Prevajanje modela OpenACC na nivoju izvorne kode

Vitek, Gregor (author), Slivnik, Boštjan (mentor)

Razvili smo prevajalnik, ki omogoča dodajanje direktiv OpenACC v programski jezik Java. Implementirali smo ga s pomočjo prevajanja na nivoju izvorne kode. Prevajalnik deluje kot predprocesor, ki javansko kodo z oznakami OpenACC prevaja v javansko kodo, ki uporablja vmesnik OpenCL za računanje na grafičnih procesnih enotah. Izhodna koda prevajalnika je prevedljiva s katerimkoli javanskim prevajalnikom in lahko teče na vseh računalnikih z Javinim navideznim strojem in podporo za OpenCL. Zaradi obsega standarda OpenACC smo se pri implementaciji osredotočili le na osnovno paralelizacijo zank in prenos podatkov med napravami. S prevajalnikom smo dosegli pospešitve izvajanja kompleksnih problemov za okoli 50\% in dosegli enak čas izvajanja kot z jezikom C++, ki uporablja OpenCL.

• Language: Slovenian
• Keywords: Prevajalnik, GPE, OpenACC, OpenCL
• Work type: Master's thesis/paper
• Organization: FRI - Faculty of Computer and Information Science
• Year: 2018
• PID: 20.500.12556/RUL-103938
• Publication date in RUL: 28.09.2018

Secondary language

• Language: English
• Title: Source-to-source Compilation of OpenACC

Abstract

The OpenACC framework was created to alleviate the problems with programming graphical processing unit. We implemented a compiler, which added OpenACC support to the Java programming language. We used source-to-source translation to compile Java code annotated with OpenACC directives into Java code which uses OpenCL to execute computations on the GPU. The code compiled with our compiler is compatible with any Java compiler and runs on any machine that supports the Java virtual machine and OpenCL. Due to the size of the OpenACC standard, we focused mostly on the core features of the framework, such as loop parallelization and data transfer. The code generated with our compiler achieved around a 50\% speed-up, and achieved parity with native C++ programs using OpenCL.

• Keywords: Compiler, GPU, OpenACC, OpenCL