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  • Motivation and use of move constructors in C++

    - by Giorgio
    I recently have been reading about move constructors in C++ (see e.g. here) and I am trying to understand how they work and when I should use them. As far as I understand, a move constructor is used to alleviate the performance problems caused by copying large objects. The wikipedia page says: "A chronic performance problem with C++03 is the costly and unnecessary deep copies that can happen implicitly when objects are passed by value." I normally address such situations by passing the objects by reference, or by using smart pointers (e.g. boost::shared_ptr) to pass around the object (the smart pointers get copied instead of the object). What are the situations in which the above two techniques are not sufficient and using a move constructor is more convenient?

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  • OSB, Service Callouts and OQL - Part 1

    - by Sabha
    Oracle Fusion Middleware customers use Oracle Service Bus (OSB) for virtualizing Service endpoints and implementing stateless service orchestrations. Behind the performance and speed of OSB, there are a couple of key design implementations that can affect application performance and behavior under heavy load. One of the heavily used feature in OSB is the Service Callout pipeline action for message enrichment and invoking multiple services as part of one single orchestration. Overuse of this feature, without understanding its internal implementation, can lead to serious problems. This post will delve into OSB internals, the problem associated with usage of Service Callout under high loads, diagnosing it via thread dump and heap dump analysis using tools like ThreadLogic and OQL (Object Query Language) and resolving it. The first section in the series will mainly cover the threading model used internally by OSB for implementing Route Vs. Service Callouts. Please refer to the blog post for more details. 

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  • Google Places seo?

    - by sam
    Im familiar with seo and getting higher google listings but for allot of services google has recently been making there search results (were applicable) much more location orientated.. for instance searching for a "accountant in london" or "accountancy firm london" will through return the first half of page 1 as google places listings, then under about 6 of these you will get your normal search results so somone who used to rank #1 on page 1 now will rank effectily #7. What i was wandering is that i cant see any reasons as to why the company that rank high in the places results get there, often they are not high up in the search results. Is there a way to optimise on or offsite to rise up the google places listings in your city ?

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  • Compiling for T4

    - by Darryl Gove
    I've recently had quite a few queries about compiling for T4 based systems. So it's probably a good time to review what I consider to be the best practices. Always use the latest compiler. Being in the compiler team, this is bound to be something I'd recommend But the serious points are that (a) Every release the tools get better and better, so you are going to be much more effective using the latest release (b) Every release we improve the generated code, so you will see things get better (c) Old releases cannot know about new hardware. Always use optimisation. You should use at least -O to get some amount of optimisation. -xO4 is typically even better as this will add within-file inlining. Always generate debug information, using -g. This allows the tools to attribute information to lines of source. This is particularly important when profiling an application. The default target of -xtarget=generic is often sufficient. This setting is designed to produce a binary that runs well across all supported platforms. If the binary is going to be deployed on only a subset of architectures, then it is possible to produce a binary that only uses the instructions supported on these architectures, which may lead to some performance gains. I've previously discussed which chips support which architectures, and I'd recommend that you take a look at the chart that goes with the discussion. Crossfile optimisation (-xipo) can be very useful - particularly when the hot source code is distributed across multiple source files. If you're allowed to have something as geeky as favourite compiler optimisations, then this is mine! Profile feedback (-xprofile=[collect: | use:]) will help the compiler make the best code layout decisions, and is particularly effective with crossfile optimisations. But what makes this optimisation really useful is that codes that are dominated by branch instructions don't typically improve much with "traditional" compiler optimisation, but often do respond well to being built with profile feedback. The macro flag -fast aims to provide a one-stop "give me a fast application" flag. This usually gives a best performing binary, but with a few caveats. It assumes the build platform is also the deployment platform, it enables floating point optimisations, and it makes some relatively weak assumptions about pointer aliasing. It's worth investigating. SPARC64 processor, T3, and T4 implement floating point multiply accumulate instructions. These can substantially improve floating point performance. To generate them the compiler needs the flag -fma=fused and also needs an architecture that supports the instruction (at least -xarch=sparcfmaf). The most critical advise is that anyone doing performance work should profile their application. I cannot overstate how important it is to look at where the time is going in order to determine what can be done to improve it. I also presented at Oracle OpenWorld on this topic, so it might be helpful to review those slides.

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  • How to control fan speed and temperatures on Asus A8Js laptop running Ubuntu Server?

    - by Azeworai
    Hi, I have tried installing asusfan and lm-sensors but I'm unable to control my fans to cool my laptop down sufficiently. Currently it overheats at about 100 degrees celsius and my sensors output somehow does not have any fan information on it: jackson@OLYMPIA:~$ sensors acpitz-virtual-0 Adapter: Virtual device temp1: +69.0°C (crit = +110.0°C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +66.0°C (high = +100.0°C, crit = +100.0°C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +66.0°C (high = +100.0°C, crit = +100.0°C) I have checked my bios and there isn't any fan settings there. I can consistently overheat just by converting a video via Handbrake. I have ubuntu-desktop installed for a GUI. Is there a way for me to control my fans to start spinning before it reaches a critical temperature and kills itself?

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  • 5 Reasons to Upgrade to WebLogic Server 11g

    - by ruma.sanyal
    Do you want to optimize your middleware performance and manageability? Are you looking to modernize your IT infrastructure and lower your total cost of ownership? Don't miss this upcoming Webcast to learn five reasons why you should switch to Oracle WebLogic Server 11g. Mike Lehmann, Senior Director of Product Management for Oracle WebLogic Server, will share best practices and helpful tips for a fast, low-risk upgrade. You will also learn how your company can leverage the optimal support, rich capabilities, and extensive options in Oracle WebLogic Server 11g to: Diagnose and fix performance issues Improve data center utilization and density Shorten application release cycles Run applications in a shared services infrastructure Manage heterogeneous infrastructures Register for this complimentary Webcast.

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  • How to control fan speed and temperatures on Asus A8Js laptop?

    - by Azeworai
    Hi, I have tried installing asusfan and lm-sensors but I'm unable to control my fans to cool my laptop down sufficiently. Currently it overheats at about 100 degrees celsius and my sensors output somehow does not have any fan information on it: jackson@OLYMPIA:~$ sensors acpitz-virtual-0 Adapter: Virtual device temp1: +69.0°C (crit = +110.0°C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +66.0°C (high = +100.0°C, crit = +100.0°C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +66.0°C (high = +100.0°C, crit = +100.0°C) I have checked my bios and there isn't any fan settings there. I can consistently overheat just by converting a video via Handbrake. I have ubuntu-desktop installed for a GUI. Is there a way for me to control my fans to start spinning before it reaches a critical temperature and kills itself?

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  • All About Search Engine Position Optimization

    Search engine optimization or SEO is a method increasing the amount of traffic or hits to your website, which results in making your website rank high in search engine results. These results are produced whenever an individual types in a keyword or a set of keywords in a search query in search engines like Yahoo!, Google and the like. Being high on the list of search results matters a lot because it makes you more visible to the general public, especially to your target market. This differentiates you from your competitors who may rank low in the search results, or may not even appear in the results lists at all.

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  • New Content: Partner News and Workforce Management Special Report

    - by user462779
    Two new bits of content available on Profit Online: Oracle partner Edgewater Ranzal worked with customer High Sierra Energy to integrate Oracle Hyperion Enterprise Performance Management solutions with Oracle E-Business Suite and simplify an increasingly complex financial reporting system. "They needed to eliminate the older processes where 80% of the time was spent on collecting data and only 20% on analyzing the data.” --Bob Sanders, business development manager, Edgewater Ranzal. In a special report about Workforce Management, Profit wraps up a collection of recent content on the subject and looks at Oracle's recent agreement to acquire SelectMinds. “By adding SelectMinds to Oracle’s Talent Management Cloud, Oracle can help customers with a complete talent management solution, enabling streamlined recruiting practices, more quality referrals, faster employee on-boarding, and better performance.” --Thomas Kurian, Executive Vice President, Oracle Development More updates to come as we continue to add content to Profit Online on a regular basis. Thanks for reading!

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  • HTML5-Canvas: worth using ImpactJS or other framework?

    - by John
    I've been making an HTML5 game without any type of external framework. I haven't found a reason to use one so far. However, there is one thing I'm wondering about. On my Galaxy Nexus, I get about ~40fps. While that would usually be a decent framerate, my game is a rather fast paced game with a gamepad. Because of this, it feels very unsatisfying to play when not capped at 60fps. Are there frameworks out there that can improve performance without toning down on graphics? Or is there something I could do myself without necessarily having to use a framework? I've looked over the basic things such as sticking to integer coordinates, but I didn't see an increase in performance whatsoever? I did some testing with jsperf and results were virtually identical. Does this depend more on the browser?

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  • ORACLE UNIVERSITY

    - by mseika
    Expert Seminar in Dubai: How to choose your High-Availability solutions with Piet de Visser Oracle University's Expert Seminars are delivered by the best Oracle Gurus in the industry from all over the world. These unique and informative seminars are designed to provide you with expert insight in your area of interest. Piet de Visser is delivering the Expert Seminar ‘How to choose your High-Availability solutions’ on 8 November October in Dubai. You can find more information here. Please note: Your OPN discount is applied to the standard price shown on the website. For assistance with bookings contact Oracle University: eMail: [email protected] Telephone: +971 4 39 09 050

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  • Benchmarks Using Oracle Solaris 11

    - by Brian
    The following is a list of links to recent benchmarks which used Oracle Solaris 11. Oracle TimesTen In-Memory Database Performance on SPARC T4-2 World Record Performance on PeopleSoft Enterprise Financials Benchmark on SPARC T4-2 SPARC T4 Servers Running Oracle Solaris 11 and Oracle RAC Deliver World Record on PeopleSoft HRMS 9.1 SPEC CPU2006 Results on Oracle's Sun x86 Servers SPARC T4-4 Beats 8-CPU IBM POWER7 on TPC-H @3000GB Benchmark SPARC T4-2 Delivers World Record SPECjvm2008 Result with Oracle Solaris 11 SPARC T4-2 Server Beats Intel (Westmere AES-NI) on ZFS Encryption Tests SPARC T4 Processor Beats Intel (Westmere AES-NI) on AES Encryption Tests SPARC T4 Processor Outperforms IBM POWER7 and Intel (Westmere AES-NI) on OpenSSL AES Encryption Test SPARC T4-1 Server Outperforms Intel (Westmere AES-NI) on IPsec Encryption Tests SPARC T4-2 Server Beats Intel (Westmere AES-NI) on SSL Network Tests SPARC T4-2 Server Beats Intel (Westmere AES-NI) on Oracle Database Tablespace Encryption Queries

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  • Developing a computer system based on Nand2Tetris [on hold]

    - by Ryan
    I recently finished a book called Nand2Tetris (nand2tetris.org) where I built my own computer system from scratch with its own machine language, assembly code, and a high level language called Jack that's translated to Hack binary. However, I feel like the "computer" I built throughout the course of this book (called the Hack computer) is a bit too simple for various reasons: 1) There are only two registers (D and A), whereas most computers have much more 2) Peripheral devices like mouse and keyboard have to be directly implemented 3) Peripheral devices use a pre-planned shared memory map to communicate with the CPU instead of using interrupts (which aren't covered at all) 4) Jack (the high level language) code doesn't compile to Assembly code directly, instead it compiles to an intermediate language, which in turn gets translated to Assembly. 5) There is no ROM or permanent storage device, everything is stored in RAM 6) No support for colored monitor, networking or sound I would like to build a more complicated computer system now based on what I've learned from Nand2Tetris. Does anyone know of any good resources or books to get started on this? (BTW by computer system I mean software that can emulate the hardware of a virtual computer with its own unique instruction set)

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  • 2D vector graphic html5 framework

    - by Yury
    I trying to find html5 game framework by following criteria: 1)Real good performance. 2)Good support of vector graphic( objects which contains canvas elements -line, rec,bezierCurve etc.) 3)Easy port to mobile. Optional- Physics Engine. I found 1)Pixi.js- it looks like real good, but i didn't find any info about "vector objects" support. 2) i found "vector objects" support in paper.js I need something like these: http://paperjs.org/examples/chain/ and http://paperjs.org/examples/path-intersections/. But it looks like paper.js- not so good performance as pixi.js. And it is not game engine. Is there any good framework meets these requirements? P.S. I found similar question here Which free HTML5-based game engine meets these requirements?. But it was a long time ago. A lot of new things were created since 2011.

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  • Loud fans despite cool system under Linux (but not Windows)

    - by Sman789
    My new desktop computer runs almost silently under Windows, but the fans seem to run on a constantly high setting under Linux. Psensor shows that the GPU (with NVidia drivers) is thirty-something degrees and the CPU is about the same, so it's not just down to Linux somehow being more processor-intensive. I've read that the BIOS controls the fans under Linux, which makes sense given the high fan speeds when in BIOS as well. It's under Windows, when the ASUS AI Suite 3 software seems to take control, that the system runs more quietly and only speeds the fans up when required. So is there a Linux app which offers a similar dynamic control of the fans, or a setting hidden somewhere in the ASUS BIOS which allows the same but regardless of the OS? EDIT - I've tried using lm-sensors and fancontrol, but pwmconfig tells me "There are no pwm-capable sensor modules installed". This is after the sensors-detect command does find an 'Intel digital thermal sensor', and despite the sensors working fine in apps like psensor. Help getting this to work would likely solve the problem.

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  • Apress Books - 3 - Pro ASP.NET 4 CMS (ISBN 987-1-4302-2712-0) - Final comments

    - by TATWORTH
    This book is more than just  a book about an ASP.NET CMS system -  it has much practical advice and examples for the Dot Net web developer. I liked the use of JQuery to detect that JavaScript was not enabled. One chapter was about MemCached - this one chapter could justify the price of the book if you run a server farm and need to improve performance. Some links to get you started are: Windows Memcache at http://code.jellycan.com/memcached/ Dot Net Access Library at http://sourceforge.net/projects/memcacheddotnet/ The chapters on scripting, performance analysis and search engne optimisation all provide excellent examples. This certainly is a book that should be part of every Dot Net Web Development team library. Congratulations to the author and to Apress for publishing this book!

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  • Posting to facebook from unity3d on iOS and android

    - by Guye Incognito
    I've made a game in unity3d for iOS and android. We have our own server to manage high scores and stuff like that. We'd also like to have the possibility post high scores to facebook, and also do things like this.. If you and your friend are have both posted a score for our game to facebook and you post a better score then you can send them a notification. I'm reading around about this now, but I'm wondering whats the normal way people do this? Possible ways.. Use the unity facebook SDK Looks like it would work but there are different versions for iOS and android. Call the facebook graph API directly from our server. This would unify the iOS and android versions and also it makes sense as our server holds / deals with all the highscore info. I can just imagine difficulties with logging in / authentication

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  • Arçelik A.S. Uses Advanced Analytics to Improve Product Development

    - by Sylvie MacKenzie, PMP
    "Oracle’s Primavera P6 Enterprise Project Portfolio Management’s advanced analytics gives us better insight into the product development process by helping us to identify potential roadblocks.” – Iffet Iyigun Meydanli, Innovation and System Development Manager, R&D Center, Arçelik A.S. Founded in 1955, Arçelik A.S. is now the leading household appliance manufacturer in Turkey, and the third-largest household appliance company in Europe. It operates 14 production facilities in five countries (Turkey, Romania, Russia, China, and South Africa), with international sales and marketing offices in 20 countries. Additionally, the company manages 10 brands (Arçelik, Beko, Grundig, Blomberg, Elektrabregenz, Arctic, Leisure, Flavel, Defy, and Altus). The company has a household presence in more than 100 countries, including China and the United States. Arçelik’s Beko brand is among the top-10 household appliance brands in world, as a market leader for refrigerators, freezers, and washing machines in the United Kingdom. Arçelik implemented Oracle’s Primavera P6 Enterprise Project Portfolio Management for improved management of its design and manufacturing projects. With the solution, Arelik has improved its research and development (R&D) with the ability to evaluate technology risks when planning its projects. Also, it is now more easy to make plans for several locations, monitor all resources, and plan for future projects.  Challenges Improve monitoring of R&D resources?including human resources and critical laboratory equipment?to optimize management of the company’s R&D project portfolio Establish a transparent project platform to enable better product and process planning, gain insight into product performance, and facilitate advanced analytics that support R&D and overall business decisions Identify potential roadblocks for better risk management Solutions Worked with Oracle Partner PRM to implement Oracle’s Primavera P6 Enterprise Project Portfolio Management to manage the entire household-appliance, R&D project portfolio lifecycle, enabling managers and project leaders to better track and monitor resources and deliverables in real time Improved risk analysis and evaluation abilities for R&D projects Supported long-term planning needs Used advanced reporting features to capture data needed for budgeting and other project details, including employee performance evaluations Improved monitoring abilities and insight into the overall performance of products postproduction Enabled flexible, fast, and customized reporting with the P6 dashboard on a centralized platform to meet custom reporting needs for project leaders and support on-time and on-budget deliverables Integrated with other corporate departments, such as accounts payable, to upload project invoice data into the Primavera solution and the company’s e-mail system, so that project leaders will be alerted about milestones and other project related information Partner“Oracle Partner PRM provided us with a quick, reliable, and solution-focused approach to its support,” said Iffet Iyigun Meydanli, innovation and system development manager, R&D Center, Arçelik A.S. “The company’s service covered the entire spectrum of our needs, including implementation, training, configuration, problem solving, and integration.”

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  • Was a Big Fish in a Little Pond, Am Now a Little Fish in a Big Pond. How Do I Grow? [closed]

    - by Ziv
    I've finished high school where I was in the top three in my class, I studied a little and there too I was pretty much Big Fish in a bigger pond than high school. Now I got into my first job in a very big company, there are some incredibly talented programmers and researchers here (mostly in departments not related to mine) and for the first time I really feel like I'm incredibly average - I do not want to be average. I read technical books all the time, I try to code on my personal time but I don't feel like that's enough. What can I do to become a leading programmer again in this big company? Is there anything specifically that can be done to make myself known here? This is a very big company so in order to advance you must be very good and shine in your field.

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  • Need some help implementing VBO's with Frustum Culling

    - by Isracg
    i'm currently developing my first 3D game for a school project, the game world is completely inspired by minecraft (world completely made out of cubes). I'm currently seeking to improve the performance trying to implement vertex buffer objects but i'm stuck, i already have this methods implemented: Frustum culling, only drawing exposed faces and distance culling but i have the following doubts: I currently have about 2^24 cubes in my world, divided in 1024 chunks of 16*16*64 cubes, right now i'm doing immediate mode rendering, which works well with frustum culling, if i implement one VBO per chunk, do i have to update that VBO each time i move the camera (to update the frustum)? is there a performance hit with this? Can i dynamically change the size of each VBO? of do i have to make each one the biggest possible size (the chunk completely filled with objects)?. Would i have to keep each visited chunk in memory or could i efficiently remove that VBO and recreated it when needed?.

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  • Live Webcast: Private Cloud Database Consolidation with Oracle Exadata

    - by kimberly.billings
    Thursday, January 20th, 2011 at 9:00 am PT In this webcast, you'll learn how Oracle Exadata, Oracle Database 11g, and Oracle Real Application Clusters enable you to consolidate multiple applications on clustered server and storage pools to achieve extreme performance and lower your IT costs. You'll also learn how to maximize the efficiencies of private clouds, including: • Multitenancy • Rapid provisioning • Pay-for-use infrastructure Join us for this live Webcast and discover how Oracle Exadata delivers key cloud capabilities, providing elastic database services that can be quickly provisioned on demand. Register today! To learn more about how customers are consolidating on private clouds with Exadata, watch this video about how Commonwealth Bank of Australia consolidated multiple database services, including OLTP applications such as PeopleSoft Financials, onto an Exadata platform for improved performance and resilience and faster time-to-market.

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  • 12.04 Unity 3D 80% CPU load with Compiz

    - by user39288
    EDIT : I have been able to to determine that the problem is not compiz, but is actually Xorg. I don't know why, but by quickly maximizing terminal and taking a screenshot with top running before the problem went away I am able to see xorg takes up 72% of cpu, with bamfdaemon taking up 18%, and compiz taking up 14%. Seems the nvidia drivers are to blame, will play more with settings and perhaps do a clean nvidia-current install to try to fix the problem. Having a very annoying problem with high CPU usage. Running 12.04 with latest drivers and nvidia-current installed. Have not had any issues for days, now I have a strange problem. Unity 3d runs great most of the time, 1-2% CPU usage with only transmission running in background. Windows open and close smoothly. However,no matter what programs are open, if I minimize all open programs to the unity bar on the left, my CPU jumps to about 80% and slows down all maximize and minimize effects. Mouse movement stays smooth the whole time, but unity becomes unresponsive for up to 30 seconds at times. Hitting alt + tab to bring up even a single window fixes the problem. The window I bring back up doesn't even have to be maximized to solve the problem. Hitting the super button to bring up the dash makes CPU drop back to idle until I close it, then high CPU usage resumes. Believe the problem is compiz, but even just having only terminal running "top", I have to minimize it to the tray for the problem to show, so I can't see the problem process. I can only tell about the high CPU usage using indicator-sysmonitor. Even tried quitting the indicator, but I can still tell very poor performance with all applications when minimized. Reset compiz back to defaults, tried going to the post-release update nvidia drivers, played with vsync settings in both the nvidia settings and compiz. Even forced refresh rate, but cannot solve the problem. The problem does NOT occur in Unity 2D. Specs are core 2 duo 2.0ghz, 4GB ddr2 ram, 2x 320's HDD in RAID 0, and Nvidia GTX 260M graphics card.

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