Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Boyana Norris Project Name: pflotran Division: MCS Project title: PFLOTRAN Performance Analysis and Tuning Associated funding: Performance Engineering Research Institute (PERI) SciDAC2 Project Other Systems: Jazz, Surveyor, Intrepid Science: performance analysis and automated tuning Project description: PFLOTRAN is a massively parallel code developed at LANL for the accurate prediction of multiscale subsurface processes. PFLOTRAN has many applications and guides safer industrial techniques; for example, it can help geoscientists determine how carbon dioxide flows through aquifers and deep geologic formations during carbon-capture and storage. PFLOTRAN's performance has been studied extensively on Intrepid and Jaguar (Cray XT/5), but no performance studies on Intel-based clusters have been performed. The efficiency of the code is a small fraction of the peak on both BG/P and Cray XT/5. In the first year of this project, we focused mainly on analyzing and improving the performance of the sequential portions of key computational kernels (matrix-vector product, triangular linear solution, and some of the chemistry computations), which required many single-core runs of these kernels. During the next year, we plan to study and possibly improve the scalability of the Jacobian computation and the linear system solution. We'll also investigate approaches for managing the load imbalance between the flow and transport stages. This will require a number of parallel scaling runs. We will use input decks that can run on different ranges of cores, from one node to the whole machine. We'll target runtimes of less than an hour in most cases (by changing the number of time evolution steps). Project URL: http://www.peri-scidac.org/perci/ Current FY Hours Used: undetermined amount New FY Requested allocation: 200000 Justification: Thank You, The LCRC Accounts System