Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"Access Pattern"”.
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Optimizing Parallel Input/output Using Adaptive File System Policies
… testbed. Sensor metrics that summarize dynamic access pattern information and file system performance effectively guide adaptive policy selection, affording significant performance improvements over less adaptive optimization strategies. Our results with both parallel access pattern benchmarks …
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Optimizing relational search with embedded neural network
… It learns to optimize the partitioned indexes access pattern to accelerate query performance. Using textual features of user queries, the classifier infers the index access pattern so that fuzzy string matching subqueries are efficiently evaluated. We studied various network architectures and …
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Adaptive Disk Striping for Parallel Input/output
… applications showed that, depending on the access pattern, adaptive striping can significantly improve input/output performance compared to striping with fixed value parameters.
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An Efficient Storage And Retrieval Mechanism For Large Unstructured Grids
… much of the research on efficient storage and access to spatial datasets has focused on large multidimensional arrays. In contrast, unstructured grids consisting of collections of implices (e.g. triangles or tetrahedra) present special challenges that have received less attention. Data values …
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Efficient Machine Learning Approach for Optimizing Scientific Computing Applications on Emerging HPC Architectures
… data-dependent control-flow and irregular memory accesses. Furthermore, these applications are often iterative with dependency between steps, and thus making it hard to parallelize across steps. As a result, parallelism in these applications is often limited to a single step. Numerical simulation …
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Oblivious RAM : from theory to practice
… in our data. This additional information, the access pattern, can be used to reverse-engineer proprietary programs as they run, reveal a user's physical location or health information, and more, even if data is correctly encrypted. This thesis studies a cryptographic primitive called Oblivious …
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Ascend : an architecture for performing secure computation on encrypted data
… Oblivious RAM (ORAM) techniques to hide memory access patterns and differential-power analysis (DPA) resistance techniques to hide data-dependent power draw. For each of the input/output and power channels, an Ascend chip exposes a set of public knobs that fully specify the observable behavior …
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Loop Transformations for the Optimized Generation of Reconfigurable Hardware
… loop transformations not only influence the data access pattern but also the control complexity we present a hardware loop controller architecture which supports hardware generation from the polyhedral representation used for loop transformations. The techniques are demonstrated by the …
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Parallel merge for many-core architectures
… optimizations include coordinating the memory access pattern, making full use of the shared memory and reducing the thread divergence. Our implementation achieves up to 10x and 40x speedup on Titan-Z and GTX 980 GPU respectively compared to thrust merge implementation.
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Run-time parallelization: A framework for parallel computation
… programs with regular, statically analyzable access patterns. However, if the memory access pattern of the program is input data dependent, then static data dependence analysis and consequently parallelization is impossible. Moreover, in this case the compiler cannot apply privatization and …
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NUMA Data-Access Bandwidth Characterization and Modeling
… performance by inflicting additional data-access performance penalties when accessing non-local data. In many modern NUMA architectures, both memory and I/O controllers are distributed within a node and CPU cores are logically divided into “local” and “remote” data-accesses within the …
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Proactive Management Of Lost Bank Cards
… student ID cards generate location-based access logs that can help analyse access pattern behaviour, enabling the detection of misplaced student cards and timely intervention of unauthorised access. Similarly, modelling the usage of equipment in industrial settings can facilitate fault …
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Optimal Oblivious RAM with Integrity
… about the underlying data, even via the access pattern. For a memory of size N, well-known lower bounds show that a multiplicative overhead of Ω(log N) in the number of RAM operations is necessary. A long sequence of works culminated in the asymptotically optimal construction of Asharov, …
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Analysis of Memory Access Patterns for Large Language Model Inference
… Training for neural networks also involves accesses in reverse order to what is used in inference, in a training technique called backpropagation. This thesis presents a memory access pattern heatmap tool that can track evolving access patterns through the lifetime of a workload. This tool …
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Techniques to maximize memory bandwidth on the Rigel compute accelerator
… memory requests in a way that achieves perfect access patterns as can be done with SIMD hardware. When a program can be decomposed statically and the computation does not vary among threads, then Rigel can achieve bandwidth similar to that of a GPU - but these are precisely the types of programs …
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Unified RAW Path Oblivious RAM
… a cryptographic primitive that conceals memory access patterns to untrusted storage. Its applications include oblivious cloud storage, trusted processors, software protection, secure multi-party computation, and so on. This thesis improves the state-of-the-art Path ORAM in several aspects. On …
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Smartphone traffic characteristics and context dependencies
… a variety of very different smartphone usage patterns occur. Participants accessed different types of Internet content at different times and under different circumstances. Differences between the usage of Wi-Fi and cellular networks for individual participants are observed. Download-intensive …
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Security Issues and Defense Methods for Wireless Medical Devices
… are designed to enable efficient and effective access control of wireless medical devices in both non-emergency and emergency situations. In recent years, the range of available wireless medical devices has increased and includes cardiac pacemakers, insulin pump, defibrillators, cochlear …
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Optimizing Data Accesses for Scaling Data-intensive Scientific Applications
… that are vastly different in terms of memory access pattern and workload variation. One includes those with multi-stride accesses in regular nested parallel loops. The other is for processing large-scale irregular social network graphs. In the former case, the memory location or the data item …
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High Performance Large Graph Analytics by Enhancing Locality
… reference refers to the phenomenon of frequently accessing the same memory location or adjacent memory locations. Applications with poor data locality reduce the effectiveness of the cache memory. They result in large number of cache misses, requiring access to high latency main memory. Therefore, …
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