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Every year football clubs trade players in order to build competitive rosters able to compete for success, increase the number of their supporters and amplify sponsors and media attention. In the complex system described by the football transfer market can we identify the strategies pursued by successful teams? Where do they search for new talents? Does it pay to constantly change the club roster?...
Software instrumentation has been a convenient and portable approach for dynamic analysis, debugging, or profiling of program execution. Unfortunately, instrumentation may change the temporal behavior of multi-threaded program execution and result in different ordering of thread operations, which is called probe effect. While the approaches to reduce instrumentation overhead, to enable reproducible...
In this paper we present a cycle-accurate performance analysis method for real-time systems that incorporates the following phases: (a) profiling SW components at high accuracy, (b) modeling the obtained performance measurements in MARTE-compatible models, (c) generation, scheduling analysis and simulation of a system model, (d) analysis of the obtained performance metrics and (e) a subsequent architecture...
We achieve very small runtime overhead: approximately a 1.2-10 times slowdown and moderate memory consumption. We demonstrate the effectiveness of Parallel Prophet in eight benchmarks in the Omp SCR and NAS Parallel benchmarks by comparing our predictions with actual parallelized code. Our simple memory model also identifies performance limitations resulting from the memory system contention. We present...
Frequently one has to search within a finite population for a single particular individual or item with a rare characteristic. Whether an item possesses the characteristic can only be determined by inspection. The availability of additional information about the items in the population opens the way to more effective inspection than just random or complete inspection of the population. We will assume...
The design of embedded systems is often subject to strict requirements concerning various aspects, including real-time performance, power consumption and die area. For mobile devices especially, power consumption is often the most important issue. In order to meet these requirements an adequate system architecture needs to be designed and the embedded software needs to be optimized. For complex applications,...
This paper deals with the binary analysis of executable programs, with the goal of understanding how they access memory. It explains how to statically build a formal model of all memory accesses. Starting with a control-flow graph of each procedure, well-known techniques are used to structure this graph into a hierarchy of loops in all cases. The paper shows that much more information can be extracted...
Performance estimation is a key step in the development of an embedded system. Normally, the performance evaluation is performed using a simulator or a performance mathematical model of the target architecture. However, both these approaches are usually based on the knowledge of the architectural details of the target. In this paper we present a methodology for automatically building an analytical...
The architectures which support modern supercomputing machinery are as diverse today, as at any point during the last twenty years. The variety of processor core arrangements, threading strategies and the arrival of heterogeneous computation nodes are driving modern-day solutions to petaflop speeds. The increasing complexity of such systems, as well as codes written to take advantage of the new computational...
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