Talk detail

Participant	Neilsen, David
Institution	Brigham Young University - N147 ESC - Provo - Utah - USA

Session	AN5	Accepted	Yes	Order	5	Time	14' + 3'
Talk	Oral abstract	Title	Neutron star evolutions with nuclear equations of state with a new execution model
Co-authors	Matthew Anderson, Hartmut Kaiser, Thomas Sterling
Abstract	The addition of nuclear and neutrino physics to general relativistic fluid codes gives a more realistic description of hot nuclear matter in neutron star and black hole systems. This additional microphysics requires that each processor have access to large tables of data, such as equations of state (EOS), and in large simulations the memory required to store these tables locally can become excessive. In this talk we present neutron star evolution results obtained using a message driven multi-threaded execution model known as ParalleX, an alternative to using a hybrid MPI-OpenMP approach. ParalleX provides the user a new way of computation based on message-driven flow control coordinated by lightweight synchronization elements, which improves scalability and simplifies code development. We present performance results for an open source, distributed ParalleX-based tabulated EOS component capable of handling tables so large that they can not be read into the memory of a single node, and results from neutron star evolutions using the Shen EOS.