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CUDA advertises itself as a parallel computing platform. However, I'm having trouble seeing how it's any different from a software framework (a collection of libraries used for some functionality). I am using CUDA in class and all I'm seeing is that it provides libraries in C for - functions that help in parallel computing on the GPU - which fits my definition of a framework. So tell me, how is a platform like CUDA different from a framework? Thank you.
CUDA the hardware platform, is the actual GPU and its scheduler ("CUDA architecture"). However CUDA is also a programming language, which is very close to C. To work with the software written in CUDA you also need an API for calling these functions, allocating memory etc. from your host language. So CUDA is a platform, a language and a set of APIs.
If the latter (a set of APIs) matches your definition of a software framework, then the answer is simply yes, as both options are true.
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For my science fair project I have to write a computationally-intensive algorithm that is well suited to parallelization. I have read about OpenCL and CUDA and it seems they are mainly used from C/C++. While it would not be that difficult for me to pick up a bit of C to write a simple main, I was wondering how big the performance hit would be if I used Java or Python bindings for my GPU computation? Specifically, I was more interested in the performance hit using CUDA because that's the framework I'm planning on using.
In general, every time you add an abstraction layer you're loosing performance but, in the case of CUDA this is not completely true because, whether using Python or Java you'll end up writing your CUDA kernels on C/Fortran, so the performance in the GPU side will be the same as using C/Fortran (check some pyCUDA examples here)
The bad news it that Java and Python will never achieve the performance of compiled languages such as C on certain tasks, see this SO answer for a more detailed discussion about this topic. Here is a good discussion about C versus Java, also on SO.
There are many questions and discussions about performance comparison between interpreted and compiled languages, so I encourage you to read some of them.
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I want to know what role play CPUs when HPC Linpack (CUDA version) is runnig. They are recieving data from other cluster nodes and performing CPU-GPU data exchange, arenot they? so thier work doesnot influence on performance, yes?
In typical usage both GPU and CPU are contributing to the numerical calculations. The host code will use MKL or another BLAS implementation for host-generated numerical results, and the device code will use CUBLAS or something related for device numerical results.
A version of HPL is available to registered developers in source code format, so you can inspect all this yourself.
And as you say the CPUs are also involved in various other administration activities such as internode data exchange in a multinode setting.
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I am compiling a list of programming languages for Windows. I am aware of Wikipedia the like, which has comprehensive lists of Languages available on Windows.
But what I am most interested in, are Programming Languages that can be used to create GUI Desktop apps for Windows, and those languages that are not listed in these places that list languages.
I know there are many, many more languages out there that aren't on the lists. But what are they?
You are not looking for just languages, but also for frameworks. Any language that can access and call DLL functions can make Windows GUIs, since the Win32 API is just a series of DLLs. But there are tons of GUI frameworks that sit on top of the Win32 API, and are written in tons of different languages.
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I am a software development guy. Lately I was thinking of trying out some firmware development, as the company I work for is trying to enter that domain.
I have many questions regarding firmware devlopment - like:
What are the tools used - like IDE?
In which language is most of the code written in?
How to port the code into microcontroller?
How to code for different microcontrollers?
How to determine things I would need for building a specific application(choosing the microcontroller etc.)?
Anything else I should know about and where do I start? Sorry if this question is too basic, but I could not find out any satisfactory answers elsewhere.
Most microcontrollers have decent C compilers so are best coded for in C, although you might need to delve into assembly routines for occassional high performance routines. The choice of microcontroller is usually determined by the hardware demands, on board peripherals, performance and cost constraints.
You wouldn't generally be porting code from a Windows/Linux/Mac environment to a microcontroller one; you would generally be writing directly for the microcontroller, so strictly the compiler is a cross compiler - compiling on your PC to run on a different processor. You typically get debuggers, emulators and full editor capabilities in the IDE, so its a similar experience to writing code in a PC environment, but it runs slower, and has to be downloaded to the target hardware or emulated to be tested.
A great authority to start reading about embedded development is Jack Gansle and his firmware handbook. Also www.embedded.com for general articles.
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I need some resources for implementing a simple virtual machine and interpreted language. Something that is pratical is most useful. I have read the Virtual Machine Implementation book and found that it is quite old and doesn't represent the vms I see today. Also if someone know of a fairly simplistic language that would be great as well.
check The implementation of Lua 5.0
You don't say if this is for a new project, to work with an existing project, for learning, or what target environment, language, and OS you're using.
If you want to learn about implementing your own VM and scripting language, get the book Game Scripting Mastery. Despite its title, it is actually about implementing your own virtual machine and scripting language. The source code is for Win32, but the concepts can be applied to .Net or Linux.
As a bonus, when you're done you will have a playable, scriptable, 2D adventure game.