The creation of ever more realistic images is central to many elds ranging from the animation industry to education, and ray tracing is one of the most popular and powerful means by which photo-realistic images can be created. In this paper, we report on porting, measuring and optimizing a ray tracer on cluster computers. We investigate (A) the impact of different hardware decisions (interconne...

Electronic structure methods typically benefit from symmetry breaking and restoration, specially in the strong correlation regime. The same goes for Ans\"atze on a quantum computer. We develop unitary coupled cluster method antisymmetrized geminal power (AGP) -- state formally equivalent to number-projected Bardeen--Cooper--Schrieffer wavefunction. demonstrate our single-band Fermi--Hubbard Ham...

he computing trend is moving from clustering highend mainframes to clustering desktop computers. This trend is triggered by the widespread use of PCs, workstations, Gigabit networks, and middleware support for clustering. This paper presents new approaches to achieving fault tolerance and single system image (SSI) in a workstation cluster. A multicomputer cluster is a collection of node compute...

A parallel programming system, called MPC++, provides parallel primitives such as a remote function invocation, a global pointer, and a synchronization structure using the C++ template feature. The system has run on a cluster of homogeneous computers. In this paper, the runtime system is extended to run on a cluster made up of heterogeneous computers environment. Unlike other distributed or par...

Clusters of commodity machines have become a popular way of building cheap high performance parallel computers. Many of these designs rely on standard Ethernet networks as a system interconnect. We have profiled the performance of some standard message passing communication on commodity clusters using MPIBench, a tool for benchmarking the performance of MPI routines that uses a highly accurate,...