Deactivating parallelism for 2D/1D + corrections for non parallel run + adding ParallelCompute function in Python

src/SMESH/SMESH_Gen.cxx

@@ -48,6 +48,7 @@
 #include <TopoDS_Iterator.hxx>
 
 #include "memoire.h"
+#include <chrono>
 
 #ifdef WIN32
   #include <windows.h>
@@ -247,6 +248,9 @@ bool SMESH_Gen::Compute(SMESH_Mesh &                aMesh,
 
     TopAbs_ShapeEnum previousShapeType = TopAbs_VERTEX;
     std::vector<std::future<void>> pending;
+    int nbThreads = aMesh.GetNbThreads();
+    auto begin = std::chrono::high_resolution_clock::now();
+
 
     smIt = shapeSM->getDependsOnIterator(includeSelf, !complexShapeFirst);
     while ( smIt->more() )
@@ -258,13 +262,17 @@ bool SMESH_Gen::Compute(SMESH_Mesh &                aMesh,
       const TopAbs_ShapeEnum shapeType = shape.ShapeType();
       if ( !aMesh.HasShapeToMesh() && shapeType == TopAbs_VERTEX )
         continue;
-
+      if(shapeType==TopAbs_FACE||shapeType==TopAbs_EDGE)
+        aMesh.SetNbThreads(0);
+      else
+        aMesh.SetNbThreads(nbThreads);
       //DEBUG std::cout << "Shape Type" << shapeType << " previous" << previousShapeType << std::endl;
-      if (aMesh.IsParallel() && shapeType != previousShapeType) {
+      if ((aMesh.IsParallel()||nbThreads!=0) && shapeType != previousShapeType) {
         // Waiting for all threads for the previous type to end
         for(auto &it: pending){
           it.wait();
         }
+
         std::string file_name;
         switch(previousShapeType){
           case TopAbs_FACE:
@@ -276,6 +284,7 @@ bool SMESH_Gen::Compute(SMESH_Mesh &                aMesh,
           case TopAbs_VERTEX:
             file_name = "Mesh0D.med";
             break;
+          case TopAbs_SOLID:
           default:
             file_name = "";
             break;
@@ -306,10 +315,14 @@ bool SMESH_Gen::Compute(SMESH_Mesh &                aMesh,
                              shapeSM, aShapeOnly, allowedSubShapes,
                              aShapesId));
       } else {
+        auto begin2 = std::chrono::high_resolution_clock::now();
+
         compute_function(1 ,smToCompute, computeEvent,
                          shapeSM, aShapeOnly, allowedSubShapes,
                          aShapesId);
 
+
+
         if (smToCompute->GetComputeState() == SMESH_subMesh::FAILED_TO_COMPUTE &&
            ( shapeType != TopAbs_EDGE || !SMESH_Algo::isDegenerated( TopoDS::Edge( shape ))))
           ret = false;
@@ -328,6 +341,14 @@ bool SMESH_Gen::Compute(SMESH_Mesh &                aMesh,
     }
 
     aMesh.GetMeshDS()->Modified();
+    auto end = std::chrono::high_resolution_clock::now();
+    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
+    std::cout << "Time for All: " << elapsed.count()*1e-9 << std::endl;
+
+    // Pool of thread for computation
+    if(aMesh.IsParallel())
+      aMesh.DeletePoolThreads();
+
     return ret;
   }
   else
@@ -338,7 +359,7 @@ bool SMESH_Gen::Compute(SMESH_Mesh &                aMesh,
     // the most complex shapes and collect sub-meshes with algos that
     // DO support sub-meshes
     // ================================================================
-
+    auto begin = std::chrono::high_resolution_clock::now();
     list< SMESH_subMesh* > smWithAlgoSupportingSubmeshes[4]; // for each dim
 
     // map to sort sm with same dim algos according to dim of
@@ -534,7 +555,12 @@ bool SMESH_Gen::Compute(SMESH_Mesh &                aMesh,
             continue;
           sm->SetAllowedSubShapes( fillAllowed( shapeSM, aShapeOnly, allowedSubShapes ));
           setCurrentSubMesh( sm );
+          auto begin = std::chrono::high_resolution_clock::now();
           sm->ComputeStateEngine( computeEvent );
+          auto end = std::chrono::high_resolution_clock::now();
+          auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
+          std::cout << "Time for seq:alldim:compute: " << elapsed.count()*1e-9 << std::endl;
+
           setCurrentSubMesh( NULL );
           sm->SetAllowedSubShapes( nullptr );
           if ( aShapesId )
@@ -547,6 +573,10 @@ bool SMESH_Gen::Compute(SMESH_Mesh &                aMesh,
     // mesh the rest sub-shapes starting from vertices
     // -----------------------------------------------
     ret = Compute( aMesh, aShape, aFlags | UPWARD, aDim, aShapesId, allowedSubShapes );
+    auto end = std::chrono::high_resolution_clock::now();
+    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
+    std::cout << "Time for All: " << elapsed.count()*1e-9 << std::endl;
+
   }
 
   MEMOSTAT;

src/SMESH/SMESH_Mesh.hxx

@@ -394,6 +394,7 @@ class SMESH_EXPORT SMESH_Mesh
   void SetNbThreads(int nbThreads){_NbThreads=nbThreads;};
 
   void InitPoolThreads(){_pool = new ctpl::thread_pool(_NbThreads);};
+  void DeletePoolThreads(){delete _pool;};
 
   bool IsParallel(){return _NbThreads > 0;}
 

src/SMESH/SMESH_subMesh.cxx

@@ -65,7 +65,7 @@ using namespace std;
 //#define PRINT_WHO_COMPUTE_WHAT
 #endif
 
-#define PRINT_WHO_COMPUTE_WHAT
+//#define PRINT_WHO_COMPUTE_WHAT
 //=============================================================================
 /*!
  * \brief Allocate some memory at construction and release it at destruction.
@@ -1519,7 +1519,8 @@ bool SMESH_subMesh::ComputeStateEngine(compute_event event)
           break;
         }
         TopoDS_Shape shape = _subShape;
-        algo->SubMeshesToCompute().assign( 1, this );
+        if(!_father->IsParallel())
+          algo->SubMeshesToCompute().assign( 1, this );
         // check submeshes needed
         // In parallel there would be no submesh to check
         if (_father->HasShapeToMesh() && !_father->IsParallel()) {

src/SMESH_SWIG/smeshBuilder.py

@@ -1842,8 +1842,28 @@ class Mesh(metaclass = MeshMeta):
                 geom = self.geom
         return self.smeshpyD.Evaluate(self.mesh, geom)
 
+    def ParallelCompute(self, nbThreads, geom=0, discardModifs=False, refresh=False):
+        """
+        Parallel computation of the mesh and return the status of the computation
+        The mesh must contains have be constructed using create_parallel_mesh
 
-    def Compute(self, geom=0, discardModifs=False, refresh=False, nbThreads=0):
+        Parameters:
+                nbThreads: Number of threads to use for a parallel computation
+                geom: geomtrical shape on which mesh data should be computed
+                discardModifs: if True and the mesh has been edited since
+                        a last total re-compute and that may prevent successful partial re-compute,
+                        then the mesh is cleaned before Compute()
+                refresh: if *True*, Object Browser is automatically updated (when running in GUI)
+
+        Returns:
+                True or False
+        """
+        if (nbThreads <= 1):
+            raise ValueError("nbThreads must be greater than 1")
+        self.mesh.SetNbThreads(nbThreads)
+        return self.Compute(geom=geom, discardModifs=discardModifs, refresh=refresh)
+
+    def Compute(self, geom=0, discardModifs=False, refresh=False):
         """
         Compute the mesh and return the status of the computation
 
@@ -1865,8 +1885,6 @@ class Mesh(metaclass = MeshMeta):
         try:
             if discardModifs and self.mesh.HasModificationsToDiscard(): # issue 0020693
                 self.mesh.Clear()
-            # Setting parallel parameters
-            self.mesh.SetNbThreads(nbThreads)
             ok = self.smeshpyD.Compute(self.mesh, geom)
         except SALOME.SALOME_Exception as ex:
             print("Mesh computation failed, exception caught:")

src/StdMeshers/StdMeshers_Regular_1D.cxx

@@ -133,15 +133,15 @@ bool StdMeshers_Regular_1D::CheckHypothesis( SMESH_Mesh&         aMesh,
   // find non-auxiliary hypothesis
   const SMESHDS_Hypothesis *theHyp = 0;
   set< string > propagTypes;
-  std::cout << "For shape " << aShape.HashCode(1) << " of type "<< aShape.ShapeType() <<
+  //std::cout << "For shape " << aShape.HashCode(1) << " of type "<< aShape.ShapeType() <<
-               "CheckHypothesis" << std::endl;
+  //             "CheckHypothesis" << std::endl;
-  for(auto hyp:hyps){
+  // for(auto hyp:hyps){
-    SMESH_Comment hypStr;
+  //   SMESH_Comment hypStr;
-    hypStr << hyp << " " << hyp->GetName() << " ";
+  //   hypStr << hyp << " " << hyp->GetName() << " ";
-    ((SMESHDS_Hypothesis*)hyp)->SaveTo( hypStr.Stream() );
+  //   ((SMESHDS_Hypothesis*)hyp)->SaveTo( hypStr.Stream() );
-    hypStr << " ";
+  //   hypStr << " ";
-    std::cout << hypStr << std::endl;
+  //   std::cout << hypStr << std::endl;
-  }
+  // }
   list <const SMESHDS_Hypothesis * >::const_iterator h = hyps.begin();
   for ( ; h != hyps.end(); ++h ) {
     if ( static_cast<const SMESH_Hypothesis*>(*h)->IsAuxiliary() ) {
@@ -1218,7 +1218,7 @@ bool StdMeshers_Regular_1D::Compute(SMESH_Mesh & theMesh, const TopoDS_Shape & t
   const SMDS_MeshNode *  nLast = SMESH_Algo::VertexNode( VLast,  meshDS );
   if ( !nFirst || !nLast ){
     theMesh.Unlock();
-    std::cout << "exit no node" << std::endl;
+    //std::cout << "exit no node" << std::endl;
     return error( COMPERR_BAD_INPUT_MESH, "No node on vertex");
   }
   // remove elements created by e.g. pattern mapping (PAL21999)
@@ -1265,7 +1265,7 @@ bool StdMeshers_Regular_1D::Compute(SMESH_Mesh & theMesh, const TopoDS_Shape & t
     BRepAdaptor_Curve C3d( E );
     if ( ! computeInternalParameters( theMesh, C3d, length, f, l, params, reversed, true )) {
       theMesh.Unlock();
-    std::cout << "exit Compute internal failed" << std::endl;
+    //std::cout << "exit Compute internal failed" << std::endl;
 
       return false;
     }
@@ -1358,7 +1358,7 @@ bool StdMeshers_Regular_1D::Compute(SMESH_Mesh & theMesh, const TopoDS_Shape & t
     }
   }
   theMesh.Unlock();
-  std::cout << "exit normal" << std::endl;
+  //std::cout << "exit normal" << std::endl;
 
   return true;
 }