Code Optimization for Parallel Processing Part 3: Writing Programs for Distributed-Memory Parallel Machines by David Gilbert The effort to create a standardized means of writing programs for distributed-memory parallel machines began in earnest in 1992. This effort to standardize came from a desire to take parallel computing outside the bounds of government and academia, and achieved success in 1994 with the Message-Passing Interface standard, version 1.0. Since then, there have been minor revisions to the MPI standard, which reached version 1.2 in 1997. Beyond this, there has been quite a bit of functionality added to the original standard, and this is known as MPI 2.0. In addition, several proprietary "optimized" MPI implementations are in existence for platform-specific applications, and there is now a substantial effort to create a Java MPI. Let's take a look at the MPI standard and what function it serves in parallel programming, as well as some general ideas on how to optimize the use of it.   Click here to read the complete article.
	Writing Efficient C Code for Microcontrollers Part 5: Prime Real Estate by Bill Sprouse Many microcontrollers have multiple memory types that have unique access abilities and speed. They may have internal memory, which is almost as fast to access as internal registers. This memory can sometimes be operated upon directly with a variety of operations. Because of the speed, additional instructions, and small address requirements, these locations become prime real estate in the world of microcontrollers. By wisely choosing when and how to use this memory, you can reduce the code size and at the same time improve speed.   Click here to read the complete article.

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Code Optimization Archive

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