Parallel Programming with Intel Parallel Studio XE by Stephen Blair-Chappell, Andrew Stokes
By Stephen Blair-Chappell, Andrew Stokes
Parallel programming is speedily turning into a "must-know" ability for builders. but, the place to begin? This teach-yourself instructional is a perfect place to begin for builders who already understand home windows C and C++ and are desirous to upload parallelism to their code. With a spotlight on utilizing instruments, ideas, and language extensions to enforce parallelism, this crucial source teaches you the way to put in writing courses for multicore and leverage the facility of multicore on your courses. Sharing hands-on case stories and real-world examples, the authors study the demanding situations of every undertaking and enable you conquer them.
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Extra info for Parallel Programming with Intel Parallel Studio XE
If Core 1 alters Var A and then Core 2 alters Var B in a repeated sequence, this will result in the cache lines being continually flushed and updated. The flushing and updating of the cache line adds extra cycles to the time it takes to read the variables. Although the variables are not logically shared between the two cores, because the two variables sit on the same cache line, they are effectively being shared by the mechanism the CPU employs to keep the cache line values correct. indd V3 - 02/24/2011 Page 19 Parallelism and the Programmer x 19 Detecting false sharing is difficult, but it can be made easier with a tool such as VTune Amplifier XE, which enables you to carry out an architectural analysis of the running program.
Finally, the chapter presents a number of different programming models that you can use to add parallelism to your code. THE ARRIVAL OF PARALLELISM Parallelism is not new; indeed, parallel computer architectures were available in the 1950s. What is new is that parallelism is ubiquitous, available to everyone, and now in every computer. The Power Density Race Over the recent decades, computer CPUs have become faster and more powerful; the clock speed of CPUs doubled almost every 18 months. This rise in speed led to a dramatic rise in the power density.