We report results from the analysis of a 24-hour packet trace containing aggregate TCP traffic of approximately 1300 residential ADSL clients. We make observations similar to earlier studies by the research community: the major fraction of the total traffic originates from P2P applications and small fractions of connections and clients are responsible for the vast majority of the traffic. Howev...

Control applications are more and more an integral part of modern embedded systems. As a result, considering the quality of control applications as a design objective while respecting design constraints like stability becomes mandatory. The work at hand proposes a fullyautomatic toolflow at the Electronic System Level (ESL) that enables the optimization of a system implementation with quality o...

Selbständigkeitserklärung Hiermit erkläre ich, die vorliegende Arbeit selbständig verfasst zu haben. Ich habe keine anderen als die im Quellenverzeichnis angegebenen Literaturhilfsmittel verwendet.

Two new performance estimation algorithms are presented in this report. One is an optimal lower-bound prediction for the Resource Constrained Problem, and we propose a branch-andbound algorithm to obtain the exact solution by means of some novel bounding techniques. Experimental results show the efficiency and effect of this algorithm. The other is an approximate predication technique which is ...

In this paper we study possible improvements of high-level (architectural) synthesis processes. We allow the designer to indicate a set of bindings between behaviour and structure in order to add some of the designer's knowledge to the design process. These bindings can be used to exclude ineecient designs. The remaining design space may then be studied in more detail, using uniied backtracking...

better model the performance of network, this paper proposes a novel AS level network performance model (MNPM), it takes autonomous system (AS) as basic modeling unit, measures E2E performance between any two outdegrees of an AS and organizes measurement results into matrix form which called performance matrix (PM). Inter-AS performance calculation is defined according to performance informatio...

BitTorrent is one of the most popular Peer-to-Peer (P2P) content distribution applications over the Internet that significantly contributes in network

Coding parallel algorithms is generally regarded as a formidable task. To make this task manageable in the arena of linear algebra algorithms, we have developed the Parallel Linear Algebra Package (PLA-PACK), an infrastructure for coding such algorithms at a high level of abstraction. It is often believed that by raising the level of abstraction in this fashion, performance is sacriiced. Throug...

Advances across many fields of study are driving changes in the basic nature of scientific computing applications. Scientists have recognized a growing need to study phenomena by explicitly modeling interactions among individual entities, rather than by simply modeling approximate collective behavior. This entity-level approach has emerged as a promising new direction in a number of scientific ...

We propose a radical re-architecture of the traditional operating system storage stack to move the kernel off the data path. Leveraging virtualized I/O hardware for disk and flash storage, most read and write I/O operations go directly to application code. The kernel dynamically allocates extents, manages the virtual to physical binding, and performs name translation. The benefit is to dramatic...