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parallel solver: slightly overallocate to reduce how often allocation is needed

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This commit is contained in:
Lunkhound
2018-03-13 04:19:02 -07:00
parent eec478709a
commit e526e48df8
2 changed files with 22 additions and 4 deletions
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6
src/BulletDynamics/ConstraintSolver/btBatchedConstraints.cpp
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@@ -892,6 +892,12 @@ static void setupSpatialGridBatchesMt(
memHelper.addChunk( (void**) &constraintBatchIds, sizeof( int ) * numConstraints ); memHelper.addChunk( (void**) &constraintBatchIds, sizeof( int ) * numConstraints );
memHelper.addChunk( (void**) &constraintRowBatchIds, sizeof( int ) * numConstraintRows ); memHelper.addChunk( (void**) &constraintRowBatchIds, sizeof( int ) * numConstraintRows );
size_t scratchSize = memHelper.getSizeToAllocate(); size_t scratchSize = memHelper.getSizeToAllocate();
// if we need to reallocate
if (scratchMemory->capacity() < scratchSize)
{
// allocate 6.25% extra to avoid repeated reallocs
scratchMemory->reserve( scratchSize + scratchSize/16 );
}
scratchMemory->resizeNoInitialize( scratchSize ); scratchMemory->resizeNoInitialize( scratchSize );
char* memPtr = &scratchMemory->at(0); char* memPtr = &scratchMemory->at(0);
memHelper.setChunkPointers( memPtr ); memHelper.setChunkPointers( memPtr );

20
src/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolverMt.cpp
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@@ -568,10 +568,22 @@ void btSequentialImpulseConstraintSolverMt::allocAllContactConstraints(btPersist
} }
} }
} }
m_tmpSolverContactConstraintPool.resizeNoInitialize(numContacts); {
m_rollingFrictionIndexTable.resizeNoInitialize(numContacts); BT_PROFILE( "allocPools" );
m_tmpSolverContactFrictionConstraintPool.resizeNoInitialize(numContacts*m_numFrictionDirections); if ( m_tmpSolverContactConstraintPool.capacity() < numContacts )
m_tmpSolverContactRollingFrictionConstraintPool.resizeNoInitialize(numRollingFrictionConstraints); {
// if we need to reallocate, reserve some extra so we don't have to reallocate again next frame
int extraReserve = numContacts / 16;
m_tmpSolverContactConstraintPool.reserve( numContacts + extraReserve );
m_rollingFrictionIndexTable.reserve( numContacts + extraReserve );
m_tmpSolverContactFrictionConstraintPool.reserve( ( numContacts + extraReserve )*m_numFrictionDirections );
m_tmpSolverContactRollingFrictionConstraintPool.reserve( numRollingFrictionConstraints + extraReserve );
}
m_tmpSolverContactConstraintPool.resizeNoInitialize( numContacts );
m_rollingFrictionIndexTable.resizeNoInitialize( numContacts );
m_tmpSolverContactFrictionConstraintPool.resizeNoInitialize( numContacts*m_numFrictionDirections );
m_tmpSolverContactRollingFrictionConstraintPool.resizeNoInitialize( numRollingFrictionConstraints );
}
} }
{ {
AllocContactConstraintsLoop loop(this, &cachedInfoArray[0]); AllocContactConstraintsLoop loop(this, &cachedInfoArray[0]);