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  • Windows 7 Task Manager Tips for Performance

    In Part 1 of this tutorial we looked at how the Task Manager in Windows 7 could be used to view the processes running on your computer and the memory usage associated with each. Let s continue by discussing some more tips on using the Task Manager to help identify any issues and improve your PC s performance.... Comcast? Business Class - Official Site Learn About Comcast Small Business Services. Best in Phone, TV & Internet.

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  • How to fix laggy mouse and keyboard on Ubuntu 10.04 LTS 64bit?

    - by Goi
    I've just installed Ubuntu 10.04 LTS 64bi on my i5-2400 system, and I'm experiencing very laggy keyboard and mouse input. I have to type really slowly or I some keys will not get registered. Also, the mouse cursor moves around very slowly at a very low frame rate. I've checked my keyboard and mouse settings and they seem to be fine. System monitor doesn't show any processes taking up significant CPU utilization. What else could be wrong?

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  • How effects found in "Autodesk Fluid FX" are implemented using OpenGL ES?

    - by afds
    How this kind of effects are technically implemented using OpenGL ES? Are they performing simulation on GPU (using Shaders) or CPU while using some smart vertex positioning and texturing? Why it appears so fast (in terms of performance)? You might check the video of that app here: http://www.youtube.com/watch?v=F4KOk6QP6kQ edit Here is the presentation for the app: http://www.futuregameon.com/FGO2010_JosStam.pdf

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  • YouTube: 14 NetBeans Web Development Tips in 7 Minutes

    - by Geertjan
    Are you sure you're getting everything out of NetBeans IDE? Here, especially for HTML5 developers, i.e., you're using some kind of combination of HTML, JavaScript, and CSS, is a slightly-HTML focused series of tips for NetBeans usage. Several secrets included, i.e., features that don't have much UI and that are a question of needing to know that they're there, otherwise you'll never know about them. Direct link to the (silent) movie: https://www.youtube.com/watch?v=JaqAi3r0k1Y

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  • Le Khronos Group publie les spécifications de OpenGL 3.3 et 4.0, après deux ans de la sortie d'OpenG

    Le Khronos Group publie les spécifications de OpenGL 3.3 et 4.0 Déjà deux ans après la sortie d'OpenGl 3.x, le Khronos Group nous offre le même jour les spécifications des nouvelles versions d'OpenGL : La version 3.3 et la version 4.0 Pour ces nouvelles versions la séparation Core et Compatibility demeurent et, nouveauté pour le GLSL, les versions ont dorénavant le même nom que la version de l'API sous laquelle elles ont été sortis. On nous promet aussi une version 4.0 optimisée, moins dépendante du CPU, notamment concernant la tesselation... N'étant pas familier a OpenGL je n'oserais en dire plus pour les plus curieux voici le lien :

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  • Organization &amp; Architecture UNISA Studies &ndash; Chap 13

    - by MarkPearl
    Learning Outcomes Explain the advantages of using a large number of registers Discuss the way in which compilers optimize register usage Discuss the evolution of CISC machines Describe the characteristics of RISC architecture Discuss the RISC vs. CISC controversy Describe the way in which RISC and CISC design principles can be combined Instruction Execution Characteristics To understand the the line of reasoning of RISC advocates, we need a brief overview of instruction execution characteristics. These include… Operations Operands Procedure Calls These three sections can be studied in depth in the textbook at pages 503 - 505 A number of groups have come up with the conclusion that the attempt to make the instruction set architecture closer to HLLs (High Level Languages) is not the most effective design strategy. Rather HLL’s can be best supported by optimizing performance of the most time-consuming features of typical HLL programs. Generally 3 main characteristics came up to improve performance… Use a large number of registers or use a compiler to optimize register usage Careful attention needs to be paid to the design of instruction pipelines A simplified (reduced) instruction set is indicated The use of a large register optimization One of the most important design principles of RISC machines is the use of a large number of registers. The concept of register windows and the use of a large register file versus the use of cache memory are discussed. On the face of it, the use of a large set of registers should decrease the need to access memory. The design task is to organize the registers in such a fashion that this goal is realized. Read page 507 – 510 for a detailed explanation. Compiler-based register optimization   Reduced Instructions Set Architecture There are two advantages to smaller programs… Because the program takes up less memory, there is a savings in that resource (this was more compelling when memory was more expensive) Smaller programs should improve performance, and this will happen in two ways – fewer instructions means fewer instruction bytes to be fetched and in a paging environment smaller programs occupy fewer pages, reducing page faults. Certain characteristics are common to RISC processors… One instruction per cycle Register-to-register operations Simple addressing modes Simple instruction formats RISC vs. CISC After initial enthusiasm for RISC machines, there has been a growing realization that RISC designs may benefit from the inclusion of some CISC features CISC designs may benefit from the inclusion of some RISC features

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  • How to refactor a method which breaks "The law of Demeter" principle?

    - by dreza
    I often find myself breaking this principle (not intentially, just through bad design). However recently I've seen a bit of code that I'm not sure of the best approach. I have a number of classes. For simplicity I've taken out the bulk of the classes methods etc public class Paddock { public SoilType Soil { get; private set; } // a whole bunch of other properties around paddock information } public class SoilType { public SoilDrainageType Drainage { get; private set; } // a whole bunch of other properties around soil types } public class SoilDrainageType { // a whole bunch of public properties that expose soil drainage values public double GetProportionOfDrainage(SoilType soil, double blockRatio) { // This method does a number of calculations using public properties // exposed off SoilType as well as the blockRatio value in some conditions } } In the code I have seen in a number of places calls like so paddock.Soil.Drainage.GetProportionOfDrainage(paddock.Soil, paddock.GetBlockRatio()); or within the block object itself in places it's Soil.Drainage.GetProportionOfDrainage(this.Soil, this.GetBlockRatio()); Upon reading this seems to break "The Law of Demeter" in that I'm chaining together these properties to access the method I want. So my thought in order to adjust this was to create public methods on SoilType and Paddock that contains wrappers i.e. on paddock it would be public class Paddock { public double GetProportionOfDrainage() { return Soil.GetProportionOfDrainage(this.GetBlockRatio()); } } on the SoilType it would be public class SoilType { public double GetProportionOfDrainage(double blockRatio) { return Drainage.GetProportionOfDrainage(this, blockRatio); } } so now calls where it used would be simply // used outside of paddock class where we can access instances of Paddock paddock.GetProportionofDrainage() or this.GetProportionOfDrainage(); // if used within Paddock class This seemed like a nice alternative. However now I have a concern over how would I enforce this usage and stop anyone else from writing code such as paddock.Soil.Drainage.GetProportionOfDrainage(paddock.Soil, paddock.GetBlockRatio()); rather than just paddock.GetProportionOfDrainage(); I need the properties to remain public at this stage as they are too ingrained in usage throughout the code block. However I don't really want a mixture of accessing the method on DrainageType directly as that seems to defeat the purpose altogether. What would be the appropiate design approach in this situation? I can provide more information as required to better help in answers. Is my thoughts on refactoring this even appropiate or should is it best to leave it as is and use the property chaining to access the method as and when required?

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  • Why does Ubuntu 12.10 only see 8 cores?

    - by tunnuz
    In our lab we just bought a new machine with two 8-cores Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz processors which also support Hyper-Threading. I would expect Ubuntu to see 32 processing units, however it only detects 8 of them (the equivalent of just one processor with Hyper-Threading disabled). The bios correctly reports a total of 32 processing units. I am using Ubuntu 12.10 desktop 32 bit. Any idea about how to solve this?

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  • How are people using virtualisation with SQL Server? Part 3

    - by GavinPayneUK
    Monitoring After CPU, memory and storage, monitoring is the fourth thing which changes massively according to Brent Ozar’s list when you move to virtualisation. Some of the performance counters we used to organise our lives around become meaningless and the performance of the host server is often over-looked when looking for problems. What’s encouraging here is that the majority of people are already looking beyond the performance of virtual server and at the performance of the host server. This...(read more)

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  • What legal considerations do I need to have when programming?

    - by JustJohn
    Recently I worked with a group to create a logging system for tutoring labs to track Tutor hours, and usage of the labs. We had to change the design a fair amount to be in compliance with FERPA. My question stems from the curiosity that in my course of study there has never been a real mention of how people in this field have to deal with complying with the law in their work. So I would like to know how much programmers have to consider the law in the work they do.

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  • How to make Runescape work on 12.04?

    - by Alex
    I'm trying to play Runescape on Chromium, but it runs really slowly. I have IcedTea Java from the Software Center. I had to install it for the game to work at all, but it's not playable. Does anyone have some good settings for me to use, or do I need a better way to have Java and Chromium work together so Runescape can run? Memory: 4.8GB CPU: AMD Athlon(tm) II X4 620 Processor × 4 GPU: Gallium 0.4 on NV50 (driver) = Geforce 8800 GTS OS type: 64bit

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  • Traits of a DBA - Part One – The Technical Side

    What does it take to become a database administrator, or what kinds of traits should I be looking for when I am hiring a DBA. Those traits can be summarized it two categories: Technical and Personal. In this article, Greg Larsen discusses the technical traits a DBA should have. Free eBook - Performance Tuning with DMVsThis free eBook provides you with the core techniques and scripts to monitor your query execution, index usage, session and transaction activity, disk IO, and more. Download the free eBook.

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  • Does OO, TDD, and Refactoring to Smaller Functions affect Speed of Code?

    - by Dennis
    In Computer Science field, I have noticed a notable shift in thinking when it comes to programming. The advice as it stands now is write smaller, more testable code refactor existing code into smaller and smaller chunks of code until most of your methods/functions are just a few lines long write functions that only do one thing (which makes them smaller again) This is a change compared to the "old" or "bad" code practices where you have methods spanning 2500 lines, and big classes doing everything. My question is this: when it call comes down to machine code, to 1s and 0s, to assembly instructions, should I be at all concerned that my class-separated code with variety of small-to-tiny functions generates too much extra overhead? While I am not exactly familiar with how OO code and function calls are handled in ASM in the end, I do have some idea. I assume that each extra function call, object call, or include call (in some languages), generate an extra set of instructions, thereby increasing code's volume and adding various overhead, without adding actual "useful" code. I also imagine that good optimizations can be done to ASM before it is actually ran on the hardware, but that optimization can only do so much too. Hence, my question -- how much overhead (in space and speed) does well-separated code (split up across hundreds of files, classes, and methods) actually introduce compared to having "one big method that contains everything", due to this overhead? UPDATE for clarity: I am assuming that adding more and more functions and more and more objects and classes in a code will result in more and more parameter passing between smaller code pieces. It was said somewhere (quote TBD) that up to 70% of all code is made up of ASM's MOV instruction - loading CPU registers with proper variables, not the actual computation being done. In my case, you load up CPU's time with PUSH/POP instructions to provide linkage and parameter passing between various pieces of code. The smaller you make your pieces of code, the more overhead "linkage" is required. I am concerned that this linkage adds to software bloat and slow-down and I am wondering if I should be concerned about this, and how much, if any at all, because current and future generations of programmers who are building software for the next century, will have to live with and consume software built using these practices. UPDATE: Multiple files I am writing new code now that is slowly replacing old code. In particular I've noted that one of the old classes was a ~3000 line file (as mentioned earlier). Now it is becoming a set of 15-20 files located across various directories, including test files and not including PHP framework I am using to bind some things together. More files are coming as well. When it comes to disk I/O, loading multiple files is slower than loading one large file. Of course not all files are loaded, they are loaded as needed, and disk caching and memory caching options exist, and yet still I believe that loading multiple files takes more processing than loading a single file into memory. I am adding that to my concern.

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  • Send raw data to USB parallel port after upgrading to 11.10 oneiric

    - by zaphod
    I have a laser cutter connected via a generic USB to parallel adapter. The laser cutter speaks HPGL, as it happens, but since this is a laser cutter and not a plotter, I usually want to generate the HPGL myself, since I care about the ordering, speed, and direction of cuts and so on. In previous versions of Ubuntu, I was able to print to the cutter by copying an HPGL file directly to the corresponding USB "lp" device. For example: cp foo.plt /dev/usblp1 Well, I just upgraded to Ubuntu 11.10 oneiric, and I can't find any "lp" devices in /dev anymore. D'oh! What's the preferred way to send raw data to a parallel port in Ubuntu? I've tried System Settings Printing + Add, hoping that I might be able to associate my device with some kind of "raw printer" driver and print to it with a command like lp -d LaserCutter foo.plt But my USB to parallel adapter doesn't seem to show up in the list. What I do see are my HP Color LaserJet, two USB-to-serial adapters, "Enter URI", and "Network Printer". Meanwhile, over in /dev, I do see /dev/ttyUSB0 and /dev/ttyUSB1 devices for the 2 USB-to-serial adapters. I don't see anything obvious corresponding to the HP printer (which was /dev/usblp0 prior to the upgrade), except for generic USB stuff. For example, sudo find /dev | grep lp produces no output. I do seem to be able to print to the HP printer just fine, though. The printer setup GUI gives it a device URI starting with "hp:" which isn't much help for the parallel adapter. The CUPS administrator's guide makes it sound like I might need to feed it a device URI of the form parallel:/dev/SOMETHING, but of course if I had a /dev/SOMETHING I'd probably just go on writing to it directly. Here's what dmesg says after I disconnect and reconnect the device from the USB port: [ 924.722906] usb 1-1.1.4: USB disconnect, device number 7 [ 959.993002] usb 1-1.1.4: new full speed USB device number 8 using ehci_hcd And here's how it shows up in lsusb -v: Bus 001 Device 008: ID 1a86:7584 QinHeng Electronics CH340S Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x1a86 QinHeng Electronics idProduct 0x7584 CH340S bcdDevice 2.52 iManufacturer 0 iProduct 2 USB2.0-Print iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 32 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 96mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 7 Printer bInterfaceSubClass 1 Printer bInterfaceProtocol 2 Bidirectional iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0020 1x 32 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0020 1x 32 bytes bInterval 0 Device Status: 0x0000 (Bus Powered)

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  • How To Speed Up Your Slow Computer

    Personal computers are an amazing invention. Computers make our jobs easier and provide interesting things for us to do at home or on the road. But over time, daily usage slows down a computer';s perf... [Author: Daniel T. Driver - Computers and Internet - May 09, 2010]

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  • Doing imagemagick like stuff in Unity (using a mask to edit a texture)

    - by Codejoy
    There is this tutorial in imagemagick http://www.imagemagick.org/Usage/masking/#masks I was wondering if there was some way to mimic the behavior (like cutting the image up based on a black image mask that turns image parts transparent... ) and then trim that image in game... trying to hack around with the webcam feature and reproduce some of the imagemagick opencv stuff in it in Unity but I am saddly unequipped with masks, shaders etc in unity skill/knowledge. Not even sure where to start.

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  • How to get HDMI sound work on a basic 12.04 install?

    - by Gubuntu
    I have just installed Ubuntu 12.04 (Precise) and am using it on my TV. The HDMI sound doesn't work. All I have installed is: The preinstalled codecs and other software, a KDE game called KsirK, Supertuxkart, and GIMP 2.8. I am using a custom built computer, and a LG TV. My processor is Pentium(R) Dual-Core CPU E5200 @ 2.50GHz dual core, OS is 32-bit, and I have 1.7GB of ram (after having to remove one stick due to failure).

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  • How can I move a library inside a project's source tree and compiling static binaries?

    - by AbrahamVanHelpsing
    How can I move a library inside a project's source tree and compiling static binaries? I want to use a particular tool that utilizes ANCIENT binaries without upgrading it's API usage. This way I can use the old libraries inside the single binary without wrecking the local host environment. I am on nix with netbeans/eclipse/code::blocks. I don't have a problem reading, just looking for a starting point. Any thoughts?

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  • Can my machine run Ubuntu( kubuntu | xubuntu | mint ) 12.04 WELL?

    - by Steve
    I have a 9 year old computer packing the hardware listed below. My question is, can I run 12.04 ( Ubuntu, Kubuntu, MINT or Xubuntu ) WELL? I was running Ubuntu 10.10 and I upgraded to 12.04 by going through each release via the update manager: 11.04 - 11.10 -12.04 During the installation process for 12.04 I saw an error message that there was an error installing and setting up part of the kernel. Later, when I tried installing a package in synaptic, I got another error message mentioning the kernel. When I rebooted, I got told somehting about my video and graphics was not configured properly and that I would have to do it manually ( like I know ). It gave me the option to enter the system in low graphics mode, but it just hanged. I had an old livecd of Xubuntu 10.10 around so I used that to get into my computer and copy data over to an external hard drive. I think tried to install Xubuntu 10.10 from the livecd, with the option "download updates" checked. The install process moved along a bit, then halted for about 5 hours. I rebooted my machine and tried the Xubuntu 10.10 installer WITHOUT the option to "download updates". The install completed in about 15 minutes. So, all of that is making me wonder if there is someting about 12.04 that does not like my hardware. I'm willing to try again, but only if I know I will not have to spend hours just to get to an error message and a hosed up system like I did last night. I also think I have a lot more RAM than is being reported in the output below. I had extra ram installed last year. I'm not good with the command line readouts, but there seems like there should be a lot more. I wasn't thrilled with Unity. I am willing to try Kubuntu 12.04. Will I run into the same problems? What is the highest version of a *ubuntu can I upgrade to? Thanks CPU Model: Intel(R) Pentium(R) 4 CPU 2.53GHz Frequency: 2533.223 MHz L2 Cache: 512 KB Bogomips: 5066.44 Numbering: family(15) model(2) stepping(7) Flags: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up pebs bts cid RAM ~$ free -mt total used free shared buffers cached Mem: 1506 891 615 0 91 521 -/+ buffers/cache: 278 1227 Swap: 1609 0 1609 Total: 3116 891 2225 Video Card 01:00.0 VGA compatible controller: nVidia Corporation NV18 [GeForce4 MX 440 AGP 8x] (rev a2) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. V9180 Magic Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 16 Memory at fd000000 (32-bit, non-prefetchable) [size=16M] Memory at f0000000 (32-bit, prefetchable) [size=64M] Expansion ROM at fe9e0000 [disabled] [size=128K] Kernel driver in use: nouveau Kernel modules: nouveau, nvidiafb Motherboard Intel 845PE ATX 533FSB DDR333 USB2

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  • 13.04: update-initramfs works but mkinitramfs fails from APT

    - by Phil2.0
    I'm experiencing a strange thing, I've freshly upgraded from 12.10 to 13.04, Everything is fine except that it can't build the initrd image automatically, it fails and prints out the mkinitramfs's Usage output. I tried to debug the "mkinitramfs" script and it appears the $outfile variable is never set. However, I'm able to produce the ramdisk manually like follow: update-initramfs -c -u 3.0.8-23-generic I tried most of the stuff seen on the net: purge, reinstall but no help but nothing, and I can't use linux-image is marked as "broken" but the kernel exists in /boot.

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  • ubuntu 14.04 freezes randomly

    - by rajesh chowdary
    I have installed Ubuntu 14.04 version along side with windows 7. Ubuntu freezes randomly I am unable to use any keys on keyboard since they are not working even mouse is not working.the only solution to get off from this freeze is restarting my computer.I have ATi/AMD graphic card but I removed it before installing Ubuntu 14.04.I have run memory test no problem with ram.please give some solution to get rid of this abnormal freeze. thanks in advance. system configuration CPU=Intel core 2 duo e7500 2.93ghz motherboard=Intel dg41wv hard disk=Seagate 500gb ram=4gb

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  • problem with grafics on ubuntu 12.10

    - by kargeo
    please help I just install 12.10 x86_64 to my new computer amd fx8120 cpu ati hd 7770 msi 990 fxa and I'm facing the following error: 2012-11-17 18:19:04,393 WARNING: /sys/module/fglrx/drivers does not exist, cannot rebind fglrx driver From :additional drivers" can not install the ati drivers From "system settings" "software sources" only the x.org server is working but with problems Compiz works continuously and if I open for example a video the fun is running like crazy The mouse pointer goes slow The windows act strange (flashing, don't open, open slowly etc) What should I do? Thanks

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  • Is it already possible to enable Compiz on an i5 Thinkpad laptop?

    - by jmm
    Besides a number of other issues, I still cannot enable Compiz or any effects with Maverick on a Thinkpad X201. I understand this laptop is supported by Ubuntu, yet I have found a good number of posts reporting problems. I would like to know if they have been solved by now. Processor: 4x Intel(R) Core(TM) i5 CPU M 540 @ 2.53GHz Intel Corporation Core Processor Integrated Graphics Controller (rev 02) OpenGL Renderer Mesa DRI Intel(R) Ironlake Mobile GEM 20100330 DEVELOPMENT 2.6.35-27-generic #47-Ubuntu SMP Thanks for your help, jmm

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  • Do Websites Work?

    A website should, from brochure ware sites through to e-business and e-commerce sites, engage and enable users to interact, transact and share knowledge online. I could quote many statistics about website usage, e-business, e-commerce models and search engine marketing etc, but I won't.

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