This dissertation presents several techniques to accelerate Java locks based on the analyses of their behavior from various viewpoints. Ten years have passed since Java was announced, and now the language has come to be used in various fields including large-scale Web services. To make such applications practical, performance improvements for the Java execution environments are indispensable. I...

Concurrent programming with threads heavily relies on locks. The locks provided by most threading systems are rather basic and suffer from a variety of problems. This paper addresses some of them, namely deadlocks, lack of exception-safety, and their procedural style. We describe higher-level locks that can be assembled from the more basic ones. Throughout the paper, we refer to C++ and OpenMP ...

BACKGROUND Lock-therapy with antimicrobials has been used for the treatment and prevention of catheter-related bloodstream infections (CR-BSI). Experiences with Ethanol-Locks (E-locks) have included therapeutic interventions with variable results. Patients undergoing Major Heart Surgery (MHS) are a high-risk population for CR-BSI.The aim of this study was to assess the efficacy and tolerance to...

Modern multiprocessor architectures such as CC-NUMAmachines or CMPs have nonuniform communication architectures that render programs sensitive to memory access locality. A recent paper by Radović and Hagersten shows that performance gains can be obtained by developing general-purpose mutual-exclusion locks that encourage threads with high mutual memory locality to acquire the lock consecutively...

One of the major productivity issues in parallel programming arises from the use of lock/unlock operations or atomic/critical sections to enforce mutual exclusion. Not only are these constructs complicated to understand and debug, but they are also often an impediment to achieving scalable parallelism. In this paper, we propose to give the programmer the convenience of critical sections combine...