Hi Johannes,
My understanding is that each node keeps its own instance of the globals (we run different matlab sessions that do not communicate). Also, if I remember correctly, the global variable storing the penalty, is not updated in the metropolis (it should always be equal to Inf). This variable is used for the optimization (csminwel) algorithm which is not parallelized.
Best, Stéphane.
-- Stéphane Adjemian Université du Maine, Gains & Dynare Team
Le 27 avr. 2015 à 15:55, Johannes Pfeifer pfeifer@uni-mannheim.de a écrit :
Hi, does anyone know how parallel execution works with global variables? In random_walk_metropolis_hastings.m we define at the beginning
global objective_function_penalty_base objective_function_penalty_base = Inf;
How is this variablem treated in parallel execution. In particular, what happens if one of the instances/nodes changes this value for objective_function_penalty_base? Does this affect all other nodes? Or does each node keep its own instance of the global variable?
I would be grateful for any insights.
Best,
Johannes
--
Johannes Pfeifer Department of Economics University of Mannheim L7, 3-5, Room 242 68131 Mannheim Germany +49 (0)621 181-3430
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