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 18 of 18 for “"WCET"”.
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Tunable WCET for hard real-time multicore system
… issue, this study proposes a new perspective of WCET model called tunable WCET, in which the WCET of a task is partitioned into fixed execution time and tunable delay. Our tunable WCET model enables WCET-aware shared resource allocation/arbitration by elastically deforming the tunable delays of …
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WCET Optimizations and Architectural Support for Hard Real-Time Systems
… estimate the worst-case execution time (WCET) of the real-time tasks but also desirable to improve either the WCET of the tasks or time predictability of the system, because the real-time tasks with lower WCETs are easy to schedule and more likely to meat their deadlines. As a real-time …
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Two concrete problems in timing analysis of embedded software
… an upper bound on the worst case execution time (WCET) of the program. The problem of determining WCET of a program by static analysis methods has to be solved at the following two levels (1) Programming language level, to determine the longest path in the program and (2) Micro-architectural …
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Worst-Case Timing Analysis of Concurrently Executing DMA I/O and Programs
… I/O task. We discuss the problem of bounding the WCET of a cycle-stealing DMA I/O task under a workload which consists of a set of independent CPU tasks. Each CPU task has an arbitrary release time. We use the dynamic programming technique to bound the WCET of the I/O task.
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Predictable inter-core communication for strictly partitioned real-time multi-core systems
… details is provided. A formula to derive WCET of the tasks using CCM is provided. We compare our CCM with Contention-based Communication (CBC) where no private banking is enforced for any core. The results of the analytical approach using San Diego Vision Benchmark Suite (SD-VBS) for two …
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Next-generation safety-critical systems using COTS based homogeneous multi-core processors and heterogeneous MPSoCS
… is interested in the worst-case execution time (WCET) of the task on each processing element in the system. The WCET of a task running on one of the processing elements in these high-performance multicore/MPSoCs changes as we activate more processing elements because of the contention on the …
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Light-PREM: automatically transforming existing applications to the Predictable Execution Model
… components. However, worst case execution times (WCET) are unreasonably high on these components, due to contention amongst resources. Past work has introduced the Predictable Execution Model (PREM) to solve this issue, but unfortunately, the time required to port existing code bases to this model …
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Optimization Techniques for Performance and Power Dissipation in Test and Validation
… it determines the worst case execution time (WCET) in the HDL code.
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Compositional Machine Learning for Time-Verifiable, Safe, and Explainable Cyber-Physical Systems
… systems), enabling Worst-Case Execution Time (WCET) analysis. Our compilers specifically support compositional ANN architectures, addressing a critical gap in existing tools. Moreover, we introduce a policy-driven framework for safe-by-construction ML systems that mines safety properties from …
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TIME-PREDICTABLE FAST MEMORIES: CACHES VS. SCRATCHPAD MEMORIES
… the complexity of worst-case execution time (WCET) analysis, which is crucial for real-time systems. This dissertation designs several time-predictable scratchpad memory (SPM) based architectures for both VLIW (Very Long InstructionWord) based single-core and multicore processors. First, this …
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Next-generation safety-critical systems on multi-core platforms
… the assumption that worst case execution time (WCET) can be calculated on individual tasks to compute the schedulability of the complete system when tasks are running together. This fundamental assumption has been broadly accepted by classic scheduling theory for the past three decades; …
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Bus scheduling implementation on the cell processor
… of a tight bound, worst case execution time (WCET) is difficult. The new generation computer architecture, Cell Broadband Engine Architecture (CBEA), has a software controlled front side bus (i.e. Element Interconnect Bus) that helps moderate the unpredictable task execution time problem. The …
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Design And Analysis Of Time-Predicatable Single-Core And Multi-Core Processors
… intra-block nop insertion to enable efficient WCET (Worst Case Execution Time) analysis for VLIW processors. Our time-predictable processor incorporates the instruction caches which can mitigate the latency of fetching instructions that hit in the cache. For instruction missing from the cache, …
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A Safety-Performance Framework for Computational Awareness in Autonomous Robots
… of deterministic worst-case execution time (WCET). We argue that computational tasks enabling robotic autonomy, such as localization and mapping, path planning, task allocation, depth estimation, and optical flow, must be scheduled and optimized to guarantee timely and correct behavior while …
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Fault Tolerance for Real-Time Systems: Analysis and Optimization of Roll-back Recovery with Checkpointing
… time (AET) and worst case execution time (WCET), where AET is used for soft RTSs, and WCET is used for hard RTSs. When fault tolerance is employed in both soft and hard RTSs, the time overhead caused due to usage of fault tolerance may be the reason that deadlines in RTSs are violated. …
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Environmental Chamber to Regulate Film Morphology for Solar Energy Materials Printing Using Additive Manufacturing and Investigating the Role of Additives in Perovskites
… room at the Washington Clean Energy Testbeds (WCET). Film deposition experiments were followed by microscopy, spectroscopy and absorbance studies on the printed films. Based on visual observation and morphology data, the print parameters and solution composition are then altered. A local …
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Toward Predictable and Efficient Deep Neural Network Inference on Graphics Processing Units
GPUs dominate DNN inference but remain difficult to control predictably under multi-tenant load. This thesis presents a practical, end-to-end approach for predictable, efficient single-GPU inference built around a closed loop of predict → allocate → power-tune. First, we introduce SGPRS, a …
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Timing analysis in existing and emerging cyber physical systems
… no information of Worst Case Execution Time (WCET) that can get impacted by other interference sources. Traditionally, a two-level scheduling, such as Integrated Modular Avionics system (IMA), has been used for providing temporal isolation capability. However, such hierarchical approaches …