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Sunday, August 9, 2020 | History

2 edition of Inlining Java native calls at runtime. found in the catalog.

Inlining Java native calls at runtime.

Levon S. Stepanian

Inlining Java native calls at runtime.

by Levon S. Stepanian

  • 329 Want to read
  • 10 Currently reading

Published .
Written in English


About the Edition

This thesis addresses the performance issues associated with the JNI by providing a strategy that transforms JNI callbacks into semantically equivalent but significantly cheaper operations at runtime. In order to do so, the strategy first inlines native functions into Java applications using a Just-in-time (JIT) compiler. Native function inlining is performed by leveraging the ability to store statically-generated intermediate language alongside native binaries. Once inlined, transformed native code can be further optimized due to the availability of runtime information to the JIT compiler.Preliminary evaluations on a prototype implementation of our strategy show that it can substantially reduce the overhead of performing native calls and JNI callbacks, while preserving the opaque and binary-compatible characteristics of the JNI.Despite the overheads associated with the Java Native Interface (JNI), its opaque and binary-compatible nature make it the preferred interoperability mechanism for Java applications that use legacy, high-performance and architecture-dependent native code.

The Physical Object
Pagination80 leaves.
Number of Pages80
ID Numbers
Open LibraryOL19216590M
ISBN 100494071923

The first deals directly with native method programming. On the jnative-l list you will find discussions of JNI as well as old-style JDK native method programming, Microsoft's Runtime Native Interface (RNI), Netscape's Java Runtime Environment (JRE) and, to a lesser extent, problems with incorporating native code with various by:   Initially, "runtime inlining" sounds like a contradiction. Normaly you think of the compiler inlining so that something doesn't have to be referenced or looked up at runtime. The only thing I could guess to make sense of this was that the run time might look it up the first time but then inline it in active memory for subsequent calls.

  The Java Native Interface (JNI) is a framework that allows your Java code to call native applications and libraries written in languages such as C, C++ Author: Brian Schlining. Faster native methods. Faster native calls to the Java Native Interface (JNI) are available using the @FastNative and @CriticalNative annotations. These built-in ART runtime optimizations speed up JNI transitions and replace the now deprecated!bang JNI notation.

  Inlining only works if the compiler can decide on the exact method that a method call is targeting. Java code typically has a lot of indirect calls — calls to methods whose implementations are Author: Aleksandar Prokopec. Provides the Java Native Interface and recently Java Native Access as a way to directly call C/C++ code. Write once, compile anywhere (WOCA). Write once, run anywhere/everywhere (WORA/WORE). Allows procedural programming, functional programming, object-oriented programming, generic programming, and template metaprogramming. Favors a mix of.


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Inlining Java native calls at runtime by Levon S. Stepanian Download PDF EPUB FB2

Inlining java native calls at runtime. Our work leverages the ability to store statically-generated IL alongside native binaries, to facilitate native inlining at Java callsites at JIT compilation time.

Preliminary results with our prototype implementation show speedups of up to 93X when inlining and callback transformation are by: Levon Stepanian. University of Toronto, Toronto, ON, Canada. Inlining Java Native Calls at Runtime (CASCON – 4th Workshop on Compiler Driven Performance) Levon Stepanian, Angela Demke Brown Computer Systems Group Department of Computer Science, University of Toronto Allan Kielstra.

tion inlining will exp ose native co de to other optimization opp ortunities, and reduce the need for the JIT compiler to mak e conserv ative assumptions when optimizing Jav a co de. Our work leverages the ability to store statically-generated IL alongside native binaries, to facilitate native inlining at Java callsites at JIT compilation time.

Preliminary results with our prototype implementation show speedups of up to 93X when inlining and callback transformation are combined. A couple of examples I’ve seen where native method calls were used for performance reasons were intensive number-crunching for a scientific application and parsing large amounts of data in restricted time.

In these and other cases, the runtime application environment at the time could not get to the required speed using Java. Our work leverages the ability to store statically-generated IL alongside native binaries, to facilitate native inlining at Java callsites at JIT compilation time.

Preliminary results with our prototype implementation show speedups of up to 93X when inlining and callback Inlining Java native calls at runtime. book are combinedAuthor: Levon Stepanian and Gita Koblents.

In computing, inline expansion, or inlining, is a compiler optimization that replaces a function call site with the body of the callee. This optimization may improve time and space usage at runtime, at the possible cost of increasing the size of the final program.

Inlining is an optimization performed by the Java Just-In-Time compiler. If you have a method: public int addPlusOne(int a, int b) { return a + b + 1; } which you call like this: public void testAddPlusOne() { int v1 = addPlusOne(2, 5); int v2 = addPlusOne(7, 13); // do something with v1, v2 }.

Inlining Java Native Calls At Runtime Levon Stepanian Dept. of Computer Science University of Toronto Toronto, Ontario [email protected] Angela Demke Brown Dept. of Computer Science University of Toronto Toronto, Ontario [email protected] Allan Kielstra IBM Toronto Software Lab Toronto, Ontario [email protected] Gita Koblents IBM Toronto Software LabCited by:   This article details the process of calling native C/C++ code (in a DLL) from Java using JNI (Java Native Interface).

This article presumes a working knowledge of the Visual C++ command-line compiler, Make sure that you are using a version of Microsoft's SDK for Java that supports JNI. It had been a long time since I had a need to call a system process from inside Java.

The last time I needed to do this, I used (). Now there is a new sheriff in town Author: Norris Shelton. The Java Native Interface (JNI) is a standard to integrate in a portable way C++ and Java code. It works in both directions: you can call a C++ library from Java or you can call Java components from C++.

In this tutorial, I'll explain the second approach. Background/5(27). Inlining java native calls at runtime. In Proceedings of the 1st ACM/USENIX International Conference on Virtual Execution Environments (VEE’05). ACM, New York, NY, Author: GrimmerMatthias, SchatzRoland, SeatonChris, WürthingerThomas, LujánMikel, MössenböckHanspeter.

The Use of Traces for Inlining in Java Programs information regarding frequently-executed call edges to drive inlining decisions [2, 19, 25]. refers to the runtime optimization of a native. I've seen native method calls used for performance reasons in earlier Java versions when doing intensive number-crunching for a scientific application and parsing large amounts of data in a restricted time.

In these and other cases, the runtime application environment at the time could not get to the required speed using Java. Inlining and devirtualization. Inlining is the most profitable compiler optimization – Rather straightforward to implement – Huge benefits: expands the scope for other optimizations.

OOP needs polymorphism, that implies virtual calls – Prevents naïve inlining – Devirtualization is requiredFile Size: 2MB. Native Method Stacks When a thread invokes a native method, it enters a new world in which the structures and security restrictions of the Java virtual machine no longer hamper its freedom.

A native method can likely access the runtime data areas of the virtual machine (it depends upon. The Java Native Interface (JNI) enables Java code running in a Java Virtual Machine (JVM) to call and to be called by native applications (programs specific to a hardware and operating system platform) and libraries written in other languages, such as C, C++ and assembly.

JNI can be used: To implement or use features that are platform-specific. How Inlined Code Makes For Confusing Profiles In Java almost all method calls are 'virtual'. This means that at runtime any number of implementations could possibly exist for a particular call.

This is traditionally where you'd give up on inlining. To make inlining happen anyway the compiler must convert a virtual call into a static call.This chapter describes the implementation of the Java Virtual Machine (JVM) and the main features of the Java HotSpot technology: Adaptive compiler: A standard interpreter is used to launch the the application runs, the code is analyzed to detect performance bottlenecks, or hot Java HotSpot VM compiles the performance-critical portions of the code for a boost in.Note that Java calling sequences are completely independent from native calling sequences.

The JVM defines its own private “ABI” (application binary interface) for Java-to-Java calls. This means that Java-to-C calls in general require some argument shuffling, register saving, and other book-keeping.