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Programming for Multi-Core Processors

 
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Programming for Multi-Core Processors
ReggaetonKing
6 Dec, 2007 - 08:55 PM
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I am extremely interest programming for multiprocessors. Has anyone actually programmed for multiprocessors? Would multi-threading execute differently on a multi-core system than on a single core? I have some experience in developing multi-threading apps in Java and C#. Does anyone have any tips and what exactly the best language to use? C/C++ have been on my mind but I a lot more experience with C# and Java. (i know, i know...)
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Nayana
RE: Programming For Multi-Core Processors
6 Dec, 2007 - 09:52 PM
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C# and Java are both probably fine for working with multi-core processors. Not only that, but threading in those languages is a lot easier than in C++.

If your program isn't CPU intensive, it doesn't really matter if you optimise it for multi core anyway. If it is CPU intensive (or gets so at times) then it is a good time to think about it.

But as long as you split up intensive tasks, and run them in different threads, the OS should split them up between cores for you anyway. And from a program operation perspective, there won't be much difference between running the program on a single core, or multi-core machine, except that it will go a lot faster on a multi-core machine.
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ReggaetonKing
RE: Programming For Multi-Core Processors
6 Dec, 2007 - 11:35 PM
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Sweet. Thanks for clearing that up!
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1lacca
RE: Programming For Multi-Core Processors
7 Dec, 2007 - 01:34 AM
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The main difference with multicore or multi cpu systems is that you can run into locking problems more easily (since the different threads will be executed simultaneously and not by switching between them, and some performance optimisation is different, because the cores have their own registers and cache, so the same code might behave really differently)
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