Microservice Architecture (MSA) is a rising trend in software architecture design. Applications based on MSA are distributed applications whose components are microservices. MSA has already been adopted with great success by numerous companies, and a significant number of published papers discuss its advantages. However, the results of recent studies show that there are several important challenges in the adoption of microservices such as finding the right decomposition approach, heterogeneous technology stacks, lack of relevant skills, out-of-date documentation, etc. In this paper, we present Silvera, a Domain-Specific Language (DSL), and a compiler for accelerating the development of microservices. Silvera is a declarative language that allows users to model the architecture of microservice-based systems. It is designed so that it can be used both by inexperienced and experienced developers. The following characteristics distinguish Silvera from similar tools: (i) lightweight and editor-agnostic language, (ii) built with heterogeneity in mind, (iii) uses microservice-tailored metrics to evaluate the architecture of the designed system, and (iv) automatically generates the documentation. Silvera’s retargetable compiler transforms models into runnable code and produces the documentation for each microservice in the model. The compiler can produce code for any programming language or framework since code generators are registered as plugins. We present a case study that illustrates the use of Silvera and also discuss some current limitations and development directions. To evaluate Silvera, we conducted a survey based on A Framework for Qualitative Assessment of DSLs (FQAD), where we focused on the following DSL characteristics: functional suitability, usability, reliability, productivity, extendability, and expressiveness. Overall, the survey results show that Silvera satisfies these characteristics.

Alat hpcrun je prilagođen tako da koristi OMPT interfejs u cilju olakšane analize perfor­mansi izvornog koda OpenMP programa. Upotreba OMPT funkcija povratnog poziva može dovesti do dras­tičnog povećanja vremena izvršavanja prilikom merenja performansi OpenMP programa sa fino granulisanim paralelizmom.

The OpenMP 5 standard defines OMPT—an application programming interface for tools that includes a set of introspection routines. At any point in time, a sampling-based performance tool may invoke these introspection routines from a signal handler to inquire about the nesting of parallel and task regions. Unfortunately, the OpenMP 5 standard doesn’t precisely specify what one may observe with these routines when monitoring a program as it executes nested parallel regions. To address this shortcoming, we propose that the OpenMP standard require that an OpenMP implementation supports introspection consistency. This paper defines introspection consistency, describes why tools need it, and explains a novel strategy for implementing it using wait-free coordination between an OpenMP implementation and its OMPT introspection routines. We describe an implementation of this technique in the LLVM OpenMP runtime and evaluate the runtime overhead of supporting introspection consistency in LLVM OpenMP using a microbenchmark for nested parallel regions and SPEC OMP2012.