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BulletMultiThreeded SpuGatheringCollisionDispatcher: minor change in batch size of scheduled pairs: use 128 by default, unless the number of pairs is less then (total amount of tasks * batch size)

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erwin.coumans
2010-02-12 23:14:16 +00:00
parent e68a13f185
commit e71051e931
2 changed files with 10 additions and 3 deletions
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9
src/BulletMultiThreaded/SpuGatheringCollisionDispatcher.cpp
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@@ -178,14 +178,21 @@ void SpuGatheringCollisionDispatcher::dispatchAllCollisionPairs(btOverlappingPai
//send one big batch //send one big batch
int numTotalPairs = pairCache->getNumOverlappingPairs(); int numTotalPairs = pairCache->getNumOverlappingPairs();
btBroadphasePair* pairPtr = pairCache->getOverlappingPairArrayPtr(); btBroadphasePair* pairPtr = pairCache->getOverlappingPairArrayPtr();
int i; int i;
{ {
int pairRange = SPU_BATCHSIZE_BROADPHASE_PAIRS;
if (numTotalPairs < (m_spuCollisionTaskProcess->getNumTasks()*SPU_BATCHSIZE_BROADPHASE_PAIRS))
{
pairRange = (numTotalPairs/m_spuCollisionTaskProcess->getNumTasks())+1;
}
BT_PROFILE("addWorkToTask"); BT_PROFILE("addWorkToTask");
for (i=0;i<numTotalPairs;) for (i=0;i<numTotalPairs;)
{ {
//Performance Hint: tweak this number during benchmarking //Performance Hint: tweak this number during benchmarking
static const int pairRange = SPU_BATCHSIZE_BROADPHASE_PAIRS;
int endIndex = (i+pairRange) < numTotalPairs ? i+pairRange : numTotalPairs; int endIndex = (i+pairRange) < numTotalPairs ? i+pairRange : numTotalPairs;
m_spuCollisionTaskProcess->addWorkToTask(pairPtr,i,endIndex); m_spuCollisionTaskProcess->addWorkToTask(pairPtr,i,endIndex);
i = endIndex; i = endIndex;

4
src/BulletMultiThreaded/SpuGatheringCollisionDispatcher.h
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@@ -23,8 +23,8 @@ subject to the following restrictions:
///Too big value might render some SPUs are idle, while a few other SPUs are doing all work. ///Too big value might render some SPUs are idle, while a few other SPUs are doing all work.
//#define SPU_BATCHSIZE_BROADPHASE_PAIRS 8 //#define SPU_BATCHSIZE_BROADPHASE_PAIRS 8
//#define SPU_BATCHSIZE_BROADPHASE_PAIRS 16 //#define SPU_BATCHSIZE_BROADPHASE_PAIRS 16
#define SPU_BATCHSIZE_BROADPHASE_PAIRS 64 //#define SPU_BATCHSIZE_BROADPHASE_PAIRS 64
//#define SPU_BATCHSIZE_BROADPHASE_PAIRS 128 #define SPU_BATCHSIZE_BROADPHASE_PAIRS 128
//#define SPU_BATCHSIZE_BROADPHASE_PAIRS 256 //#define SPU_BATCHSIZE_BROADPHASE_PAIRS 256
//#define SPU_BATCHSIZE_BROADPHASE_PAIRS 512 //#define SPU_BATCHSIZE_BROADPHASE_PAIRS 512
//#define SPU_BATCHSIZE_BROADPHASE_PAIRS 1024 //#define SPU_BATCHSIZE_BROADPHASE_PAIRS 1024