Sökning: "hard real-time"

Visar resultat 26 - 30 av 106 avhandlingar innehållade orden hard real-time.

1. 26. Improving the Schedulability of Real Time Systems under Fixed Preemption Point Scheduling

   Författare :Filip Markovic; Jan Carlson; Radu Dobrin; Björn Lisper; Sebastian Altmeyer; José Javier Gutiérrez; Christian Berger; Mälardalens högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Real-Time Systems; Limited Preemptive Scheduling; Fixed Preemption Points Scheduling; Probabilistic response time analysis; Cache-Related Preemption Delay Analysis; Computer Science; datavetenskap;

   Sammanfattning : During the past decades of research in Real-Time systems, non-preemptive scheduling and fully preemptive scheduling have been extensively investigated, as well as compared with each other. However, it has been shown that none of the two scheduling paradigms dominates over the other in terms of schedulability. LÄS MER

3. 27. Techniques to Tighten the Upper Bound on the ExecutionTime of Task-based Parallel Applications

   Författare :Petros Voudouris; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Scheduling; Multiprocessor; WCET; Uniform; Hard; multicore; Related; DAG; Real-Time; Dynamic; Unrelated; Makespan; Homogeneous; Parallel; Identical;

   Sammanfattning : To use multiprocessors in hard real-time systems, schedulability analysis is needed to provide formally proven guarantees for the timing behavior of the system. Programming models for parallel applications, such as OpenMP, use pragmas to specify parts of the application as parallel tasks, for example, a function or a body of a loop. LÄS MER

4. 28. A Real-Time Soft Shadow Volume Algorithm

   Författare :Ulf Assarsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; three-dimensional graphics and realism; shading; pixel shaders; graphics hardware; shadowing; soft shadows; computer graphics;

   Sammanfattning : Rendering of shadows is a very important ingredient in three-dimensional graphics since they increase the level of realism and provide cues to spatial relationships. Area or volumetric light sources give rise to so called soft shadows, i.e., there is a smooth transition from no shadow to full shadow. LÄS MER

5. 29. Flexibility in Statically Scheduled Real-Time Systems

   Författare :Gerhard Fohler; Mälardalens högskola; []
   Nyckelord :;

   Sammanfattning : Static scheduling has been shown to be appropriate for a variety of hard real-time systems, mainly due to the verifiable timing behavior of the system and the complex task models supported. Its application is, however, impeded in systems with changing operational modes and critical activities, that arrive infrequently with unknown occurrence times. LÄS MER

7. 30. Optimizing Fault Tolerance for Real-Time Systems

   Författare :Dimitar Nikolov; Erik Larsson; Elena A. Troubitsyna; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : For the vast majority of computer systems correct operation is defined as producing the correct result within a time constraint (deadline). We refer to such computer systems as real-time systems (RTSs). LÄS MER