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Top Forums Programming C POSIX: Analyze a Boggle board using 100% CPU on a quad core. Post 302358442 by HeavyJ on Friday 2nd of October 2009 02:12:36 PM
Old 10-02-2009
C POSIX: Analyze a Boggle board using 100% CPU on a quad core.

I have written the worlds most advanced lexicon data structure in order to score a Boggle Board using a parallel algorithm.

I ran into a problem. Using mutexes and condition variables did not allow me to use 100% of the CPU resources on my quad core Q9450.

I wonder if the problem is that the worker threads call the same recursive function many thousands, to millions of times per second.

Should each thread have its own identical recursive function defined so that they are not all waiting to access the memory where the function is stored?

Thank You,

HeavyJ
 

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HOOLA(6)							  Freecell Solver							  HOOLA(6)

NAME
freecell-solver-range-parallel-solve - The Freecell Solver utility for solving a range of Microsoft Freecell/Freecell Pro Boards SYNOPSIS
freecell-solver-range-parallel-solve start end print_step [--binary-output-to filename] [--total-iterations-limit limit] [fc-solve Arguments...] DESCRIPTION
freecell-solver-range-parallel-solve is a command line application that solves a range of Freecell deals of Microsoft Freecell and Freecell Pro. start is the first board to solve; end is the last (inclusive) and print_step is the division of board numbers in which to print a status message. Following this three mandatory parameters are several flags specific to the range solve. (refer to the OPTIONS section for more information) Afterwards one can give it a fc-solve command line that it will use to solve each board. Refer to the fc-solve(6) man page for information about its options. OPTIONS
--total-iterations-limit sets the maximal number of iterations with which to try to solve each deal. After that, the program will give up and report that the board was intractable. --binary-output-to sets the filename into which to output the number of iterations it took to solve each board. This file can later be used with statistical preset optimizers such as those found in the Freecell Solver version control repository. SEE ALSO
fc-solve(6) AUTHOR
Shlomi Fish, <http://www.shlomifish.org/> . Freecell Solver 3.12.0 2012-06-22 HOOLA(6)
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