In this paper, we address the implementation of finite element codes on a parallel computer providing a shared virtual memory. We solve the Helmholtz equa tion at high-wave numbers by a method combining the least-squares formulation and finite-element dis cretization. Numerical experiments concerning the scattering of planar waves by nonconvex obstacles show the efficiency of the new algorithm. Parallelism relies heavily on shared variables and parallel loops; performances are enhanced by considering local ver sus global nodes and by renumbering the mesh. Ex periments are implemented on a KSR computer with up to 20 processors.
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