Cmdstanr reduce sum case study, but: unused argument (threads = TRUE)

[mitzimorris]

@shira

These compile and sample. But how do I modify to set cores and threads, following the Reduce Sum: A Minimal Example case study ? How can I time things ?

in CmdStan, you need to run the make command to compile everything with threading on - if you’re using the CmdStan 2.23 release, the easiest way to do this is:

make clean-all
make STAN_THREADS=TRUE build
make STAN_THREADS=TRUE my_model

to time things, use the linux time command -

time my_model sample file=my.data.json yada yada yada

there’s no control for cores - since CmdStan runs a single chain, with threading on, it’ll use all available cores - @wds15 or @rok_cesnovar - is this correct?