I have a quick question of how rstan deals with multithreading (using map_rect) and multiple cores.
I am interested in running 2 chains at once using a node with 24 processor on it. I have the model working with map_rect now and running with 1 chain. To use multiple threads I am calling:
Sys.setenv("STAN_NUM_THREADS" = 12) mods <- stan(file="polar_voter_map.stan", cores=1, chains=1...
If I change
cores=2, will this try to use 24 threads then total? Or will it just use all 12 threads between the 2 chains? Or something else?