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  • unix career in programming

    - by mnunna
    I am currently working on a HP-UX platform and my role as a prod support team member involves mostly to write shell scripts. But I want to branch out into core systems programming in unix. A quick search on the internet threw no "unix systems programming jobs" in my area. I'm confused as what to do. I really would like to continue with unix as my core competency, but unix jobs are mostly of sys admin/ prod support type, of which I do not want a part of. Can anyone of you give me an informed advice on the career oppurtinities that await unix professionals?? Any advice would be appreciated.

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  • Grub-Efi wrong resolution

    - by Nikki Kononov
    My question, as it comes from the title, related to grub, but it's a different thing. I re-installed Windows 7 and Ubuntu 12.10 in UEFI mode (before that I was using normal BIOS) and everything went perfectly fine. Both systems load as they should but there is one thing that keeps bothering me. The problem is before I installed both systems in UEFI I used to boot in both system using common grub (non-uefi) and resolution in this grub was correct (which is 1366x768). Right now with grub-efi I have wrong resolution (which is seems to be 640x480). So my question is can can I safely set grub-resolution using grub config files or issue is related to something else? (for instance graphics card). I am using Ubuntu 12.10 Intel HD 3000 + Nvidia GT 540M Optimus (I am using bumblebee) Kernel 3.5.0-19-generic all updates installed! I also added ubuntu x-swat ppa for drivers. Thank you for your help!

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  • ArchBeat Link-o-Rama for 2012-09-07

    - by Bob Rhubart
    Oracle Technology Network Architect Day - Boston, MA - 9/12/2012 Sure, you could ask a voodoo priestess for help in improving your solution architecture skills. But there's the whole snake thing, and the zombie thing, and other complications. So why not keep it simple and register for Oracle Technology Network Architect Day in Boston, MA. There's no magic, just a full day of technical sessions covering Cloud, SOA, Engineered Systems, and more. Registration is free. Wednesday September 12, 2012 8:00 a.m. – 5:00 p.m. Boston Marriott Burlington, One Burlington Mall Road, Burlington, MA 01803 Attend OTN Architect Day in Los Angeles – by Architects, for Architects – October 25 The OTN Architect Day roadshow stops in Boston next week, then it's on to Los Angeles for another all architecture, all day event on Thursday October 25, 2012 at the Sofitel Los Angeles, 555 Beverly Boulevard, Los Angeles, CA 90048. Like all Architect Day events, this one is absolutley free, so register now. Webcast: Oracle WebCenter in Action: Hitachi Data Systems Catch this live webcast on Thursday, September 13, 2012 (10am PT / 1pm ET) to learn from speakers from Hitachi Data Systems, LingoTek, and Oracle about how Hitachi used Oracle WebCenter to improve the web experience for its international customers. Article Index: Architect Community Column in Oracle Magazine Did you know that Oracle Magazine features a regular column devoted specifically to the architect community? Every column includes insight and expertise from architects who regularly deal with the issues architects face. Click here to see a complete list of articles. ADF EMG Sunday at OOW 2012 (30. Sep 2012) - A day full of content | Frank Nimphius Frank Nimphius's shares details on Chris Muir's ADF EMG series of sessions during User Group Sunday at OOW, Sept 30, in Moscone West room 305. The Role of Oracle VM Server for SPARC in a Virtualization Strategy New OTN article from Matthias Pfützner. Countdown to Oracle OpenWorld 2012 | Oracle WebCenter Blog A helpful list of OOW sessions focused on Oracle WebCenter. Oracle Exalogic X2-2 walkthrough | Jan van Zoggel "For those of us not lucky enough to have one at home," Jan van Zoggel recommends this "very cool" video featuring "a detailed walkthrough explaining each component of a Oracle Exalogic X2-2 machine," presented by Oracle Exalogic VP Development Brad Cameron. September OTN Member Offers | OTN Blog Save big on books from top tech publishers with these discounts for OTN members. Thought for the Day "Only Robinson Crusoe had everything done by Friday." — Unknown Source: Quote Garden

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  • Mobile Money

    A cellphone-based cash transfer system has changed the way Kenyans handle their finances Business - Financial services - Kenya - Money Transfers - Other Payment Systems

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  • Why UFW has to be (re)started at boot time if it's only iptables rule manager?

    - by Tomasz Zielinski
    README from source package says: When installing ufw from source, you will also need to integrate it into your boot process for the firewall to start when you restart your system. Depending on your needs, this can be as simple as adding the following to a startup script (eg rc.local for systems that use it): # /lib/ufw/ufw-init start For systems that use SysV initscripts, an example script is provided in doc/initscript.example. See doc/upstart.example for an Upstart example. Consult your distribution's documentation for the proper way to modify your boot process. On my system I have this: # /etc/ufw/ufw.conf # # Set to yes to start on boot. If setting this remotely, be sure to add a rule # to allow your remote connection before starting ufw. Eg: 'ufw allow 22/tcp' ENABLED=yes So, why does simple iptables rule manager need to be started at boot time? Is there any secret to that, or it merely checks if all rules are in place ?

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  • New Procurement Report for Transportation Sourcing

    - by John Murphy
    Welcome to our fourth annual transportation procurement benchmark report. American Shipper, in partnership with the Council of Supply Chain Management Professionals (CSCMP) and the Retail Industry Leaders Association (RILA), surveyed roughly 275 transportation buyers and sellers on procurement practices, processes, technologies and results. Some key findings: • Manual, spreadsheet-based procurement processes remain the most prevalent among transportation buyers, with 42 percent of the total • Another 25 percent of respondents use a hybrid platform, which presumably means these buyers are using spreadsheets for at least one mode and/or geography • Only 23 percent of buyers are using a completely systems-based approach of some kind • Shippers were in a holding pattern with regards to investment in procurement systems the past year • Roughly three-quarters of survey respondents report that transportation spend has increased in 2012, although the pace has declined slightly from last year’s increases • Nearly every survey respondent purchases multiple modes of transportation • The number of respondents with plans to address technology to support the procurement process has increased in 2012. About one quarter of respondents who do not have a system report they have a budget for this investment in the next two years.

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  • Basics of ERP for dummies

    - by DarenW
    A situation has arisen where (if I don't scream and run away) I will be involved in an ERP system. This project will be using OpenERP specifically. My background is entirely science/engineering/music/games/art/whatever. I've never set foot in the realm of business systems or anything describable with the word "enterprise". What is a good introduction to the whole ERP concept, OpenERP and business systems in general suitable for those with flat zero experience in that world? The ideal intro would explain, from no assumptions, what the main ideas are, terminology, they style of work and thinking of people in that world, and maybe some concrete suggestions how one can tinker around with a copy of OpenERP to gain basic familiarity.

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  • E-Business Suite R12 Certified on 2012 Hyper-V Windows Guests

    - by John Abraham
    Oracle E-Business Suite Release 12 (12.1) is now certified on Windows Server 2008 (32-bit) and Windows Server 2008 R2 running as guest operating systems within Window Server 2012 Hyper-V virtual machines. Hyper-V is a built-in feature of Microsoft Windows Server that allows for the creation and management of virtualized computing environments. With this certification, the E-Business Suite is now supported on the above Windows virtualized guest operating systems in a similar way to non-virtualized Windows. References Note 761567.1 - Oracle E-Business Suite Installation and Upgrade Notes Release 12 (12.1.1) for Microsoft Windows Server (32-bit) Note 1188535.1 - Migrating Oracle E-Business Suite R12 to Microsoft Windows Server 2008 R2 Note 1563794.1 - Certified Software on Microsoft Windows Server 2012 Hyper-V Windows Server Hyper-V Overview

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  • News Flash: Hong Kong Housing Society Improves Governance Control, Reduces Costs by 25%, Speeds up Approval by 30%

    - by Ruma Sanyal
    “We selected Oracle Fusion Middleware for its superior local support, higher performance, availability, reliability, and flexible enterprise architecture to cost-effectively integrate with existing Oracle applications", said Mr. C.W. Miao, Head of Information Technology, Hong Kong Housing Society in a press release today. To address the challenge of frequent downtime during peak periods and increasing cost in maintaining its legacy systems, Hong Kong Housing Society replaced its legacy systems with Oracle's WebLogic Suite, BPM Suite, and the ADF Framework. The Fusion Middleware solutions provide Hong Kong Housing Society with a flexible, reliable and cost-effective enterprise architecture that enables integration with existing Oracle applications including JD Edwards EnterpriseOne and PeopleSoft. The cost savings and performance results clearly demonstrate significant benefits. Read the PR for complete details.

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  • Windows 7/Ubuntu 10.10 Dual-Triple Boot Partitioning Recommendation for HP Laptop OEM

    - by Denja
    Hi Linux Community, I find my self struggling with the ever slow and buggy windows OS once again. It's Time for me to go with the Ubuntu/Linux way for a better and faster Operating System. As a Computer technician i want to learn and use both Systems but possibly introduce New users to more affordable Linux Based Systems. For now, Im in the process of creating dual-boot or even triple boot layouts on my laptop machine Here's the layout in use now: * (C:) Windows 7 system partition NTFS - 284,89GB (Primary,Boot,Pagefile,Dump) * HP_TOOLS system partition FAT32 - 99MB (Primary) * (D:) RECOVERY partition NTFS - 12,90GB (Primary) * SYSTEM partition NTFS 199MB (Primary) Here's the layout I want to make. * (C:) Windows 7 system partition NTFS - 60GB (Primary) (sda1) * (D:) Windows data partition (user files) NTFS - 60GB(Extended or Primary)(sda2);wanna share with Linux * Linux root Ext4 - 10GB (Primary)(sda3) * Linux swap swap- RAM size, 3GB (sda4) * Linux home Ext4- 164,9GB (Extended)(sda5) Question 1: Based on my layout what is your suggestion for a Triple Boot layout for an additional Linux OS (Like Puppy)? Thank you in advance for your advises and suggestions.

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  • SmartView 11.1.2.2.103 - Support for MS Office 64 added

    - by THE
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 (thanks to Nancy, who shared this with me)  New for Smart View v11.1.2.2.103, Patch 14362638,   Microsoft Office 64-bit is now supported:  Information for 64-Bit Microsoft Office Installations: In this release, Smart View supports the 64-bit version on Microsoft Office. If you use 64-bit Office, please note the following: Oracle provides separate Smart View installation files for 64-bit and 32-bit Office systems. . smartview-x64.exe is the file for 64-bit Office installations. smartview.exe is the file for 32-bit Office installations. The 64-bit version of Smart View pertains only to the 64-bit version of Microsoft Office and not to the version of the operating system. Customers with 64-bit operating systems and the 32-bit version of Microsoft Office should install the 32-bit version of Smart View. You cannot install the 64-bit version of Smart View from EPM Workspace (13530466). Although Planning Offline is supported for 64-bit operating systems, it is not supported for 64-bit Smart View installations. If you use Planning Offline with Smart View, you must use the 32-bit version of Smart View and the 32-bit version of Microsoft Office. In 64-bit versions of Excel 2010 SP1, the presence of Smart View functions may cause Excel to terminate abruptly and may prevent Copy Data Point and Paste Data Point functions from working. This is a Microsoft issue, and a service request has been filed with Microsoft. Workaround: Until the Microsoft fix, use the 32-bit version of Smart View. (13606492) The Smart View function migration utility is not supported on 64-bit Office. (14342207) /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";}

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  • Oracle HCM Cloud Customer Q&A with WAXIE Sanitary Supply

    - by HCM-Oracle
    At this year’s Oracle HCM User Group (OHUG) Global conference, we had the opportunity to sit down with Oracle HCM Cloud customers for a short Q&A. We got to hear about what brought them to the OHUG conference, some of the benefits they are receiving from their Oracle HCM Cloud solutions, and advice they would give other businesses looking to move to the cloud.  Below is a discussion we had with Melissa Halverson, Benefits & HRIS Manager at WAXIE Sanitary Supply.  Q: What made you attend the OHUG Global Conference this year? Halverson: The biggest reason is networking. It allows me to connect with others in the Oracle HCM Cloud community. I was able to speak at the HCM Cloud SIG (Special Interest Group) on the first day and share my experiences as well as hear the experiences of other Oracle HCM Cloud users. It also allows me to get face-time with key people within Oracle.  Q: What Oracle HCM solutions are you currently using? Halverson: Global HR, Benefits, Workforce Compensation, and Performance Management. Q: Do you plan to invest further in Oracle HCM? Halverson: Yes, we are interested in Time and Labor. We would also like to get Recruiting at some point in the future. Q: What would you say is the most significant benefit you’ve realized from your use of Oracle HCM solutions? Halverson: First and foremost would be process improvement. Before we had Oracle HCM Cloud we relied on a paper process where something as simple as an employee address change required changes to be made manually in 9 different systems. Obviously that was extremely inefficient, but also increased the likelihood of errors being made.  The other huge benefit we have seen was in making information visible to the people that need it. Prior to implementing Oracle HCM Cloud, it was very difficult for anyone to access and make use of the information in our systems. Now, we can provide this information to those who need it to make better decisions.  Q: What advice would you give an organization looking to move their HR systems to the cloud? Halverson: One thing I think many organizations don't spend enough time doing is thoroughly vetting their implementation partner. I believe you should be vetting your implementation partner as much as you did the system itself. Also, manpower is so important. Involve as large a team as possible because you don’t want to get stuck having too few bodies to help out. And set realistic time frames. Biting off more than you can chew will inevitably result in failure. Having a phased approach is always best rather than trying to do everything at once. Thanks for the tips Melissa. Enjoy the rest of the conference!

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  • Hardware from Oracle, Pricing for Education (HOPE) Program: New version now available!

    - by Cinzia Mascanzoni
    With HOPE Version 5, Oracle offers education institutions even more unmatched savings on its award-winning systems products making it more affordable for educational institutions to create scalable, high-performing, and low TCO teaching and learning environments. With special discounts for you, on selected Sun products from Oracle, the net result is that you can assist your Resellers in reducing the impact on their customers' budget in two ways: • Lower the total cost for technology acquisition of systems and hardware, for the end user • Reduce the environmental impact of the educational institutions served by your Resellers, by running and maintaining a lower cost, more efficient infrastructure Start today to take advantage of the new release of this exciting program from Oracle. Check the EMEA VAD Resource Center for a description of the products and discounts offered to you and to find links to more detailed information about these Sun products.

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  • Offre demploi Job Offer - Montreal

    Im currently helping a client plan its management systems re-architecture and they are looking to hire a full time .NET developer.  Its a small 70 people company located in the Old Montreal, youll be the sole dev there and youll use the latest technologies in re writing their core systems. Heres the job offer in French: Concepteur de logiciel et programmeur-analyste .NET chevronn (poste permanent temps plein) Employeur : Traductions Serge Blair inc. Ville : Montreal QC TRSB, cabinet...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Offre demploi Job Offer - Montreal

    Im currently helping a client plan its management systems re-architecture and they are looking to hire a full time .NET developer.  Its a small 70 people company located in the Old Montreal, youll be the sole dev there and youll use the latest technologies in re writing their core systems. Heres the job offer in French: Concepteur de logiciel et programmeur-analyste .NET chevronn (poste permanent temps plein) Employeur : Traductions Serge Blair inc. Ville : Montreal QC TRSB, cabinet...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • New London based .NET User Group &ndash; first meeting June 2nd on MEF

    - by Eric Nelson
    A new .NET User Group is starting up in Canary Wharf - CWDNUG. It plans to focus on technology for financial services such as: WPF & Silverlight. F# & other alternative languages. High volume systems & complex event processing. Agile tools, methodologies and experiences. Open source systems that you can use (or that need your help!). Upcoming releases from Microsoft (WP7, VS2010, TPL). The first meeting is on June 2nd and Marlon (WPF MVP) will be speaking about MEF. Register today as there are only 15 spots left :-) (as of Thursday 20th May)

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  • Updated Oracle Platinum Services Certified Configurations

    - by Javier Puerta
    Effective May 22, 2014, Oracle Platinum Services is now available with an updated combination of certified components based on Oracle engineered systems: Oracle Exadata Database Machine, Oracle Exalogic Elastic Cloud, and Oracle SPARC SuperCluster systems. The Certified Platinum Configuration matrix has been revised, and now includes the following key updates: Revisions to Oracle Database Patch Levels to include 12.1.0.1 Addition of the X4-2 Oracle Exalogic system Removal of the virtualization column as the versions are not optional and are based on inclusion in integrated software Revisions to Oracle Exalogic Elastic Cloud Software to clarify patch level requirements for virtual and non-virtual environments For more information, visit the Oracle Platinum Services web page where you will find information such as customer collateral, FAQ's, certified configurations, technical support policies, customer references, links to related services and more.

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  • inforsacom ist Oracle EMEA Database Partner of the Year – wir gratulieren!

    - by A&C Redaktion
    Der Jubel war groß auf der Oracle Open World 2012 in San Francisco: inforsacom ist EMEA Specialized Database Partner of the Year! Bei der Verleihung betonte David Callaghan, Senior Vice President EMEA A&C, die Auszeichnung gehe an die spezialisierten Partner, „die höchste Level an Innovation und Leistungsfähigkeit in ihren Spezialgebieten erzielt haben.“ Die inforsacom Informationssysteme GmbH mit Sitz in Deutschland entwickelt und liefert seit 1997 integrierte IT-Lösungen im Data-Center. Die Auszeichnung des Platinum Partners ist die Krönung einer langjährigen erfolgreichen Zusammenarbeit mit Oracle. Kunden schätzen das Unternehmen als Experten für Infrastruktur-Lösungen und -Services im Bereich Rechenzentren. Neben dem Fokus auf Oracle Datenbank-Technologien ist inforsacom auch auf das Hardware- und Engineered Systems Portofolio spezialisiert. inforsacom hat als „trusted advisor“ immer den größtmöglichen Kundennutzen im Blick – das zahlt sich aus. Herzlichen Glückwunsch! Hier ist die Pressemeldung zur Award-Verleihung und das sind die Gewinner in den sechs weiteren Kategorien: Middleware: egabi Solutions (Ägypten) Applications: Accenture (Niederlande) Industry: Mannai Trading Corporation (Katar) Oracle Accelerate for Midsize Companies: Inoapps Ltd (United Kingdom) Oracle on Oracle: Capgemini Espania, S.L. (Spanien) Server and Storage Systems: Mannai Trading Corporation (Katar)

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  • inforsacom ist Oracle EMEA Database Partner of the Year – wir gratulieren!

    - by A&C Redaktion
    Der Jubel war groß auf der Oracle Open World 2012 in San Francisco: inforsacom ist EMEA Specialized Database Partner of the Year! Bei der Verleihung betonte David Callaghan, Senior Vice President EMEA A&C, die Auszeichnung gehe an die spezialisierten Partner, „die höchste Level an Innovation und Leistungsfähigkeit in ihren Spezialgebieten erzielt haben.“ Die inforsacom Informationssysteme GmbH mit Sitz in Deutschland entwickelt und liefert seit 1997 integrierte IT-Lösungen im Data-Center. Die Auszeichnung des Platinum Partners ist die Krönung einer langjährigen erfolgreichen Zusammenarbeit mit Oracle. Kunden schätzen das Unternehmen als Experten für Infrastruktur-Lösungen und -Services im Bereich Rechenzentren. Neben dem Fokus auf Oracle Datenbank-Technologien ist inforsacom auch auf das Hardware- und Engineered Systems Portofolio spezialisiert. inforsacom hat als „trusted advisor“ immer den größtmöglichen Kundennutzen im Blick – das zahlt sich aus. Herzlichen Glückwunsch! Hier ist die Pressemeldung zur Award-Verleihung und das sind die Gewinner in den sechs weiteren Kategorien: Middleware: egabi Solutions (Ägypten) Applications: Accenture (Niederlande) Industry: Mannai Trading Corporation (Katar) Oracle Accelerate for Midsize Companies: Inoapps Ltd (United Kingdom) Oracle on Oracle: Capgemini Espania, S.L. (Spanien) Server and Storage Systems: Mannai Trading Corporation (Katar)

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  • Why ISVs Run Applications on Oracle SuperCluster

    - by Parnian Taidi-Oracle
    Michael Palmeter, Senior Director Product Development of Oracle Engineered Systems, discusses how ISVs can easily run up to 20x faster, gain 28:1 storage compression, and grow presence in the market all without any changes to their code in this short video. One of the family of Oracle engineered systems products, Oracle SuperCluster provides maximum end-to-end database and application performance with minimal initial and ongoing support and maintenance effort, at the lowest total cost of ownership. Java or enterprise applications running on Oracle Database 11gR2 or higher and Oracle Solaris 11 can run up to 20X faster than traditional platforms on Oracle SuperCluster without any changes to their code.  Large number of customers are consolidating hundreds of their applications and databases on Oracle SuperCluster and are requiring their ISVs to support it. ISVs can become Oracle SuperCluster Ready and Oracle SuperCluster Optimized by joining the Oracle Exastack program. 

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  • Building a six-screen setup. What video cards options are there?

    - by Stephan
    I'm building myself a nice setup with a massive amount of screen real estate. Since I had/have problems with video drivers in the past. I'm asking for advise here first. I want to connect at least six screens. What are the best options? What are the pitfalls? I preferably would not like to use closed binary blob drivers. usecase scenario: I'm writing a piece of software that has to interact with other systems. I would like to be able to see all of those systems, my code, lots of log files and documentation without the need to swap windows/screens. To just better see what im doing.

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  • What Precalculus knowledge is required before learning Discrete Math Computer Science topics?

    - by Ein Doofus
    Below I've listed the chapters from a Precalculus book as well as the author recommended Computer Science chapters from a Discrete Mathematics book. Although these chapters are from two specific books on these subjects I believe the topics are generally the same between any Precalc or Discrete Math book. What Precalculus topics should one know before starting these Discrete Math Computer Science topics?: Discrete Mathematics CS Chapters 1.1 Propositional Logic 1.2 Propositional Equivalences 1.3 Predicates and Quantifiers 1.4 Nested Quantifiers 1.5 Rules of Inference 1.6 Introduction to Proofs 1.7 Proof Methods and Strategy 2.1 Sets 2.2 Set Operations 2.3 Functions 2.4 Sequences and Summations 3.1 Algorithms 3.2 The Growths of Functions 3.3 Complexity of Algorithms 3.4 The Integers and Division 3.5 Primes and Greatest Common Divisors 3.6 Integers and Algorithms 3.8 Matrices 4.1 Mathematical Induction 4.2 Strong Induction and Well-Ordering 4.3 Recursive Definitions and Structural Induction 4.4 Recursive Algorithms 4.5 Program Correctness 5.1 The Basics of Counting 5.2 The Pigeonhole Principle 5.3 Permutations and Combinations 5.6 Generating Permutations and Combinations 6.1 An Introduction to Discrete Probability 6.4 Expected Value and Variance 7.1 Recurrence Relations 7.3 Divide-and-Conquer Algorithms and Recurrence Relations 7.5 Inclusion-Exclusion 8.1 Relations and Their Properties 8.2 n-ary Relations and Their Applications 8.3 Representing Relations 8.5 Equivalence Relations 9.1 Graphs and Graph Models 9.2 Graph Terminology and Special Types of Graphs 9.3 Representing Graphs and Graph Isomorphism 9.4 Connectivity 9.5 Euler and Hamilton Ptahs 10.1 Introduction to Trees 10.2 Application of Trees 10.3 Tree Traversal 11.1 Boolean Functions 11.2 Representing Boolean Functions 11.3 Logic Gates 11.4 Minimization of Circuits 12.1 Language and Grammars 12.2 Finite-State Machines with Output 12.3 Finite-State Machines with No Output 12.4 Language Recognition 12.5 Turing Machines Precalculus Chapters R.1 The Real-Number System R.2 Integer Exponents, Scientific Notation, and Order of Operations R.3 Addition, Subtraction, and Multiplication of Polynomials R.4 Factoring R.5 Rational Expressions R.6 Radical Notation and Rational Exponents R.7 The Basics of Equation Solving 1.1 Functions, Graphs, Graphers 1.2 Linear Functions, Slope, and Applications 1.3 Modeling: Data Analysis, Curve Fitting, and Linear Regression 1.4 More on Functions 1.5 Symmetry and Transformations 1.6 Variation and Applications 1.7 Distance, Midpoints, and Circles 2.1 Zeros of Linear Functions and Models 2.2 The Complex Numbers 2.3 Zeros of Quadratic Functions and Models 2.4 Analyzing Graphs of Quadratic Functions 2.5 Modeling: Data Analysis, Curve Fitting, and Quadratic Regression 2.6 Zeros and More Equation Solving 2.7 Solving Inequalities 3.1 Polynomial Functions and Modeling 3.2 Polynomial Division; The Remainder and Factor Theorems 3.3 Theorems about Zeros of Polynomial Functions 3.4 Rational Functions 3.5 Polynomial and Rational Inequalities 4.1 Composite and Inverse Functions 4.2 Exponential Functions and Graphs 4.3 Logarithmic Functions and Graphs 4.4 Properties of Logarithmic Functions 4.5 Solving Exponential and Logarithmic Equations 4.6 Applications and Models: Growth and Decay 5.1 Systems of Equations in Two Variables 5.2 System of Equations in Three Variables 5.3 Matrices and Systems of Equations 5.4 Matrix Operations 5.5 Inverses of Matrices 5.6 System of Inequalities and Linear Programming 5.7 Partial Fractions 6.1 The Parabola 6.2 The Circle and Ellipse 6.3 The Hyperbola 6.4 Nonlinear Systems of Equations

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  • Take Two: Comparing JVMs on ARM/Linux

    - by user12608080
    Although the intent of the previous article, entitled Comparing JVMs on ARM/Linux, was to introduce and highlight the availability of the HotSpot server compiler (referred to as c2) for Java SE-Embedded ARM v7,  it seems, based on feedback, that everyone was more interested in the OpenJDK comparisons to Java SE-E.  In fact there were two main concerns: The fact that the previous article compared Java SE-E 7 against OpenJDK 6 might be construed as an unlevel playing field because version 7 is newer and therefore potentially more optimized. That the generic compiler settings chosen to build the OpenJDK implementations did not put those versions in a particularly favorable light. With those considerations in mind, we'll institute the following changes to this version of the benchmarking: In order to help alleviate an additional concern that there is some sort of benchmark bias, we'll use a different suite, called DaCapo.  Funded and supported by many prestigious organizations, DaCapo's aim is to benchmark real world applications.  Further information about DaCapo can be found at http://dacapobench.org. At the suggestion of Xerxes Ranby, who has been a great help through this entire exercise, a newer Linux distribution will be used to assure that the OpenJDK implementations were built with more optimal compiler settings.  The Linux distribution in this instance is Ubuntu 11.10 Oneiric Ocelot. Having experienced difficulties getting Ubuntu 11.10 to run on the original D2Plug ARMv7 platform, for these benchmarks, we'll switch to an embedded system that has a supported Ubuntu 11.10 release.  That platform is the Freescale i.MX53 Quick Start Board.  It has an ARMv7 Coretex-A8 processor running at 1GHz with 1GB RAM. We'll limit comparisons to 4 JVM implementations: Java SE-E 7 Update 2 c1 compiler (default) Java SE-E 6 Update 30 (c1 compiler is the only option) OpenJDK 6 IcedTea6 1.11pre 6b23~pre11-0ubuntu1.11.10.2 CACAO build 1.1.0pre2 OpenJDK 6 IcedTea6 1.11pre 6b23~pre11-0ubuntu1.11.10.2 JamVM build-1.6.0-devel Certain OpenJDK implementations were eliminated from this round of testing for the simple reason that their performance was not competitive.  The Java SE 7u2 c2 compiler was also removed because although quite respectable, it did not perform as well as the c1 compilers.  Recall that c2 works optimally in long-lived situations.  Many of these benchmarks completed in a relatively short period of time.  To get a feel for where c2 shines, take a look at the first chart in this blog. The first chart that follows includes performance of all benchmark runs on all platforms.  Later on we'll look more at individual tests.  In all runs, smaller means faster.  The DaCapo aficionado may notice that only 10 of the 14 DaCapo tests for this version were executed.  The reason for this is that these 10 tests represent the only ones successfully completed by all 4 JVMs.  Only the Java SE-E 6u30 could successfully run all of the tests.  Both OpenJDK instances not only failed to complete certain tests, but also experienced VM aborts too. One of the first observations that can be made between Java SE-E 6 and 7 is that, for all intents and purposes, they are on par with regards to performance.  While it is a fact that successive Java SE releases add additional optimizations, it is also true that Java SE 7 introduces additional complexity to the Java platform thus balancing out any potential performance gains at this point.  We are still early into Java SE 7.  We would expect further performance enhancements for Java SE-E 7 in future updates. In comparing Java SE-E to OpenJDK performance, among both OpenJDK VMs, Cacao results are respectable in 4 of the 10 tests.  The charts that follow show the individual results of those four tests.  Both Java SE-E versions do win every test and outperform Cacao in the range of 9% to 55%. For the remaining 6 tests, Java SE-E significantly outperforms Cacao in the range of 114% to 311% So it looks like OpenJDK results are mixed for this round of benchmarks.  In some cases, performance looks to have improved.  But in a majority of instances, OpenJDK still lags behind Java SE-Embedded considerably. Time to put on my asbestos suit.  Let the flames begin...

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