cosmomc-mpi problem

Use of Healpix, camb, CLASS, cosmomc, compilers, etc.
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qiang wu
Posts: 1
Joined: October 25 2007
Affiliation: Baylor University

cosmomc-mpi problem

Post by qiang wu » October 25 2007

I'm running MCMC for a dark energy model and got a problem. In the program, we have a mpi convergence function to end the program, if the convergence reaches the requirement, the program ends normally, if the convergence doesn't reach the requirement, then the program will be ended by the number of runs. Now I run 4 mpi chains, one chain may reach the maximum number first, and that chain got end, but now the problem
is that other chains can't continue and the program just hang over there. Does anyone get the same problem like this?

Antony Lewis
Posts: 1501
Joined: September 23 2004
Affiliation: University of Sussex
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Re: cosmomc-mpi problem

Post by Antony Lewis » October 26 2007

The maximum number of samples isn't intended to be used with MPI convergence tests: set it to a very high number and wait for the chain to converge, or turn off the convergence stopping.

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