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检索条件"主题词=scripting language"

共 83 条记录，以下是41-50 订阅

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A Rigorous Benchmarking and Performance Analysis Methodology for Python Workloads 16

A Rigorous Benchmarking and Performance Analysis Methodology...

引用

16th IEEE International Symposium on Workload Characterization (IISWC)

作者： Crape, Arthur Eeckhout, Lieven Univ Ghent Ghent Belgium

ISBN: (纸本)9781728176451

Computer architecture and computer systems research and development is heavily driven by benchmarking and performance analysis. It is thus of paramount importance that rigorous methodologies are used to draw correct conclusions and steer research and development in the right direction. While rigorous methodologies are widely used for native and managed programming language workloads, scripting language workloads are subject to ad-hoc methodologies which lead to incorrect and misleading conclusions. In particular, we find incorrect public statements regarding different virtual machines for Python, the most popular scripting language. The incorrect conclusion is a result of using the geometric mean speedup and not making a distinction between start-up and steady-state performance. In this paper, we propose a statistically rigorous benchmarking and performance analysis methodology for Python workloads, which makes a distinction between start-up and steady-state performance and which summarizes average performance across a set of benchmarks using the harmonic mean speedup. We find that a rigorous methodology makes a difference in practice. In particular, we find that the PyPy JIT compiler outperforms the CPython interpreter by 1.76x for steady-state while being 2% slower for start-up, which refutes the statement on the PyPy website that 'PyPy outperforms CPython by 4.4x on average' based on the geometric mean speedup and not making a distinction between start-up and steady-state. We use the proposed methodology to analyze Python workloads which yields several interesting findings regarding PyPy versus CPython performance, start-up versus steady-state performance, the impact of a workload's input size, and Python workload execution characteristics at the microarchitecture level.

关键词： benchmarking computer architecture performance analysis Python scripting language

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Running language Interpreters Inside SGX: A Lightweight, Legacy-Compatible Script Code Hardening Approach 19

Running Language Interpreters Inside SGX: A Lightweight, Leg...

引用

ACM Asia Conference on Computer and Communications Security (Asia CCS)

作者： Wang, Huibo Bauman, Erick Karande, Vishal Lin, Zhiqiang Cheng, Yueqiang Zhang, Yinqian Univ Texas Dallas Richardson TX 75083 USA Ohio State Univ Columbus OH 43210 USA Baidu USA Sunnyvale CA USA

ISBN: (纸本)9781450367523

Recent advances in trusted execution environments, specifically with Intel's introduction of SGX on consumer processors, have provided unprecedented opportunities to create secure applications with a small TCB. While a large number of SGX solutions have been proposed, nearly all of them focus on protecting native code applications, leaving scripting languages unprotected. To fill this gap, this paper presents ScriptShield, a framework capable of running legacy script code while simultaneously providing confidentiality and integrity for scripting code and data. In contrast to the existing schemes that either require tedious and time-consuming re-development or result in a large TCB by importing an entire library OS or container, ScriptShield keeps the TCB small and provides backwards compatibility (i.e., no changes needed to the scripting code itself). The core idea is to customize the script interpreter to run inside an SGX enclave and pass scripts to it. We have implemented ScriptShield and tested with three popular scripting languages: Lua, JavaScript, and Squirrel. Our experimental results show that ScriptShield does not cause noticeable overhead. The source code of ScriptShield has been made publicly available as an open source project.

关键词： SGX scripting language Confidentiality Integrity

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scripting Engine for SCADA HMI 2

Scripting Engine for SCADA HMI

引用

2nd International Conference for Convergence in Technology (I2CT)

作者： Tandel, Mrunali Joshi, Uday Golhani, Amit KJ Somaiya Coll Engn Dept Comp Engn Mumbai Maharashtra India Larsen & Toubro Elect & Automat Power Elect & Technol Ctr PEATC Navi Mumbai India

ISBN: (纸本)9781509043071

Conventionally, the modules of SCADA system such as Message broker, Human Machine Interface (HMI) Building Environment, Database Manager and drivers including the SCADA HMI are developed in compiler-based languages such as C/C++. Thus, the person who develops the SCADA HMI has to be well versed with that language whose learning curve is steep. Every time the user has to rely on the SCADA engineer to develop the SCADA HMI for them. Customization of SCADA HMI is a difficult task, as all the classes and the pointers in the language has to be managed by the SCADA Engineer, thus, increasing the time to market. scripting Engine module with combination of Qt technology is introduced in this study, which enables the SCADA Engineer to develop SCADA HMI using easy to use scripting language, balancing the time required for development as well as meeting the performance standards. As scripting languages are believed to be easily adoptable by the non-programmer, the person with the non-programming background can easily setup the SCADA screens. The comparative analysis of the scripting Engine approach and conventional approach is also presented in this study.

关键词： SCADA Human Machine Interface (HMI) Database Manager compiler-based language scripting language

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A Study of Memory Management for Web-based Applications on Multicore Processors 09

A Study of Memory Management for Web-based Applications on M...

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ACM SIGPLAN Conference on Programming language Design and Implementation

作者： Inoue, Hiroshi Komatsu, Hideaki Nakatani, Toshio IBM Tokyo Res Lab Yamato Kanagawa 2428502 Japan

ISBN: (纸本)9781605583921

More and more server workloads are becoming Web-based. In these Web-based workloads, most of the memory objects are used only during one transaction. We study the effect of the memory management approaches on the performance of such Web-based applications on two modern multicore processors. In particular, using six PHP applications, we compare a general-purpose allocator (the default allocator of the PHP runtime) and a region-based allocator, which can reduce the cost of memory management by not supporting per-object free. The region-based allocator achieves better performance for all workloads on one processor core due to its smaller memory management cost. However, when using eight cores, the region-based allocator suffers from hidden costs of increased bus traffics and the performance is reduced for many workloads by as much as 27.2% compared to the default allocator. This is because the memory bandwidth tends to become a bottleneck in systems with multicore processors. We propose a new memory management approach, defrag-dodging, to maximize the performance of the Web-based workloads on multicore processors. In our approach, we reduce the memory management cost by avoiding defragmentation overhead in the malloc and free functions during a transaction. We found that the transactions in Web-based applications are short enough to ignore heap fragmentation, and hence the costs of the defragmentation activities in existing general-purpose allocators outweigh their benefits. By comparing our approach against the region-based approach, we show that a per-object free capability can reduce bus traffic and achieve higher performance on multicore processors. We demonstrate that our defrag-dodging approach improves the performance of all the evaluated applications on both processors by up to 11.4% and 51.5% over the default allocator and the region-based allocator, respectively.

关键词： Dynamic memory management Region-based memory management scripting language Web-based applications

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Service architecture for 3rd party operator's participation

Service architecture for 3rd party operator's participation

引用

10th International Conference on Advanced Communication Technology

作者： Darvishan, A. H. Sarabchi, F. Yeganeh, H. Ahmadian, H. IRAN Telecommunication Research Center

ISBN: (纸本)9788955191356

Next generation networks with the idea of convergence of service and control layer in existing networks (fixed, mobile and data) and with the intention of providing services in an integrated network, has opened new horizon for telecom operators. On the other hand, economic problems has caused operators to look for new source of income including consider new services, subscription of more users and their promotion in using more network resources and easy participation of service providers or 3rd party operators in utilizing networks. With this requirement, an architecture based on next generation objectives for service layer is necessary. In this paper, a new architecture based on IMS model explains participation of 3rd party operators in creation and implementation of services on an integrated telecom network.

关键词： service model IMS API scripting language JAIN parlay

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mruby on TECS: Component-based Framework for Running Script Program 18

mruby on TECS: Component-based Framework for Running Script ...

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IEEE 18th International Symposium on Real-Time Distributed Computing Workshops

作者： Azumi, Takuya Nagahara, Yuki Oyama, Hiroshi Nishio, Nobuhiko Osaka Univ Grad Sch Engn Sci Suita Osaka 565 Japan Ritsumeikan Univ Grad Sch Informat Sci & Engn Kyoto Japan OKUMA Corp Oguchi Aichi Japan

ISBN: (纸本)9781479987818

scripting languages are attractive for embedded system due to their high productivity. However, it is difficult to use scripting languages in a practical application because their performance and libraries for managing embedded devices are immature compared to the C programming language. This paper proposes a framework for effectively running an mruby script program on embedded systems based on the TOPPERS Embedded Component System (TECS). TECS generates glue code for invocation from mruby programs to legacy code in C language. It also supports configuration of mruby. Experimental results demonstrate the effectiveness of the proposed framework.

关键词： Embedded Software scripting language based development

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EOQ: An Open Source Interface for a More DAMMMMN Domain-specific Model Utilization 24

EOQ: An Open Source Interface for a More DAMMMMN Domain-spec...

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24th International ACM/IEEE Conference on Model-Driven Engineering languages and Systems (MODELS)

作者： Annighoefer, Bjoern Brunner, Matthias Luettig, Bastian Schoepf, Julian Univ Stuttgart Inst Aircraft Syst Stuttgart Germany

ISBN: (纸本)9781665424844

Determinism, automation, multi-element, multimodel, multi-computer, multi-user support and neutrality (DAMMMMN) are in our opinion important qualities of domain-specific modeling, and are enablers for highly automated workflows and collaborative modeling. An improvement in any of these qualities eases the development of software using domain-specific models, and enables the design of more sophisticated Model-based Engineering Environments (MBEE). In the context of current programmatic interfaces for domain-specific models, we see room for improvement, and propose Essential Object Query (EOQ) as a generic interface between domain-specific (meta-)models and their users. This interface integrates ACID transactions, complex commands, model queries, reflection abstractions, mass data manipulation, object serialization, automation, notifications, change tracking, and a model database, such that a progranunatic decoupling between models and their usage is achieved. Our interface is agnostic with respect to the programming language(s) and domain-specific modeling framework(s). A prototype is implemented with Python on top of EMF's meta-model ECORE. An example of a signal routing application in an architecture model of a cyber-physical system is used to demonstrate our interface and to evaluate its impact on the individual DAMMMMN qualities.

关键词： collaborative modeling transaction domain-specific meta-model event query language model interface scripting language model database change-based

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Lightweight Ruby Framework for Improving Embedded Software Efficiency 4

Lightweight Ruby Framework for Improving Embedded Software E...

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4th IEEE International Conference on Cyber-Physical Systems, Networks, and Applications (CPSNA)

作者： Yamamoto, Takuro Oyama, Hiroshi Azumi, Takuya Osaka Univ Grad Sch Engn Sci Suita Osaka 565 Japan OKUMA Corp Okuma Fukushima Japan

ISBN: (纸本)9781509044030

Recently, the productivity of embedded systems applied to Cyber physical systems has become problematic due to their increasing complexity and scale. To improve the productivity, the mruby on TOPPERS embedded component system (TECS) framework, which employs scripting language (i.e., a lightweight Ruby) and supports component-based development, has been proposed. This paper proposes an extended framework of mruby on TECS that improves development efficiency more than the current version. In the proposed framework, a Bluetooth loader that receives an mruby bytecode, and a RiteVM scheduler that simplifies multitasking are implemented.

关键词： scripting language cyber physical systems embedded software component-based development

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ANTRL as a Development Platform for the Series DSL for the Learning Process 10

ANTRL as a Development Platform for the Series DSL for the L...

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10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems - Technology and Applications (IDAACS)

作者： Kandyba, Ihor Davydenko, Yevhen Panasyuk, Valentyna Shved, Alyona Fisun, Mykola Petro Mohyla Black Sea Natl Univ 1068 Desantnykiv St UA-54003 Mykolaiv Ukraine Ternopil Natl Econ Univ 3 Peremoga Sq UA-46020 Ternopol Ukraine

ISBN: (纸本)9781728140681

Recently, domain-specific language has become more popular in the IT market. Therefore, there are several variants of the domain-oriented programming languages used in the modern world. A variant of domain-specific language that accepts wind farm modeling language at the input and GPSS code at the output to model the queuing system has been proposed in this paper. The ANTLR grammar rules for the implementation of wind farm modeling language have been formed.

关键词： domain-specific language ANTLR programing language scripting language

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GAMESPECT: Aspect Oriented Programming for a Video Game Engine using Meta-languages

GAMESPECT: Aspect Oriented Programming for a Video Game Engi...

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IEEE SoutheastCon Conference

作者： Geisler, Benjamin J. Mitropoulos, Frank J. Kavage, Shane Nova Southeastern Univ Coll Engn & Comp Davie FL 33328 USA Univ Wisconsin Coll Sci Engn & Technol Green Bay WI USA

ISBN: (纸本)9781728101378

Video game programming is an area where code duplication is extremely prevalent. Similar types of tasks are performed in multiple places throughout a game engine codebase. For example: game balance, logging, and memory allocation are just a few of the areas which are located across disparate locations of the codebase. Meanwhile, aspect oriented programming (AOP) was created to make use of common themes in a codebase and allow for advice to be given during compilation or runtime. GAMESPECT is a Domain Specific language (DSL) which resides in a higher level language space, above the typical languages used by game engines such as Unreal Engine 4. The language is written with the popular XText language toolset and contains advices in the spirit of aspect oriented programming: point cuts and join points. These advices can be executed at runtime when the programmer wants to fine-tune values or perform debugging. The advising is made possible through the Clang toolchain. Unique to this approach, GAMESPECT takes a source language and converts into multiple target languages. Depending on the context, GAMESPECT can generate C++, LUA, Blueprints or Skookum Script. This type of source to source translation is made possible through GAMESPECT's "composition specifications". With GAMESPECT, video game designers can increase their productivity and reduce the required lines of code for certain tasks by a 9-40"/0 reduction. In addition, it provides for an AOP platform which is agnostic to the underlying game code. The applicability of this approach extends beyond game programming into software engineering as a whole.

关键词： multilanguage metalanguage aspect oriented DSL video game engine scripting language UE4

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