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Full-Text Articles in Engineering
Enhancing Spatial Locality Via Data Layout Optimizations, Mahmut Kandemir, Alok Choudhary, J. Ramanujam, N. Shenoy
Enhancing Spatial Locality Via Data Layout Optimizations, Mahmut Kandemir, Alok Choudhary, J. Ramanujam, N. Shenoy
Electrical Engineering and Computer Science - All Scholarship
This paper aims to improve locality of references by suitably choosing array layouts. We use a new definition of spatial reuse vectors that takes into account memory layout of arrays. This capability creates two opportunities. First, it allows us to develop an array restructuring framework based on a combination of hyperplane theory and reuse vectors. Second, it allows us to observe the effect of different array layout optimizations on spatial reuse vectors. Since the iteration space based locality optimizations also change the spatial reuse vectors, our approach allows us to compare the iteration-space based and data-space based approaches in terms …
Compilation Techniques For Out-Of-Core Parallel Computations, Mahmut Kandemir, Alok Choudhary, J. Ramanujam, Rajesh Bordawekar
Compilation Techniques For Out-Of-Core Parallel Computations, Mahmut Kandemir, Alok Choudhary, J. Ramanujam, Rajesh Bordawekar
Electrical Engineering and Computer Science - All Scholarship
The difficulty of handling out-of-core data limits the performance of supercomputers as well as the potential of the parallel machines. Since writing an efficient out-of-core version of a program is a difficult task and virtual memory systems do not perform well on scientific computations, we believe that there is a clear need for compiler directed explicit I/O approach for out-of-core computations. In this paper, we first present an out-of-core compilation strategy based on a disk storage abstraction. Then we offer a compiler algorithm to optimize locality of disk accesses in out-of core codes by choosing a good combination of file …
Integrating Security Into The Curriculum, Cynthia E. Irvine, Shiu-Kai Chin, Deborah Frincke
Integrating Security Into The Curriculum, Cynthia E. Irvine, Shiu-Kai Chin, Deborah Frincke
Electrical Engineering and Computer Science - All Scholarship
The number of skilled practitioners of computer security who are able to address the complexities of modern technology and are familiar with successful approaches to system security is very small. People want security but are faced with two difficulties. First, they do not know how to achieve it in the context of their enterprises. They may not even know of a way to translate organizational procedures into policies, much less implement a set of mechanisms to enforce those policies. Second, they have no way of knowing whether their chosen mechanisms are effective. The recent US Presidential Commission on Critical Infrastructure …