Merge branch 'mem.AthAllocators-20211021' into 'master'

AthAllocators, etc: Reduce memory requirements.

See merge request !47458

Control/AthAllocators/AthAllocators/DataPool.h

 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef ATHALLOCATORS_DATAPOOL_H
@@ -159,7 +159,7 @@ public:
    const static typename alloc_t::Params s_params;
 
   /// minimum number of elements in pool
-  static const unsigned int s_minRefCount = 1024;
+  static constexpr size_t s_minRefCount = 1024;
 };
 
 

Control/AthAllocators/AthAllocators/DataPool.icc

 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
 */
 
 //-----------------------------------------------------------
@@ -22,7 +22,7 @@ DataPool<VALUE>::DataPool(size_type n /*= 0*/)
   : m_handle (&s_params)
 {
   if (n > 0)
-    m_handle.reserve (n);
+    m_handle.reserve (std::max (n, s_minRefCount));
 }
 
 template <typename VALUE>
@@ -31,7 +31,7 @@ DataPool<VALUE>::DataPool(const EventContext& ctx,
   : m_handle (static_cast<SG::ArenaHeader*>(nullptr), ctx, &s_params)
 {
   if (n > 0)
-    m_handle.reserve (n);
+    m_handle.reserve (std::max (n, s_minRefCount));
 }
 
 template <typename VALUE>
@@ -40,7 +40,7 @@ DataPool<VALUE>::DataPool(SG::Arena* arena,
   : m_handle (arena, nullptr, &s_params)
 {
   if (n > 0)
-    m_handle.reserve (n);
+    m_handle.reserve (std::max (n, s_minRefCount));
 }
 
 //-----------------------------------------------------------

Control/AthAllocators/src/ArenaBlock.cxx

@@ -172,7 +172,7 @@ void ArenaBlock::protect()
   int stat = mprotect (this, m_size*m_elt_size+ArenaBlockBodyOffset,
                        PROT_READ);
   if (stat) {
-    throw SG::ExcProtection (stat);
+    throw SG::ExcProtection (errno);
   }
 }
 
@@ -188,7 +188,7 @@ void ArenaBlock::unprotect()
   int stat = mprotect (this, m_size*m_elt_size+ArenaBlockBodyOffset,
                        PROT_READ + PROT_WRITE);
   if (stat) {
-    throw SG::ExcProtection (stat);
+    throw SG::ExcProtection (errno);
   }
 }
 

Control/AthAllocators/src/ArenaBlockAllocatorBase.cxx

@@ -124,11 +124,8 @@ void ArenaBlockAllocatorBase::reserve (size_t size)
   }
   if (size > m_stats.elts.total) {
     // Growing the pool.
-    // Make a new block of the required size (but not less than nblock).
+    // Make a new block of the required size.
     size_t sz = size - m_stats.elts.total;
-    if (sz < m_params.nblock) {
-      sz = m_params.nblock;
-    }
     ArenaBlock* newblock = ArenaBlock::newBlock (sz, m_params.eltSize,
                                                  m_params.constructor);
 

InnerDetector/InDetRecEvent/SiSPSeededTrackFinderData/src/SiTrajectory_xk.cxx

@@ -57,6 +57,7 @@ InDet::SiTrajectory_xk::convertToTrackStateOnSurface()
 {
 
   auto dtsos = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+  dtsos->reserve (1 + m_lastElement - m_firstElement);
 
   bool multi = m_tools->multiTrack(); if (m_nclusters <= m_tools->clustersmin() || pTfirst() < m_tools->pTmin()) multi = false;
  
@@ -105,6 +106,7 @@ InDet::SiTrajectory_xk::convertToTrackStateOnSurfaceWithNewDirection()
 {
 
   auto dtsos = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+  dtsos->reserve (1 + m_lastElement - m_firstElement);
 
   bool multi = m_tools->multiTrack(); if (pTfirst() < m_tools->pTmin()) multi = false;
 
@@ -157,6 +159,7 @@ Trk::TrackStateOnSurfaceProtContainer::ContainerUniquePtr
 InDet::SiTrajectory_xk::convertToSimpleTrackStateOnSurface()
 {
   auto dtsos = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+  dtsos->reserve (2 + m_lastElement - m_firstElement);
 
   int i = m_firstElement;
 
@@ -210,6 +213,7 @@ Trk::TrackStateOnSurfaceProtContainer::ContainerUniquePtr
 InDet::SiTrajectory_xk::convertToSimpleTrackStateOnSurfaceWithNewDirection()
 {
   auto dtsos = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+  dtsos->reserve (1 + m_lastElement - m_firstElement);
 
   int i = m_lastElement;
 
@@ -260,6 +264,7 @@ Trk::TrackStateOnSurfaceProtContainer::ContainerUniquePtr
 InDet::SiTrajectory_xk::convertToSimpleTrackStateOnSurfaceForDisTrackTrigger()
 {
   auto dtsos = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+  dtsos->reserve (1 + m_lastElement - m_firstElement);
 
   int i = m_firstElement;
 
@@ -2173,12 +2178,14 @@ InDet::SiTrajectory_xk::convertToNextTrackStateOnSurface()
   }
 
   auto dtsos = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+  dtsos->reserve (m_ntos);
 
   if (i==m_ntos) {
     dtsos->elt_allocator().protect();
     return dtsos;
   }
 
+  dtsos->reserve (m_ntos);
   for (i=0; i!=m_ntos; ++i) {
 
     auto tsos = m_elements[m_atos[i]].tsos(*dtsos, m_itos[i]);

InnerDetector/InDetRecTools/InDetAmbiTrackSelectionTool/src/InDetAmbiTrackSelectionTool.cxx

@@ -556,6 +556,7 @@ Trk::Track* InDet::InDetAmbiTrackSelectionTool::createSubTrack( const std::vecto
   }
 
   auto vecTsos = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+  vecTsos->reserve (tsos.size());
 
   // loop over TSOS, copy TSOS and push into vector
   for (const Trk::TrackStateOnSurface* tsosIt : tsos) {

InnerDetector/InDetRecTools/InDetAmbiTrackSelectionTool/src/InDetDenseEnvAmbiTrackSelectionTool.cxx

@@ -1488,6 +1488,7 @@ Trk::Track* InDet::InDetDenseEnvAmbiTrackSelectionTool::createSubTrack( const st
   }
 
   auto vecTsos = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+  vecTsos->reserve (tsos.size());
 
   // loop over TSOS, copy TSOS and push into vector
   for (const Trk::TrackStateOnSurface* iTsos : tsos) {

Tracking/TrkFitter/TrkGaussianSumFilter/src/GaussianSumFitter.cxx

@@ -356,6 +356,7 @@ Trk::GaussianSumFitter::fit(
   // Store only TSOS in tracks instead of MCSOS
   if (!m_StoreMCSOS) {
     auto slimmedSmoothedTrajectory = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+    slimmedSmoothedTrajectory->reserve (smoothedTrajectory->size());
     for (const Trk::TrackStateOnSurface* tsos : *smoothedTrajectory) {
       slimmedSmoothedTrajectory->push_back(slimmedSmoothedTrajectory->allocate(*tsos));
     }
@@ -494,6 +495,7 @@ Trk::GaussianSumFitter::fit(
   // Store only TSOS in tracks instead of MCSOS
   if (!m_StoreMCSOS) {
     auto slimmedSmoothedTrajectory = Trk::TrackStateOnSurfaceProtContainer::make_unique();
+    slimmedSmoothedTrajectory->reserve (smoothedTrajectory->size());
     for (const Trk::TrackStateOnSurface* tsos : *smoothedTrajectory) {
       slimmedSmoothedTrajectory->push_back(slimmedSmoothedTrajectory->allocate(*tsos));
     }
@@ -1034,6 +1036,7 @@ Trk::GaussianSumFitter::fit(
    * we opt for const ptr*
    */
   auto smoothedTrajectory = SmoothedTrajectoryProt::make_unique();
+  smoothedTrajectory->reserve (5 + forwardTrajectory.size());
   auto smootherPredictionMultiState =
     std::make_unique<Trk::MultiComponentState>();