Our research group has proposed a new high performance computing architecture, which we call the λ computing environment. In the λ computing environment, every computing node has a shared memory connected with the optical wavelength path. In this paper, we execute an application of OpenMP, Parallel Programming API, and evaluate the performance of the λ computing environment. The results show an...

For this poster, the usability of the two most common IO libraries for parallel IO was evaluated, and compared against a pure MPI-IO implementation. Instead of solely focusing on the raw transfer bandwidth achieved, API issues such as data preparation and call overhead were also taken into consideration. The access pattern resulting from parallel IO in unstructured grid applications, which is a...

There are tools that alleviate the task of the developer. They offer a suitable abstraction of the communication between two disjoint program parts that is close to the typical means of exchanging information in an imperative programming language: a procedure call or a method invocation. These techniques are called middleware because they bridge the abstraction of the operating systems API with...

This report presents a toolkit for deploying applications on Grid environment called Grid Application Deployment Kit. It assists engineers and scientists in solving the problems on the Grid environment effectively based on robust Grid technologies and GridRPC API, a Remote Procedure Call standard interface for Grid-enabled applications. In this report, we also present mechanisms to reduce commu...

Let's define a distribution model as a set of mechanisms to handle distribution for example, distributed object computing, Remote Procedure Call, and message passing. Middleware specifications such as CORBA or Java Message Service propose the API and protocols to support these models. (For example, CORBA supports distributed object computing, and Java Message Service supports message passing.) ...

Performance profiling of applications is often a challenging task. One problem in the analysis is that applications often spend significant amount of their time in the operating system. As a result, conventional user-level profilers can, at best, trace the performance bottleneck to a particular system call. This information is often insufficient for the programmer to deal with the performance p...

Programmers repeatedly reuse code snippets. Retyping boilerplate code, and rediscovering how to correctly sequence API calls, programmers waste time. In this paper, we develop techniques that automatically synthesize code snippets upon a programmer’s request. Our approach is based on discovering snippets located in repositories; we mine repositories offline and suggest discovered snippets to pr...

This paper describes the use of Intel Pentium-III SSE instructions for high-order control computations in a high-spinrate flywheel. This application is representative of many control environments that require both high performance and real-time guarantees. We find that the SSE instructions are able to provide a dramatic increase in performance but that they are difficult to use unless the progr...

Top-k queries over data streams is a well studied problem. There exists numerous systems allowing to process continuous queries over sliding windows. At the opposite, nonappend only streams call for ad-hoc solutions, e.g. tailormade solutions implemented in a mainstream programming language. In the meantime, the Stream API and lambda expressions have been added in Java 8, thus gaining powerful ...

Due to the disadvantages of signature-based computer virus detection techniques, behavior-based detection methods have developed rapidly in recent years. However, current popular behavior-based detection methods only take API call sequences as program behavior features and the difference between API calls in the detection is not taken into consideration. This paper divides virus behaviors into ...