Overview of excelsior JET, a high performance alternative to java virtual machines

Mikheev, V. P.; Gurchenkov, D.; Pavlov, Pavel Yu.; Sukharev, Vladimir V.; Markov, Alexey; Kuksenko, Sergey V.; Fedoseev, Stanislav A.; Leskov, D.; Yeryomin, A.

doi:10.1145/584369.584387

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…celsior JET [24], the newly specialized class is compiled to native code without interpretation, thus no type profiles are available and no inlining takes place for the miniboxing runtime. In contrast to dispatching, type tag switching only requires loading-time constant propagation and dead code elimination to remove the overhead of the miniboxing runtime.…”

Section: Benchmark Resultsmentioning

confidence: 99%

Miniboxing

Ureche

Talau

Odersky

2013

Proceedings of the 2013 ACM SIGPLAN International Conference on Object Oriented Programming Systems Languages &Amp; Application

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Parametric polymorphism enables code reuse and type safety. Underneath the uniform interface exposed to programmers, however, its low level implementation has to cope with inherently non-uniform data: value types of different sizes and semantics (bytes, integers, floating point numbers) and reference types (pointers to heap objects). On the Java Virtual Machine, parametric polymorphism is currently translated to bytecode using two competing approaches: homogeneous and heterogeneous. Homogeneous translation requires boxing, and thus introduces indirect access delays. Heterogeneous translation duplicates and adapts code for each value type individually, producing more bytecode. Therefore bytecode speed and size are at odds with each other. This paper proposes a novel translation that significantly reduces the bytecode size without affecting the execution speed. The key insight is that larger value types (such as integers) can hold smaller ones (such as bytes) thus reducing the duplication necessary in heterogeneous translations. In our implementation, on the Scala compiler, we encode all primitive value types in long integers. The resulting bytecode approaches the performance of monomorphic code, matches the performance of the heterogeneous translation and obtains speedups of up to 22x over the homogeneous translation, all with modest increases in size.

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Section: Benchmark Resultsmentioning

confidence: 99%

Miniboxing

Ureche

Talau

Odersky

2013

Proceedings of the 2013 ACM SIGPLAN International Conference on Object Oriented Programming Systems Languages &Amp; Application

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“…The commercial product JamaicaVM uses an interpreter for dynamically loaded or not pre-compiled bytecode. Excelsior's "Just-Enough-Time" (JET)-Compiler for Java [27] provides an AOT compiler for Java. It generates a standalone application binary that can load and use a JIT compiler at execution time.…”

Section: State Of the Artmentioning

confidence: 99%

Reducing startup time of a deterministic virtualizing runtime environment

Däumler

Werner

2013

Proceedings of the 16th International Workshop on Software and Compilers for Embedded Systems

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Virtualized runtime environments like Java Virtual Machine (JVM) or Microsoft .NET's Common Language Runtime (CLR) introduce additional challenges to real-time software development. Since applications for such environments are usually deployed in platform independent intermediate code, one issue is the timing of code transformation from intermediate code into native code. We have developed a solution for this problem, so that code transformation is suitable for real-time systems. It combines pre-compilation of intermediate code with the elimination of indirect references in native code. The gain of determinism comes with an increased application startup time. In this paper we present an optimization that utilizes an Ahead-of-Time compiler to reduce the startup time while keeping the real-time suitable timing behaviour. In an experiment we compare our approach with existing ones and demonstrate its benefits for certain application cases.

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Modification of the ssapre algorithm for semantic code motion

Gurchenkov¹

Proceedings. The 8th Russian-Korean International Symposium on Science and Technology, 2004. KORUS 2004.

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Overview of excelsior JET, a high performance alternative to java virtual machines

Cited by 9 publications

References 4 publications

Miniboxing

Miniboxing

Reducing startup time of a deterministic virtualizing runtime environment

Modification of the ssapre algorithm for semantic code motion

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