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 21 for “"Performance Tuning"”.
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Performance Tuning and Modeling of Communication in Parallel Applications
The goal of high performance computing is executing very large problems in the least amount of time, typically by deploying parallelization techniques. However, in- troducing parallelization to an application also introduces synchronization and com- munication overhead, which in turn creates a …
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Sonifying Performance Data to Facilitate Tuning of Complex Systems
… the modern computing landscape, the challenge of tuning software systems is exacerbated by the necessity to accommodate multiple divergent execution environments and stakeholders. Achieving optimal performance requires a different configuration for every combination of hardware setups and business …
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Automatic knobs-tuning for DB2 using deep reinforcement learning
… must be properly tuned in order to maximize the performance of the database for a given query workload. Traditionally, database administrators would be responsible for database performance tuning. However, manual configuration tuning is a difficult process for humans, as there are hundreds of …
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Advanced Structured Query Language Instruction for Engineers of the Office of Information Technology at Brigham Young University
… modules relating to advanced features and performance tuning of Oracle's Structured Query Language (SQL). SQLTips was developed using Wiki, server-side software that allows users to edit web pages with almost any browser. The report includes a literature review of existing SQL instructional …
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Design of a load-balancing architecture for parallel firewalls
… specific protocols. This situation creates a performance bottleneck. This thesis proposes a load-balancing firewall architecture to meet the Navy's needs. It first conducts an architectural analysis of the problem and then presents a high-level system design as a solution. Finally, the thesis …
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Globally Synchronized Frames for guaranteed Quality-of-Service in shared memory systems
… on multicore platforms results in greater performance variability of individual threads than traditionally seen with time-multiplexed threads on single-core platforms. This performance variability makes it hard to provide performance guarantees, degrades parallel program performance, and …
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Big data storage workload characterization, modeling and synthetic generation
… important to facilitate the proper design and performance tuning of storage subsystems like data replication, metadata management, and caching. Our hypothesis is that the autonomic modeling of Big Data storage system workloads through a combination of measurement, and statistical and machine …
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PICS - a Performance-analysis-based Introspective Control System to steer parallel applications
… (RTS) will be critical to reduce programmers' tuning efforts by automatically handling the complexities of applications and machines. This is the motivation for my research on a Performance-analysis-based Introspective Control System - PICS. PICS intelligently steers parallel applications and …
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Intelligent runtime tuning of parallel applications with control points
The tuning of parallel programs on large distributed-memory machines today is usually a costly, and often extensive, manual process. Automatic tuning techniques can help reduce this manual burden. This dissertation investigates the utility of a new class of automatic tuning methods for large-scale …
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Identifying, Quantifying, Extracting and Enhancing Implicit Parallelism
… by requiring explicit parallelization for performance. Implicit Parallelization is an alternative that could ease the burden on programmers by parallelizing applications “under the covers” while maintaining sequential semantics externally. This thesis develops a novel approach for thinking …
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Performance evaluation and enhancement of Dendro
… most of the execution-time. The single node performance and the overall performance of the package is dependent on the code-organization and class-hierarchy. We used the PETSC profiler to collect the performance statistics and instrument the code to know which part of the code takes most of …
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Self-adaptation via concurrent multi-action evaluation for unknown context
… implementation was in the domain of database performance tuning. The concrete implementation of the framework demonstrated the ability of concurrent multi-action evaluation technique to performance tune a database when performance is regressed for an unknown reason. The second implementation …
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Optimalizace provozních režimů zážehového motoru
Diplomová práce je zaměřena na optimalizaci provozních režimů zážehového motoru pomocí elektronické řídící jednotky. Zabývá se procesy probíhajícími při řízení motoru, popisem a vysvětlením jednotlivých signálů zpracovávaných a generovaných řídící jednotkou. Návrhem měřícího řetězce a …
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Low-overhead scheduling for improving performance of scientific applications
Application performance can degrade significantly due to node-local load imbalances during application execution on a large number of SMP nodes. These imbalances can arise from the machine, operating system, or the application itself. Although dynamic load balancing within a node can mitigate …
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Provenance-based computing
… retrospective analysis (root cause analysis, performance tuning) and hypothetical scenarios (what-if questions). In this context, provenance can be used as part of feedback loops, with a double purpose: building software that is able to adapt for meeting certain quality and performance targets …
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A resource management framework for cloud computing
… and virtualized data centers. First, parameter tuning of MapReduce jobs for efficient resource utilization is a daunting and time consuming task. Second, while the MapReduce model is designed for and leverages information from native clusters to operate efficiently, the emergence of virtual …
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Load Balancing Regular Meshes on SMPS with MPI
… strategy to a 3D jacobi algorithm, we achieve performance gains of at least 16% for 64 SMP nodes.
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Performance composability: An emerging challenge in performance-adaptive systems
… design techniques and software support for performance composition and dynamic performance management in large-scale performance-sensitive systems. The topic is motivated by the complexity of large-scale software systems due to increased use of automated adaptation policies in lieu of manual …
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Optimizing parallel I/O performance of HPC applications
… I/O is an essential component of modern High Performance Computing (HPC). Obtaining good I/O performance for a broad range of applications on diverse HPC platforms is a major challenge, in part because of complex inter-dependencies between I/O middleware and hardware. The parallel file system …
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A language and a system for program optimization
… applications commonly found in the high-performance computing (HPC) community. This dissertation presents Locus, a new system, and a language for optimizing complex, long-lived applications for different platforms. We describe the requirements that we believe are necessary for making …
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