Tag: Beginner
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OpenMP Barrier Construct
In OpenMP, Barrier construct is used for synchronization among the threads within a given parallel region. This is the easiest way to synchronize across all the threads. Synchronization is required in many cases. For example, data produced by some/all threads needs to be used/consumed by some/all the other threads in the same parallel region. Here,…
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OpenMP C/C++: Hello World!
This is the first OpenMP program, one can write for understanding the parallelization process using OpenMP. First, let us find out how to compile and execute this code. The ‘-fopenmp’ option here requests compiler to generate parallel threads for the given code using OpenMP. If we do not provide this option, compiler will ignore all…
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Profiling C codes using GNU’s profiler – gprof
This post covers the steps to profile a C code using GNU’s profiler – gprof. Profiling your serial code is one of the most important step in writing parallel codes. We use profilers to find out the most time consuming parts of the code. Let us consider following sample C code. Fore this code, we…