;
if(_lb_args.debug() >= 2 && step() > 0) {
// Write out "particle file" of measured load balance information
auto achFileName = make_formatted_string("lb_a.%d.sim", step()-1);
FILE *fp = fopen(achFileName.c_str(), "w");
CkAssert(fp != NULL);
int num_migratables = stats->n_objs;
for(int i = 0; i < stats->n_objs; i++) {
if (!stats->objData[i].migratable) {
num_migratables--;
}
}
fprintf(fp, "%d %d 0\n", num_migratables, num_migratables);
for(int i = 0; i < stats->n_objs; i++) {
if (!stats->objData[i].migratable) continue;
LDObjData &odata = stats->objData[i];
TaggedVector3D* udata = (TaggedVector3D *)odata.getUserData(CkpvAccess(_lb_obj_index));
fprintf(fp, "%g %g %g %g 0.0 0.0 0.0 %d %d\n",
stats->objData[i].wallTime,
udata->vec.x,
udata->vec.y,
udata->vec.z,
stats->from_proc[i],
udata->tp);
}
fclose(fp);
}
int numActiveObjects = 0;
int numInactiveObjects = 0;
int minActiveProc = INT_MAX;
int maxActiveProc = 0;
for(int i = 0; i < stats->n_objs; i++){
stats->to_proc[i] = stats->from_proc[i];
}
for(int i = 0; i < stats->n_objs; i++){
if (!stats->objData[i].migratable) continue;
LDObjData &odata = stats->objData[i];
TaggedVector3D* udata = (TaggedVector3D *)odata.getUserData(CkpvAccess(_lb_obj_index));
if(udata->numActiveParticles == 0){
numInactiveObjects++;
}
else{
numActiveObjects++;
if(minActiveProc > stats->from_proc[i])
minActiveProc = stats->from_proc[i];
if(maxActiveProc < stats->from_proc[i])
maxActiveProc = stats->from_proc[i];
}
}
CkPrintf("numActiveObjects: %d, numInactiveObjects: %d\n", numActiveObjects,
numInactiveObjects);
CkPrintf("active PROC range: %d to %d\n", minActiveProc, maxActiveProc);
if(numActiveObjects < 0.1*numInactiveObjects) {
// only a small number of active objects, only migrate them
for(int i = 0; i < stats->n_objs; i++){
if (!stats->objData[i].migratable) continue;
LDObjData &odata = stats->objData[i];
TaggedVector3D* udata =
(TaggedVector3D *)odata.getUserData(CkpvAccess(_lb_obj_index));
if(udata->numActiveParticles == 0) {
stats->objData[i].migratable = 0;
stats->n_migrateobjs--;
}
}
}
else {
CkPrintf("Migrating all: numActiveObjects: %d, numInactiveObjects: %d\n", numActiveObjects, numInactiveObjects);
}
// select processors
#ifdef MCLBMSV
//printData(*stats, phase, NULL);
CkPrintf("making active processor list\n");
#endif
makeActiveProcessorList(stats, numActiveObjects);
count = stats->count;
// let the strategy take over on this modified instrumented data and processor information
work2(stats,count);
#endif //CMK_LDB_ON
}
//**************************************
// ORB3DLB functions
//**************************************
//
/// @brief ORB3D load balance.
void MultistepLB_notopo::work2(BaseLB::LDStats *stats, int count){
int numobjs = stats->n_objs;
int nmig = stats->n_migrateobjs;
// this data structure is used by the orb3d strategy
// to balance objects. it is NOT indexed by tree piece index
// there are as many entries in it as there are
// migratable (active) tree pieces
vector<OrbObject> tp_array;
tp_array.resize(nmig);
if (_lb_args.debug()>=2) {
CkPrintf("[work2] ready tp_array data structure\n");
}
vector<Event> tpEvents[NDIMS];
for(int i = 0; i < NDIMS; i++){
tpEvents[i].reserve(nmig);
}
OrientedBox<float> box;
int numProcessed = 0;
for(int i = 0; i < numobjs; i++){
if(!stats->objData[i].migratable) continue;
float load;
LDObjData &odata = stats->objData[i];
TaggedVector3D* udata = (TaggedVector3D *)odata.getUserData(CkpvAccess(_lb_obj_index));
if(step() == 0){
load = udata->myNumParticles;
}
else{
load = stats->objData[i].wallTime;
}
tpEvents[XDIM].push_back(Event(udata->vec.x,load,numProcessed));
tpEvents[YDIM].push_back(Event(udata->vec.y,load,numProcessed));
tpEvents[ZDIM].push_back(Event(udata->vec.z,load,numProcessed));
tp_array[numProcessed]= OrbObject(i, udata->myNumParticles);
tp_array[numProcessed].centroid = udata->vec;
numProcessed++;
}
CkAssert(numProcessed==nmig);
orbPrepare(tpEvents, box, nmig, stats);
orbPartition(tpEvents,box,stats->count,tp_array, stats);
refine(stats, numobjs);
if(_lb_args.debug() >= 2) {
// Write out "particle file" of load balance information
auto achFileName = make_formatted_string("lb.%d.sim", step());
FILE *fp = fopen(achFileName.c_str(), "w");
CkAssert(fp != NULL);
int num_migratables = numobjs;
for(int i = 0; i < numobjs; i++) {
if (!stats->objData[i].migratable) {
num_migratables--;
}
}
fprintf(fp, "%d %d 0\n", num_migratables, num_migratables);
for(int i = 0; i < numobjs; i++) {
if(!stats->objData[i].migratable) continue;
LDObjData &odata = stats->objData[i];
TaggedVector3D* udata =
(TaggedVector3D *)odata.getUserData(CkpvAccess(_lb_obj_index));
fprintf(fp, "%g %g %g %g 0.0 0.0 0.0 %d %d\n",
stats->objData[i].wallTime,
udata->vec.x,
udata->vec.y,
udata->vec.z,
stats->to_proc[i],
udata->tp);
}
fclose(fp);
}
}
void MultistepLB_notopo::pup(PUP::er &p){
CBase_MultistepLB_notopo::pup(p);
}
#include "MultistepLB_notopo.def.h"