Effiency Issues of a Parallel FE Implementation on Shared Memory

called substructures or superelements, such that in the field of parallel FEM methods a number of highly eficient solutions for distributed memory systems are existing, but the passage to adaptive parallel FEM simulations leads, in all probability, to a more dynamic behaviour with respect to data placement and load balancing. Therefore shared-memory architecture seems to be a more appropriate solution for getting ejficient implementations. This work presents a parallelized CG-method for shared memory systems which was implemented on a 4-processor SMP system and makes explicit use of shared memory to enhance the communication between different domains. it is based on an idea for implementing parallization on distributed memory systems and represents an appropiate modijcation of this method. The results show that an increased synchronization expense can partially compensate the advantages of shared memory communication depending on the levels of refinement and the processor number